期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 112, 期 46, 页码 18150-18156出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp805926b
关键词
-
资金
- National Natural Science Foundation of China [20503027, 20773113]
- Hundred Talent program of Chinese Academy of Sciences [IRT0756]
- MPG-CAS partner group
We have successfully prepared visible-light-active mesoporous N-doped TiO2 (N-TiO2) photocatalysts by the precipitation of titanyl oxalate complex ([TiO(C2O4)(2)](2-)) by ammonium hydroxide at a low temperature followed by calcination at different temperatures. The structures of N-TiO2 photocatalysts have been characterized in detail by means of powder X-ray diffraction, N-2 adsorption-desorption isotherms, infrared spectroscopy, diffuse reflectance UV-vis spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscope. The calcination process of the catalyst precursor was also studied by means of temperature-programmed reaction spectroscopy. N-TiO2 Photocatalysts exhibit comparable UV-light activity and visible-light activity in the photodegradation of methyl orange. The doped N species locates at the interstitial sites in TiO2, which leads to the band gap narrowing of TiO2. A novel and interesting result is that N-doped TiO2 calcined at 400 degrees C (N-TiO2-400) has Bronsted acid sites arising from covalently bonded dicarboxyl groups, which greatly enhances the adsorption capacity for methyl orange. The N-TiO2-400 catalyst is a promising adsorption-photodegradation integration catalyst; meanwhile, it is also a promising acid catalysis-photocatalysis bifunctional catalyst.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据