Metal-organic Framework Templates Research Articles

Construction of hierarchical Co9S8@NiO synergistic microstructure for high-performance asymmetric supercapacitor

Metal-organic frameworks (MOFs) become a research hot-spot owing to their unique properties originating from the ultra-high porosity and large specific surface area with highly accessible active sites. However, the electrochemical performance of a single component is unsatisfied when MOFs are applied as electrode material in a supercapacitor. In this work, the hierarchical hollow framework involving interconnected Co9S8 structure and NiO nanosheets (Co9S8@NiO) are successfully prepared by MOFs derived methods and proposed to electrode materials. As a result, the prepared Co9S8@NiO electrode materials exhibit a superior specific capacitance of 1627 F g−1 at a current density of 1 A g−1. Moreover, an assembled hybrid supercapacitor shows a high energy density of 51.65 Wh Kg−1 at a power density of 749.8 W Kg−1 as well as excellent long-term cycling stability with 81.79% capacity retention after 10,000 cycles. Meanwhile, we concluded that the marvelous electrochemical performance is closely associated with the unique structure of NiO, in particular, the nanosheet surface provides a superior specific surface area and rich accessible redox reaction sites, thus enlarged the contact between the surface and interface of the electrode material. Finally, two supercapacitor devices connected in series can light up four light-emitting diodes (LEDs) for about 30 min. Hence, the presented strategy represents a general route for supercapacitor electrode material with promising electrochemical performance, which can combine the MOFs template and other hierarchical nanosheets together.

Hierarchical CeO2@N-C Ultrathin Nanosheets for Efficient Selective Oxidation of Benzylic Alcohols in Water.

A monodisperse CeO2@N-C ultrathin nanosheet self-assembled hierarchical structure (USHR) has been prepared by metal-organic framework template methods. The uniform coating of nitrogen-doped carbon (N-C) layers could play an important role in the adsorption and activation of benzylic alcohol. The unique 3D hierarchical structure self-assembled by ultrathin nanosheets provided enough active sites for the catalytic reaction. Therefore, the CeO2@N-C USHR can afford excellent catalytic performance for selective oxidation of benzylic alcohols in water.

Electrophoretic deposition of metal-organic framework derived porous copper oxide anode for lithium and sodium ion rechargeable cells

This article demonstrates the applicability of electrophoretically fabricated CuO-carbon black (CB) film as negative electrodes for lithium and sodium-ion rechargeable cells. CuO powder is derived from a thermally decomposed copper metal-organic framework (MOF) template. Electrophoretic deposition (EPD) of CuO-CB electrode has been carried out from a stable CuO-CB suspension, which is prepared in isopropanol medium containing polyacrylic acid and nickel nitrate as dispersant and charging agent respectively. The obtained EPD films are found to be porous and strongly adherent to underlying current collector, with a uniform distribution of CB and CuO. These films are observed to retain a reversible specific capacity of 500 mA h g−1 at 0.5 A g−1 and 256 mA h g−1 at 0.1 A g−1 after 100 cycles as Li-ion battery and Na-ion battery anode respectively. The uniformly dispersed CuO within the conductive network of CB particles is found to sustain the high-rate battery operations efficiently and exhibit a specific capacity of 265 mA h g−1 at 5 A g−1 (LIB) and 140 mA h g−1 at 3 A g−1 (SIB). Owing to the simple and cost-effective route for fabricating these negative electrodes, electrophoretically deposited CuO-CB porous film proves to be a suitable candidate for high-rate Li-ion and Na-ion batteries.

Controlled Metal Oxide and Porous Carbon Templation Using Metal-Organic Frameworks

Templated porous carbons are promising due to their robust chemical and thermal properties. However, investigations into the formation mechanisms and structure–property relationships are limited. We report a systematic study of the carbonization of two metal-organic frameworks (MOFs) with varying connectivities and metal centers to determine how the resulting porous carbon structure is affected by temperature and gas environment. Surface area analysis reveals that the porosity depends on the number of residual carbon species, while diffraction analysis shows the strong effect of carbonization temperature on the resulting metal oxide phase. A higher connectivity parent MOF also indicates a more controllable and typically higher-surface-area porous carbon. This effect is especially noticeable when coordinating gases are used as the calcination environment, suggesting that a kinetically controlled decoordination event is responsible for reducing the carbon surface area. Neutron total scattering and pair distribution function (PDF) analysis showed that larger carbon domain sizes also cause higher surface areas, which indicates that the formation of domains within the materials promotes rigid backbones and aids in the production of high surface areas. PDF analysis showed that the MOF template could also be used to maintain the symmetry of the parent cluster in the resulting carbon, with the Zr6O4(OH)4 of UiO-66 forming the cubic phase of the metal oxide.

