State of Doped Phosphorus and Its Influence on the Physicochemical and Photocatalytic Properties of P-doped Titania
State of Doped Phosphorus and Its Influence on the Physicochemical and Photocatalytic Properties of P-doped Titania
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DOI：
10.1021/jp806121m
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发表时间：
2008-09
影响因子：
3.7
通讯作者：
Renyang Zheng;Li Lin;Jinglin Xie;Yuexiang Zhu;You-chang Xie
中科院分区：
文献类型：
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作者：
Renyang Zheng;Li Lin;Jinglin Xie;Yuexiang Zhu;You-chang Xie
采用简单的溶胶-凝胶法制备了一系列不同磷含量的掺磷二氧化钛样品。采用X射线衍射、Brunauer-Emmett-Teller比表面积、差热分析-热重、X射线光电子能谱、傅里叶变换红外光谱、拉曼光谱和紫外-维斯漫反射光谱对样品进行了表征，并测试了样品在紫外和可见光照射下对亚甲基蓝（MB）的光降解。结果发现，掺杂的磷以五价氧化态存在，以Ti−O−P键的形式取代了TiO 2晶格中的部分Ti 4+。提高焙烧温度得到的二氧化钛表面上的P物种的富集。可见光响应的主要基团是晶格中的P物种，而表面上的P物种可以延缓金红石向金红石的相变，增加比表面积和光响应。
A series of phosphorus-doped titania samples with different phosphorus contents have been prepared by a simple, modified sol−gel method. The obtained samples were characterized by X-ray diffraction spectrometry, Brunauer−Emmett−Teller surface area, differential thermal analysis-thermogravimetry, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, and UV−vis diffuse reflectance spectroscopy, and the photodegradation of methylene blue (MB) on the samples was tested under both UV and visible light irradiation. It was found that the doped phosphorus existed in a pentavalent oxidation state, replacing part of Ti4+ in the anatase lattice in the form of Ti−O−P bonds. Increased calcination temperature gave an enrichment of P species on the titania surface. The P species in the titania lattice should be the dominant group responsive to visible light, whereas the P species on the surface could retard the phase transition of anatase to rutile and increase the surface area a...