Self-sacrificing Template Research Articles

Enhanced ethanol sensing performance of N-doped ZnO derived from ZIF-8

Metal oxides derived from metal-organic framework (MOF) have attracted considerable attention due to its excellent performance and unique structure. Doping is considered as an effective method to improve gas-sensing performance. However, nonmetal doped metal oxides derived from MOF as gas-sensing materials have not been reported. Within this work, N atoms were successfully doped into the lattice of ZnO nanoparticles using ZIF-8 as a self-sacrificial template through a thermal treatment process with the assistant of urea. The obtained N-ZnO exhibited competitive ethanol-sensing performance, in which the response value of N-ZnO-5 to 100 ppm ethanol reached 115 at 190 °C with a satisfactory selectivity. It was found that the N-doping in ZnO facilitated the formation of oxygen vacancy that promoted the generation of adsorbed oxygen species to achieve the enhanced gas-sensing performance. Besides, the larger specific surface area resulting from the size reduction during the urea-assisted pyrolysis process can also be responsible for the improving of the ethanol-sensing performance.

3-Aminopropyltriethoxysilane functionalized ZnO materials for improving the gas sensitivity to 2-butanone

In recent years, researchers have discovered that self-assembled monolayer functionalized surfaces could improve the gas-sensing performance of semiconductor oxide-based sensors. In the present work, metal-organic framework material ZIF-8 was selected as the self-sacrificial template, and then ZIF-8 materials were calcined at a high temperature to obtain ZnO nanoparticles. Subsequently, the surface of ZnO was modified to install a single layer of 3-aminopropyltriethoxysilane (APTES). In comparison with the pure ZnO-based sensor, the sensor based on 0.5 vol% APTES/ZnO had higher response to 2-butanone. The response has remarkably improved mainly due to APTES molecules capture electrons from the surface of ZnO to widen the electron depletion layer. In addition, the amine (–NH2) group of the APTES monolayer enhanced the specific interaction between the sensing material and 2-butanone, thereby the performance of the sensor was improved. After functionalization with 0.5 vol% APTES, the lower detection limit of the sensor reached as low as 200 ppb, while that of the pure ZnO-based sensor was 500 ppb.

Preparation of Cs/Cu-LDO@X catalysts and reaction mechanism of the side-chain alkylation of toluene to styrene

The Cu-LDH@X composite materials were synthesized using the in-situ self-sacrificial template method, and the acid-base bifunctional Cs/Cu-LDO@X catalysts were prepared by impregnation-calcination. The as-synthesized catalysts were characterized by XRD, N2 adsorption-desorption, SEM, HRTEM (EDS), FTIR, XPS, NH3-TPD, CO2-TPD techniques. The catalytic performance of the catalysts was evaluated in one step by implying a fixed-bed microreactor for the side-chain alkylation of toluene with methanol to styrene. The reaction mechanisms of the side-chain alkylation on the catalysts surface were deeply investigated. The Cs/Cu-LDO@X catalysts with adjustable acid-base sites and nanolayered structures demonstrated good catalytic performance for the side-chain alkylation of toluene. The Cs/Cu-LDO@X-3 catalyst exhibited the best catalytic performance with toluene conversion is up to 6.58%, while the selectivity of side-chain alkylated products and styrene is 91.64% and 54.16% respectively. The reaction mechanism investigation indicates that methanol dehydrogenated firstly to form formaldehyde under the action of the base sites on the catalyst surface, later, the adsorbed toluene on the acid sites underwent side-chain alkylation with formaldehyde. High selectivity of produced styrene owing to the synergistic interactions of acid-base sites and layered space-confined effects of the catalytic system.

Metal-organic frameworks-derived In2O3 microtubes/Ti3C2Tx MXene composites for NH3 detection at room temperature

Metal organic frameworks (MOFs) have gained intensive concern in gas sensors owing to their features of well-controlled morphologies and shared metal site. In this article, the hollow In2O3 microbutes were successfully anchored on the surface of exfoliated Ti3C2Tx MXene through a self-sacrificial template treatment and subsequent calcination strategy. The surface morphology and elemental composition features of as-obtained MOFs-derived In2O3/Ti3C2Tx MXene products were analyzed via a battery of characterization strategies. In2O3 microbutes (with an average length around 2–5 µm) as an active center component were riveted to the appearance of Ti3C2Tx MXene. Gas-sensing measurements demonstrated that the response of the present gas sensor is 60.6% for 5 ppm NH3 gas at RT of 25 ℃ (24.8% relative humidity), and the detection limit is as low as 5 ppm. Additionally, the MOFs-derived In2O3/Ti3C2Tx MXene sensor illustrated excellent linear response (R2 = 0.9785) within a certain scale (5–100 ppm), ultra-fast response/recovery rate (3/2 s), outstanding selectivity, good reversibility and strong long term stability. It is confirmed through theoretical and experimental perspectives that this work is expected to serve as a valuable reference for the designed high performance NH3 sensor in practice.

