DataSheet1_Synthesizing and Evaluating the Photocatalytic and Antibacterial Ability of TiO2/SiO2 Nanocomposite for Silicate Coating.pdf

The TiO2/SiO2 nanocomposite has been synthesized by a sol-gel method and investigated the effect of the SiO2 content (0, 5, 10, 15, 20, and 50%) on the rutile-to-anatase phase transition of TiO2 NPs. In order to increase the photocatalytic efficiency of the nanocomposite and decrease the price of material, the TiO2/SiO2 Nc with content SiO2 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 TiO2/SiO2 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 TiO2/SiO2) is about 25–30% for 60 h and 6.02% for 3 h, respectively. The presence of TiO2/SiO2 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.

本研究通过溶胶-凝胶法（sol-gel method）合成了TiO₂/SiO₂纳米复合材料，系统探究了SiO₂添加量（0、5、10、15、20及50%）对TiO₂纳米颗粒（TiO₂ Nanoparticles，NPs）金红石相向锐钛矿相相变的调控作用。为提升该纳米复合材料的光催化效率并降低材料成本，本研究选取SiO₂含量为15%的TiO₂/SiO₂纳米复合材料（TiO₂/SiO₂ Nc）制备硅酸盐涂层。添加该15% SiO₂含量TiO₂/SiO₂纳米复合材料的W型硅酸盐涂层，其光催化降解亚甲基蓝（Methylene Blue，MB）性能与空气中抗菌性能分别在60小时内达到近100%、3小时内可达94.35%。而添加商用TiO₂/SiO₂纳米复合材料的WO型硅酸盐涂层，其光催化降解MB性能与抗菌性能分别在60小时内仅为25%~30%、3小时内仅为6.02%。W型硅酸盐涂层中引入的15% SiO₂含量TiO₂/SiO₂纳米复合材料具备更大的比表面积，可提供更多吸附位点与光催化反应活性位点，同时强化涂层与细菌的接触，进而显著提升该硅酸盐涂层的光催化与抗菌性能。