Ning Gaomin, Zhang Yan, Shi Chunjing, Zhao Chen, Liu Mengmeng, Chang Fangfang, Gao Wenlong, Ye Sheng, Liu Jian, Zhang Jing
School of New Energy, Nanjing University of Science and Technology, Fuxing Road 8, Jiangyin 214000, China.
College of Science & School of Plant Protection, Anhui Agricultural University, Hefei 230036, China.
Nanomaterials (Basel). 2023 Mar 3;13(5):926. doi: 10.3390/nano13050926.
Engineering the surface structure of semiconductor is one of the most promising strategies for improving the separation and transfer efficiency of charge, which is a key issue in photocatalysis. Here, we designed and fabricated the C decorated hollow TiO photocatalysts (C-TiO), in which 3-aminophenol-formaldehyde resin (APF) spheres were used as template and carbon precursor. It was determined that the C content can be easily controlled by calcinating the APF spheres with different time. Moreover, the synergetic effort between the optimal C content and the formed Ti-O-C bonds in C-TiO were determined to increase the light absorption and greatly promote the separation and transfer of charge in the photocatalytic reaction, which is verified from UV-vis, PL, photocurrent, and EIS characterizations. Remarkably, the activity of the C-TiO is 5.5-fold higher than that of TiO in H evolution. A feasible strategy for rational design and construction of surface-engineered hollow photocatalysts to improve the photocatalytic performance was provided in this study.
设计半导体的表面结构是提高电荷分离和转移效率最具前景的策略之一，而电荷分离和转移效率是光催化中的关键问题。在此，我们设计并制备了碳修饰的空心TiO光催化剂（C-TiO），其中以3-氨基苯酚-甲醛树脂（APF）球作为模板和碳前驱体。结果表明，通过对APF球进行不同时间的煅烧，可以轻松控制碳含量。此外，确定了C-TiO中最佳碳含量与形成的Ti-O-C键之间的协同作用，可增加光吸收并极大促进光催化反应中电荷的分离和转移，这通过紫外可见光谱、光致发光、光电流和电化学阻抗谱表征得到了验证。值得注意的是，C-TiO在析氢反应中的活性比TiO高5.5倍。本研究提供了一种合理设计和构建表面工程化空心光催化剂以提高光催化性能的可行策略。
