【摘要】 采用水热法制备了立方相ZnSe负载的锐钛矿型TiO2纳米带复合材料。在140℃下反应6h制得的产物是六方相ZnO负载的TiO2纳米带,但此样品再在160℃下反应6h,则获得的产物是ZnSe负载的TiO2纳米带;若在140℃下将反应时间延长至24h,只有少量ZnO转变为ZnSe。紫外-可见吸收测试结果表明,负载的ZnSe对TiO2起到了可见光光敏化作用;可见光催化测试结果表明,ZnSe在TiO2纳米带的负载对罗丹明B的光催化降解活性起到一定程度的增强作用,但随着ZnSe负载量的增大,光催化降解活性显著降低。更多还原

【Abstract】 Cubic ZnSe-supported anatase TiO2 nanobelts can be prepared by hydrothermal synthesis process. Only hexagonal ZnO-supported TiO2 nanobelts were obtained at 140℃ for 6h, whereas after such product was treated at 160℃ for 6h once again, ZnSe-supported TiO2 nanobelts were prepared;if the reaction time was prolonged to 24h at 140℃, ZnO-supported TiO2 nanobelts with a little bit ZnSe could be observed. The TiO2 nanobelts with different ZnSe content were characterized using UV-Vis absorption and visible-light phtocatalysis. The measurement results revealed that they exhibited obvious visible-light absorption in the wavelength range of 400-500nm, and to some extent, the product with less ZnSe content showed higher photocatalytic activity in the degradation of Rhodamine B than that on TiO2 nanobelts, but the product with more ZnSe content only exhibited slight visible-light photocatalytic activity.更多还原