The effect of activation methods on the electrochemical performance of ordered mesoporous carbon for supercapacitor applications

He, Zhenni; Zhang, Guoxiong; Chen, Yuemei; Xie, Yan; Zhu, Tao; Guo, Haibo; Chen, Yigang

doi:10.1007/s10853-016-0536-x

Cited by 41 publications

(16 citation statements)

References 40 publications

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“…However, this provides us with a new method for the synthesis of mesoporous materials. Mesoporous carbon can be used as a hard template to synthesize new silica based mesoporous materials [125,126,127]. Kim et al [128] synthesized mesoporous silica (HUM-1) using CMK-1 (replicated from MCM-48) as a template.…”

Section: Synthetic Methods Of Ordered Mesoporous Metal Oxidesmentioning

confidence: 99%

Designing and Fabricating Ordered Mesoporous Metal Oxides for CO2 Catalytic Conversion: A Review and Prospect

Cui

Lian

et al. 2019

Materials

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In the past two decades, great progress has been made in the aspects of fabrication and application of ordered mesoporous metal oxides. Ordered mesoporous metal oxides have attracted more and more attention due to their large surface areas and pore volumes, unblocked pore structure, and good thermal stabilities. Compared with non-porous metal oxides, the most prominent feature is their ability to interact with molecules not only on their outer surface but also on the large internal surfaces of the material, providing more accessible active sites for the reactants. This review carefully describes the characteristics, classification and synthesis of ordered mesoporous metal oxides in detail. Besides, it also summarizes the catalytic application of ordered mesoporous metal oxides in the field of carbon dioxide conversion and resource utilization, which provides prospective viewpoints to reduce the emission of greenhouse gas and the inhibition of global warming. Although the scope of current review is mainly limited to the ordered mesoporous metal oxides and their application in the field of CO2 catalytic conversion via heterogeneous catalysis processes, we believe that it will provide new insights and viewpoints to the further development of heterogeneous catalytic materials.

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Section: Synthetic Methods Of Ordered Mesoporous Metal Oxidesmentioning

confidence: 99%

Designing and Fabricating Ordered Mesoporous Metal Oxides for CO2 Catalytic Conversion: A Review and Prospect

Cui

Lian

et al. 2019

Materials

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“…The core energy spectrum of C 1s (Figure E) can be decomposed into four different peaks, corresponding to CO/CN (284.83 eV), CN (286.28 eV), and CO (288.33 eV) bonds. , The N 1s core-level spectrum in Figure F exhibited two peaks at 399.83 and 401.78 eV, which are attributed to the two components of CNC and NH, respectively. The O 1s core-level spectrum can be decomposed into CO (531.48 eV), −OH (533.03 eV), and −COOH (535.38 eV) bonds (Figure G). The Cr 2p core-level spectrum (Figure H) of Cr 2 O 3 NPs showed that there were three different states of chromium in Cr 2 O 3 NPs, including the Cr metallic bond (574.28 eV), , CrO 3 (589.28 eV), , and Cr 2 O 3 (576.38, 577.08, 579.83, 584.38, and 586.73 eV). − According to the Cr 2p signal, the ratios of Cr 2 O 3 , CrO 3 , and metallic Cr in our prepared nanoparticles were calculated to be 90.19, 5.41, and 4.40%, respectively.…”

Section: Resultsmentioning

confidence: 99%

Microwave-Assisted Synthesis of Chromium Oxide Nanoparticles for Fluorescence Biosensing of Mercury Ions and Molecular Logic Computing

Liu

Yao

et al. 2021

ACS Appl. Nano Mater.

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Cumbersome and inefficient synthesis of chromium-based nanomaterials with unique physicochemical properties and bioactivity limits their wide and practical applications. Simple, fast, and green synthesis of chromium-based nanomaterials will help promote the discovery of their properties and expansion of their application fields. Herein, we proposed rapid, inexpensive, and large-scale methods for the synthesis of chromium oxide nanoparticles (Cr2O3 NPs) by simply microwave-heating Cr3+ ions and citrate for several minutes. The citrate-coated Cr2O3 NPs with a universal fluorescence quenching ability as the sensing platform can combine with biomolecules (DNA) for application in fluorescence biosensing of mercury ions and complex molecular logic computing. The Hg2+ assay had wide linear ranges (0.21–2 and 4.2–50.5 μM), a low detection limit (5.78 nM), and good recovery rates in actual water samples. In addition, the interaction of matter and energy (fluorescence) in the Cr2O3 NPs-based sensing system can be used to perform molecular logic gate operations from simple (YES, NOT, AND, and OR gates) to complex circuits. This research can provide an idea for rapid and large-scale preparation of chromium-based nanomaterials and offer an opportunity for the extensive and in-depth exploration of properties (such as unique optical or enzyme-mimetic) and multipurpose applications (sensing, catalysis, logic computing, and encryption) of chromium-based nanomaterials.

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“…An extremely large accessible surface area of electrolyte ions should be possessed by the electrode material so that the EDLC has the ability to store more charges [18][19][20][21]. Carbon-based materials with high speci c surface area, such as activated carbon, graphene, carbon nanotube and carbon aerogel, have become the main selection objects of electrode materials for EDLCs [22][23][24]. Among them, activated carbon has become the most widely used electrode materials for EDLCs due to its abundant raw materials, mature preparation method, low cost and non-toxicity [25,26].…”

Section: Introductionmentioning

confidence: 99%

Investigation on pore structure regulation of activated carbon derived from sargassum and its application in supercapacitor

Tan

et al. 2022

Preprint

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In order to realize the effective regulation of the pore structure of activated carbon and optimize its pore structure properties as electrode material, the effects of activation temperature, activation time and impregnation ratio on the specific surface area, total pore volume and average pore diameter of activated carbon are studied by orthogonal experiment with sargassum as raw material. In addition, the electrochemical properties of sargassum-based activated carbon (SAC) and the relationship between the gravimetric capacitance and specific surface area of SAC are also studied. The SACs prepared under all conditions have high specific surface area (≥2227 m2 g-1) and developed pore structure, in which the micropore diameter is mainly concentrated in 0.4~0.8 nm, the mesopore diameter is mainly concentrated in 2~4 nm, and the micropore content is much higher than that of the mesopore. In the activation process, the impregnation ratio has the greatest effect on the specific surface area of SAC, the activation temperature and impregnation ratio have significant effect on the total pore volume of SAC, and the regulation of the average pore diameter of SAC is mainly realized by adjusting the activation temperature. The SACs exhibit typical electric double layer capacitance performances on supercapacitors, delivering superior gravimetric capacitance of 237.3 F g-1 in 6 mol L-1 KOH electrolyte system at current density of 0.5 A g-1 and excellent cycling stability of capacitance retention of 92% after 10000 cycles. A good linear relationship between gravimetric capacitance and specific surface area of SAC is observed.

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The effect of activation methods on the electrochemical performance of ordered mesoporous carbon for supercapacitor applications

Cited by 41 publications

References 40 publications

Designing and Fabricating Ordered Mesoporous Metal Oxides for CO2 Catalytic Conversion: A Review and Prospect

Designing and Fabricating Ordered Mesoporous Metal Oxides for CO2 Catalytic Conversion: A Review and Prospect

Microwave-Assisted Synthesis of Chromium Oxide Nanoparticles for Fluorescence Biosensing of Mercury Ions and Molecular Logic Computing

Investigation on pore structure regulation of activated carbon derived from sargassum and its application in supercapacitor

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