In this work, Ag3PO4/In2S3 nanocomposites with low loading of In2S3 (5-15 wt %) are fabricated by two step chemical precipitation approach. The microstructure, composition and improved photoelectrochemical properties of the asprepared composites are studied by X-ray diffraction pattern (XRD), field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), photocurrent density, EIS and amperometric i-t curve analysis. It is found that most of In2S3 nanoparticles are deposited on the surfaces of Ag3PO4. The as-prepared Ag3PO4/ In2S3 composite (10 wt%) is selected and investigated by SEM and TEM, which exhibits special morphology consisting of lager size substrate (Ag3PO4), particles and some nanosheets (In2S3). The introduction of In2S3 is effective at improving the charge separation and transfer efficiency of Ag3PO4/In2S3, resulting in an enhancement of photoelectric behavior. The origin of the enhanced photoelectrochemical activity of the In2S3-modified Ag3PO4 may be due to the improved charge separation, photocurrent stability and oriented electrons transport pathways in environment and energy applications.

Abstract
1. Introduction
2. Experimental Details
    2.1 Materials
    2.2 Sample preparation
    2.3 Characterization
    2.4 Photoelectric Conversions
3. Results and Discussion
    3.1 Phase and morphology
    3.2 Chemical state
    3.3 Photoelectrochemical performance
4. Conclusion
References

• Yi-Kai Zeng(Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology)
• Shenyu Bo(Suzhou Taicang Ecological Environment Bureau, Taicang City)
• Jun-hui Wang(Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology)
• Bin Cui(Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology)
• Lei Zhu(Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology/Department of Advanced Materials Science & Engineering, Hanseo University)
• Won-Chun Oh(Department of Advanced Materials Science & Engineering, Hanseo University) Corresponding author
• Hao Gu(Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology)