摘要
以钛酸丁酯为钛源,十六烷基三甲基溴化铵为模板剂,采用水热合成法制备介孔TiO_2纳米光催化剂。利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、比表面积孔径分析仪、紫外-可见分光光度计分析等方法对材料进行表征和测试。重点研究模版剂用量对所制TiO_2纳米光催化剂结构和光催化性能的影响。结果表明,纳米TiO_2光催化剂具有单一的锐钛矿相结构,晶粒尺寸小于12.8 nm;当模板剂用量(n_(CTAB)/n_(Ti))为0.5%时,催化剂的介孔孔径尺寸为5~16 nm,比表面积为162.8 m^2/g,孔容体积为0.38 cm^3/g,对光的吸收波长为460 nm,吸附能力强、光催化活性高。
Mesoporous nano TiOz photocatalyst was prepared by hydrothermal synthesis using tetrabutyl titanate as the titanium source and hexadecyl trimethyl ammonium bromide as the template. The materials were characterized by X-ray diffraction （XRD）, scanning electron microscope （SEM）, transmission electron microscope （TEM）, specific surface area and aperture analyzer and ultraviolet visible photometer. The influences of the template dosage on the structure and photocatalytic properties of the nano TiO2 photocatalyst were studied. The results show that mesoporous nano TiO2 photocatalyst are composted of only anatase phase and its crystal size less than 12.8 nm. When the template content （nCTAB/nTI） reached 0.5%, nano TiO2 photocatalyst possess a typical mesoporous material with pore diameters of 5 to 16 nm, large specific surface area of 162.8 m2/g and pore volume of 0. 38 cm3/g. The mesoporous nano TiO2 photocatalyst shows strong adsorption capacity and excellent photocatalytic activity to degrade methyl orange solution. The absorption wavelength of the solar light is 460 nm.
出处
《有色金属工程》
CAS
CSCD
北大核心
2018年第1期42-46,共5页
Nonferrous Metals Engineering
基金
宿迁学院自然科学基金重点项目(2016KY03)
关键词
二氧化钛
光催化
介孔
水热合成法
纳米
TiO2
photocatalysis
mesoporous
hydrothermal synthesis
nanometer
