低压快速氢化引入氧空位增强TiO<sub>2</sub>光催化降解性能

doi:10.19976/j.cnki.43-1448/TF.2023037

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Abstract A tube furnace was used to perform low-pressure rapid hydrogenation treatment on TiO₂ photocatalyst (P25) at 300, 400, and 500 ℃, and the effects of hydrogenation temperature on the phase structure, photoelectrochemical performance, and catalytic degradation activity of the sample were studied. The results show that the oxygen vacancy concentration, photogenerated carrier separation efficiency, visible light absorption performance, carrier concentration, and photocatalytic activity of P25 appear to first increase and then decrease as the hydrogenation temperature increases. P25 hydrogenated at 400 ℃ for 1 h has the best performance above. BET (Brunauer-Emmett-Teller) specific surface area of P25 is not sensitive to the change of hydrogenation temperature, indicating that low-pressure rapid hydrogenation can introduce oxygen vacancies while avoiding loss of specific surface area, inhibit the recombination of electron-hole pairs, improve light absorption performance and carrier concentration, thereby improving P25 photocatalytic performance. After hydrogenation treatment at 400 ℃ for 1 h, the reaction rate constant of P25 is 1.63 times than that of untreated P25.

Key words： titanium dioxide hydrogenation oxygen vacancy tetracycline photocatalytic degradation

Received: 31 March 2023 Published: 23 January 2024

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	CHEN Fenglei
	YANG Wanlin
	ZHU Junkui
	WEI Qiuping
	ZHANG Long
	LI Jing
	MA Li

Cite this article:

CHEN Fenglei,YANG Wanlin,ZHU Junkui, et al. Low pressure rapid hydrogenation induced oxygen vacancy to enhance the photocatalytic degradation performance of TiO₂[J]. Materials Science and Engineering of Powder Metallurgy, 2023, 28(6): 545-553.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2023037 OR http://pmbjb.csu.edu.cn/EN/Y2023/V28/I6/545

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