Small amount of TiO2 modified SnO2 with enhanced photocatalytic performance toward the removal of rhodamine B

Yi Zhang; Hu Yang; Wei Zou

Small amount of TiO₂ modified SnO₂ with enhanced photocatalytic performance toward the removal of rhodamine B

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Author(s): Yi Zhang¹ ; Hu Yang¹ ; Wei Zou¹
- Affiliations: 1: Key Laboratory of Fine Chemical Additives and Surfactants of Sichuan Institutes of High Education, College of Chemistry Engineering, Sichuan University of Science and Engineering , Zigong 643000 , People's Republic of China
Source: Volume 15, Issue 14, 16 December 2020, p. 1033 – 1037
DOI: 10.1049/mnl.2020.0320 , Online ISSN 1750-0443

Received 03/06/2020, Accepted 03/08/2020, Revised 17/07/2020, Published 16/12/2020

Tin dioxide (SnO₂) photocatalyst has broad prospects for the degradation of toxic organic pollutants; however, its practical application is greatly hampered by poor activity due to the high recombination rates of photogenerated electron-hole pairs. In this work, titania (TiO₂) modified SnO₂ photocatalysts were obtained by a facile hydrothermal method to suppress the rapid recombination of photogenerated electron-hole pairs and improve the photocatalytic activity. Ultraviolet–visible (UV–vis)_ diffuse reflectance spectra suggest that TiO₂–SnO₂ composite photocatalysts hold stronger UV light absorption ability than that of the pure SnO₂. Surface photovoltage spectroscopy and photoelectrochemistry results show that the separation rate of photogenerated charge pairs of TiO₂–SnO₂ photocatalysts was greatly enhanced. The photocatalytic activities of the photocatalysts were evaluated by the decay of rhodamine B (RhB) under UV irradiation illumination. The results display that modification of SnO₂ by TiO₂ can largely enhance the photocatalytic activity and the photocatalytic performance of 0.5:1-TS sample is nearly 5 times that of the pure SnO₂. Moreover, maintaining the ratio of TiO₂ and SnO₂ at 0.5:1, the amount of catalyst was 30 mg, the concentration of dye was 10 mg/l, and the pH of RhB solution was 2, the sample has the best photocatalytic activity.

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Small amount of TiO₂ modified SnO₂ with enhanced photocatalytic performance toward the removal of rhodamine B

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