A new type of convenient, and environmentally friendly, Vanadium (V)-doped Bi₂(O,S)₃ oxysulfide catalyst with different V contents was successfully synthesized via a simple and facile method. The obtained V-doped Bi₂(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-Bi₂(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 Bi₂(O, S)₃ oxysulfide material was synthesized and tested as the catalyst. The superior activity of V-doped Bi₂(O,S)₃ over pure Bi₂(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 Bi₂(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 Bi₂(O,S)₃ catalyst is anticipated to be of great potential in catalysis in the future.

中文翻译：

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一种新型的V掺杂Bi ₂（O，S）₃氧硫化物催化剂，用于高效催化还原2-硝基苯胺和有机染料

通过一种简便易行的方法，成功地合成了一种新型，方便，环保的钒含量不同的掺钒（Bi）（O，S）_3的氧硫化铋₂（O，S）₃催化剂。通过常规方法充分表征了所得的V掺杂的Bi ₂（O，S）₃固溶催化剂。通过使用2-硝基苯胺（2-NA）在水溶液中的还原来测试样品的催化性能。还选择了亚甲基蓝（MB）和若丹明B（RhB）的还原/脱色来评估催化剂的通用性。观察到，引入V可以改善催化性能，并且20％的V-Bi ₂（O，S）₃据发现，这是还原2-NA，MB和RhB染料的最佳V掺杂浓度。为了比较，合成了一种相关的无V的Bi ₂（O，S）₃氧硫化物，并作为催化剂进行了测试。V掺杂的Bi ₂（O，S）₃优于纯Bi ₂（O，S）_3的活性主要归因于材料活性位点的增加，也归因于存在协同效应。从XPS分析中发现，V ⁵⁺的存在可能与Bi原子相互作用并增强样品的催化活性。在2-NA，MB和RhB的催化还原中，获得的V掺杂Bi ₂（O，S）₃与其他报道的催化剂相比，氧硫化物催化剂表现出优异的催化活性。此外，预计这种高效，低成本且易于重复使用的V掺杂Bi ₂（O，S）₃催化剂在未来具有巨大的催化潜力。