Unique Porous Structure Research Articles

Metal-organic framework derived in-situ 3D porous CuS@carbon octahedron for enhanced electrochemical detection of ascorbic acid

Sensitive and reliable detection of the antioxidant ascorbic acid (AA) is crucial for biosensing and food safety applications. Herein, CuS/carbon composites (CuS@C-c) with porous octahedral structure were successfully fabricated by pre-carbonization and then sulfidation of the precursor Cu-MOF templates, which allowed for the in-situ encapsulation of CuS into the carbon matrix, simultaneously endowing the CuS@C-c with high conductivity and rigid structure protection. Benefiting from the unique structural features, the CuS@C-c displayed significantly improved electrochemical performance compared with hydrothermal disordered structural products (CuS@C-h). The CuS@C-c was employed for preparing the modified electrode and exhibited distinguished electrocatalytic oxidation of AA with a wide linear range of 0.1–1000.0 μmol/L and a low detection limit of 0.03 μmol/L, which could be attributed to synergistic contributions of CuS and carbon matrix, as well as their unique 3D open porous structure, which provided abundant accessible active sites and accelerating electron transfer. The developed electrode showed good anti-interference ability, long-term stability, and reproducibility and was able to efficiently detected AA contents in pharmaceuticals and human urine samples with acceptable recoveries.

In situ XPS demonstrated efficient charge transfer of ohmic junctions based on graphdiyne (g-CnH2n-2) nanosheets coupled with porous nanoflowers Ni5P4 for efficient photocatalytic H2 evolution

The photocatalytic hydrogen evolution ability of catalyst can be effectively improved by constructing suitable heterojunction. The present study involves a new type of carbon-material semiconductor graphdiyne (GDY) was prepared by ball milling assisted reduction elimination reaction, and introduced into metal-rich Ni5P4 nanoflowers by hydrothermal method. GDY/Ni5P4 ohm junction was successfully constructed to regulate the electron direction. The C ≡C bond in GDY exhibits high reducibility, which is conducive to inhibiting the oxidation of Ni5P4. The unique porous nanoflower-like structure of Ni5P4 enables it to achieve complete contact with solvents, thereby enhancing proton absorption capabilities. The construction of an ohmic junction is confirmed to induce electron transfer from GDY to Ni5P4 through situ XPS characterization, thereby suppressing the recombination of electron-hole pairs in GDY. Among them, 15%GDY/Ni5P4 has the best photocatalytic hydrogen evolution activity of 11713.6 μmol h−1 g−1, which is about 15 times higher than that of GDY (755.4 μmol h−1 g−1) and 5 times that of Ni5P4 (2369.6 μmol h−1 g−1). This work provides a new way to construct ohm junction based on GDY for photocatalytic hydrogen evolution.

Single-Nanoparticle-Based Nanomachining for Fabrication of a Uniform Nanochannel Sensor.

The structure of nanomaterials and nanodevices determines their functionality and applications. A single uniform nanochannel with a high aspect ratio is an attractive structure due to its unique rigid structures, easy preparation, and diverse pore structures and it holds significant promising importance in fields such as nanopore sensing and nanomanufacturing. Although the metal-nanoparticle-assistant silicon etching technique can produce uniform nanochannels, however, the fabrication of single through nanochannels remains a challenge thus far. A simple and versatile strategy is developed that allows for the retention of individual gold nanoparticle on a substrate, enabling single-nanoparticle nanomachining. This method involves three steps: the formation of a carbon protective layer on individual nanoparticles via electron-beam irradiation, selective removal of unprotected nanoparticles using a corrosive agent, and subsequent elimination of the carbon layer. This enables the fabrication of a single submillimeter-long uniform through nanochannel in the silicon wafer, which can be employed for nanopore sensing and shape-based nanoparticle distinguishing. The developed method can also facilitate single-nanoparticle studies and nanomachining for a broad application in materials science, electronics, micro/nano-optics, and catalysis.

