摘要
以阳极氧化法和化学浴沉积法制备了WO3-Ti O_2改性Ti O_2纳米管光催化剂,并对制备的样品进行XRD、SEM、EDS和UV-Vis-DRS表征。结果表明:Ti O_2以锐钛矿型存在、WO3-Ti O_2改性Ti O_2纳米管中W/Ti/O原子比约为1∶33∶66、Ti O_2纳米管排列整齐、开口度高、表面有WO3-Ti O_2颗粒;WO3-Ti O_2的沉积有助于扩展Ti O_2纳米管的光响应范围。以2 m L的Ti、W前驱体溶液制备出的WO3-Ti O_2改性Ti O_2纳米管具有最高的光电流密度(1.42 m A·cm-2),表现出了对甲基橙最高的可见光催化降解活性。
WO3-TiO2-modified TiO2 nanotube photocatalysts were prepared via an anodization and chemical bath deposition technique. The samples were characterized by X-ray diffraction,scanning electron microscopy,energy dispersive spectroscopy,and ultraviolet-visible diffuse reflectance spectroscopy. The results indicated that anatase TiO2 was formed. The W / Ti / O molar ratio of the WO3-TiO2-modified TiO2 nanotubes was about1 ∶ 33 ∶ 66. The TiO2 nanotubes were uniform and well-open with WO3-TiO2 particles on the surface. WO3-TiO2 modification expanded the range of photo-absorption for photo-excitation of the TiO2 nanotubes. The TiO2 nanotubes deposited in a solution of 2 m L Ti and W precursor exhibited the highest current density（ 1. 42 m A ·cm- 2） and showed the highest photocatalytic activity for the degradation of methyl orange.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第8期4309-4313,共5页
Chinese Journal of Environmental Engineering
基金
上海市教委重点项目(12ZZ171)
