Improving photoelectric performance of MoS2 photoelectrodes by annealing. Issue 17 (1st December 2018)

• Record Type: Journal Article
• Authors: Si, Keyu; Ma, Jingyao; Guo, Yaohui; Zhou, Yixuan; Lu, Chunhui; Xu, Xiang; Xu, Xinlong
• Is Part Of: Ceramics international. Volume 44:Issue 17(2018)
• Page Start: 21153
• Page End: 21158
• Publication Date: 2018-12-01
• Subjects: MoS2 -- Photoelectric response -- Liquid phase exfoliation -- Annealing -- Photoelectrochemistry; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.08.160
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Semiconductor photoelectrochemistry (PEC) technology has attracted wide interest as it not only reveals the photoelectric properties of advanced materials, but also promotes energy conversion from the sunlight based on these materials. Herein, we investigated photoelectric properties of annealed and unannealed liquid phase exfoliated few-layer molybdenum disulfide (MoS2 ) photoelectrodes by PEC measurement. The linear sweep voltammograms and photoelectric response I-t curves demonstrate enhanced performance of MoS2 films after annealing. Nyquist impedance and Bode phase plots demonstrate a higher charge transfer property and a longer charge lifetime after annealing. The enhancement due to annealing could come from the increase of the crystalline and compact density of MoS2 nano-sheets, which is proved by X-ray diffraction and Raman spectroscopy in line with the absorption spectroscopy. Our results pave the way for the improvement of two-dimensional material based photoanodes for high performance of PEC applications by a simple method.