锐钛矿型F-TiO2溶胶制备及光催化降解4-氯苯酚的性能  

Preparation of anatase F-TiO_2 and its performance for the photodegradation of 4-chlorophenol

作　　者：黄冬根[1] 廖世军[2] 周文斌[1] 全水清[1] 刘雷[1] 

机构地区：[1]南昌大学环境科学与工程学院,鄱阳湖湖泊生态与生物资源综合利用教育部重点实验室,江西南昌330031 [2]华南理工大学化学科学学院,广东广州510640

出　　处：《功能材料》2008年第7期1166-1169,1173,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(40672159);广东省自然基金资助项目(036555);江西省教育厅科研资助项目(GJJ08029);南昌大学博士启动基金资助项目(060162)

摘　　要：以电解钛丝为前驱物,用过氧化氢溶解-改性水热晶化法制备了锐钛型氟掺杂二氧化钛溶胶。应用XRD、TEM、PSD、UV-vis-DRS,FTIR、XPS技术对溶胶粒子的大小、形貌、晶型、氟的存在形式进行了表征;研究了氟的掺杂量及溶液的pH值对溶胶光催化降解4-氯苯酚性能的影响。结果表明,130℃水热反应15h后生成的TiO2溶胶为纯锐钛型结构,平均粒径为11.0nm;氟分别以吸附态、结合态的形式存在于TiO2粒子的表面和晶格中;氟掺杂后溶胶粒子对4-氯苯酚的吸附能力增大并有利于4-氯苯酚深度矿化。Fluorine doped TiO2 （F-TiO2） sol photocatalyst was prepared by the process of H2 O2 dissolution-hydrothermal crystallization method with electrolytic titanium as precursor. The morphology,particle size and the present forms of F atoms of as-prepared F-TiO2 sol were characterized by XRD,TEM,PSD,UV-vis-DRS,FTIR and XPS; the effects of pH and concentration of fluorine in F-TiO2 sol on the photodegradation of 4-chlorophenol were discussed. The results showed that F-TiO2 particles in sol were anatase structure and the average particle size was ca. 11.0nm calculated from XRD after hydrothermal reaction at 130℃ for 15h. It was also shown that fluorine atoms were adopted by TiO2 sol particles with two forms,one was physically adsorbed on the surface of TiO2 ,and the other was embedded into TiO2 crystal lattice. The adsorption capability of TiO2 sol particles was increased and the mineralization 4-chlorophenol moved to high depth after the doping of fluorine atoms.

关 键 词：二氧化钛溶胶 光催化剂 氟掺杂 降解 4-氯苯酚 

分 类 号：O643[理学—物理化学]