可见光响应TiO_2中空球的制备及在降解水体中有机物的应用  

Preparation of TiO_2 Hollow Spheres and Their Application in the Treatment of Organic Pollutants from Wastewater

作　　者：任艳梅[1] 李银辉[1,2,3] 王姝人[1] 杜牧[1] 龚雪情 陈建新[1,2,3] 

机构地区：[1]河北工业大学海洋科学与工程学院,天津300130 [2]海水资源高效利用化工技术教育部工程研究中心,天津300130 [3]河北省现代海洋化工技术协同创新中心,天津300130

出　　处：《纤维素科学与技术》2017年第2期45-51,共7页Journal of Cellulose Science and Technology

基　　金：国家自然科学基金(51309074;21276059);河北省自然科学基金(B2016202271);河北省科技支撑项目(16273101D);河北工业大学大学生创新创业训练计划项目资助

摘　　要：采用天然聚合物(可溶性淀粉、羧甲基纤维素、魔芋)或葡萄糖为碳源,通过水热碳化合成法制备了粒径分布均一的亲水性碳球,以硫酸氧钛为钛源,通过二次水热合成方法制备了核-壳型C-TiO_2复合材料,再经高温煅烧制得TiO_2空心球。通过XRD、SEM和TEM对所制备的TiO_2空心球进行了表征,结果表明所制备的TiO_2的晶型为锐钛矿型,TiO_2呈中空结构。此外,以甲基橙为典型的模拟有机污染物,通过在模拟太阳光下对所制备TiO_2空心球的光催化降解有机物的性能进行了评价,结果表明,3h内即可将溶液里的甲基橙完全降解,因此,该TiO_2空心球具有良好的光催化性能,在降解废水中的有机物方面具有潜在的应用价值。Using of natural polymer （such as soluble starch, carboxymethyl cellulose and konjac） or glucose as carbon source, hydrophilic carbon spheres with uniform particle size distribution were synthesized by hydrothermal carbonization process. Using titanyl sulfate as a titanium source, C-TiO2 composite with core-shell structures was prepared by secondary hydrothermal synthesis, and then TiO2 hollow spheres were obtained by calcination at 500℃ for 3 h. The as-prepared TiO2 hollow spheres were characterized by XRD, SEM and TEM. The results showed that the as-prepared TiO2 with hollow structures was anatase. In addition, methyl orange was used as organic pollutants, the photo-catalytic properties of the as-prepared TiO2 hollow spheres towards degradation of methyl orange were evaluated under simulated sunlight. The results showed that the methyl orange in the solution was completely degraded within 3 h, and so the TiO2 hollow spheres had perfectly photocatalytic performances, they had potential applications in degradation of organic compounds from the wastewater.

关 键 词：TiO2空心球 有机物降解 光催化性能 

分 类 号：O643.36[理学—物理化学]