(B, N)‐Rich B−C−N Nanosheet‐assembled Microwires as Effective Electrocatalysts for Oxygen Reduction Reaction

AbstractDeveloping highly active and stable nanocarbon electrocatalysts for the oxygen reduction reaction (ORR) in alkaline medium has attracted much attention due to their potential as an alternative to traditional metal‐based or noble metal catalysts. Herein, a unique micro‐nano structure of (B, N)‐rich B−C−N nanosheet‐assembled microwires (BCNNAM) were synthesized and driven electrochemical oxide reduction reaction. The diameter of the microwires about 1 μm, while the nanosheets have an average thickness of less than 20 nm. The compact nanosheets are mostly separated with a bending, curling and crumpling morphology. All those constitutes a ternary system with large surface area and abundant activity sites facilitate fast mass/electron transport for ORR catalytic activity. Thus, the B, N‐rich B−C−N nanosheet‐assembled microwires show significantly improved electrocatalytic activity with an onset potential of 0.95 V and half‐wave potential of 0.83 V compared to BNNAM, nitride‐doped carbon, porous carbon and a commercial Pt/C electrocatalyst. Such high catalytic performance of B, N‐rich B−C−N micro‐nano structures is due to the enhanced activity by the coexistence of B, C and N and the mass transfer promoted by the unique hierarchical porous structure.

Porous NiCo-LDH microspheres obtained by freeze-drying for efficient dye and Cr(VI) adsorption

Hierarchical NiCo-LDH microspheres (NiCo-LDHM) were synthesized via a simple one-step hydrothermal process in the presence of 2-methylimidazole, and a freeze-drying technique was subsequently used to further adjust its microstructure. The obtained porous hierarchical microspheres are about 5 µm in average diameter, and consist of ultrathin nanosheets with an average thickness of 5 nm. The freeze-drying endows LDH microspheres with higher surface area and improved pore structure. The unique hierarchical porous structure, high specific surface area and positive surface charge together contribute NiCo-LDHM’ excellent capability for anionic dyes and heavy metal ions removal, its theoretical adsorption capacities for Congo red (CR), acid fuchsin (AF) and Cr(VI) are 2120, 1176 and 123 mg/g at room temperature respectively. The adsorption of pollutant molecules/ions onto NiCo-LDH microspheres conforms to the quasi-secondary kinetics model. Isotherm studies suggest that the CR adsorption onto adsorbent fits Langmiur model, while AF/Cr(VI) adsorption fits Freundlich model, indicating that the size and morphology of pollutant molecules influence the adsorption process. The adsorption is a spontaneous endothermic process and NiCo-LDHM demonstrates good recyclability, the removal rates of CR, AF and Cr(VI) can still reach 90.7%, 84.7% and 82% after five cycles, respectively. In addition, NiCo-LDH hierarchical microspheres also exhibit good anionic selective adsorption capacity in mixed-dye systems, displaying great potential for water restoration and dye recycling.

MOF-derived amorphous molybdenum trioxide anchored on nitrogen-doped porous carbon by facile in situ annealing for efficient oxidative desulfurization

Electron transfer between supports and metal oxides is of great significance in optimizing the catalytic activity, while this is still an open issue for understanding its real role in the oxidative desulfurization (ODS) process. Herein, the defective molybdenum trioxide derived from molybdenum-based metal–organic frameworks was highly dispersed on nitrogen-doped porous carbon (VO-MoO3@NPC) by a single-step carbonization treatment. The uniform integration of organic moieties and the unique porous structure of carbonaceous materials are conductive to the active site exposure and mass transfer process during the ODS reaction. Meanwhile, richer oxygen vacancies are generated due to the weakened Mo-O bonds, which is pertinent to the promoted electron transfer between nitrogen-doped porous carbon and molybdenum trioxide by shrinking the band gap. The results manifest that the obtained VO-MoO3@NPC realizes an extraordinary desulfurization efficiency of 99.1% within 20 min, as well as a stable recyclability of up to 9 times. Furthermore, the catalyst delivers an extremely remarkable turnover frequency of 96.2 h−1, which is far superior to that of previously reported molybdenum-based catalysts. This manuscript provides new inspiration for designing excellent ODS catalysts by introducing electron-rich nitrogen to construct strong metal-support interactions.

