光催化
材料科学
三元运算
制氢
复合数
X射线光电子能谱
分解
化学工程
热分解
氢
催化作用
复合材料
计算机科学
化学
有机化学
工程类
程序设计语言
作者
Dehang Ma,Mingcai Yin,Kaiyue Liang,Miaomiao Xue,Yaoting Fan,Zhongjun Li
标识
DOI:10.1016/j.mssp.2023.107788
摘要
Facile preparation of efficient photocatalysts is one of the challenges to realizing the practical application of photocatalysis technology. In this paper, binary composite WO3-WS2 and ternary composite WO3–WS2–MoS2 were easily prepared through simple one-step acidification-thermal decomposition (abbreviated as AT) of ammonium tetrathiotungstate (ATT) and ammonium tetrathiomolybdate (ATM) just using the inevitable formation of WO3 during the acidification of ATT. Especially, their photocatalytic hydrogen production performances were determined and the reasons for their activity differences were investigated systematically based on XRD, SEM, TEM, and XPS characterizations. The results showed that on the whole, these two composites possess better performance than both pure MoS2 and WS2, as well as our previously reported WO3-WS2 (1637.8 μmol h−1 g−1). Besides, the average hydrogen evolution rate of WO3-WS2 (5998.6 μmol h−1 g−1) is higher than that of WO3–WS2–MoS2 (4907.2 μmol h−1 g−1). Moreover, for the ternary composites, when the content of W and Mo is close, the change in W to Mo ratio has no obvious impact on the hydrogen production performance. Finally, a performance comparison of different preparation methods manifests that the one-step AT method is the simplest and most effective. This work can offer useful guidance for the preparation and photocatalytic application of both WS2 and MoS2-based composites.
科研通智能强力驱动
Strongly Powered by AbleSci AI