To develop Bi₂S₃-based heterojunction for efficient solar light induced photoreduction of Cr(VI), flower-like Bi₂S₃–In₂S₃ composites consisted of nanorods were prepared via a microwave-assisted hydrothermal route. In contrast with pure Bi₂S₃, Bi₂S₃–In₂S₃ composites exhibited the enhanced photoreduction activity while the decreased adsorption capacity for Cr(VI) removal. The best removal efficiency of 70 mg L⁻¹ Cr(VI) solution (99.86%) was achieved by the optimal 3-Bi₂S₃–In₂S₃ with a Bi/In molar ratio of 4:1 within 140 min. It’s ascribed to the narrow band gap for strengthened visible-light response, the tight interface between Bi₂S₃ and In₂S₃ for rapid transfer and separation of charge carriers, and the enough S vacancies for highly-efficient active sites of adsorption-photoreduction. However, the long-term photo-corrosion resulted in the slightly inferior reusability of 3-Bi₂S₃–In₂S₃ under solar light irradiation after five cycles.

为了开发基于Bi ₂ S ₃的异质结以有效地进行光诱导的Cr（VI）的光还原，通过微波辅助水热法制备了由纳米棒组成的花状Bi ₂ S ₃ -In ₂ S ₃复合材料。与纯Bi ₂ S _3相比，Bi ₂ S ₃ -In ₂ S ₃复合材料表现出增强的光还原活性，同时降低了去除Cr（VI）的吸附能力。最佳的3-Bi ₂ S可达到70 mg L ^-1 Cr（VI）溶液的最佳去除效率（99.86％）在140分钟内Bi / In摩尔比为4：1的₃ -In ₂ S ₃。归因于窄带隙可增强可见光响应，Bi ₂ S ₃和In ₂ S ₃之间紧密的界面可快速转移和分离载流子，以及足够的S空位可用于高效的吸附活性位。光还原。但是，长期的光腐蚀导致5次循环后在太阳光照射下3-Bi ₂ S ₃ -In ₂ S _3的可重复使用性稍差。