Current Trends in Metal-Organic and Covalent Organic Framework Membrane Materials.

Metal–organic frameworks (MOFs) and covalent organic frameworks (COFs) have been thoroughly investigated with regards to applications in gas separation membranes in the past years. More recently, new preparation methods for MOFs and COFs as particles and thin‐film membranes, as well as for mixed‐matrix membranes (MMMs) have been developed. We will highlight novel processes and highly functional materials: Zeolitic imidazolate frameworks (ZIFs) can be transformed into glasses and we will give an insight into their use for membranes. In addition, liquids with permanent porosity offer solution processability for the manufacture of extremely potent MMMs. Also, MOF materials influenced by external stimuli give new directions for the enhancement of performance by in situ techniques. Presently, COFs with their large pores are useful in quantum sieving applications, and by exploiting the stacking behavior also molecular sieving COF membranes are possible. Similarly, porous polymers can be constructed using MOF templates, which then find use in gas separation membranes.

Cobalt tungsten phosphide with tunable W-doping as highly efficient electrocatalysts for hydrogen evolution reaction

It has been of interest in seeking electrocatalysts that could exercise equally high-efficient and durable hydrogen evolution upon nonselective electrolytes in both acidic and alkaline environments. Herein, we report a facile strategy to fabricate cobalt tungsten phosphides (CoxW2−xP2/C) hollow polyhedrons with tunable composition based on metal-organic frameworks (MOFs) template method. By the deliberate control of W doping, the synthesized catalyst with the composition of Co0.9W1.1P2/C is found to be able to achieve a current density of 10 mA·cm−2 at overpotentials of 35 and 54 mV in acidic and alkaline media, respectively. This combined electrochemical property stands atop the state-of-the-art electrocatalyst counterparts. To unveil the peculiar behavior of the structure, density functional theory (DFT) calculation was implemented and reveals that the surface W-doping facilitates the optimization of hydrogen absorption free energy (ΔGH*) as well as the thermodynamic and kinetics barriers for water dissociation, which is coupled with the hollow structure of Co-W phosphides, leading to the prominent HER catalytic performance.

Metal-organic frameworks derived spinel NiCo2O4/graphene nanosheets composite as a bi-functional cathode for high energy density Li–O2 battery applications

Electrode materials having a combined heterostructure morphology can boost the electrochemical performance of energy conversion and storage applications. In this paper, we prepared three-dimensional (3D) porous NiCo2O4 dodecahedron nanosheets (NCO) from a metal–organic framework template (ZIF-67) and incorporated them with two-dimensional (2D) multilayer graphene nanosheets (GNS) through a simple and rapid ultrasonication process. The combination of these 3D/2D nanostructures created effective interfaces between the NCO and GNS components that enhanced the intrinsic electronic properties and increased the number of active catalytic sites on the NCO@GNS surfaces. Accordingly, the NCO@GNS electrocatalyst displayed superior kinetics for both the oxygen reduction and evolution reactions in both aqueous and non-aqueous electrolytes and could be fabricated into an air-cathode for Li–O2 battery applications. The NCO@GNS air-cathode delivered a specific storage capacity (7201 mA h g−1) higher than those of the NCO and commercial carbon black electrodes. We tested the durability of the Li–O2 battery featuring the NCO@GNS cathode in a new PAT-cell configuration; it exhibited long-term cyclability for 200 cycles with a limited capacity of 500 mA h g−1 at a current density of 100 mA g−1. This cathode design featuring meso- and micropores shortened the pathways for Li+ ion diffusion and ensured rapid electron and oxygen transfer, thereby increasing the lifetime of its corresponding Li–O2 battery.

