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Construction 0d TiO_(2) nanoparticles/2d CoP nanosheets heterojunctions for enhanced photocatalytic H_(2) evolution activity

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Journal of Materials Science & Technology 2020年第21期56卷 196-205页

作者： Qinqin Liu Jinxin Huang Hua Tang Xiaohui Yu Jun Shen School of Materials Science and Engineering Jiangsu UniversityZhenjiang212013China School of Pharmacy Suzhou Vocational Health CollegeSuzhou215009China

It is still of gigantic challenging to design and to optimize photocatalytic systems with cost-efficiency for photocatalytic hydrogen evolution from water ***,noble-metal-free 2d CoP nanosheets were prepared by a phosphorization method using Co(OH)2 nanosheets as precursors,and then employed as photocatalytic cocatalyst and template to make 0d Ti O2 nanoparticles in-situ grow on the surface for construction of 0d/2d TiO_(2)/CoP hybrid by a simple hydrothermal *** TiO2/CoP hybrid with the optimal ratio of CoP cocatalyst(1 wt.%)manifested significantly improved photocatalytic H_(2) evolution rate of 0.604 mmol g^(-1) h^(-1),which is tenfold in comparison to pure TiO2(0.06 mmol g^(-1) h^(-1).The mechanism of performance enhancement was fully investigated and supposed that 2d CoP nanosheets cocatalyst can enhance the photo-absorption and provide more active sites for water reduction reaction;furthermore,2d CoP nanosheets with smaller work function and high conductivity would form an Ohmicjunction with TiO_(2) nanoparticles,which can significantly accelerate the separation of photo-generated charge carriers and improve the exploitation of the photoexcited electrons in water redox *** work is anticipated to impel more perspicacity into synthesizing innovative photocatalytic systems with 2d transition metal phosphides cocatalysts for attaining high photocatalytic H_(2) evolving pursuit.

关键词： Photocatalytic H_(2)evolution CoP nanosheets TiO_(2) 0d/2d heterojunction

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Point-to-face contact heterojunctions:Interfacial design of 0d nanomaterials on 2d g-C_(3)N_(4)towards photocatalytic energy applications

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Carbon Energy 2022年第5期4卷 665-730页

作者： Xin-Quan Tan Sue-Faye Ng Abdul Rahman Mohamed Wee-Jun Ong School of Energy and Chemical Engineering Xiamen University MalaysiaSelangor Darul EhsanMalaysia Center of Excellence for NaNo Energy&Catalysis Technology(CONNECT) Xiamen University MalaysiaSelangor Darul EhsanMalaysia Low Carbon Economy(LCE)Research Group School of Chemical EngineeringUniversiti Sains MalaysiaNibong TebalPulau PinangMalaysia State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamenFujianChina Shenzhen Research Institute of Xiamen University ShenzhenGuangdongChina

Green energy generation is an indispensable task to concurrently resolve fossil fuel depletion and environmental issues to align with the global goals of achieving carbon ***,a process that transforms solar energy into clean fuels through a photocatalyst,represents a felicitous direction toward ***-rich metal-free graphitic carbon nitride(g-C_(3)N_(4))is profiled as an attractive photocatalyst due to its fascinating properties,including excellent chemical and thermal stability,moderate band gap,visible light-active nature,and ease of ***,the shortcomings of g-C_(3)N_(4)include fast charge recombination and limited surface-active sites,which adversely affect photocatalytic *** the modification strategies,point-to-face contact engineering of 2d g-C_(3)N_(4)with 0d nanomaterials represents an innovative and promising synergy owing to several intriguing attributes such as the high specific surface area,short effective charge-transfer pathways,and quantum confinement *** review introduces recent advances achieved in experimental and computational studies on the interfacial design of 0d nanostructures on 2d g-C_(3)N_(4)in the construction of point-to-face heterojunction ***,0d materials such as metals,metal oxides,metal sulfides,metal selenides,metal phosphides,and nonmetals on g-C_(3)N_(4)with different charge-transfer mechanisms are systematically discussed along with controllable synthesis *** applications of 0d/2d g-C_(3)N_(4)-based photocatalysts are focused on solar-to-energy conversion via the hydrogen evolution reaction,the CO_(2)reduction reaction,and the N2 reduction reaction to evaluate the photocatalyst activity and elucidate reaction ***,future perspectives for developing high-efficiency 0d/2d photocatalysts are proposed to explore potential emerging carbon nitride allotropes,large-scale production,machine learning integration,and multidiscipli

关键词： 0d/2d heterojunction charge-transfer mechanisms g-C_(3)N_(4)nanosheets heterojunction interface photocatalysis solar-to-energy conversion

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