标题：Transformation of Cuprous Oxide into Hollow Copper Sulfide Cubes for Photocatalytic Hydrogen Generation
作者：Toe, Cui Ying; Zheng, Zhaoke; Wu, Hao; Scott, Jason; Amal, Rose; Ng, Yun Hau
作者机构：[Toe, Cui Ying; Wu, Hao; Scott, Jason; Amal, Rose; Ng, Yun Hau] Univ New South Wales, Sch Chem Engn, Particles & Catalysis Res Grp, Sydney, NSW 2052, 更多
通讯作者：Ng, Yun Hau
通讯作者地址：[Ng, YH]Univ New South Wales, Sch Chem Engn, Particles & Catalysis Res Grp, Sydney, NSW 2052, Australia.
来源：JOURNAL OF PHYSICAL CHEMISTRY C
摘要：Copper sulfide (CuxS) with a hollow structure derived from the controlled transformation of cuprous oxide (Cu2O) demonstrated high activity for photocatalytic hydrogen generation with good reproducibility. While the high photocatalytic activity was facilitated by the better crystallinity and lower copper defect density (thus suppressed charge recombination) yielded through the controlled and equilibrated transformation reaction, the stability of the hollow CuxS photocatalyst was attributed to its resistance to sintering induced by the chemical dissolution-redeposition of copper (physicochemical stability). Without the controlled synthesis environment, irregularly shaped CuxS accompanied by a higher level of copper defects was obtained. During photocatalytic reaction, the irregularly shaped CuxS was more susceptible to deactivation through an agglomeration process.