MOF-derived porous carbon nanofibers wrapping Sn nanoparticles as flexible anodes for lithium/sodium ion batteries

Facile synthesis of flexible electrodes with high reversible capacity plays a key role in meeting the ever-increasing demand for flexible batteries. Herein, we incorporated Sn-based metal-organic framework (Sn-MOF) templates into crosslinked one-dimensional carbon nanofibers (CNFs) using an electrospinning strategy and obtained a hierarchical porous film (Sn@C@CNF) after a carbothermal reduction reaction. Merits of this modification strategy and its mechanism in improving the electrochemical performance of Sn nanoparticles (NPs) were revealed. Electrospun CNFs substrate ensured a highly conductive skeleton and excellent mechanical toughness, making Sn@C@CNF a self-supported binder-free electrode. Serving as a self-sacrificing template, Sn-MOF provided Sn NPs and derived into porous structures on CNFs after pyrolysis. The hierarchical porous structure of the carbon substrate was beneficial to enhancing the Li+/Na+ storage of the active materials, and the carbon wrappings derived from polyacrylonitrile (PAN) nanofibers and the MOF skeleton could jointly accommodate the violent volume variation during cycling, enabling Sn@C@CNF to have excellent cycle stability. The Sn@C@CNF anode exhibited a stable discharge specific capacity of 610.8 mAh g−1 under 200 mA g−1 for 180 cycles in lithium ion batteries (LIBs) and 360.5 mAh g−1 under 100 mA g−1 after 100 cycles in sodium ion batteries (SIBs). As a flexible electrode, Sn@C@CNF demonstrated a stable electromechanical response to repeated ‘bending-releasing’ cycles and excellent electrochemical performance when assembled in a soft-pack half-LIB. This strategy provided promising candidates of active materials and fabrication methods for advanced flexible batteries.

Green synthesis of ternary carbon dots (CDs)/MIL-88B (Fe)/Bi2S3 nanocomposite via MOF templating as a reusable heterogeneous nanocatalyst and nano-photocatalyst

An environmentally friendly heterogeneous ternary carbon dots (CDs)/MIL-88B (Fe)/Bi2S3 nanocomposite was synthesized by a multistep method. In this study, we have studied low-temperature calcination with relatively inexpensive reactants. The sufficient CD arrays were generated by loading the glucose molecules into the pores of an as-obtained metal-organic framework (MOF), i.e. MIL-88B (Fe)), by heating to 200 °C. Fabricated nanocomposite structures were characterized by FT-IR, XRD, EIS, SEM, TEM, BET, and TGA techniques, demonstrating the decoration of the Bi2S3 on the CDs/MIL-88B (Fe) nanocomposite surface. MOF templating has been chosen as a systemic method for limited size CD formation inside MIL-88B (Fe) pores. The CD arrays also revealed an excellent efficacy for catalytic and photocatalytic applications. According to the experimental results, CDs/MIL-88B (Fe)/Bi2S3 with the highest electron-accepting and transporting properties capacity displayed the most increased activity as catalyst and photocatalyst. The catalytic and photocatalytic performance of obtained structures was investigated by reducing 4-nitrophenol (4-Nip) to 4-aminophenol (4-Amp) and decomposition of cationic Methylene Blue (MB) and anionic Acid Blue 92 (AB92) dyes under visible light irradiation, respectively. The current work exhibited CDs/MIL-88B (Fe)/Bi2S3 nanocatalyst as a potent multifunctional composite to remove organic components in the presence of reducing agents and visible light, which can be employed for wastewater treatment applications.

Porous Metal-Organic-Framework (MOF) Based Hybrid Materials for Thermoelectric Applications

Thermoelectric materials based on porous hybrid and MOFs constitute a very recent development, with many new and undiscovered phenomena for the research field. These porous Hybrid materials and MOF (Metal-Organic-Framework) films represent modern designer materials that exhibit many requirements of a near ideal and tunable future thermoelectric (TE) material. It is anticipated that especially the inherent porosity can be used advantageously in the design and simulation predictions of future thermoelectric materials. In principle, porous Hybrid and MOFs materials can comply with most of the requirements of an ideal and tunable future thermoelectric (TE) material. In contrast to traditional semiconducting bulk thermoelectric materials, porous hybrid MOF templates can be used to overcome some of the constraints of physics in bulk thermoelectric materials. These porous hybrid systems are amenable for simulation and modeling to design novel optimized electron-crystal phonon-glass materials with potentially very high Figure of Merit (ZT) numbers. Porous MOF and Hybrid materials possess an ultra-low thermal conductivity, which can be further modulated by phonon engineering within their complex porous and hierarchical architecture to advance the thermoelectric figure of merit ZT. This class of novel materials offers new approaches to the design of complex and hierarchical porous structures, possessing ultra-low thermal conductivity, which are able to trap, and localize phonons, thus resulting in a new generation of thermoelectric materials with a high ZT number. This work is demonstrating recent results of MOF thermoelectric Materials and provides a future outlook to the search for the next generation thermoelectric porous Hybrid and MOF materials, which could be part of a green renewable energy revolution with novel materials of sustainable high ZT values.

