A new V-doped Bi-2(O,S)(3) oxysulfide catalyst for highly efficient catalytic reduction of 2-nitroaniline and organic dyes

作者：Abay Angaw Kelemework; Kuo Dong Hau; Chen Xiaoyun; Saragih Albert Daniel

来源：Chemosphere, 2017, 189: 21-31.

DOI：10.1016/j.chemosphere.2017.09.018

• Bismuth oxysulfide
• V-doping
• 2-Nitroaniline
• Catalytic reduction
• Organic pollutant

A new type of convenient, and environmentally friendly, Vanadium (V)-doped Bi-2(O,S)(3) oxysulfide catalyst with different V contents was successfully synthesized via a simple and facile method. The obtained V-doped Bi-2(O,S)(3) solid solution catalysts were fully characterized by conventional methods. The catalytic performance of the samples was tested by using the reduction of 2-nitroaniline (2-NA) in aqueous solution. The reduction decolorization of methylene blue (MB) and rhodamine B (RhB) was also chosen to evaluate the universality of catalysts. It was observed that the introduction of V can improve the catalytic performance, and 20%V-Bi-2(O,S)(3) was found to be the optimal V doping concentration for the reduction of 2-NA, MB, and RhB dyes. For comparative purposes, a related V-free Bi-2(O,S)(3) oxysulfide material was synthesized and tested as the catalyst. The superior activity of V-doped Bi-2(O,S)(3) over pure Bi-2(O,S)(3) was ascribed mainly to an increase in active sites of the material and also due to the presence of synergistic effects. The presence of V5+ as found from XPS analysis may interact with Bi atoms and enhancing the catalytic activity of the sample. In the catalytic reduction of 2-NA, MB and RhB, the obtained V-doped Bi-2(O,S)(3) oxysulfide catalyst exhibited excellent catalytic activity as compared with other reported catalysts. Furthermore this highly efficient, low-cost and easily reusable V-doped Bi-2(O,S)(3) catalyst is anticipated to be of great potential in catalysis in the future.

• 出版日期2017-12