Le Manh-Cuong, Le Thu-Huong, Bui Thi Thanh-Huyen, Nguyen Quang-Dat, Do Thi Thanh-Ha, Tran Thi Minh-Nguyet
Faculty of Building Material, National University of Civil Engineering, Hanoi, Vietnam.
Faculty of Chemistry and Environment, Thuyloi University, Hanoi, Vienam.
Front Chem. 2021 Sep 17;9:738969. doi: 10.3389/fchem.2021.738969. eCollection 2021.
The TiO/SiO nanocomposite has been synthesized by a sol-gel method and investigated the effect of the SiO content (0, 5, 10, 15, 20, and 50%) on the rutile-to-anatase phase transition of TiO NPs. In order to increase the photocatalytic efficiency of the nanocomposite and decrease the price of material, the TiO/SiO Nc with content SiO of 15% sample is chosen for preparing silicate coating. The efficiency of photocatalytic MB and antibacterial ability in the air of W silicate coating (adding TiO/SiO Nc (15%)) achieve almost 100% for 60 h and 94.35% for 3 h, respectively. While the efficiency of photocatalytic MB and antibacterial ability of WO silicate coating (adding commercial TiO/SiO) is about 25-30% for 60 h and 6.02% for 3 h, respectively. The presence of TiO/SiO Nc (15%) with a larger surface area in W silicate coating can provide increased centers for absorption, photocatalytic reaction, and the contact between sample and bacteria lead to enhance the photocatalytic and antibacterial ability of W silicate coating.
通过溶胶-凝胶法合成了TiO/SiO纳米复合材料，并研究了SiO含量（0、5、10、15、20和50%）对TiO纳米颗粒金红石相向锐钛矿相转变的影响。为了提高纳米复合材料的光催化效率并降低材料成本，选择SiO含量为15%的TiO/SiO纳米复合材料制备硅酸盐涂层。含TiO/SiO纳米复合材料（15%）的W硅酸盐涂层对亚甲基蓝的光催化效率在60小时内几乎达到100%，在空气中的抗菌能力在3小时内达到94.35%。而含商用TiO/SiO的WO硅酸盐涂层对亚甲基蓝的光催化效率在60小时内约为25-30%，在空气中的抗菌能力在3小时内为6.02%。W硅酸盐涂层中具有较大表面积的TiO/SiO纳米复合材料（15%）的存在可以提供更多的吸附中心、光催化反应中心，并且样品与细菌之间的接触增强了W硅酸盐涂层的光催化和抗菌能力。
