Zhou Chao, Shi Run, Shang Lu, Zhao Yufei, Waterhouse Geoffrey I N, Wu Li-Zhu, Tung Chen-Ho, Zhang Tierui
Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Chempluschem. 2017 Feb;82(2):181-185. doi: 10.1002/cplu.201600501. Epub 2016 Nov 16.
A facile and green process was developed for the synthesis of pyrochlore H Nb O hollow microspheres by using hydrothermal treatment of Sn Nb O hollow microspheres in aqueous 2 m HCl at 100-180 °C. The facile transformation of Sn Nb O into H Nb O is facilitated by the intrinsic ion-exchange capability of Sn Nb O . The resulting H Nb O hollow microspheres (diameter 1-2 μm, shell thickness 100-200 nm) displayed excellent photocatalytic performance for overall water splitting under UV irradiation, affording H and O evolution rates of 240 and 116 μmol h g , respectively. Following decoration with 0.5 wt % Pt, the H Nb O hollow microspheres demonstrated remarkably high H and O evolution rates of 1240 and 600 μmol h g , respectively. To our knowledge, this work is the first reported study examining the photocatalytic performance of H Nb O for water splitting. The hydrothermal synthesis method described here is also applicable to the synthesis of pyrochlore H Ta O from Sn Ta O , highlighting the versatility of the approach.
通过在100 - 180°C下于2 m盐酸水溶液中对SnNbO空心微球进行水热处理，开发了一种简便且绿色的合成焦绿石H Nb O空心微球的方法。SnNbO的固有离子交换能力促进了SnNbO向H Nb O的简便转化。所得的H Nb O空心微球（直径1 - 2μm，壳厚度100 - 200 nm）在紫外光照射下对整体水分解表现出优异的光催化性能，产氢和产氧速率分别为240和116μmol h g 。用0.5 wt%的Pt修饰后，H Nb O空心微球分别表现出高达1240和600μmol h g 的显著高的产氢和产氧速率。据我们所知，这项工作是首次报道的研究H Nb O用于水分解的光催化性能的研究。这里描述的水热合成方法也适用于由SnTaO合成焦绿石H Ta O，突出了该方法的通用性。
