Sulfur-Doped Cubic Mesostructured Titania Films for Use as a Solar Photocatalyst
Sulfur-Doped Cubic Mesostructured Titania Films for Use as a Solar Photocatalyst
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DOI：
10.1021/acs.jpcc.7b01615
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发表时间：
2017-04
影响因子：
3.7
通讯作者：
Yuli Xiong;Daping He;R. Jaber;P. Cameron;K. Edler
中科院分区：
文献类型：
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作者：
Yuli Xiong;Daping He;R. Jaber;P. Cameron;K. Edler
采用蒸发诱导自组装技术，采用浸渍提拉法制备了具有立方介观结构的硫掺杂二氧化钛薄膜。研究了硫掺杂对介孔薄膜的结构、形貌、孔隙率、光学性能和光催化活性的影响。与未掺杂的二氧化钛薄膜相比，S-掺杂的薄膜表现出更好的长程有序性，更大的孔径，更高的孔隙率，更少的收缩的结构在煅烧过程中，红移的带隙，和更亲水的表面。这些特性导致了改善的光催化活性时，S-掺杂和未掺杂的二氧化钛薄膜进行了测试降解亚甲基蓝在水溶液中的1个太阳的照射下，从太阳模拟器。硫掺杂的二氧化钛薄膜的光催化活性在太阳光照射下的三个连续实验期间是稳定的，证实了掺杂的纳米结构薄膜光催化剂的机械稳定性和可重复使用性。
Sulfur-doped titania thin films with cubic mesostructures were prepared by dip coating via the evaporation induced self-assembly route. The effect of sulfur doping on structure, morphology, porosity, optical properties, and photocatalytic activity of the mesoporous films was studied. Compared to undoped titania films, the S-doped films showed better long-range ordering, bigger pore size, higher porosity, less shrinkage of the structure during calcination, a red-shift of the band gap, and a more hydrophilic surface. These characteristics led to an improved photocatalytic activity when the S-doped and undoped titania films were tested for degradation of methylene blue in aqueous solutions under the irradiation of 1 sun from a solar simulator. The photocatalytic activity of the sulfur doped titania film was stable during three consecutive experiments under solar light irradiation, confirming the mechanical stability and reusability of the doped nanostructured thin film photocatalysts.