文献类型：期刊文献

英文题名：A ZnO/ZnFe2O4 uniform core-shell heterojunction with a tubular structure modified by NiOOH for efficient photoelectrochemical water splitting

作者：Lan, Yayao[1];Liu, Zhifeng[1,2];Guo, Zhengang[1];Li, Xifei[3];Zhao, Lei[4];Zhan, Li[5];Zhang, Min[5]

第一作者：Lan, Yayao

通讯作者：Liu, ZF[1];Liu, ZF[2]

机构：[1]Tianjin Chengjian Univ, Sch Mat Sci & Engn, Tianjin 300384, Peoples R China;[2]Tianjin Chengjian Univ, Tianjin Key Lab Aquat Sci & Technol, Tianjin 300384, Peoples R China;[3]Xian Univ Technol, Inst Adv Electrochem Energy, Xian 710048, Shaanxi, Peoples R China;[4]Xinxiang Univ, Sch Civil Engn & Architecture, Xinxiang 453003, Peoples R China;[5]Logist Univ Chinese Peoples Armed Police Forces, Tianjin 300309, Peoples R China

第一机构：Tianjin Chengjian Univ, Sch Mat Sci & Engn, Tianjin 300384, Peoples R China

通讯机构：[1]corresponding author), Tianjin Chengjian Univ, Sch Mat Sci & Engn, Tianjin 300384, Peoples R China;[2]corresponding author), Tianjin Chengjian Univ, Tianjin Key Lab Aquat Sci & Technol, Tianjin 300384, Peoples R China.

年份：2018

卷号：47

期号：35

起止页码：12181-12187

外文期刊名：DALTON TRANSACTIONS

收录：;EI(收录号：20183805846000);Scopus(收录号：2-s2.0-85053476996);WOS:【SCI-EXPANDED(收录号:WOS:000444400200018)】；

基金：The authors gratefully acknowledge financial support from the Science Funds of Tianjin for Distinguished Young Scholar (No. 17JCJQJC44800), the Natural Science Foundation of Tianjin (No. 16JCYBJC17900 and No. 15JCYBJC28600) and the Science and Technology Project of Henan Province (No. 182106000029).

语种：英文

外文关键词：Energy gap - Etching - Heterojunctions - II-VI semiconductors - Light absorption - Narrow band gap semiconductors - Nickel compounds - Oxide minerals - Photoelectrochemical cells - Shells (structures) - Water absorption - Zinc oxide

摘要：It is known that heterojunction photoelectrodes can improve light absorption and accelerate the separation of photogenerated carriers in the field of photoelectrochemical (PEC) water splitting. However, the key to efficient photoelectrochemical performance is to build heterojunctions with a narrow band gap semiconductor loaded on a wide band gap semiconductor uniformly and densely. Herein, a ZnO/ZnFe2O4 uniform core-shell heterojunction photoelectrode is prepared by a simple ion etching method. Moreover, the chemical reaction process and mechanism are discussed in detail. The ZnO/ZnFe2O4 photoelectrode shows a higher photocurrent density (0.29 mA cm(-2) at 1.23 V vs. RHE) compared with that of ZnO (0.17 mA cm(-2) at 1.23 V vs. RHE). Furthermore, the PEC performance of ZnO/ZnFe2O4 is optimized by depositing NiOOH; the photocurrent density of ZnO/ZnFe2O4/NiOOH is 0.48 mA cm(-2) at 1.23 V vs. RHE. The remarkable PEC performance of ZnO/ZnFe2O4/NiOOH benefits from the following important factors: (i) the uniformity and nanotube structure of the ZnO/ZnFe2O4 heterojunction; (ii) the excellent light harvesting ability; and (iii) the reduced photogenerated electron-hole pair recombination rate. This work provides new insights into designing heterojunction systems for efficient photoelectrochemical water splitting.