Zheng Yan, Wang Junpeng, Yang Ping
J Nanosci Nanotechnol. 2017 Feb;17(2):1204-209. doi: 10.1166/jnn.2017.12639.
Anatase TiO₂ with exposed {001} facets were synthesized via solvothermal method by using titanium (IV) butoxide as Ti source, hydrofluoric acid as capping agent and alcohol as solvent. Different alcohols such as methanol, ethanol, isopropyl alcohol, and n-butanol were investigated systematically. As-prepared samples were characterized by X-ray diffraction, field emission scanning electron microscope and transmission electron microscope. The results indicated that regular TiO₂ nanosheets were created from ethanol and isopropanol alcohol even though the size and thickness changed. However, TiO₂ nanosheets were attached together in methanol and n-butanol. The reasons of solvent effect the morphology and properties of TiO₂ crystals exposed {001} facets have been discussed. The photocatalysis investigation of samples was carried out by degradating methyl orange under ultraviolet light irradiation. TiO₂ nanosheets obtained in ethanol solvent exhibited superior photocatalytic performance compared with other samples. The reasons could attribute to TiO₂ nanosheets obtained in ethanol solvent with higher specific surface area, mesoporous structure, and exposed highly active {001} facets.
以丁醇钛（IV）为钛源、氢氟酸为封端剂、醇类为溶剂，通过溶剂热法合成了具有暴露{001}面的锐钛矿型TiO₂。系统研究了甲醇、乙醇、异丙醇和正丁醇等不同的醇类。采用X射线衍射、场发射扫描电子显微镜和透射电子显微镜对制备的样品进行了表征。结果表明，即使尺寸和厚度发生变化，乙醇和异丙醇也能生成规则的TiO₂纳米片。然而，TiO₂纳米片在甲醇和正丁醇中会相互附着。讨论了溶剂影响暴露{001}面的TiO₂晶体形态和性能的原因。通过在紫外光照射下降解甲基橙对样品进行了光催化研究。与其他样品相比，乙醇溶剂中获得的TiO₂纳米片表现出优异的光催化性能。原因可能是乙醇溶剂中获得的TiO₂纳米片具有更高的比表面积、介孔结构和暴露的高活性{001}面。