The Art of Exploring Diatom Biosilica Biomaterials: From Biofabrication Perspective.

Diatom is a common single-cell microalgae with large species and huge biomass. Diatom biosilica (DB), the shell of diatom, is a natural inorganic material with a micro-nanoporous structure. Its unique hierarchical porous structure gives it great application potential in drug delivery, hemostat materials, and biosensors, etc. However, the structural diversity of DB determines its different biological functions. Screening hundreds of thousands of diatom species for structural features of DB that meet application requirements is like looking for a needle in a seaway. And the chemical modification methods lack effective means to control the micro-nanoporous structure of DB. The formation of DB is a typical biomineralization process, and its structural characteristics are affected by external environmental conditions, genes, and other factors. This allows to manipulate the micro-nanostructure of DB through biological regulation method, thereby transforming the screening mode of the structure function of DB from a needle in a seaway to biofabrication mode. This review focuses on the formation, biological modification, functional activity of DB structure, and its application in biomaterials field, providing regulatory strategies and research idea of DB from the perspective of biofabrication. It will also maximize the possibility of using DB as biological materials.

Electrostatic Spraying Microspheres of Nano Boron and Its Constant-Volume Combustion with Potassium Nitrate

ABSTRACT The nanometer boron (nB) powders have become the most promising high-energy additive in the field of fuel-rich solid propellants due to their extremely high gravimetric and volumetric calorific value. However, further applications are limited by its disadvantages such as easy agglomeration, easy oxidation, high ignition temperature, and incomplete energy release. Herein, nB powders were pre-agglomerated into microspheres by electrostatic spray method using fluoropolymer (F2602) as binders. The morphology and structure of the samples were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray energy spectrometry (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), infrared spectroscopy (IR), and Brunauer-Emmett-Teller (BET). Results showed that the pre-agglomerated nB microspheres had good dispersion, high sphericity, and no surface oxide. The thermal performance and combustion performance of the samples were characterized by a synchronous thermal analyzer and combustion pressure test device. Results showed that the nB microspheres had the highest oxidation weight gain within 1000°C and lowest activation energy compared to the same scale micron boron. In addition, the microspheres significantly shorten the combustion time and improve the combustion efficiency.The pressurization rate of nB microspheres is 4.12 times that of micron boron powders and 2.85 times that of nB powders. These excellent properties may be related to its unique spherical porous structure. Therefore, the preparation of nB microspheres with controllable structure by electrostatic spraying has a good application prospect.

Three-dimension porous Zn-Cu alloy: An inexpensive electrocatalyst for highly selective CO2 reduction to CO in non-aqueous electrolyte

Designing cheap and highly active electrochemical CO2 reduction (ECO2R) systems are crucial for their commercial applications. Herein, we report a 3D porous Zn-Cu alloy electrode for ECO2R to CO. A small amount of Cu has a dramatic effect on the micro-morphology of the electrode. Furthermore, DFT calculations confirm that Zn-Cu alloying significantly reduces the formation energy barrier of *CO intermediates. The synergy between the unique 3D porous structure and the alloying effect enables the Cu0.3Zn9.7 electrode to achieve up to 90.69 % Faraday efficiency (FE) for CO at −1.2 V (vs. reversible hydrogen electrode (RHE)). Furthermore, we prepare a novel non-aqueous cathode electrolyte consisting of deep eutectic solvent (DES) and propylene carbonate (PC) for ECO2R. The FECO of Cu0.3Zn9.7 increased to 94.89 % and the reduction potential decreased to −1 V (vs. RHE). The low cost of preparing 3D porous electrodes and the ease of synthesizing the novel non-aqueous electrolyte render this ECO2R system for CO promising for large-scale application.

