Wei Lin, Zeng Deqian, Xie Zongzhuo, Zeng Qingru, Zheng Hongfei, Fujita Toyohisa, Wei Yuezhou
Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, China.
Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, China.
Front Chem. 2021 Apr 15;9:655583. doi: 10.3389/fchem.2021.655583. eCollection 2021.
Designing low-cost, environment friendly, and highly active photocatalysts for water splitting is a promising path toward relieving energy issues. Herein, one-dimensional (1D) cadmium sulfide (CdS) nanorods are uniformly anchored onto two-dimensional (2D) NiO nanosheets to achieve enhanced photocatalytic hydrogen evolution. The optimized 2D/1D NiO/CdS photocatalyst exhibits a remarkable boosted hydrogen generation rate of 1,300 μmol h g under visible light, which is more than eight times higher than that of CdS nanorods. Moreover, the resultant 5% NiO/CdS composite displays excellent stability over four cycles for photocatalytic hydrogen production. The significantly enhanced photocatalytic activity of the 2D/1D NiO/CdS heterojunction can be attributed to the efficient separation of photogenerated charge carriers driven from the formation of p-n NiO/CdS heterojunction. This study paves a new way to develop 2D p-type NiO nanosheets-decorated n-type semiconductor photocatalysts for photocatalytic applications.
设计低成本、环境友好且高活性的用于水分解的光催化剂是缓解能源问题的一条有前景的途径。在此，一维（1D）硫化镉（CdS）纳米棒被均匀地锚定在二维（2D）氧化镍（NiO）纳米片上，以实现增强的光催化析氢性能。优化后的二维/一维NiO/CdS光催化剂在可见光下表现出显著提高的产氢速率，为1300 μmol h g，比CdS纳米棒高出八倍多。此外，所得的5% NiO/CdS复合材料在四个光催化产氢循环中表现出优异的稳定性。二维/一维NiO/CdS异质结显著增强的光催化活性可归因于由p-n NiO/CdS异质结的形成驱动的光生电荷载流子的有效分离。本研究为开发用于光催化应用的二维p型NiO纳米片修饰的n型半导体光催化剂开辟了一条新途径。
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