用于全分解水的具有高光电催化活性的SnO量子点修饰TiO纳米棒阵列的简易制备
Simple Fabrication of SnO Quantum-dot-modified TiO Nanorod Arrays with High Photoelectrocatalytic Activity for Overall Water Splitting.
作者信息
Zhang Yingguang, Lin Qun, Tong Na, Zhang Zizhong, Zhuang Huaqiang, Zhang Xiaoyan, Ying Wang, Zhang Hongwen, Wang Xuxu
机构信息
State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis College of Chemistry, Fuzhou University, Fuzhou, 350116, China.
Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China.
出版信息
Chemphyschem. 2018 Oct 19;19(20):2717-2723. doi: 10.1002/cphc.201800519. Epub 2018 Aug 8.
Photoelectrochemical (PEC) water splitting has been demonstrated as a promising way to acquire clean hydrogen energy. However, the efficiency has been limited by the high recombination rate of photogenerated electron-hole pairs. Herein, we provided a simple approach to construct a novel SnO quantum dots (QDs) modified TiO nanorod arrays (NAs) by the calcination of SnCl -adsorbed TiO NAs. The photocurrent density of SnO QDs/TiO NAs exhibits about 5 times higher than that of parent TiO NAs at a bias of 0.4 V vs. Ag/AgCl. SnO QDs/TiO NAs also show a high photoelectrocatalytic activity for overall water splitting with an actual yield of H and O to be 27.85 and 11.87 μmol cm h , respectively. The excellent performance of photoanode for PEC water splitting could be attributed to its Z-scheme heterostructure for good separation efficiency and transport rate of photogenerated charge carries.
光电化学（PEC）水分解已被证明是获取清洁氢能的一种有前景的方法。然而，光生电子 - 空穴对的高复合率限制了其效率。在此，我们提供了一种简单的方法，通过对吸附了SnCl的TiO纳米棒阵列（NAs）进行煅烧，构建一种新型的SnO量子点（QDs）修饰的TiO纳米棒阵列（NAs）。在相对于Ag/AgCl为0.4 V的偏压下，SnO量子点/TiO纳米棒阵列的光电流密度比原始TiO纳米棒阵列高约5倍。SnO量子点/TiO纳米棒阵列对整体水分解也表现出高光电催化活性，H和O的实际产率分别为27.85和11.87 μmol·cm²·h⁻¹。PEC水分解光阳极的优异性能可归因于其Z型异质结构，该结构具有良好的光生电荷载流子分离效率和传输速率。
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