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- Title
CdS sensitizes TiO<sub>2</sub> nanotubes arrays for photocatalytic degradation of water pollution.
- Authors
Xiong, Xudong; Duan, Zhenkun; Liu, Yang; Xiong, Xiaobo; Zhang, Shengkang; Wang, Yongqian
- Abstract
Titanium dioxide nanotube arrays (TNAs) has shown great potential for applications in environmental pollution treatment and solar chemical energy conversion. Cadmium sulfide (CdS), also as a typical photocatalytically active semiconductor material, has a narrow forbidden bandgap energy of only 2.42 eV. The unique hollow tubular structure of titanium dioxide nanotubes, on the other hand, offers the possibility of CdS composite TNAs. In this study, TNAs were first prepared by a one-step anodic oxidation method under optimized conditions, and then the prepared TNAs were used as cathodes to deposit CdS on TNAs substrates by electrodeposition in an electrolyte containing sodium thiosulfate and cadmium chloride. The effects of electrochemical deposition voltage, reaction time, and the relationship between the ratios of S and Cd sources on the properties of CdS/TNAs composite structures were systematically investigated. The CdS/TNAs with the best characterization performance were selected for photocatalytic degradation, and methylene blue was used to simulate organic pollutants. The results showed that CdS/TNAs had better photocatalytic activity compared with conventional TNAs. Based on this, the composite structure of CdS/TNAs by physical adsorption was also selected as a reference, and the results showed that the CdS/TNAs produced by electrochemical deposition had better photocatalytic performance and chemical stability. It provides a feasible way in water pollution treatment.
- Subjects
CHEMICAL energy conversion; WATER pollution; PHOTODEGRADATION; NANOTUBES; SOLAR energy conversion; COMPOSITE structures
- Publication
Journal of Materials Science: Materials in Electronics, 2023, Vol 34, Issue 36, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-023-11685-z