Covalently bonded 2D/2D O-g-C3N4/TiO2 heterojunction for enhanced visible-light photocatalytic hydrogen evolution

Zhong, Ruyi1,2; Zhang, Zisheng1; Yi, Huqiang2; Zeng, Lei1; Tang, Chao1; Huang, Limin1; Gu, Meng2

2018-12-05

10.1016/j.apcatb.2017.12.066

APPLIED CATALYSIS B-ENVIRONMENTAL   影响因子和分区

0926-3373

1873-3883

Visible-light photocatalytic hydrogen evolution is a key step towards utilizing solar energy. Here we constructed covalently bonded oxidized graphitic C3N4/TiO2 (O-g-C3N4/TiO2) heterostructure with high surface area via an in-situ solvothermal synthetic strategy. The edge-anchoring of two-dimensional (2D) TiO2 on 2D O-g-C3N4 was evidenced by the HAADF-STEM EDS mapping, EELS and XPS analysis. Density functional theory computations suggest strong affinity between TiO2 and O-g-C3N4 2D structures through N-O-Ti covalent bonding, which drastically enhances the synergetic effect of the light absorption of O-g-C3N4 and high surface area of TiO2. The as-formed heterojunction can remarkably boost the visible-light photocatalytic activity for H-2 evolution by 6.1 times compared to physical mixture of TiO2 nanosheets (NS) and O-g-C3N4.

2D/2D nanocomposite Solvothermal synthesis Covalent heterojunction DFT calculations Photocatalytic hydrogen evolution

SCI ; EI

英语

第一 ; 通讯

Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06N532]

Chemistry ; Engineering

Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical

WOS:000442973700115

ELSEVIER SCIENCE BV

20180804819745

Chemical bonds ; Density functional theory ; Heterojunctions ; Light absorption ; Solar energy ; Solar power generation ; Titanium dioxide

Solar Power:615.2 ; Solar Energy and Phenomena:657.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Physical Chemistry:801.4 ; Inorganic Compounds:804.2 ; Probability Theory:922.1

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

Zhong, Ruyi,Zhang, Zisheng,Yi, Huqiang,et al. Covalently bonded 2D/2D O-g-C3N4/TiO2 heterojunction for enhanced visible-light photocatalytic hydrogen evolution[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2018,237:1130-1138.

Zhong, Ruyi.,Zhang, Zisheng.,Yi, Huqiang.,Zeng, Lei.,Tang, Chao.,...&Gu, Meng.(2018).Covalently bonded 2D/2D O-g-C3N4/TiO2 heterojunction for enhanced visible-light photocatalytic hydrogen evolution.APPLIED CATALYSIS B-ENVIRONMENTAL,237,1130-1138.

Zhong, Ruyi,et al."Covalently bonded 2D/2D O-g-C3N4/TiO2 heterojunction for enhanced visible-light photocatalytic hydrogen evolution".APPLIED CATALYSIS B-ENVIRONMENTAL 237(2018):1130-1138.