In Situ Conversion of Metal-Organic Frameworks into VO2 -V3 S4 Heterocatalyst Embedded Layered Porous Carbon as an "All-in-One" Host for Lithium-Sulfur Batteries.

Although lithium-sulfur batteries exhibit a fivefold higher energy density than commercial lithium-ion batteries, their volume expansion and insulating nature, and intrinsic polysulfide shuttle have hindered their practical application. An alternative sulfur host is necessary to realize porous, conductive, and polar functions; however, there is a tradeoff among these three critical factors in material design. Here, the authors report a layered porous carbon (LPC) with VO2 /V3 S4 heterostructures using one-step carbonization-sulfidation of metal-organic framework templates as a sulfur host that meets all the criteria. In situ conversion of V-O ions into V3 S4 nuclei in the confined 2D space generated by dynamic formation of the LPC matrix creates {200}-facet-exposed V3 S4 nanosheets decorated with tiny VO2 nanoparticles. The VO2 /V3 S4 @ LPC composite facilitates high sulfur loading (70wt%), superior energy density (1022mAhg-1 at 0.2C, 100 cycles), and long-term cyclability (665mAhg-1 at 1C, 1000 cycles). The enhanced Li-S chemistry is attributed to the synergistic heterocatalytic behavior of polar VO2 and conductive V3 S4 in the soft porous LPC scaffold, which accelerates polysulfide adsorption, conversion, and charge-transfer ability simultaneously.

Hierarchical self-supporting sugar gourd-shape MOF-derived NiCo2O4 hollow nanocages@SiC nanowires for high-performance flexible hybrid supercapacitors

Rational construction of hierarchical electrode materials has been a research hotspot in the field of energy storage. In this work, metal–organic framework (MOF) derived hollow NiCo2O4 nanocages (NCs) were strung by interwoven SiC nanowires (NWs) network on carbon cloth (CC), forming a unique sugar gourd-like core–shell architecture, which were fabricated via a multi-step process containing of chemical vapor deposition, solution reaction of MOF templates, ion exchanging/etching and subsequent heat treatment. Benefiting from the unique structural advantages, such as hierarchical porous structure with abundant active sites for electrochemical reactions and interwoven conductive networks for electron transport, the formed core-shelled CC/SiCNWs@NiCo2O4NCs as a binder supercapacitor electrode exhibits excellent electrochemical performance with a large specific capacitance (1377.6F g−1 at a current density of 1 A g−1), good rate capability (68.8% capacitance retention at 20 A g−1) and excellent cycling stability (88.3% capacitance retention after 6000 cycles). Furthermore, the hybrid supercapacitor based on CC/SiCNWs@NiCo2O4NCs and activated carbon, not only delivers a high energy density of 46.58 Wh kg−1 at the power density of 800 W kg−1, but also possesses good flexibility with high capacitance retention, exhibiting the application potential in the field of flexible energy storage. More importantly, our work gives a new thinking for structural design of SiCNWs-based and MOF-based electrode materials for high-performance flexible energy storage.

Phosphate Ion-Functionalized CoS with Hexagonal Bipyramid Structures from a Metal-Organic Framework: Bifunctionality towards Supercapacitors and Oxygen Evolution Reaction.

To solve energy-related environmental problems and the energy crisis, efficient electrochemical materials have been developed as alternative energy storage and conversion systems. Abundant transition metals and their sulfides are attractive electrochemical materials. Herein, we report an efficient phosphorization strategy, which improves the overall electrochemical performance of metal sulfides. In detail, CoS hexagonal bipyramids were synthesized through simple calcination combined with in situ sulfurization of a cobalt-based metal-organic framework template, and then phosphate ion-functionalized CoS (P-CoS) was prepared through a phosphorization reaction. P-CoS exhibited outstanding electrochemical activity as both supercapacitor electrode and oxygen evolution reaction (OER) catalyst. Supercapacitors based on CoS and P-CoS as the electrodes had high specific capacitances of 304 and 442 F g-1 , respectively, and remained stable for over 10 000 cycles at 5 A g-1 . For OER, P-CoS showed a current density of 10 mA cm-2 at an overpotential of 340 mV, with a small Tafel slope. In conclusion, functionalizing CoS with phosphate ions is a promising method for enhancing chemical reactivity and accelerating ion and electron transfer.

