Journal
CHEMICAL PHYSICS LETTERS
Volume 785, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.cplett.2021.139123
Keywords
Bismuth sulfide; Photocatalysis; Piezocatalysis; Ultrasound
Funding
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2013/07296-2]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [142035/2017-3]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior -Brasil (CAPES) [001]
- Universitat Jaume I [UJI-B2019-30, UJI-B2019-41]
- Ministerio de Ciencia, Innovacion y Universidades (Spain) [PGC2018094417-B-I00]
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The study demonstrated that Bi2S3 semiconductor behaves as a piezoelectric material under ultrasound, facilitating electron and hole transfer and enabling the formation of oxidizing agents. While Bi2S3 showed no photocatalytic activity in the presence of light, ultrasound led to a significant increase in RhB degradation.
In this study, we have demonstrated that Bi2S3 semiconductor under ultrasound behaves as a piezoelectric material, facilitating the transfer of electrons and holes, thus enabling the formation of oxidizing agents. In the presence of light, Bi2S3 showed no photocatalytic activity, resulting in Rhodamine B (RhB) degradation of 2.5%, while the ultrasound application led to a degradation of 40.6%. Herein, we propose a possible mechanism to explain this behavior based on the local charge polarization in [BiS7] clusters.
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