Carbothermal activation synthesis of 3D porous g-C3N4/carbon nanosheets composite with superior performance for CO2 photoreduction

Wang, Yangang; Xia, Qineng; Bai, Xia; Zhang, Ge; Yang, Qian; Yin, Chaochuang; Kang, Shifei; Dong, Mingdong; Li, Xi

doi:10.1016/j.apcatb.2018.08.018

Cited by 130 publications

(64 citation statements)

References 55 publications

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“…The correlation among specific surface area, corresponding average pore and volume of the 3D C/g‐C 3 N 4 composites and pure g‐C 3 N 4 were listed in Table S2. The specific surface area was increased from 50.19 m 2 /g (g‐C 3 N 4 ) to 90.63 m 2 /g (3D C/g‐C 3 N 4 ‐3), as well as the pore volume enlarged from 0.031 cm 3 /g (g‐C 3 N 4 ) to 0.188 cm 3 /g (3D C/g‐C 3 N 4 ‐3), which can be attribute to the presence of 3D carbon in the composites in favor of forming 3D porous structure and reducing the stacked layers . This characteristic structure with high surface area and pore volume can increase the number of active site and accelerate the transfer of the accelerating the transfer of the intermediates, which is beneficial for photocatalytic reaction …”

Section: Resultsmentioning

confidence: 98%

“…designed a two‐dimensional carbon ring (Cring)‐g‐C 3 N 4 in‐plane heterostructure, which was shown to increase the lifetime of photo‐generated carriers by ten times and achieved an average quantum yield of 5 % at 420 nm . Furthermore, a latest research validated that 3D porous graphitic carbon nitride/carbon (g‐C 3 N 4 /C) nanosheets composite shown impressive photocatalytic performance in converting CO 2 to fuels, which could be attributed to the enhanced light trapping/utilization and low recombination of the photogenerated electron‐hole pairs, as reported by Wang et al . However, to the best of our knowledge, there are rare discussions on 3D g‐C 3 N 4 /C heterostructure photocatalysts toward highly efficient H 2 production.…”

Section: Introductionmentioning

confidence: 99%

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Three‐Dimensional Hierarchical Porous Carbon/Graphitic Carbon Nitride Composites for Efficient Photocatalytic Hydrogen Production

et al. 2019

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Developing low-cost, wide-source, and nontoxicity photocatalysts is highly desirable for application in efficient solar energy conversion. In this work, a series of nanosheet-assembled threedimensional (3D) hierarchical porous carbon/graphitic carbon nitride (3D C/g-C 3 N 4 ) composites have been successfully synthesized as efficient photocatalysts for hydrogen production. The optimal 3D C/g-C 3 N 4 shows the largest H 2 evolution rate of 1610 μmol h À 1 g À 1 , which is nearly seven times that of bulk g-C 3 N 4 . Such remarkably improved photocatalytic performance is mainly attributed to that: i) the 3D carbon effectively prevents nanosheets from agglomeration as well as serves as high speed channels for electron transport; ii) the interconnected porous network is favorable for the multiple reflections and utilization of light; and iii) the interfacial interaction between g-C 3 N 4 and 3D carbon is beneficial to the charge separation and transfer.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Three‐Dimensional Hierarchical Porous Carbon/Graphitic Carbon Nitride Composites for Efficient Photocatalytic Hydrogen Production

et al. 2019

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“…Attracted by above mentioned advantages, various thin‐layered photocatalysts have been reported and exhibit potential application values in CO 2 reduction ( Table 2 ). [ 22,47,50,59,64, 66,89,92,117,136,146,193–205 ] For example, the single‐crystalline thin‐layered InVO 4 has been successfully fabricated by Zhou and co‐workers. As revealed by the AFM image, the height of the InVO 4 nanosheet is about 1.5 nm, corresponding to three unit cells.…”

Section: Photocatalytic Applicationsmentioning

confidence: 99%

Thin‐Layered Photocatalysts

Sun

Huang

Zhao

et al. 2020

Adv Funct Materials

132

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Semiconductor photocatalysis, a green and sustainable technology, is of great significance for solving environmental pollution and energy shortages. However, the common problems of inefficient light harvesting, rapid recombination of electron-hole pairs, and low surface reactive reaction sites for photocatalysts urgently need to be solved. In this regard, thin-layered photocatalysts are considered to be one of the most promising candidates for addressing these issues, due to their unique surface and electronic properties. In this review, the various strategies for constructing thin-layered photocatalysts are summarized, and emphasis is given to approaches for optimizing the photocatalytic performance of the thin-layered materials, which can be classified into surface engineering and junction construction. In addition, the photocatalytic applications of thin-layered materials, i.e., water splitting, CO 2 reduction, nitrogen fixation, and molecule oxygen activation, are summarized. Finally, based on current achievements in thin-layered photocatalysts, their future development and challenges are discussed.

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“…There are adverse ways for graphene derivatives embodiment to MOFs, supposing the compatibility and band alignment of the host. A 3D structured porous nanosheet composites material is constructed from graphitic carbon (g-C 3 N 4 ) and carbon to yield (3D g-C 3 N 4 /C-NPs) material via pyrolysis and carbothermal activation method [326]. 3D g-C 3 N 4 /C-NPs pore volume and the BET surface area have been measured to be 5.825 cm 3 •g −1 and 454.2 m 2 •g −1 , respectively.…”

Section: Graphene-based Composite Mofsmentioning

confidence: 99%

Recent Innovation of Metal-Organic Frameworks for Carbon Dioxide Photocatalytic Reduction

2019

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The accumulation of carbon dioxide (CO2) pollutants in the atmosphere begets global warming, forcing us to face tangible catastrophes worldwide. Environmental affability, affordability, and efficient CO2 metamorphotic capacity are critical factors for photocatalysts; metal-organic frameworks (MOFs) are one of the best candidates. MOFs, as hybrid organic ligand and inorganic nodal metal with tailorable morphological texture and adaptable electronic structure, are contemporary artificial photocatalysts. The semiconducting nature and porous topology of MOFs, respectively, assists with photogenerated multi-exciton injection and adsorption of substrate proximate to void cavities, thereby converting CO2. The vitality of the employment of MOFs in CO2 photolytic reaction has emerged from the fact that they are not only an inherently eco-friendly weapon for pollutant extermination, but also a potential tool for alleviating foreseeable fuel crises. The excellent synergistic interaction between the central metal and organic linker allows decisive implementation for the design, integration, and application of the catalytic bundle. In this review, we presented recent MOF headway focusing on reports of the last three years, exhaustively categorized based on central metal-type, and novel discussion, from material preparation to photocatalytic, simulated performance recordings of respective as-synthesized materials. The selective CO2 reduction capacities into syngas or formate of standalone or composite MOFs with definite photocatalytic reaction conditions was considered and compared.

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Carbothermal activation synthesis of 3D porous g-C3N4/carbon nanosheets composite with superior performance for CO2 photoreduction

Cited by 130 publications

References 55 publications

Three‐Dimensional Hierarchical Porous Carbon/Graphitic Carbon Nitride Composites for Efficient Photocatalytic Hydrogen Production

Three‐Dimensional Hierarchical Porous Carbon/Graphitic Carbon Nitride Composites for Efficient Photocatalytic Hydrogen Production

Thin‐Layered Photocatalysts

Recent Innovation of Metal-Organic Frameworks for Carbon Dioxide Photocatalytic Reduction

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