Metal-organic frameworks derived copper doped cobalt phosphide nanosheet arrays with boosted electrochemical performance for hybrid supercapacitors

Developing highly efficient and durable battery-type materials plays key dominant function for achieving high-performance hybrid supercapacitors (HSCs). As a class of promising candidates, transition metal phosphides are largely suffering from the much lower specific capacity as compared their theoretical values as well as fast faded rate capability and durability. Herein, we report the rational design and synthesis of mesoporous Cu doped CoP (Cu:CoP) nanosheet arrays on carbon cloth, which are derived from the oxidation and phosphorization of metal-organic frameworks (MOFs) templates. We find that the introduction of Cu species in CoP matrix can greatly influence the electrochemical performance of the overall electrode. The optimized Cu:CoP electrode delivers a high specific capacity of 113.3 mAh/g at a current density of 8 A/g with much enhanced rate capability and cycling stability. The HSC device assembled by the optimized Cu:CoP and activated carbon can achieve a maximum energy density up to 31.5 Wh/kg, a maximum power density of 15.9 kW/kg as well as excellent long-term cycling stability with 90% retention after 5000 cycles. The present work demonstrates the great potentials of Cu:CoP nanosheet arrays for practical applications and provides a new avenue for the development of novel battery-type electrodes toward high-performance energy-storage systems.

An enzyme-loaded reactor using metal-organic framework-templated polydopamine microcapsule

Abstract Ultrathin polydopamine microcapsules with hierarchical structure and porosity were prepared for the immobilization of multienzymes using metal-organic framework (MOF) as the template. The multienzyme/MOF composite was first prepared using a “one-pot” co-precipitation approach via the coordination and self-assembly of zinc ions and 2-methylimidazole in the presence of enzymes. The obtained nanoparticles were then coated with polydopamine thin layer through the self-polymerization of dopamine under alkaline condition. The polydopamine microcapsules with an ultrathin shell thickness of ~ 48 nm were finally generated by removing the MOF template at acidic condition. Three enzymes were encapsulated in PDA microcapsules including carbonic anhydrase (CA), formate dehydrogenase (FateDH), and glutamate dehydrogenase (GDH). FateDH that catalyzed the main reaction of CO2 reduction to formic acid retained 94.7% activity of equivalent free FateDH. Compared with free multienzymes, the immobilized ones embedded in PDA microcapsules exhibited 4.5-times higher of formate production and high catalytic efficiency with a co-factor-based formate yield of 342%.

NiCoLDH nanosheets grown on MOF-derived Co3O4 triangle nanosheet arrays for high-performance supercapacitor

Hierarchical Co3O4@NiCoLDH nanosheets (NSs) were prepared on carbon cloth through a multistep method, containing Metal-organic frameworks (MOF)-templated thermal annealing and electrodeposition. The triangle-shaped Co3O4NSs were firstly obtained by thermal treatment of MOF templates in air. Then, ultrathin NiCoLDHNSs were in-situ electrodeposited on the surface of Co3O4NSs, constructing a core-shell structure. Benefiting the unique hierarchical structure, high conductivity of Co3O4NSs core and large surface area of NiCoLDHNSs shell, the Co3O4@NiCoLDHNSs array served as supercapacitor electrode exhibits excellent electrochemical properties, such as high specific capacitance of 1708 F g−1 (850 C g−1) at a current density of 1 A g−1, good rate capability, and excellent cycling stability. Further, the asymmetric supercapacitor assembled by Co3O4@NiCoLDHNSs and activated carbon, also displays superior electrochemical performance with high energy density and power density. Remarkably, the strategy of constructing core-shell structure based on MOF templates could be extended to other electrochemical fields.

