The preparation and study of multilayer structured SiO2-TiO2 film: the effects of photonic crystals on enhanced photocatalytic properties
The preparation and study of multilayer structured SiO2-TiO2 film: the effects of photonic crystals on enhanced photocatalytic properties
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多层结构SiO2-TiO2薄膜的制备与研究：光子晶体对增强光催化性能的影响
DOI：
10.1007/s10853-020-04836-8
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发表时间：
2020
影响因子：
4.5
通讯作者：
Wang Xiufeng
中科院分区：
文献类型：
--
作者：
Wu Yuanting;Liu Tiantian;Yuan Jun;Liu Changqing;Wu Penghong;Lu Jian;Wang Xiufeng
设计并采用自组装法和旋涂法制备了SiO2-光子晶体/TiO 2多层复合薄膜（STF）。利用扫描电镜（SEM）和紫外/维斯/近红外分光光度计对STF的微观形貌和光学性能进行了表征。以罗丹明B的降解率为指标考察了STF的光催化活性。表征结果表明，当氨水用量为3 mL，SiO2悬浮液浓度为1%时，STF具有规则有序的结构，且SiO2能与TiO 2有效结合，STF的光催化性能最好。进一步制备了SiO2-光子晶体/TiO 2双层复合薄膜（DSTF），并与单层SiO2-光子晶体/TiO 2复合薄膜（SSTF）进行了比较。DSTF的光催化性能优于SSTF。最后，对STF光催化性能增强的机理进行了探讨，指出光子晶体可以有效地增强中心带隙波长附近的光的利用率，进而提高光催化剂的光催化性能。
Herein, SiO2-photonic crystal/TiO2composite film (STF) with multilayer structure was designed and fabricated via self-assembly method and spin coating method. The micro-morphology and optical properties of the STF were characterized by scanning electron microscope (SEM) and UV/Vis/NIR spectrophotometer respectively. The photocatalytic activity of the STF was tested via the degradation rate of rhodamine B. The characterization results indicate that the STF has a regular ordered structure when the amount of ammonia is 3 mL and the concentration of SiO2suspension is 1%, and SiO2can be effectively combined with TiO2, so the STF has the best photocatalytic performance. The double-layer SiO2-photonic crystal/TiO2composite film (DSTF) was further prepared and compared with the single-layer SiO2-photonic crystal/TiO2composite film (SSTF). The photocatalytic properties of the DSTF are better than that of the SSTF. Finally, the mechanism of STF with enhanced photocatalytic performance is discussed, indicating that photonic crystal can effectively enhance the utilization of light which are near the wavelength of the center band gap, and then improve the photocatalytic performance of the photocatalyst.