Li Zhengdao, Liu Kecheng, Sun Ruixue, Yang Chuanyun, Liu Xiaodi
Chemistry and Pharmaceutical Engineering College, Nanyang Normal University, Nanyang 473061, China.
Engineering Technology-Research Center of Henan Province for Solar Catalysis, Nanyang Normal University, Nanyang 473061, China.
Nanomaterials (Basel). 2022 Jun 20;12(12):2124. doi: 10.3390/nano12122124.
Hierarchical ZnSnO/ZnSnO porous hollow octahedrons were constructed using the method of combining the acid etching process with the in situ decoration technique for photovoltaic and photocatalytic applications. The composite was used as photoanode of the dye-sensitized solar cells (DSSCs), an overall 4.31% photovoltaic conversion efficiency was obtained, nearly a 73.1% improvement over the DSSCs that used ZnSnO solid octahedrons. The composite was also determined to be a high-performance photocatalyst for the removal of heavy metal ion Cr (VI) and antibiotic ciprofloxacin (CIP) in single and co-existing systems under simulated sunlight irradiation. It was remarkable that the composite displayed good reusability and stability in a co-existing system, and the simultaneous removal performance could be restored by a simple acid treatment. These improvements of solar energy utilization were ascribed to the synergetic effect of the hierarchical porous hollow morphology, the introduction of ZnSnO nanosheets, and the heterojunction formed between ZnSnO and ZnSnO, which could improve light harvesting capacity, expedite electron transport and charge-separation efficiencies.
采用酸蚀工艺与原位装饰技术相结合的方法构建了分级ZnSnO/ZnSnO多孔空心八面体，用于光伏和光催化应用。该复合材料用作染料敏化太阳能电池（DSSC）的光阳极，获得了4.31%的整体光电转换效率，比使用ZnSnO实心八面体的DSSC提高了近73.1%。该复合材料还被确定为一种高性能光催化剂，可在模拟太阳光照射下，在单一和共存体系中去除重金属离子Cr（VI）和抗生素环丙沙星（CIP）。值得注意的是，该复合材料在共存体系中表现出良好的可重复使用性和稳定性，通过简单的酸处理即可恢复同时去除性能。这些太阳能利用方面的改进归因于分级多孔空心形态、ZnSnO纳米片的引入以及ZnSnO与ZnSnO之间形成的异质结的协同效应，这可以提高光捕获能力、加快电子传输和电荷分离效率。