Metal organic framework derived CoS2@Ni(OH)2 core-shell structure nanotube arrays for high-performance flexible hybrid supercapacitors

The rational design of hybrid structures which consist of multiple components with distinctive characteristics is an effective strategy for developing materials when energy storage applications. In this paper, a novel hierarchical CoS2@Ni(OH)2 core-shell nanotube array covered carbon cloth is successfully designed and synthesized for use in supercapacitors (SCs). The CoS2 nanotube (NT) arrays are synthesized using the metal organic framework template method, and serve as the scaffold for the growth of ultrathin Ni(OH)2 nanosheets via the electrodeposition process. The optimized CoS2@Ni(OH)2 hybrid electrode exhibits high specific capacity of 743 C g−1 at current density of 1 A g−1, which is nearly 5.9 times higher than that of a single CoS2 electrode. In addition, a solid state hybrid supercapacitor device is fabricated with CoS2@Ni(OH)2 hybrid electrode as positive and activated carbon as negative. The as-prepared devices deliver high energy density (29.22 W h kg−1 at 899.2 W kg−1) and high power density (8.99 kW kg−1 at 11.74 W h kg−1), as well as good cycling stability (85.5% retention of specific capacitance after 3000 cycles). The devices also display excellent flexible properties under different bending conditions. The present work shows that electrode materials with hybrid structure have considerable application prospect for flexible energy storage and conversion.

Thermoelectric porous MOF based hybrid materials

Porous hybrid materials and MOF (Metal–Organic-Framework) films represent modern designer materials that exhibit many requirements of a near ideal and tunable future thermoelectric (TE) material. In contrast to traditional semiconducting bulk TE materials, porous hybrid MOF templates can be used to overcome some of the constraints of physics in bulk TE materials. These porous hybrid systems are amenable for simulation and modeling to design novel optimized electron-crystal phonon-glass materials with potentially very high ZT (figure of merit) numbers. Porous MOF and hybrid materials possess an ultra-low thermal conductivity, which can be further modulated by phonon engineering within their complex porous and hierarchical architecture to advance the TE figure of merit (ZT). This Perspective review discusses recent results of MOF TE materials and provides a future outlook and the vision to the search for the next generation TE porous hybrid and MOF materials, which could be part of the green renewable energy revolution with novel materials of sustainably high ZT values.

In-situ synthesis of nanocomposite from metal-organic frameworks template for high-performance rechargeable batteries

Metal-organic frameworks (MOFs) as a new type of hybrid material assembled with metallic ions and organic ligands, is useful precursors or templates for the construction of various materials. MOFs derivatives show excellent performance as Li ion batteries (LIBs) electrodes or catalytic materials. Herein, we report a convenient, straightforward one-pot preparation of tin oxides nanoparticles confined in porous carbon matrices by carbonizing Sn-based MOFs. The as-prepared SnO2/SnO@C electrode show excellent cycling electrochemical and rate properties. It delivers an initial specific capacity of 1567.1 mA h g−1 at 100 mA g−1 current density as well as a remarkably enhanced cycle performance. Density functional theory (DFT) theoretical calculations, ex-situ X-ray diffraction (XRD) and X-ray photoelectron spectra (XPS) further reveal the lithium storage mechanism of SnO2/SnO@C electrodes. These results demonstrate that as-synthesized SnO2/SnO@C composite is a promising anode material for LIBs.

Ice- and MOF-templated porous carbonaceous monoliths for adsorptive removal of dyes in water with easy recycling

Various nanoporous particles, nanofibers have been employed for adsorptive removal of dyes from wastewater. However, these nanomaterials are difficult in separation from solution, generally by centrifugation or filtration. These processes are tedious and will limit the upscale applications. Herein, a hierarchically porous carbon monolith has been fabricated on grounds of ice and metal organic framework (MOF) templating method. The prepared carbonaceous monolith exhibited abundant ice-templated macropores, MOF-templated micropores and mesopores, and a high BET (Brunauer-Emmett-Teller) special surface area (530 m2 g−1). The monolith achieved an MB (methylene blue) adsorption capacity of 95.82 mg g−1 (10 mg adsorbent/5 mL aqueous dye solution) and a theoretic maximum value of 179.86 mg g−1 by the Langmuir model. Compared with MB, the adsorption capacity for MO (methyl orange) was lower. Several adsorption kinetics and isotherms models were used for analysis of adsorptive data, and the results demonstrated the adsorption of MB and MO on the porous carbon monolith is a spontaneous endothermic physisorption process, which was mainly controlled by electrostatic reaction. Importantly, the monolith could be easily picked up using tweezers and used for recycling tests. After four cycles, the 94% of the initial adsorption capacity for MB can be retained.