State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, China.
School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, China.
Photochem Photobiol. 2016 Nov;92(6):800-807. doi: 10.1111/php.12653. Epub 2016 Dec 8.
Visible-light-driven Ag/AgBr/TiO /activated carbon (AC) composite was prepared by solgel method coupled with photoreduction method. For comparison, TiO , TiO /AC, and Ag/AgBr/TiO were also synthesized. Their characteristics were analyzed by XRD, SEM-EDS, TG-DSC and UV-vis techniques. Photocatalytic activity and antibacterial performance under visible-light irradiation were investigated by ICP-AES, ATR-FT-IR and spectrophotometry methods using methylene blue and Escherichia coli as target systems, respectively. The results showed that Ag/AgBr was successfully deposited on anatase TiO /AC surface, and exhibited a distinct light absorption in the visible region. Ag/AgBr/TiO /AC displayed excellent antibacterial performance both in dark and under visible-light illumination. The growth of E. coli cell was inhibited in the presence of Ag/AgBr/TiO /AC in dark. Moreover, upon visible-light illumination, a significant damage of cell membrane was noticed. Ag/AgBr/TiO /AC was also shown higher photocatalytic efficiency for methylene blue degradation than those of TiO , TiO /AC, and Ag/AgBr/TiO . This is attributed to the synergetic effect between AC and Ag/AgBr/TiO , of which AC acts as the role of increasing reaction areas, continuous enriching, and transferring the adsorbed MB molecules to the surface of supported photocatalysts, and the Ag/AgBr/TiO acts as a highly active photocatalyst for degrading MB molecules under visible-light irradiation.
采用溶胶-凝胶法结合光还原法制备了可见光驱动的 Ag/AgBr/TiO/活性炭（AC）复合材料。为了进行比较，还合成了 TiO、TiO/AC 和 Ag/AgBr/TiO。通过 XRD、SEM-EDS、TG-DSC 和 UV-vis 技术对它们的特性进行了分析。分别以亚甲基蓝和大肠杆菌为目标体系，采用 ICP-AES、ATR-FT-IR 和分光光度法研究了可见光照射下的光催化活性和抗菌性能。结果表明，Ag/AgBr 成功沉积在锐钛矿 TiO/AC 表面，并在可见光区显示出明显的光吸收。Ag/AgBr/TiO/AC 在黑暗和可见光照射下均表现出优异的抗菌性能。在黑暗中，Ag/AgBr/TiO/AC 的存在抑制了大肠杆菌细胞的生长。此外，在可见光照射下，发现细胞膜受到了显著的损伤。与 TiO、TiO/AC 和 Ag/AgBr/TiO 相比，Ag/AgBr/TiO/AC 对亚甲基蓝的降解具有更高的光催化效率。这归因于 AC 和 Ag/AgBr/TiO 之间的协同效应，其中 AC 起到增加反应面积、连续富集和将吸附的 MB 分子转移到负载型光催化剂表面的作用，而 Ag/AgBr/TiO 在可见光照射下作为一种高效的光催化剂用于降解 MB 分子。
