酵母菌生物模板法制备TiO_2

Preparation of TiO_2 by using yeast bio-template method

以酵母菌为生物模板,利用水热合成法制备TiO_2。在模板剂添加量为5.0%、水热合成温度为140℃、水热合成时间为4.5h、煅烧温度为350℃、煅烧时间为3.0h的制备条件下,所制备的TiO_2与未添加酵母菌模板的TiO_2相比,光催化降解酸性大红3R的性能提高23.3%。通过X射线衍射、扫描电子显微镜、透射电子显微镜等对催化剂的微观结构和形貌进行分析,制备的TiO_2为锐钛矿型,颗粒粒径为19~20nm。

By using yeast as biological template, TiO2 is prepared hy hydrothermal synthesis. Under the conditions that the template dosage is 5. 0%, the hydrothermal synthesis temperature is 140℃, the hydrothermal synthesis time is 4.5 h, the calcination temperature is 350℃ and the calcination time is 3.0 h, the performance of photoeatalytic degradation of acid red 3R is increased by 23.3% when the prepared TiOz is compared with that of TiO2 without yeast template. Through the analysis of the microstructure and morphology of the catalyst by X-ray diffraction, scanning electric microscopy, transmission electron microscopy, etc. , the prepared TiO2 is the anatase type and the particle size is 19--20 nm.