Role of gelatin and chitosan cross-linked aqueous template in controlling the size of lithium titanium oxide

Significant safety advantages of lithium titanium oxide (LTO) over currently used graphite for lithium-ion batteries have been attracting scientists to develop novel synthetic methods of this anode material in order to combine with another cathode. This study utilizes self-sacrificing cross-linked aqueous templates of gelatin and chitosan polymer to control lithium titanium oxide (LTO) morphology and microstructure. Gelatin and chitosan self-assembled aqueous template containing LTO precursors has been evaporated at 110 °C and then calcined at 750 °C in a muffle furnace to synthesize white color LTO powder. Various techniques such as X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Energy dispersive x-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy and UV–visible spectroscopy were used to characterize the synthesized LTO powders. Both XRD and EDS spectrum confirm the coating of gelatin and chitosan derived carbon species on the surface of LTO materials. The detailed characterization reveals that increasing the amount of gelatin to the mass ratio of gelatin and chitosan reduced LTO particle sizes. Thus, a size controlled carbon coating LTO preparation strategy have been established via gelatin and chitosan cross-linked aqueous template in controlling the morphology and microstructure of LTO material.

Carbon Nanotubes Interconnected NiCo Layered Double Hydroxide Rhombic Dodecahedral Nanocages for Efficient Oxygen Evolution Reaction.

Proper control of a 3d transition metal-based catalyst with advanced structures toward oxygen evolution reaction (OER) with a more feasible synthesis strategy is of great significance for sustainable energy-related devices. Herein, carbon nanotube interconnected NiCo layered double hydroxide rhombic dodecahedral nanocages (NiCo-LDH RDC@CNTs) were developed here with the assistance of a feasible zeolitic imidazolate framework (ZIF) self-sacrificing template strategy as a highly efficient OER electrocatalyst. Profited by the well-fined rhombic dodecahedral nanocage architecture, CNTs’ interconnected characteristic and structural feature of the vertically aligned nanosheets, the as-synthesized NiCo-LDH RDC@CNTs integrated large exposed active surface areas, enhanced electron transfer capacity and multidimensional mass diffusion channels, and thereby collaboratively afforded the remarkable electrocatalytic performance of the OER. Specifically, the designed NiCo-LDH RDC@CNTs exhibited a distinguished OER activity, which only required a low overpotential of 255 mV to reach a current density of 10 mA cm−2 for the OER. For the stability, no obvious current attenuation was detected, even after continuous operation for more than 27 h. We certainly believe that the current extraordinary OER activity combined with the robust stability of NiCo-LDH RDC@CNTs enables it to be a great candidate electrocatalyst for economical and sustainable energy-related devices.

Self-Sacrifice Template Construction of Uniform Yolk-Shell ZnS@C for Superior Alkali-Ion Storage.

Secondary batteries have been widespread in the daily life causing an ever‐growing demand for long‐cycle lifespan and high‐energy alkali‐ion batteries. As an essential constituent part, electrode materials with superior electrochemical properties play a vital role in the battery systems. Here, an outstanding electrode of yolk–shell ZnS@C nanorods is developed, introducing considerable void space via a self‐sacrificial template method. Such carbon encapsulated nanorods moderate integral electronic conductivity, thus ensuring rapid alkali‐ions/electrons transporting. Furthermore, the porous structure of these nanorods endows enough void space to mitigate volume stress caused by the insertion/extraction of alkali‐ions. Due to the unique structure, these yolk–shell ZnS@C nanorods achieve superior rate performance and cycling performance (740 mAh g−1 at 1.0 A g−1 after 540 cycles) for lithium‐ion batteries. As a potassium‐ion batteries anode, they achieve an ultra‐long lifespan delivering 211.1 mAh g−1 at 1.0 A g−1 after 5700 cycles. The kinetic analysis reveals that these ZnS@C nanorods with considerable pseudocapacitive contribution benefit the fast lithiation/delithiation. Detailed transmission electron microscopy (TEM) and X‐ray diffraction (XRD) analyses indicate that such yolk–shell ZnS@C anode is a typical reversible conversion reaction mechanism accomplished by alloying processes. This rational design strategy opens a window for the development of superior energy storage materials.