Anthracene-based fluorescent conjugated porous polymers for highly sensitive detection of 2,6-dichloro-4-nitroaniline pesticide in a water environment

Designing fluorescent probes to achieve sensitive and rapid detection of pesticide 2,6-dichloro-4-nitroaniline (DCNA) in a water environment is highly appealing. Here, anthracene-based fluorescent conjugated porous polymers (ACPP) with a partially π-extension wall have been synthesized via a Suzuki coupling reaction for sensitive and rapid detection of DCNA pesticide. The unique pore structure extending anthracene unit into the pore not only improve the host-guest interaction of the polymer and analytes, but also increase the possibility of photoinduced electron transfer (PET) by shortening the electron hopping distance, thus improving the fluorescence detection performance. Benefiting from the synergistic effects of competitive energy absorption, PET and host-guest interaction, the ACPP can be used to detect DCNA pesticide with fast response (<2 s) and high quenching constant (Ksv = 3.8 × 105 M−1). The ACPP-based portable test strips and sol-gel sensors were successfully applied to the portable detection of DCNA in real food samples.

MOF-derived flower-like Fe-doped Co3O4 porous hollow structures with enhanced n-butanol sensing properties at low temperature

Metal oxide-based gas sensors are widely used in the detection of toxic and harmful gases due to their advantages of high precision, convenient use and stable performance, but their application range is limited due to the high working temperature. In this work, MOF-derived flower-like Fe-doped Co3O4 porous hollow structures are obtained using a simple solvothermal method. The obtained samples are characterized in terms of their crystalline structure, morphology, chemical composition, optical properties and specific surface area. This study systematically investigates the sensing performance of pristine and Fe-doped Co3O4 samples. The results show that the 2 at% Fe-Co3O4 sample has the best n-butanol sensing properties. This sample exhibits high response and rapid response/recovery speed at a low working temperature of 110 °C, as well as good repeatability and anti-humidity features. The enhanced sensing properties can be attributed to several factors, including the adjustment of baseline resistance, increase in oxygen vacancies, decrease in bandgap, and the formation of unique hollow and porous structures. Overall, this work provides valuable insights into the potential applications of Fe-doped Co3O4 materials in sensing technologies.

A dual-functional lignin containing pulp foam for solar evaporation and contaminant adsorption

Recently, solar-driven evaporator has been widely investigated as an environmentally benign and sustainable method in water desalination and purification, but its evaporation efficiency is highly reliant on solar intensity, and the increased contamination in water can hinder the production of clean water. Herein, we designed a novel and scalable polydopamine-functionalized lignin containing pulp (LPNR@PDA) foam evaporator with the dual-purpose of high-efficiency desalination and multi-contaminant adsorption. With excellent light absorption (90 %), high water absorption ability (9.5 g g−1), low thermal conductivity (0.1 W mK−1) and chelation capabilities, the LPNR@PDA foam evaporator synergized solar evaporation and contaminant adsorption with one another, making the LPNR@PDA foam evaporator a desirable material with the capability of continuous clean water production in all-weather conditions. Additionally, the LPNR@PDA foam evaporator with unique porous structure presented potential applications in treatments of metal ion concentration and contaminated seawater, and also the LPNR foam exhibited excellent biodegradability in the natural environment compared to polystyrene foam. Therefore, this novel foam material will shine a new light for developing multifunctional photothermal system for solar-driven water purification.

Hierarchical Porous Amidoximated Metal-Organic Framework for Highly Efficient Uranium Extraction.

