Premium
Preparation of RGO/TiO 2 photocatalyst and the mechanism of its hydrothermal process
Author(s) -
Wang Haiwang,
Wang Guanqi,
Zhang Yukai,
Ma Yuan,
Zhang Qiankang,
Pu Hongqin,
Xu Wujiabei,
Gao Dekuan,
Wang Bingzhu,
Qi Xiwei
Publication year - 2019
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201800426
Subject(s) - hydrothermal circulation , photocatalysis , anatase , titanium dioxide , hydrogen production , chemistry , rutile , hydrothermal synthesis , chemical engineering , nucleation , hydrogen , catalysis , organic chemistry , engineering
To improve the catalytic efficiency of nanotitanium dioxide, this research investigated the phase transformation, crystal growth, and hydrogen production efficiency of nanotitanium dioxide at different temperatures and pressures. The RGO/TiO 2 photocatalyst was prepared by a hydrothermal method using graphene oxide and butyl titanate as raw materials. Different types of photocatalyst samples were prepared by adjusting the reaction temperature and time in the hydrothermal process. X‐ray diffraction and transmission electron microscope techniques were employed to investigate the nucleation and growth processes of rutile and anatase in the hydrothermal process from the perspectives of thermodynamics and kinetics. The evolution of the titanium dioxide structure with hydrothermal temperature and hydrothermal time was analyzed. Finally, photocatalytic decomposition of water data shows that the photocatalyst with the best hydrogen production effect was obtained by 12 hr of hydrothermal treatment at a hydrothermal temperature of 180°C. The total hydrogen production of this sample was 0.037 mmol/g under a xenon lamp for 3 hr.