Wang Zhaojie, Wang Shutao, Liu Junxue, Jiang Wen, Zhou Yan, An Changhua, Zhang Jun
College of Science, China University of Petroleum, Qingdao 266580, China.
State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China.
Materials (Basel). 2016 Apr 29;9(5):329. doi: 10.3390/ma9050329.
Metal sulfides-based nanomaterials have been used as a class of efficient solar driven photocatalysts. However, the H₂-production rate observed over these photocatalysts remains problematic. Here, the AgInS₂-Ag₂S-ZnS-In₆S₇ (, , = 0 or 1) nanocomposites with controlled compositions have been successfully prepared by a simple hydrothermal method with AgI polyhedrons as silver source. The obtained AgInS₂-Ag₂S-ZnS-In₆S₇ nanocomposites showed a composition-dependent activity for H₂ evolution from aqueous solution under simulated sun-light irradiation. The results showed that the optimized product of AgInS₂-Ag₂S-ZnS nanoparticles synthesized with the precursor ratio of Ag:Zn = 1:1 exhibited the highest H₂ evolution rate of 5.4 mmol·g·h. Furthermore, the catalyst can be used for 20 h without loss of activity, showing its high stability. It opens a new path to achieve highly efficient solar photocatalyst for H₂ evolution from water splitting.
基于金属硫化物的纳米材料已被用作一类高效的太阳能驱动光催化剂。然而，在这些光催化剂上观察到的产氢速率仍然存在问题。在此，通过一种简单的水热法，以AgI多面体作为银源，成功制备了具有可控组成的AgInS₂-Ag₂S-ZnS-In₆S₇（x, y, z = 0或1）纳米复合材料。所获得的AgInS₂-Ag₂S-ZnS-In₆S₇纳米复合材料在模拟太阳光照射下，对从水溶液中析氢表现出与组成相关的活性。结果表明，以前体中Ag:Zn = 1:1的比例合成的AgInS₂-Ag₂S-ZnS纳米颗粒的优化产物表现出最高的析氢速率，为5.4 mmol·g⁻¹·h⁻¹。此外，该催化剂可使用20小时而不损失活性，显示出其高稳定性。它为实现用于水分解析氢的高效太阳能光催化剂开辟了一条新途径。