MOFs-derived Co-doped In2O3 hollow hexagonal cylinder for selective detection of ethanol

Shape controlled preparation and doping are important means to improve the gas sensitivity of metal oxide semiconductor materials. In this work, pure and Co-doped In2O3 porous hollow hexagonal cylinders were successfully prepared using metal–organic frameworks (MOFs) MIL-68(In) as self-sacrificial template. The size of the MIL-68(In) hexagonal cylinder is uniform, and the In2O3 obtained after pyrolysis better inherits the shape of the MIL-68(In), but becomes hollow, and the cylinder surfaces are porous. The product has a large specific surface area (46.52 m2/g), and the doping of Co significantly increases the oxygen vacancy of the material. The Co-doped sample obtained by pyrolysis at 500℃ has excellent gas sensing performances to ethanol gas, its sensitivity to 100 ppm ethanol gas at 210 ℃ is 14.6, response/recovery time is 21 s and 107 s, and the sensing selectivity to ethanol is also good.

Hollow Capsule NiCo2 NS Prepared by Self-Sacrificing Template Method for High-Efficiency Bifunctional Catalyst and Its Application in Zn-Air Battery.

Exploring the application of high-efficiency bifunctional oxygen catalysts to rechargeable zinc-air batteries has been a research hotspot in recent years. We succeeded in obtaining NiCo2 NS with a hollow capsule structure through the self-sacrificing template method, which has a larger specific surface area and can provide more active sites for electrocatalysis relative to his solid. The introduction of S can change the valence distribution of N and the electronic structure of the M-N bond, so that NiCo2 NS exhibits excellent performance in the overpotential and stability of the oxygen reduction and oxygen evolution reactions. It shows an overpotential of 154 mV at 10 mA cm-2 and a half-wave potential of 0.76 V. When used as a bi-functional catalyst in zinc-air batteries, it exhibits good stability within 400 h. The flexible battery assembled by NiCo2 NS also shows excellent performance, and can be cycled stably for 20 h. The current maintains good stability when it is bent at different angles during the cycle.

MOFs-derived self-sacrificing template strategy to double-shelled metal oxides nanocages as hierarchical interfacial catalyst for suppressing smoke and toxic gases releases of epoxy resin

• Hierarchical interfacial catalysts (Co3O4/Co3O4; Co3O4/NiCo2O4 DSNCs) are designed. • Efficient removal of smoke and toxic gases are obtained after their low additions. • Flame retardancy comparison with reported works strongly affirms their superiorities. • Satisfactory promotions in mechanical property are acquired. The emission of considerable smoke and toxic gases has been the notorious stumbling block on the extended usage of epoxy resin (EP), which often causes serious fire casualties in real fire. Hence, metal organic frameworks (MOFs)-derived self‐sacrificing template strategy is adopted, to prepare metal oxides double-shelled nanocages (Co 3 O 4 /Co 3 O 4 and Co 3 O 4 /NiCo 2 O 4 DSNCs) as hierarchical interfacial catalysts for suppressing the releases of smoke and toxic gases. With the addition of 2.0 wt% Co 3 O 4 /Co 3 O 4 DSNCs, the peak smoke production rate (PSPR), total smoke production (TSP), peak CO production rate (PCOP) and total CO production (TCOP) are reduced by 15.8%, 46.9%, 36.2% and 49.1%, separately. When 2.0 wt% Co 3 O 4 /NiCo 2 O 4 DSNCs is incorporated, the PSPR, TSP, PCOP and TCOP are markedly decreased by 40.8%, 55.5%, 46.6% and 48.5%, respectively. These results strongly corroborate the efficacy of DSNCs in suppressing the emission of smoke and toxic CO gas. Additionally, the values of peak heat release rate are reduced by 15.9% and 28.4%, reflecting the inhibited heat release. Flame retardancy comparison with reported works corroborates the prominent merit of DSNCs in inhibiting the smoke release. The clear evidence for suppressed toxic CO and NO gases releases is also acquired from TG-IR test. Profiting from the well-formed nanoflake-polymer interfaces, the mechanical performance is obviously improved. In short, these designed DSNCs possess great efficacy in smoke as well as toxic gases removal and mechanical enhancement of EP. This investigation may provide useful inspirations for designing MOFs-derived hierarchical interfacial catalysts, towards impairing the fire toxicity of polymer.

