Journal ArticleDOI
Active sites provided by the surface autocatalytic effect and quantum confinement for stable and efficient photocatalytic hydrogen generation
Ruiming Jia,Qingfeng Gui,Lina Sui,Yan Huang,Honggang Lu,Hongzhou Dong,Shuai Ma,Zhixing Gan,Zhixing Gan,Lifeng Dong,Liyan Yu +10 more
TLDR
In this paper, a metal-free photocatalyst is constructed by anchoring the ultrasmall SiC nanocrystals on carbon nitride (CN) nanosheets for efficient and durable hydrogen generation.Abstract:
Photocatalytic hydrogen evolution from water is a promising approach for renewable energy generation and storage. However, traditional photocatalysts suffer from limited hydrogen evolution rates due to the lack of active sites. In this work, we demonstrate that a plenty of active sites can be provided by the surface autocatalytic effect and quantum confinement of ultrasmall SiC nanocrystals (NCs). A metal-free photocatalyst is constructed by anchoring the ultrasmall SiC NCs on carbon nitride (CN) nanosheets for efficient and durable hydrogen generation. Moreover, the optical absorption in the visible range and the separation of electrons and holes are significantly improved by the heterojunction band alignment. As a consequence, the CN/SiC NC composite exhibits a high hydrogen evolution rate up to 1889 μmol g−1 h−1 under visible light irradiation with an apparent quantum yield (AQY) of 9.8% at 420 nm. And the photocatalyst shows high stability in the cyclic test. This work provides a new strategy to develop highly efficient photocatalysts for hydrogen generation via the surface autocatalytic effect and quantum confinement.read more
Citations
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Journal ArticleDOI
Construction of 2D-layered quantum dots/2D-nanosheets heterostructures with compact interfaces for highly efficient photocatalytic hydrogen evolution.
Ruiming Jia,Zhixing Gan,Honggang Lu,Chenjie Wang,Wei Guan,Hongzhou Dong,Beili Pang,Lina Sui,Zhixing Gan,Lifeng Dong,Liyan Yu +10 more
TL;DR: In this paper, the authors anchor 2D layered black phosphorous quantum dots (BPQDs) onto the 2D ZnIn2S4 nanosheets with sulfur vacancies (V-ZIS).
Journal ArticleDOI
Construction of 2D-layered quantum dots/2D-nanosheets heterostructures with compact interfaces for highly efficient photocatalytic hydrogen evolution
TL;DR: In this article , the authors anchor 2D layered black phosphorous quantum dots (BPQDs) onto the 2D ZnIn2S4 nanosheets with sulfur vacancies (V-ZIS).
Journal ArticleDOI
Highly Efficient Photocatalytic Hydrogen Evolution over Mo-Doped ZnIn2S4 with Sulfur Vacancies
Wei Guan,Lin Zhang,Peng Wang,Ying Wang,Haoyu Wang,Xingchen Dong,Ming Meng,Lina Sui,Zhixing Gan,Lifeng Dong,Liyang Yu +10 more
TL;DR: In this paper , the preparation of molybdenum-doped thin ZnIn2S4-containing S vacancies was conducted using a one-pot solvothermal method, and the coordination of Mo doping and S vacancies not only enhances visible light absorption and facilitates the separation of photogenerated carriers but also provides many active sites for photocatalytic reactions.
Journal ArticleDOI
WO3–x/PbS/Au Ternary Heterojunction Nanostructures for Visible-Light-Driven Photocatalytic Hydrogen Generation
TL;DR: In this article , narrow-bandgap PbS, widebandgap WO3-x, and Au nanoparticles were combined to form a plasmon-mediated Z-scheme nanostructure for the first time.
Journal ArticleDOI
Spatial confinement: A green pathway to promote the oxidation processes for organic pollutants removal from water.
Huan G Yi,Eydhah Almatrafi,De Ma,Xiuqin Huo,Lei Qin,Ling Li,Xuerong Zhou,Chengyun Zhou,Guangming Zeng,Cui Yuan Lai +9 more
TL;DR: In this paper , the application, performance and mechanisms of spatial confinement mediated OPs are discussed in detail, and environmental influences (including environmental pH, organic matter and inorganic ions) are studied with analyzing their intrinsic connection with the features of spatial conflating in OPs.
References
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Journal ArticleDOI
Visible-Light Photocatalysis in Nitrogen-Doped Titanium Oxides
TL;DR: Film and powders of TiO2-x Nx have revealed an improvement over titanium dioxide (TiO2) under visible light in optical absorption and photocatalytic activity such as photodegradations of methylene blue and gaseous acetaldehyde and hydrophilicity of the film surface.
Journal ArticleDOI
A metal-free polymeric photocatalyst for hydrogen production from water under visible light
Xinchen Wang,Kazuhiko Maeda,Arne Thomas,Kazuhiro Takanabe,Gang Xin,Johan M. Carlsson,Kazunari Domen,Markus Antonietti +7 more
TL;DR: It is shown that an abundant material, polymeric carbon nitride, can produce hydrogen from water under visible-light irradiation in the presence of a sacrificial donor.
Journal ArticleDOI
Metal-free efficient photocatalyst for stable visible water splitting via a two-electron pathway
Juan Liu,Yang Liu,Naiyun Liu,Yuzhi Han,Xing Zhang,Hui Huang,Yeshayahu Lifshitz,Yeshayahu Lifshitz,Shuit-Tong Lee,Jun Zhong,Zhenhui Kang +10 more
TL;DR: The design and fabrication of a metal-free carbon nanodot–carbon nitride (C3N4) nanocomposite is reported and its impressive performance for photocatalytic solar water splitting is demonstrated.
Journal ArticleDOI
Visible-light driven heterojunction photocatalysts for water splitting – a critical review
TL;DR: Li et al. as mentioned in this paper provided an overview of the concept of heterojunction construction and more importantly, the current state-of-the-art for the efficient, visible-light driven junction water splitting photo(electro)catalysts reported over the past ten years.
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