期刊
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
卷 66, 期 3, 页码 504-511出版社
SPRINGER
DOI: 10.1007/s10971-013-3038-1
关键词
CdS; TiO2; Core-shell; Visible-light; Photocatalytic
资金
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
- National Natural Science Foundation of China [21007040, 21047009]
- Programmes of Shanghai Municipality [11PJ1407500, 11SG42, 10160503200, DXL122, S30406]
CdS modified mesoporous titania core-shell spheres (CdS/CS-TiO2) with enhanced visible-light activity were synthesized by an in situ method. This method included two steps: planting CdO into the framework of anatase TiO2 core-shell spheres and then converting it to CdS by ion-exchange. The physicochemical properties of the obtained samples were investigated by X-ray diffraction, scanning electron microscopy, transmission electronic micrograph, UV-vis diffuse reflectance spectra and nitrogen sorption. The in situ strategy resulted in CdS quantum dots highly dispersed in CS-TiO2 without destroying the mesoporous core-shell structure. Compared with CS-TiO2, the as-synthesized samples exhibited stronger visible-light absorption capability and greatly enhanced photocatalytic activity toward the degradation of Rhodamine B and 4-chlorophenol aqueous solution under visible light irradiation (lambda > 420 nm).
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