With the rapid development of industry and technology, high-efficiency extraction of uranium from seawater is a research hotspot from the aspect of nuclear energy development. Herein, a new amidoximated metal-organic framework (UiO-66-DAMN-AO) constructed through a novel organic ligand of 2-diaminomaleonitrile-terephthalic acid (BDC-DAMN) is designed via one-step post-synthetic methods (PSM), which possess the merit of abundant multiaffinity sites, large specific surface area, and unique porous structure for efficient uranium extraction. Adopting one-step PSM can alleviate the destruction of structural stability and the reduction of the conversion rate of amidoxime groups. Meanwhile, introducing the BDC-DAMN ligand with abundant multiaffinity sites endow UiO-66-DAMN-AO with excellent adsorption ability (Qm=426.3mgg-1) and selectivity. Interestingly, the UiO-66-DAMN-AO has both micropores and mesopores, which may be attributed to the partial etching of UiO-66-DAMN-AO during the amidoximation. The presence of mesopores improves the mass transfer rate of UiO-66-DAMN-AO and provides more exposed active sites, favoring the adsorption of uranium on UiO-66-DAMN-AO. Thus, this study provides a feasible strategy for modifying metal-organic framework (MOFs) with plentiful amidoxime groups and the promising prospect for MOF-based materials to adsorb uranium from ocean.

Asymmetric c-MWCNT/AgNWs/PANFs hybrid film constructed by tailoring conductive-blocks strategy for efficient EMI shielding

Currently, extensive utilization of wireless devices require human being tantamount to tackle electromagnetic wave pollution to avoid serious harm to health body and precision equipment. Herein, asymmetric structure hybrid film were developed from para-aramid nanofiber (PANFs), carboxylated multiwalled carbon nanotubes (c-MWCNT) and silver nanowire (AgNWs) through vacuum-assistant filtration and freeze drying route. The robust and high aspect ratio PANFs established matrix foundation for forming large scale hybrid film, which rendered feasible support for conductive building blocks c-MWCNT and AgNW. Thanks to the unique asymmetric porous structure, the as-prepared c-MWCNT/AgNWs/PANFs hybrid film with 8 wt% of c-MWCNT and 4 wt% of AgNW remained efficient EMI shielding performance, whose shielding effectiveness (SE) and specific effectiveness (SEE/t) reached 40.59 dB and 10678.17 dB cm2 g−1 at thickness of 0.061 mm in X band, respectively. Furthermore, the shielding effectiveness and absorption coefficient could be regulated by c-MWCNT content, AgNW content, and ratio of c-MWCNT and AgNW. With improving the conductive ratio, the c-MWCNT/AgNWs/PANFs hybrid film possessed tunable shielding effectiveness between 9.40～40.59 dB and absorption coefficient between 0.028～0.303. This work provided feasible avenue for controlling electromagnetic feature through tailoring conductive blocks strategy.

Recent Advances in Zeolites-Catalyzed Biomass Conversion to Hydroxymethylfurfural: The Role of Porosity and Acidity.

Biomass is an attractive raw material for the production of fuel oil and chemical intermediates due to its abundant reserves, low price, easy biodegradability, and renewable use. Hydroxymethylfurfural (5-HMF) is a valuable platform chemically derived from biomass that has gained significant research interest owing to its economic and environmental benefits. In this review, recent advances in biomass catalytic conversion systems for 5-HMF production were examined with a focus on the catalysts selection and feedstocks' impact on the 5-HMF selectivity and yield. Specifically, the potential of zeolite-based catalysts for efficient biomass catalysis was evaluated given their unique pore structure and tunable (Lewis and Brønsted) acidity. The benefits of hierarchical modifications and the interactions between porosity and acidity in zeolites, which are critical factors for the development of green catalytic systems to convert biomass to 5-HMF efficiently, were summarized and assessed. This Review suggests that zeolite-based catalysts hold significant promise in facilitating the sustainable utilization of biomass resources.

