Journal ArticleDOI
Mesoporous silicon carbide nanofibers with in situ embedded carbon for co-catalyst free photocatalytic hydrogen production
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TLDR
In this paper, mesoporous SiC nanofibers with in situ embedded graphitic carbon (SiC NFs-Cx) were synthesized via a one-step carbothermal reduction between electrospun carbon and Si powders.Abstract:
Silicon carbide (SiC) has been considered a promising metal-free photocatalyst due to its unique photoelectrical properties and thermal/chemical stability. However, its performance suffers from the fast recombination of charge carriers. Herein, we report mesoporous SiC nanofibers with in situ embedded graphitic carbon (SiC NFs-Cx) synthesized via a one-step carbothermal reduction between electrospun carbon nanofibers and Si powders. In the absence of a noble metal co-catalyst, the hydrogen evolution efficiency of SiC NFs-Cx is significantly improved under both simulated solar light (180.2 μmol·g–1·h–1) and visible light irradiation (31.0 μmol·g–1·h–1) in high-pH solution. The efficient simultaneous separation of charge carriers plays a critical role in the high photocatalytic activity. The embedded carbon can swiftly transfer the photogenerated electrons and improve light absorption, whereas the additional hydroxyl anions (OH–) in highpH solution can accelerate the trapping of holes. Our results demonstrate that the production of SiC NFs-Cx, which contains exclusively earth-abundant elements, scaled up, and is environmentally friendly, has great potential for practical applications. This work may provide a new pathway for designing stable, lowcost, high efficiency, and co-catalyst-free photocatalysts.read more
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Graphitic Carbon Nitride (g-C3N4)-Based Photocatalysts for Artificial Photosynthesis and Environmental Remediation: Are We a Step Closer To Achieving Sustainability?
TL;DR: It is anticipated that this review can stimulate a new research doorway to facilitate the next generation of g-C3N4-based photocatalysts with ameliorated performances by harnessing the outstanding structural, electronic, and optical properties for the development of a sustainable future without environmental detriment.
Journal ArticleDOI
The nonmetal modulation of composition and morphology of g-C3N4-based photocatalysts
TL;DR: In this article, a review of non-metal modulation of composition and morphology of graphitic carbon nitride (g-C3N4)-based photocatalysts is presented.
Journal ArticleDOI
Macroscopic-Scale Three-Dimensional Carbon Nanofiber Architectures for Electrochemical Energy Storage Devices
TL;DR: In this article, the authors summarized recent advances in the scalable fabrication of 3D carbon nanofiber (CNF)-based materials and their applications for electrochemical energy storage devices and gave a brief outlook to future studies.
Journal ArticleDOI
Copper-surface-mediated synthesis of acetylenic carbon-rich nanofibers for active metal-free photocathodes.
Tao Zhang,Yang Hou,Yang Hou,Volodymyr Dzhagan,Zhongquan Liao,Guo-Liang Chai,Markus Löffler,Davide Olianas,Alberto Milani,Shun-Qi Xu,Matteo Tommasini,Dietrich R. T. Zahn,Zhikun Zheng,Ehrenfried Zschech,Ehrenfried Zschech,Rainer Jordan,Xinliang Feng +16 more
TL;DR: The authors synthesized acetylene-rich carbon fibers by copper-mediated polymerization for high-activity, metal-free photocathodes for water reduction while photoelectrochemical devices combine light-absorption with fuel and electricity generation is hampered by high costs and low output.
Journal ArticleDOI
Phosphorus-doped porous carbon nitride for efficient sole production of hydrogen peroxide via photocatalytic water splitting with a two-channel pathway
Jingjing Cao,Hui Wang,Yajie Zhao,Yan Liu,Qingyao Wu,Hui Huang,Mingwang Shao,Yang Liu,Zhenhui Kang +8 more
TL;DR: In this article, a metal-free photocatalytic water splitting with a two-channel pathway (water oxidation reaction and oxygen reduction reaction) with high H2O2 yield of 1968 μmol g−1 h−1 (the highest yield in current records) under room temperature and normal pressure without sacrificial agent and cocatalyst.
References
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TL;DR: This review attempts to summarize the recent progress in the rational design and fabrication ofheterojunction photocatalysts, such as the semiconductor-semiconductor heterojunction, the semiconductors-metal heterojunctions, the silicon-carbon heteroj junction and the multicomponent heteroj conjunction.
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Highly efficient visible-light-driven photocatalytic hydrogen production of CdS-cluster-decorated graphene nanosheets.
TL;DR: High photocatalytic H(2)-production activity is attributed predominantly to the presence of graphene, which serves as an electron collector and transporter to efficiently lengthen the lifetime of the photogenerated charge carriers from CdS nanoparticles.