Enhanced visible light photocatalytic hydrogen evolution over porphyrin hybridized graphitic carbon nitride

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:506

Article

Mei, Shunkang¹  Gao, Jianping^1,2  Zhang, Ye³  Yang, Jiangbing¹  Wu, Yongli¹  Wang, Xiaoxue¹  Zhao, Ruiru¹  Zhai, Xiangang¹  Hao, Chaoyue¹  Li, Ruixia¹  Yan, Jing^1,2 

[1] Tianjin Univ, Sch Sci, Dept Chem, Tianjin 300350, Peoples R China

[2] Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China

[3] Tianjin Text Fibre Inspect Inst, Tianjin 300192, Peoples R China

关键词: Photocatalytic;    Hydrogen production;    g-C3N4;    Porphyrin;   

DOI  :  10.1016/j.jcis.2017.07.030

来源: Elsevier

【 摘 要 】

Tetra (4-carboxyphenyl) porphyrin (TCPP) was loaded on the surface of Pt/g-C3N4 via a simple adsorption process, and the microstructure and chemical structure of the composites were characterized by high resolution transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, UV-visible diffused reflectance spectroscopy and photoluminescence spectroscopy. Loading TCPP onto Pt/g-C3N4 enhanced the visible-light-driven photocatalytic evolution of H2 from water. The TCPP/Pt/g-C3N4 composite with a TCPP loading of 1 wt% had the highest photoactivity, which was 2.1 times higher than that of Pt/g-C3N4. This improvement is attributed to enhanced visible light utilization by the TCPP/Pt/g-C3N4 resulting from the strong visible light response of TCPP. In addition, the formed organic heterostructure between TCPP and g-C3N4 with overlapping bad gaps accelerates the electron transfer and inhibits the recombination of the photogenerated electrons and holes on g-C3N4. (C) 2017 Published by Elsevier Inc.

【 授权许可】

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