N, O, P-doped porous carbon with high surface utilization and long cycling life for supercapacitors

The development of miniaturized and lightweight supercapacitors (SCs) becomes a hot research region. Improving the surface area utilization of porous carbon materials can effectively promote the energy density and power density of SCs. This work first constructs three-dimensional porous poly(p-phenylenediamine) hydrogel through adding phytic acid. Thereafter, N, O, P-doped porous carbon (NOPPC) was obtained via simple one-step pyrolysis treatment. The unique three-dimensional porous structure of NOPPC inherited from poly(p-phenylenediamine) hydrogel provides plentiful ion storage space and ion transportation channels. Heteroatom-doped feature endows NOPPC with good wettability and more active surface area. The surface utilization of NOPPC-800 reaches up to 2.56 F m−2, which is better than many carbon materials in literatures. NOPPC-800 can still maintain 135 F g−1 at 20 A g−1. The capacity retention ratio of NOPPC-800 can reach up to 93.4 % after 10000 cycles at 10 A g−1. The quantitative analysis of energy storage mechanism of NOPPC illustrates the synergistic impact of pore structure and doped heteroatoms. These electrochemical results show that NOPPC possesses good practical application value. NOPPC-800//NOPPC-800 supercapacitor shows high energy density and excellent cycle stability. The results show that the balance of heteroatom content, specific surface area and conductivity is the key to obtain promising carbon electrode materials and can be realized via tuning carbonization temperature. This work also demonstrates that rational structure control of carbon precursor is the effective way to promote the capacity of carbon materials.

One-step in-situ preparation of C/TiO2@rGO aerogel derived from Ti3C2Tx MXene for integrating microwave absorption, electromagnetic interference shielding and catalytic degradation of antibiotics

The worsening electromagnetic radiation and water pollution are severely threatening people's living environment. Developing multifunctional nanomaterials to reduce the electromagnetic radiation and remove the pollutants from the aqueous solutions is attracting wide interest in the field of environmental protection. Now, a multifunctional C/TiO2@reduced graphene oxide (rGO) aerogel integrating microwave absorption, electromagnetic interference (EMI) shielding and photocatalytic degradation is prepared by one-step in-situ preparation derived from Ti3C2Tx MXene. As expected, the composite exhibits excellent microwave absorption performance at an ultra-low filler loading ratio of 3 wt% with minimum reflection loss (RLmin) of −60.24 dB and effective absorption bandwidth (EAB) of 6.16 GHz. It is demonstrated that the superior microwave absorption behavior is attributed to the unique interfacial construction and porous structure as well as the synergistic effect of enhanced dielectric loss and good impedance matching. Impressively, the as-obtained samples also display a superior EMI shielding efficiency of 52.63 dB and high photocatalytic degradation efficiencies of 96.5 % and 91.6 % for antibiotic tetracycline (TC) and oxytetracycline (OTC), respectively, which reveals its multiple utility essence. Consequently, this work provides a promising multifunctional material for integrated environmental applications and offers an innovative solution to current environmental problems.

Synergy of structural engineering and dual-heteroatoms co-doping engineering boosting porous carbon toward efficient capacitive deionization

Carbon materials have drawn increasing attention as promising electrode materials for capacitive deionization (CDI) on account of their excellent conductivity and high specific surface area. Nevertheless, the practical application of conventional carbon materials has been significantly impacted by the limited desalination capacity and the slow desalination rates. Herein, a series of hierarchical porous nitrogen and sulfur co-doped carbons (PNSC-X, X = 2.5, 5, and 7.5) were successfully prepared by combining the salt template method with the dual-heteroatoms co-doping method. Benefiting from the suitable degree of graphitization, the unique hierarchical porous structure (micropores-mesopores-macropores) and the synergistic effect between the nitrogen/sulfur (N/S) dual-dopant, the optimized electrode (PNSC-5) demonstrates an abundance of active sites and rapid reaction kinetics, which are conducive to remarkably improving the CDI performance. In consequence, as a promising electrode material for CDI, the PNSC-5 exhibits excellent desalination performance (39 mg g−1 under 1.2 V), outstanding salt adsorption rate (3.23 mg g−1 min−1) and eminent stability. The CDI device with PNSC-5 as electrode shows low energy consumption and high charging efficiency during the cycle test. Furthermore, the corresponding desalination mechanism is systematically expounded by various characterization methods. This work provides a new inspiration for exploiting high-performance carbon materials for efficient electrochemical desalination.

