Enhancing the Sonolysis Efficiency of SrTiO3 Particles with Cr-Doping

Sonolysis could be more practical for water treatment than traditional catalytic methods in some specific situations. However, the practical application is limited by the low degradation rate. In this work, the Cr doped SrTiO 3 was prepared by hydrothermal method, and the Cr-doping results in the de...

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Bibliographic Details
Published in:Catalysis letters 2020-02, Vol.150 (2), p.562-572
Main Authors: Zhu, Liuyang, Gu, Wen, Zou, Wei, Liu, Huan, Zhang, Yingying, Wu, Qingmei, Fu, Zhengping, Lu, Yalin
Format: Article
Language:English
Subjects:
Catalysis
Cavitation
Chemistry
Chemistry and Materials Science
Chromium
Degradation
Doping
Dyes
Hydrothermal crystal growth
Industrial Chemistry/Chemical Engineering
Organometallic Chemistry
Physical Chemistry
Rhodamine
Strontium titanates
Tungsten
Ultrasonic imaging
Ultrasound
Water treatment
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Summary:Sonolysis could be more practical for water treatment than traditional catalytic methods in some specific situations. However, the practical application is limited by the low degradation rate. In this work, the Cr doped SrTiO 3 was prepared by hydrothermal method, and the Cr-doping results in the decreased crystal symmetry, which leads to the rough surface and a large number of pores of the sample. The appearance of a large number of holes increases the specific surface area and enhances the gas adsorption performance of the sample, which can promote the cavitation. The optimized Cr-doped SrTiO 3 can degrade 95.4% rhodamine B (5 mg/L) in 10 min under ultrasound irradiation (53 kHz, 350 W). Furthermore, the improvement of sonolysis degradation with the Cr doped SrTiO 3 is universal for dyes, such as methyl blue (MB), methyl orange (MO) and rhodamine B (RhB). The role of active species in ultrasonic catalysis and the synergistic mechanism of ultrasound and catalyst were systematically studied by adding sacrificial agents and changing the reaction atmosphere. This work indicates that the incorporation of finely modified inorganic particles is effective for efficient water treatment. Graphic Abstract
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-019-03008-x