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-凝胶法合成了TiO2/SiO2纳米复合材料，并探讨了SiO2含量（0%，5%，10%，15%，20%和50%）对TiO2纳米粒子中金红石到锐钛矿相变的影响。为了提升纳米复合材料的光催化效率并降低材料成本，选取了SiO2含量为15%的TiO2/SiO2 Nc样本用于制备硅酸盐涂层。在W硅酸盐涂层中添加TiO2/SiO2 Nc（15%）后，光催化MB的效率在60小时内几乎达到100%，而在3小时内抗菌能力达到94.35%。相比之下，添加市售TiO2/SiO2的WO硅酸盐涂层的光催化MB效率和抗菌能力分别为60小时内的25-30%和3小时内的6.02%。TiO2/SiO2 Nc（15%）在W硅酸盐涂层中的较大表面积能够提供更多的吸附、光催化反应中心和样品与细菌接触界面，从而增强W硅酸盐涂层的光催化和抗菌能力。