Enhanced adsorption performance of subordinate magnesium sites in pinhole magnesium oxide nanosheets with rich oxygen vacancies

Phosphorus recovery from wastewater is important for protecting the aquatic environment and achieving sustainable development. However, as a typical phosphorus adsorbent, nanoscale magnesium oxide (MgO) exhibits aggregation and limited adsorption ability. Herein, melamine foam (MF) was selected as a self-sacrifice template to prepare an oxygen-vacancy-rich MgO/MF phosphate adsorbent with high dispersion and a multistage pore structure. Density-functional theory calculations reveal that the phosphate preferentially adsorbed on the hollow sites rather than top sites of MgO when there were oxygen vacancies, which improved the intrinsic adsorption ability of MgO/MF. The MgO/MF adsorbent exhibited excellent phosphorus removal from water within a wide pH range of 2–12; the maximum adsorption capacity of phosphate was as high as 1226 ​mg/g. The adsorption capacity of the MgO/MF adsorbent after phosphate adsorption was reactivated to ca. 100%. After six adsorption cycles, MgO/MF with a high phosphate content of 117.5 ​mg ​P/g is a potential high-quality fertilizer. This work provides a promising strategy for constructing an efficient adsorbent for wastewater treatment and resource recovery.

The Composite-Template Method to Construct Hierarchical Carbon Nanocages for Supercapacitors with Ultrahigh Energy and Power Densities.

3D hierarchical carbon nanocages (hCNC) are becoming new platforms for advanced energy storage and conversion due to their unique structural characteristics, especially the combination of multiscale pore structure with high conductivity of sp2 carbon frameworks, which can promote the mass/charge synergetic transfer in various electrochemical processes. Herein, the MgO@ZnO composite-template method is developed to construct hCNC and nitrogen-doped hCNC (hNCNC), which integrates the advantages of the in situ MgO template method and ZnO self-sacrificing template method. The hierarchical MgO template provides the scaffold for depositing carbon nanocages, while the self-sacrificing ZnO template helps create abundant micropores while promoting the graphitization degree, so that the microstructures of the products are effectively regulated. The optimized hCNC and hNCNC have an increased specific surface area and conductivity, which can further boost the mass/charge synergetic transfer. As the electrode materials of supercapacitors, the optimal hCNC(hNCNC) exhibits a high specific capacitance of 281(348)Fg-1 in KOH and 276(297)Fg-1 in EMIMBF4 electrolytes at 1Ag-1 . The ultrahigh energy and power densities are realized, accompanied by a high-rate capability and long cycling stability. The record-high energy densities of 141.8-71.4Whkg-1 are achieved in EMIMBF4 at power densities of 10.0-250.4kWkg-1 .

Block Copolymer Self-Assembly Guided Synthesis of Mesoporous Carbons with In-Plane Holey Pores for Efficient Oxygen Reduction Reaction.

In this paper, a simple approach, using interfacial self-assembly of block copolymers (BCPs) on self-sacrificial templates, for preparing mesoporous carbons with in-plane holey pores, including nitrogen atom-doped carbon nanosheets and nanoflowers (denoted as NHCSs and NHCFs), is reported. The approach employs sheet- or flower-like layered double hydroxide as the templates, P123 copolymer as the pore-directing agent, and m-phenylenediamine as the carbon source. The holey mesopores may shorten the mass transfer distance in the internal active sites of stacked nanosheets, while the 3D packing mode of nanosheets can reduce pore blockage caused by their tight stacking. Profiting from these structural advantages, acting as electrocatalysts for oxygen reduction reaction (ORR), both NHCSs and NHCFs show excellent catalytic performance better than that of carbon nanosheets without holey pores. Particularly, NHCFs exhibit a high half-wave-potential (0.82V) anda limiting current density (5.4mAcm-2 ), close to those of commercial Pt-C catalysts. This study provides valuable clues on building mesoporous materials with in-plane holey pores as well as on the effect of pore structure and stacking mode of 2D materials on their electrocatalytic ORR performance.

Controllable In Situ Transformation of Layered Double Hydroxides into Ultrathin Metal-Organic Framework Nanosheet Arrays for Energy Storage.

