S掺杂的TiO₂-ZrO₂纳米颗粒在可见光照射下增强的光催化活性。
Enhanced photocatalytic activity of S-doped TiO2-ZrO2 nanoparticles under visible-light irradiation.
作者信息
Tian Guohui, Pan Kai, Fu Honggang, Jing Liqiang, Zhou Wei
机构信息
Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education, Laboratory of Physical Chemistry, School of Chemistry and Materials Science, Heilongjiang University, Harbin, Heilongjiang 150080, China.
出版信息
J Hazard Mater. 2009 Jul 30;166(2-3):939-44. doi: 10.1016/j.jhazmat.2008.11.090. Epub 2008 Dec 3.
Porous nanocrystalline S-doped TiO2-ZrO2 visible-light photocatalysts were prepared through a one-step method. The resulting materials were characterized by X-ray diffraction (XRD), N(2) adsorption-desorption measurements, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectra (DRS), Fourier transform infrared spectra (FT-IR) and electron paramagnetic resonance (ESR). It was found that modification by ZrO2 could effectively inhibit phase transformation, enhance visible-light absorption, and possess more surface hydroxyl groups. The photocatalytic activity of S-doped TiO2-ZrO2 was higher than that of unmodified S-doped TiO2 and Degussa P25. The enhanced photocatalytic activity could be attributed to the higher specific area, smaller crystal size, porous structure and more surface hydroxyl groups in the catalyst.
采用一步法制备了多孔纳米晶S掺杂TiO₂-ZrO₂可见光光催化剂。通过X射线衍射（XRD）、N₂吸附-脱附测量、透射电子显微镜（TEM）、X射线光电子能谱（XPS）、紫外-可见漫反射光谱（DRS）、傅里叶变换红外光谱（FT-IR）和电子顺磁共振（ESR）对所得材料进行了表征。结果发现，ZrO₂改性可以有效抑制相变，增强可见光吸收，并具有更多的表面羟基。S掺杂TiO₂-ZrO₂的光催化活性高于未改性的S掺杂TiO₂和Degussa P25。光催化活性的提高可归因于催化剂具有更高的比表面积、更小的晶体尺寸、多孔结构和更多的表面羟基。
Zotero 插件