Binder-Free MOF-Based and MOF-Derived Nanoarrays for Flexible Electrochemical Energy Storage: Progress and Perspectives.

The fast development of Internet of Things and the rapid advent of next-generation versatile wearable electronics require cost-effective and highly-efficient electroactive materials for flexible electrochemical energy storage devices. Among various electroactive materials, binder-free nanostructured arrays have attracted widespread attention. Featured with growing on a conductive and flexible substrate without using inactive and insulating binders, binder-free 3D nanoarray electrodes facilitate fast electron/ion transportation and rapid reaction kinetics with more exposed active sites, maintain structure integrity of electrodes even under bending or twisted conditions, readily release generated joule heat during charge/discharge cycles and achieve enhanced gravimetric capacity of the whole device. Binder-free metal-organic framework (MOF) nanoarrays and/or MOF-derived nanoarrays with high surface area and unique porous structure have emerged with great potential in energy storage field and been extensively exploited in recent years. In this review, common substrates used for binder-free nanoarrays are compared and discussed. Various MOF-based and MOF-derived nanoarrays, including metal oxides, sulfides, selenides, nitrides, phosphides and nitrogen-doped carbons, are surveyed and their electrochemical performance along with their applications in flexible energy storage are analyzed and overviewed. In addition, key technical issues and outlooks on future development of MOF-based and MOF-derived nanoarrays toward flexible energy storage are also offered.

Sol-Gel Functionalized Polyurethane Foam-Packed Mini-Column as an Efficient Solid Extractor for the Rapid and Ultra-Trace Detection of Textile Dyes in Water.

Textile dyes widely used in industrial products are known as a major threat to human health and water ecological security. On the other hand, sol gel represents a principal driver of the adoption of dispersive solid-phase microextractors (d-µ SPME) for pollutants residues in water. Thus, the current study reports a new and highly rapid and highly efficient hybrid sol-gel-based sponge polyurethane foam as a dispersive solid-phase microextractor (d-µ-SPME) platform packed mini-column for complete preconcentration and subsequent spectrophotometric detection of eosin Y textile dye in wastewater. The unique porous structure of the prepared sol-gel immobilized polyurethane foams (sol-gel/PUF) has suggested its use for the complete removal of eosin Y dye (EY) from water. In the mini-column, the number (N) of plates, the height equivalent to the theoretical plates (HETP), the critical capacity (CC), and the breakthrough capacities (BC) of the hybrid sol-gel-treated polyurethane foams towards EY dye were determined via the breakthrough capacity curve at various flow rates. Under the optimum condition using the matrix match strategy, the linear range of 0.01-5 µg L-1, LODs and LOQs in the range of 0.006 µg L-1, and 0.01 µg L-1 for wastewater were achieved. The intra-day and inter-day precisions were evaluated at two different concentration levels (0.05 and 5 μg L-1 of dye) on the same day and five distinct days, respectively. The analytical utility of the absorbents packed in pulses and mini-columns to extract and recover EY dye was attained by 98.94%. The column could efficiently remove different dyes from real industrial effluents, and hence the sol-gel/PUF is a good competitor for commercial applications. The findings of this research work have strong potential in the future to be used in selecting the most suitable lightweight growing medium for a green roof based on stakeholder requirements. Therefore, this study has provided a convenient pathway for the preparation of compressible and reusable sponge materials from renewable biomass for efficient removal of EY from the water environment.