Preparation of Z-type g-C3N4/Pt/TiO2 Nanotube Array Composite Electrode and Its Performance of Photoelectric Oxidation of Methanol

doi:10.7503/cjcu20210155

Abstract

Abstract:

g-C₃N₄ nanosheets were prepared by blowing dicyandiamide with NH₄Cl as a gas template， and then loaded on Pt/TiO₂ nanotube arrays（Pt/TiO₂ NTs） to prepare a new type of Z-type g-C₃N₄/Pt/TiO₂ NTs composite electrode. The structure of the material was characterized by means of scanning electron microscopy， X-ray diffraction spectrometer， and X-ray photoelectron spectroscopy. Electrochemical and photoelectrochemical methods were used to inspect the characteristics of the materials. The results show that the g-C₃N₄/Pt/TiO₂ NTs composite has an efficient performance of photoelectric oxidation of methanol under visible light irradiation. There are two main reasons for the high performance of g-C₃N₄/Pt/TiO₂ NTs composite：（1） the combination of g-C₃N₄ and Pt/TiO₂ NTs effectively expands the absorption in the visible light range；（2） Z-type charge transfer retains strong oxidation ability of holes and strong reduction of electrons， so that the photo-generated interme-diate acts on the electrocatalytic process and enhances the efficiency of methanol oxidation.

Key words: g-C₃N₄ nanosheet, Pt/TiO₂ nanotube, Composite electrode, Methanol oxidation

CLC Number:

O646

TrendMD:

XU Xiaolong, FANG Lining, LIU Changyu, LIU Minchao, JIA Jianbo. Preparation of Z-type g-C₃N₄/Pt/TiO₂ Nanotube Array Composite Electrode and Its Performance of Photoelectric Oxidation of Methanol[J]. Chem. J. Chinese Universities, 2021, 42(9): 2926.

Figures/Tables 9

References 30

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Preparation of Z-type g-C₃N₄/Pt/TiO₂ Nanotube Array Composite Electrode and Its Performance of Photoelectric Oxidation of Methanol

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