Photocatalytic decomposition of acetaldehyde over rubidium bismuth niobates under visible light irradiation
Photocatalytic decomposition of acetaldehyde over rubidium bismuth niobates under visible light irradiation
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DOI：
10.2320/matertrans.46.2694
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发表时间：
2005-12-01
影响因子：
1.2
通讯作者：
Ye, JH
中科院分区：
文献类型：
--
作者：
Kako, T;Ye, JH
采用固相反应法制备了两种铋酸铷（RbBi 2Nb 5 O 16和RbBiNb 2 O 7），并通过X射线衍射、紫外可见光谱和扫描电镜对其进行了表征。这些氧化物可以吸收高达约420-440 nm波长的可见光。在可见光照射下，考察了两种光催化剂对室内空气中气态乙醛的光催化降解活性。结果表明，RbBi 2Nb 5 O 16比RbBiNb 2 O 7具有更高的光催化活性。此外，RbBi 2Nb 5 O 16沉积与1质量%-Pd的表面上表现出约3倍更好的光催化活性比裸材料。
Two types of rubidium bismuth niobate, RbBi2Nb5O16 and RbBiNb2O7, were prepared by a conventional solid state reaction method and characterized by X-ray diffraction analysis, UV-vis spectroscopy and SEM. These oxides can absorb up to approximately 420-440 nm wavelength of visible light. The photocatalytic activity of the two niobates in decomposing gaseous acetaldehyde, an indoor pollutant, was evaluated under visible light irradiation. The results indicated that RbBi2Nb5O16 showed a higher photocatalytic activity than RbBiNb2O7, in accordance with their different absorption properties. Moreover, RbBi2Nb5O16 deposited with 1 mass%-Pd on the surface exhibited approximately three times better photocatalytic activity than the bare material.