Effect of PVP content on photocatalytic properties of CuSbS 2 particles with chemical etching
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RESEARCH PAPER
Effect of PVP content on photocatalytic properties of CuSbS2 particles with chemical etching Wei Wang & Guowei Zhi & Jijinhua Liu & Lingyun Hao & Lu Yang & Yijie Zhao & Yingfei Hu
Received: 23 March 2020 / Accepted: 15 September 2020 / Published online: 22 September 2020 # Springer Nature B.V. 2020
Abstract In the paper, the effects of polyvinylpyrrolidone (PVP) concentration and chemical wet etching on morphologies and phase composition of CuSbS2 particles synthesized by microwave irradiation method were investigated. The phase structure, morphologies, and optical and photocatalytic properties were analyzed by using characterization techniques. The results showed that the morphology of as-prepared particles was spherical and the shape of particles etched in Na2S solution was tetragonal rod-like structure. The optical band gap of the particles with 1.5 g PVP after chemical etching was about 1.41 eV. The photocatalytic performance of CuSbS2 could be significantly improved after Na2S chemical etching. The amounts of PVP had an obvious influence on specific surface area of as-synthesized CuSbS2 particles. The CuSbS2 particles with 1.5 g PVP had the best photocatalytic performance after chemical etching treatment, and the C/C0 value reached 0.36.
W. Wang : G. Zhi : J. Liu : L. Hao : L. Yang : Y. Zhao : Y. Hu School of Materials Engineering, Jinling Institute of Technology, Nanjing 211169, People’s Republic of China W. Wang : G. Zhi : J. Liu : L. Hao (*) : L. Yang : Y. Zhao : Y. Hu Nanjing Key Laboratory of Optometric Materials and Technology, Nanjing 211169, People’s Republic of China e-mail: [email protected]
Keywords CuSbS2 particles . Microwave irradiation method . Chemical etching . Photocatalytic performance . Nanostructures
Introduction With the rapid development of society, energy and environment issues become increasingly prominent. Recently, ternary copper antimony sulfide materials have been widely concerned due to potential applications in photovoltaics (Xue et al., 2015), thermoelectrics (Skoug et al., 2011), wastewater treatment (Bouaniza et al., 2018), and hydrogen production (Su et al., 2018), owing to their low cost, non-toxicity, and earth-abundant elements. According to reports (Welch et al., 2015), ternary copper antimony sulfide materials have four stable phases such as CuSbS 2 , Cu 3SbS 4, Cu3 SbS 3, and Cu12Sb4S13. Among these ternary compounds, CuSbS2 material is a semiconductor with high absorption coefficient (> 105 cm−1) and ideal optical band gap (1.38– 1.66 eV) (Zhou et al., 2009; Rastogi & Janardhana, 2014). Therefore, CuSbS2 has a great potential for applications in thin film solar cells and photocatalysis. So far, several attempts have been made to fabricate CuSbS 2 thin film solar cells and CuSbS 2 -based photoanode. In photovoltaic applications, Banu et al. (Banu et al., 2016) reported a hybrid ink method process to prepare CuSbS2 thin films and achieved 3.22% efficient solar cells, which is the highest efficiency reported for CuSbS2 solar cells. And in photoelectroch
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