Simple Fabrication of SnO2 Quantum‐dot‐modified TiO2 Nanorod Arrays with High Photoelectrocatalytic Activity for Overall Water Splitting. Issue 20 (8th August 2018)

• Record Type: Journal Article
• Authors: Zhang, Yingguang; Lin, Qun; Tong, Na; Zhang, Zizhong; Zhuang, Huaqiang; Zhang, Xiaoyan; Ying, Wang; Zhang, Hongwen; Wang, Xuxu
• Is Part Of: Chemphyschem. Volume 19:Issue 20(2018)
• Page Start: 2717
• Page End: 2723
• Publication Date: 2018-08-08
• Subjects: nanorod arrays -- photoelectrochemistry -- quantum dots -- titanium dioxide -- water splitting; Chemistry, Physical and theoretical -- Periodicals; 541.05
• DOI: 10.1002/cphc.201800519
• Languages: English
• ISSNs: 1439-4235

Abstract

Abstract: 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 SnO2 quantum dots (QDs) modified TiO2 nanorod arrays (NAs) by the calcination of SnCl2 ‐adsorbed TiO2 NAs. The photocurrent density of SnO2 QDs/TiO2 NAs exhibits about 5 times higher than that of parent TiO2 NAs at a bias of 0.4 V vs. Ag/AgCl. SnO2 QDs/TiO2 NAs also show a high photoelectrocatalytic activity for overall water splitting with an actual yield of H2 and O2 to be 27.85 and 11.87 μmol cm −2 h −1, 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. Abstract : SnO2 quantum‐dot‐modified TiO2 nanorod arrays prepared by a simple in situ method exhibit an excellent photoelectrochemical water‐splitting activity.