Gan Qiang, Feng Guoqi, Liu Xia, Shang Hairu, Feng Changgen
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, No.5, Zhongguancun South Street, Haidian District, Beijing, 100081, China.
College of Science, China Agricultural University, Beijing, 100193, China.
Environ Sci Pollut Res Int. 2017 Apr;24(10):9585-9593. doi: 10.1007/s11356-017-8526-3. Epub 2017 Feb 28.
Mesoporous Bi-S-TiO composites were synthesized by the method combining evaporation-induced self-assembly (EISA) method with impregnation process. Characterization shows mesoporous Bi-S-TiO was a highly crystalline anatase, with relatively high thermal stability, large surface area (75-120 m/g), and large mesopore (10-20 nm). The results also revealed that Bi and S species existed in Bi, S, S and S forms in the mesoporous TiO, which allow the mesoporous Bi-S-TiO illustrating strong absorption in the ultraviolet region, and the absorption edge shifts to the visible-light region. Photodegradation tests shown that, about 92.3% industrial aqueous dinitrotoluene (DNT) solution could be degraded by 1.5%Bi-S-TiO under UV irradiation for 5 h. Concentration of Bi ions and calcination temperature were found to play important roles in its mesoporous properties and photocatalytic activity.
通过蒸发诱导自组装（EISA）法与浸渍法相结合的方法合成了介孔Bi-S-TiO复合材料。表征显示介孔Bi-S-TiO为高度结晶的锐钛矿型，具有较高的热稳定性、较大的比表面积（75-120 m²/g）和较大的介孔（10-20 nm）。结果还表明，Bi和S物种以Bi、S、S和S形式存在于介孔TiO中，这使得介孔Bi-S-TiO在紫外区域表现出强烈的吸收，且吸收边缘向可见光区域移动。光降解测试表明，在紫外光照射5小时的条件下，1.5%的Bi-S-TiO可降解约92.3%的工业二硝基甲苯（DNT）水溶液。发现Bi离子浓度和煅烧温度对其介孔性质和光催化活性起着重要作用。
