Ag/HSTiO对甲基橙降解的光催化性能及机理研究

Li Mingxin, Guan Renquan, Li Jiaxin, Zhao Zhao, Zhang Junkai, Qi Yunfeng, Zhai Hongju, Wang Lijing

Jilin Provincial Key Laboratory of Plant Resource Science and Green Production, Jilin Normal University, Siping 136000, People's Republic of China.

Key Laboratory of Preparation and Applications of Environmental Friendly Materials of the Ministry of Education, Jilin Normal University, Changchun 130103, China.

ACS Omega. 2020 Aug 21;5(34):21451-21457. doi: 10.1021/acsomega.0c01832. eCollection 2020 Sep 1.

The Sol-gel method is successfully used to prepare high specific surface area TiO (HSTiO). Then, the photodeposition method is used to composite silver particles with HSTiO. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Brunauer-Emmett-Teller, and UV-vis spectroscopy are used to characterize the Ag/HSTiO nanocomposites. It can be concluded that the prepared TiO has a large specific surface area, reaching 125.5 m g. Additionally, the addition of silver particles successfully broadens the photoresponse range from the UV region to the visible light region. In order to evaluate the photocatalytic activity of Ag/HSTiO, we conducted the methyl orange degradation test. The results showed that the photocatalytic activity of the sample is significantly higher than that of pure TiO.

溶胶-凝胶法被成功用于制备高比表面积的TiO（HSTiO）。然后，采用光沉积法将银颗粒与HSTiO复合。利用X射线衍射、扫描电子显微镜、透射电子显微镜、布鲁诺尔-埃米特-泰勒法和紫外-可见光谱对Ag/HSTiO纳米复合材料进行表征。可以得出结论，所制备的TiO具有较大的比表面积，达到125.5 m²/g。此外，银颗粒的加入成功地将光响应范围从紫外区域拓宽到可见光区域。为了评估Ag/HSTiO的光催化活性，我们进行了甲基橙降解试验。结果表明，样品的光催化活性明显高于纯TiO。