Preparation of nanosized Bi3NbO7 and its visible-light photocatalytic property.
Preparation of nanosized Bi3NbO7 and its visible-light photocatalytic property.
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DOI：
10.1016/j.jhazmat.2009.07.089
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发表时间：
2009-12
影响因子：
13.6
通讯作者：
Gaoke Zhang;Junling Yang;Shuiming Zhang;Qian Xiong;Baibiao Huang;Junting Wang;W. Gong
中科院分区：
文献类型：
--
作者：
Gaoke Zhang;Junling Yang;Shuiming Zhang;Qian Xiong;Baibiao Huang;Junting Wang;W. Gong
A nanosized Bi3NbO7was synthesized by the sol–gel method. The as-prepared samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), UV–vis diffuse reflectance spectrum, X-ray photoelectron spectroscopy (XPS) and Brunauer–Emmet–Teller (BET). The UV–vis diffuse reflectance spectrum of the sample obtained by the sol–gel method showed a markedly blue-shift as compared to that of the sample obtained by the solid-state reaction. The band gap of the Bi3NbO7nanoparticles was estimated to be about 2.43–2.59eV. XPS analysis confirmed that the mixed valence bismuth existed in the crystal structure of the photocatalyst and niobium in the compound Bi3NbO7was in the Nb5+valence state. The as-prepared nanopowders exhibited a high photocatalytic activity in the decomposition of acid red G in water and acetone in air under visible-light irradiation, which may be assigned to larger specific surface area and the oxygen vacancies and mixed valence bismuth in the structure of Bi3NbO7.
