Tang Mao, Xia Yangwen, Yang Daixiong, Liu Jiawei, Zhu Xiaodong, Tang Renyong
School of Mechanical Engineering, Chengdu University, Chengdu 610106, China.
School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China.
Materials (Basel). 2021 Sep 29;14(19):5674. doi: 10.3390/ma14195674.
Using butyl titanate and absolute ethanol as raw materials, TiO was prepared by a hydrothermal method with different hydrothermal times, and the influences of hydrothermal time on the structure and photocatalytic performance of TiO were investigated. The obtained samples were characterized by XRD, SEM, TEM, BET, PL and DRS, separately. The results show that TiO forms anatase when the hydrothermal time is 12 h, forms a mixed crystal composed of anatase and rutile when the hydrothermal time is 24 h, and forms rutile when the hydrothermal time is 36 h. With the extension of hydrothermal time, anatase gradually transforms into rutile and the surface area decreases. Although TiO-24 h and TiO-36 h show lower photoinduced charge recombination and higher light source utilization, TiO-12 h exhibits the highest photocatalytic activity owing to its largest surface area (145.3 m/g). The degradation degree of rhodamine B and tetracycline hydrochloride reach 99.6% and 90.0% after 45 min.
以钛酸丁酯和无水乙醇为原料，采用水热法在不同水热时间下制备了TiO，研究了水热时间对TiO结构和光催化性能的影响。分别采用XRD、SEM、TEM、BET、PL和DRS对所得样品进行表征。结果表明，水热时间为12 h时TiO形成锐钛矿型，水热时间为24 h时形成由锐钛矿和金红石组成的混合晶体，水热时间为36 h时形成金红石型。随着水热时间的延长，锐钛矿逐渐转变为金红石，比表面积减小。虽然TiO-24 h和TiO-36 h表现出较低的光生电荷复合和较高的光源利用率，但TiO-12 h因其最大的比表面积（145.3 m²/g）而表现出最高的光催化活性。45 min后罗丹明B和盐酸四环素的降解率分别达到99.6%和90.0%。