Ultrathin two-dimensional metal-organic frameworks (MOFs) have convincing performances in energy storage, which can be put down to their accessible active sites with rapid charge transfer. Herein, NiCo-layered double hydroxide (LDH) nanosheet arrays are used as self-sacrificial templates to in situ fabricate ultrathin NiCo-MOF nanosheet arrays on Ni foam (NS/NF) by using organic ligands without adding metal sources. Two ultrathin MOF nanosheets with different ligands, terephthalate (BDC) and 2-aminoterephthalate (NH2-BDC), are synthesized, characterized, and discussed in detail. Specifically, NiCo-NH2-BDC-MOF NS/NF exhibits the best electrochemical performance as a battery-type electrode for supercapacitors, achieves an areal capacitance of 12.13 F cm-2 at a current density of 2 mA cm-2, and retains the original capacitance of 73.08 % after 5000 cycles at a current density of 50 mA cm-2. Furthermore, when NiCo-NH2-BDC-MOF NS/NF is assembled with activated carbon (AC) to form an asymmetric supercapacitor (ASC), an energy density of 0.81 mWh cm-2 can be provided at a power density of 1.60 mW cm-2. These results offer an effective and controllable synthetic strategy to in situ prepare ultrathin MOF nanosheet arrays with different ligands and metal ions from LDH precursors.

Hollow multi-dimension CoCeS/C as peroxymonosulfate activator toward ofloxacin degradation via coexisting free radical and nonradical pathways

A catalyst with multi-metal introduction and a hollow structure is very promising for peroxymonosulfate (PMS) activation. In this study, Ce doped hollow bimetallic sulfide carbon composite (CoCeS/C) were fabricated from three dimensional layered double hydroxides (LDHs), which was synthesized via metal-organic frameworks (MOFs) self-sacrificial template strategy. The as-synthesised composite was applied to the catalytic degradation of ofloxacin (OFX) and the result indicated that the reaction rate constant (k2) of Ce doped CoCeS/C (18.539 mmol−1·L·min−1) was about 5.7 times higher than CoS/C (3.230 mmol−1·L·min−1) which was without Ce doping. Singlet oxygen (1O2) and SO4-• were verified as the dominant reactive oxygen species (ROS) responsible for OFX via quenching tests and electron paramagnetic resonance spectroscope (EPR). The catalyst kept high removal efficiency over the pH range of 3.0–11.0. In addition, the catalyst still showed good reusability after four runs, as well as strong resistance to versatile inorganic ions and background organic matters in the oxidative treatment of OFX. Finally, degradation pathways were proposed by analyzing the degradation intermediates. These results revealed that the designed CoCeS/C catalyst exhibits wide promising application prospects for the degradation of organic residues in environmental remediation.

Enhanced thermal performance of phase change materials supported by hierarchical porous carbon modified with polydopamine/nano-Ag for thermal energy storage

In order to solve the problem of low thermal conductivity of hierarchical porous carbon-based (HPC) composite phase change materials, a new method was proposed in this paper, in which HPC was modified with polydopamine (PDA) and silver nanoparticles successively, and then incorporated with polyethylene glycol (PEG) to form shape-stabilized phase change composite material (SSPCM). The HPC was prepared by self-sacrificing template method using sucrose and sodium bicarbonate as starting materials. The micro structure, thermal conductivity, thermal stability, chemical compatibility and Photo-thermal conversion capability of the SSPCM were analyzed. The results showed that the SSPCM prepared from the support material modified by PDA and silver nanoparticles still had good chemical compatibility. Besides, the thermal conductivity of SSPCM was significantly improved by 58% compared to the original material, showing superior thermal properties. It was worth noting that the photo-thermal conversion capability of the SSPCM was significantly higher than that of the original material. The SSPCM synthesized on the basis of functionalized hierarchical porous carbon had promising applications in photo-thermal conversion and thermal energy storage and transformation.

