新型层状化合物系列 HLaTa(x/3)Nb2-x/3O(7)/Pt（x=0、2、3、4 和 6）的光催化析氢活性。
Photocatalytic activities for hydrogen evolution of new layered compound series HLaTa(x/3)Nb2-x/3O(7)/Pt (x=0, 2, 3, 4, and 6).
机构信息
The Key Laboratory for College of Materials Science and Engineering, Huaqiao University of Fujian Higher Education, Institute of Materials Physical Chemistry, Huaqiao University, Quanzhou 362021, China.
出版信息
J Hazard Mater. 2010 May 15;177(1-3):458-64. doi: 10.1016/j.jhazmat.2009.12.055. Epub 2009 Dec 21.
HLaTa(x/3)Nb(2-x/3)O(7) were synthesized by successive reactions of conventional solid-state reaction followed by ion exchange reaction. They were characterized by power X-ray diffraction, UV-vis diffusive reflectance and scan electron microscope. The effect of substitution of Ta for Nb in HLaNb(2)O(7) has been studied on the photocatalytic decomposition of water under UV light irradiation with methanol as electron donor and Pt as promoter catalyst. The x value in HLaTa(x/3)Nb(2-x/3)O(7) had an important effect on the photocatalytic activity of the catalyst. When x=2, HLaTa(2/3)Nb(4/3)O(7)/Pt shows a photocatalytic activity of 136 cm(3)g(-1)h(-1) hydrogen evolution in rate 10 vol.% methanol aqueous solution under irradiation with wavelength more than 290 nm from a 100-W mercury lamp.
采用传统的固相反应用于连续反应，然后用离子交换反应，合成了 HLaTa(x/3)Nb(2-x/3)O(7)。用粉末 X 射线衍射、紫外-可见漫反射和扫描电子显微镜对其进行了表征。研究了 Ta 取代 HLaNb(2)O(7)中 Nb 的取代对在紫外光照射下，甲醇作为电子给体和 Pt 作为促进催化剂时水的光催化分解的影响。在 HLaTa(x/3)Nb(2-x/3)O(7)中，x 值对催化剂的光催化活性有重要影响。当 x=2 时，在波长大于 290nm 的 100W 汞灯下，HLaTa(2/3)Nb(4/3)O(7)/Pt 在 10vol.%甲醇水溶液中的光催化制氢速率为 136cm(3)g(-1)h(-1)。
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