New Photocatalyst, Sb2S3, for Degradation of Methyl Orange under Visible-Light Irradiation

• Published in: Journal of physical chemistry. C Vol. 112; no. 46; pp. 18076 - 18081
• Main Authors: Sun, Meng, Li, Danzhen, Li, Wenjuan, Chen, Yibin, Chen, Zhixin, He, Yunhui, Fu, Xianzhi
• Format: Journal Article
• Language: English
• Published: American Chemical Society 20.11.2008
• Subjects: C: Surfaces, Interfaces, Catalysis
• ISSN: 1932-7447; 1932-7455
• DOI: 10.1021/jp806496d

A novel visible-light photocatalyst, Sb2S3, was synthesized with a simple method. The specimen was characterized by X-ray diffraction, transmission electron microscopy, Brunauer−Emmett−Teller (BET) surface area analysis, and UV−vis diffuse reflectance spectroscopy. The results revealed that the as-synthesized sample was orthorhombic phase and consisted of rodlike particles. It possessed a surface area of 15.1 m2·g−1, and the band gap was about 1.66 eV. The photocatalytic activity of Sb2S3 nanorods was evaluated by the decomposition of methyl orange in aqueous solution under visible-light irradiation. The results demonstrated that the photodegradation ratio of methyl orange was up to 97% after 30 min of irradiation, which was much better than that of CdS and TiO2−x N x under the same condition. Meanwhile, the possible mechanism of the photocatalytic reaction had also been studied by liquid chromatography−mass spectrometry, and the •OH had been detected also by terephthalic acid photoluminescence probing technique.