Fabrication of CuInSe2 quantum dots sensitized TiO2 nanotube arrays for enhancing visible light photoelectrochemical performance. (10th June 2015)

• Record Type: Journal Article
• Authors: Wang, Qingyao; Qiao, Jianlei; Zhou, Jie; Gao, Shanmin
• Is Part Of: Electrochimica acta. Volume 167(2015)
• Page Start: 470
• Page End: 475
• Publication Date: 2015-06-10
• Subjects: TiO2 nanotube arrays -- Successive ionic layer absorption and reaction -- CuInSe2 quantum dot -- Photoelectrochemical performance.; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2014.08.037
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: The CuInSe2 quantum dots sensitization of TiO2 NTs was carried out by a successive ionic layer absorption and reaction method using Cu(Ac)2, InCl3 as precursors at different deposition Cu/In molar ratio. The TiO2 NTs/CISe largely enhanced the visible spectrum absorption, photocurrent response and degradation of rhodamine B under visible light irradiation. Highlights: CuInSe2 QDs-sensitized TiO2 nanotube arrays was prepared. CuInSe2 QDs with diameter of 9 nm was decorated onto the outer and inner surface of the TiO2 NTs. The TiO2 NTs/CISe largely enhanced the photocurrent response and degradation of rhodamine B under visible light irradiation. Abstract: The CuInSe2 quantum dots (CuInSe2 QDs) sensitization of TiO2 nanotube arrays (TiO2 NTs/CISe) was carried out by a successive ionic layer absorption and reaction (SILAR) method using Cu(Ac)2 and InCl3 as precursors at different Cu/In molar ratio. The deposition of CuInSe2 QDs on the upper and inner surface of the TiO2 NTs was confirmed by field emission scanning electron and transmission electron microscopes. UV-vis absorption and photoelectrochemical measurements indicated that the CuInSe2 QDs sensitization extended the visible light absorption and photocurrent response. The results also showed that TiO2 NTs/CISe largely enhanced the photocatalytic degradation of methyl orange (MO) under visible light irradiation, and showed the excellent activity and stability.