TiO2/CuS heterostructure nanowire array photoanodes toward water oxidation: The role of CuS

Jia, Shufan1; Li, Xinyu1; Zhang, Boping1; Yang, Jing1; Zhang, Suwei1; Li, Shun2,3; Zhang, Zuotai3

2019-01

10.1016/j.apsusc.2018.09.003

APPLIED SURFACE SCIENCE   影响因子和分区

0169-4332

1873-5584

Photoelectrochemical (PEC) water splitting represents a very attractive approach for the production of clean hydrogen by converting solar energy into chemical energy. However, their performance is limited by poor charge carrier separation and transportation. In this work, TiO2/CuS heterostructure nanowire array photoanodes were fabricated by decorating CuS nanoclusters on TiO2 nanowire arrays grown on conductive substrate via a successive ionic layer adsorption and reaction (SILAR) method. Results indicate that the CuS content increases with repeating the SILAR procedure. The PEC performance of the TiO2 nanowire array photoanodes is enhanced after loading CuS nanoclusters, and the TiO2/CuS-5 (i.e., repeating the SILAR process for 5 times) sample exhibits the highest photocurrent density. The enhancement of PEC activity is attributed to increased light absorption and efficient charge separation with an optimum CuS coverage on the TiO2 nanowire arrays. Importantly, further analysis reveals a reduction of partial CuS to Cu2S during the PEC process, indicating that the CuS nanoclusters are mainly acting as co-catalyst to transfer photogenerated electrons.

TiO2 nanowire array CuS nanoclusters Heterostructure SILAR Photoelectrochemical

SCI ; EI

英语

通讯

National Key Research and Development Program of China[2018YFB0703603]

Chemistry ; Materials Science ; Physics

Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter

WOS:000452782100093

ELSEVIER SCIENCE BV

20183705794903

Electrochemistry ; Heterojunctions ; Light absorption ; Nanoclusters ; Nanowires ; Photoelectrochemical cells ; Solar energy ; Solar power generation ; Titanium dioxide

Solar Power:615.2 ; Solar Energy and Phenomena:657.1 ; Electric Batteries:702.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Nanotechnology:761 ; Electrochemistry:801.4.1 ; Inorganic Compounds:804.2 ; Solid State Physics:933

MATERIALS SCIENCE

Web of Science

1.Univ Sci & Technol Beijing, Beijing Key Lab New Energy Mat & Technol, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
2.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Guangdong Prov Key Lab Soil & Groundwater Pollut, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China

Jia, Shufan,Li, Xinyu,Zhang, Boping,et al. TiO2/CuS heterostructure nanowire array photoanodes toward water oxidation: The role of CuS[J]. APPLIED SURFACE SCIENCE,2019,463:829-837.

Jia, Shufan.,Li, Xinyu.,Zhang, Boping.,Yang, Jing.,Zhang, Suwei.,...&Zhang, Zuotai.(2019).TiO2/CuS heterostructure nanowire array photoanodes toward water oxidation: The role of CuS.APPLIED SURFACE SCIENCE,463,829-837.

Jia, Shufan,et al."TiO2/CuS heterostructure nanowire array photoanodes toward water oxidation: The role of CuS".APPLIED SURFACE SCIENCE 463(2019):829-837.