Li Wei, Ding Hao, Ji Hua, Dai Wenbin, Guo Jianping, Du Gaoxiang
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), 100083 Beijing, China.
State Key Laboratory of Solid Waste Reuse for Building Materials, Beijing Building Materials Academy of Sciences Research, 100041 Beijing, China.
Nanomaterials (Basel). 2018 Jun 8;8(6):415. doi: 10.3390/nano8060415.
A photocatalytic active CdS-TiO₂ heterostructure composite was prepared by hydrothermal method and its morphology and properties were characterized. Results indicate that the CdS nanoparticles deposited on the surface of a TiO₂ nanoparticles, which was in anatase phase. The particle scale of both of the components reached approximately 15 nm. In comparison to pure TiO₂ (410 nm), the light absorption edge of the heterostructure composite was 550 nm, which could extend the light response from UV to the visible region. Under visible light irradiation, the degradation efficiency of tetracycline hydrochloride by the CdS-TiO₂ composite achieved 87.06%, significantly enhancing photocatalytic activity than the as-prepared pure TiO₂ and commercial TiO₂ (Degussa P25). This character is attributed to the synergetic effect of these two components in the absorption of visible light.
采用水热法制备了具有光催化活性的CdS-TiO₂异质结构复合材料，并对其形貌和性能进行了表征。结果表明，CdS纳米颗粒沉积在处于锐钛矿相的TiO₂纳米颗粒表面。两种组分的粒径均达到约15 nm。与纯TiO₂（410 nm）相比，该异质结构复合材料的光吸收边缘为550 nm，可将光响应从紫外区域扩展到可见光区域。在可见光照射下，CdS-TiO₂复合材料对盐酸四环素的降解效率达到87.06%，比制备的纯TiO₂和商用TiO₂（Degussa P25）的光催化活性显著提高。这一特性归因于这两种组分在可见光吸收方面的协同效应。
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