CeO2 quantum dots embedded in 3D hierarchical porous foliaceous N-doped carbon as an efficient oxygen reduction electrocatalyst for metal-air battery

The development of large-scale and highly efficiency catalysts towards oxygen reduction reaction (ORR) is of great significance for the wide application of metal–air batteries. In this work, we propose a self-sacrifice template method combined with in-situ composite technique to fabricate a novel configuration of CeO2 quantum dots embedded in hierarchical porous foliaceous N-doped carbon with both mesopores and micropores. The prepared catalyst exhibits prominent ORR electrocatalytic performance with higher half-wave potential, lower Tafel slope, and enhanced durability comparing with the commercial Pt/C catalyst. Furthermore, the Zn-air and Al–air batteries employing the prepared electrocatalysts in cathodes exhibit superior discharge performance with high open circuit voltages of 1.51 V and 1.76 V, and peak power densities of 204 and 458 mW cm−2, respectively, compared to most reported metal–air batteries. The greatly enhanced electrocatalytic performance can be ascribed to the abundant oxygen vacancies, improved redox property of Ce3+/Ce4+ as well as the three-dimensional hierarchical porous structure. This work provides a valuable chance to develop scalable quantum dot level composite catalysts in metal–air batteries.

Bimetallic catalyst derived from copper cobalt carbonate hydroxides mediated ZIF-67 composite for efficient hydrogenation of 4-nitrophenol

4-nitrophenol (4-NP), a toxic pollutant, is ubiquitous in the environment and difficult to degrade in natural conditions. To deal with this contaminant, catalytic reduction of 4-NP is a promising way. Herein, we report a copper and cobalt nanoparticle decorated carbon framework (Cu/Co@CF) through a self-sacrificial template method derived from the copper cobalt carbonate hydroxides/zeolitic imidazolate framework-67 (CuCoCH/ZIF-67) composite. Served as a cobalt and copper source as well as a self-sacrificial template, CuCoCH extended the pore sizes of carbonized derivatives of ZIF-67 and synchronously transformed to bimetallic active sites. The catalyst exhibited a highly efficient catalytic performance and remarkable reusability for hydrogenation of 4-NP. The 4-NP conversion reached 99.7% in 1 min and the pseudo-first-order reaction kinetic constant was 5.122 min-1, which is the highest among similarly reported catalysts.

A diatomite-template self-sacrificing route for Mg-chlorite and its adsorption behavior towards Pb(II)/Cd(II)

Heavy metal pollution has caused worldwide attention due to its toxicity to people's health. It's necessary to design and synthesize adsorbents with excellent adsorption performance in low cost. In this work, diatomite is adopted as a self-sacrificing template for the synthesis of adsorbent Mg-chlorite. The three-dimensional (3D) hierarchical porous Mg-chlorite perfectly inherits structure characters from diatomite and exhibits a high specific surface area of 337 m2/g. The maximum adsorption capacities of Mg-chlorite towards Pb(II) and Cd(II) reach 961 mg/g and 506 mg/g, respectively, higher than that of the referenced adsorbents. The Pb(II), Cd(II) adsorption onto Mg-chlorite is a monolayer exothermic process. Chemisorption mainly controls the adsorption rate, in which mass transfer exerts greater influence than intra-particle-diffusion. Electrostatic attraction, chemisorption and co-precipitation are involved in the adsorption process, and co-precipitation mainly contributes to the excellent adsorption performance according to XRD, FT-IR and XPS analysis. This study provides a novel diatomite-template self-sacrificing method in the synthesis of 3D hierarchical porous magnesium silicate. The excellent adsorption performance for Pb(II) and Cd(II) species makes the low cost Mg-chlorite a great potential in the application of practical environment remediation.

Efficient capture of ornidazole through cobalt/zinc-containing naonoporous carbons derived from cobalt/zinc-based MOF-74

Ornidazole (ONZ) capture from water is one of thorny difficulties for water purification. To solve this issue, a series of novel interconnected nano-porous carbons (NPCs) with high adsorption activities toward ONZ has been firstly developed via direct carbonization of Zn-(MOF-74), Co-(MOF-74), and Zn/Co-(MOF-74) self-sacrifice templates. Textural properties of as-prepared NPCs were proven and compared by XRD, SEM, XPS, and N2 adsorption, etc. The extraordinary 3D porous structure thus fabricated significantly enhanced ONZs capture ability. Inspiring, we observed that Zn/Co-NPC exhibited extraordinarily high ONZs capture capacity as a result of synergistic effects of electrostatic interactions, hydrogen bonding, coordination, and π-π conjugation, displaying a maximum ONZs uptakes capacity of 320 ​mg/g. Moreover, the ONZs capture ability over our prepared NPCs only underwent a slight change after the fifth reuse. Overall, this novel NPC exhibits a promising practical application for ONZs capture from aqueous solutions.