Firstly,using ammonium cerium nitrate as cerium source and ammonium thiomolybdate as sulfur and molybdenum source,CeO2 nanoparticles were prepared by hydrothermal method.Then the CeO2-MoS2 nanocomposites with abundant oxygen vacancies were further synthesized via hydrothermal method.The analyses of TEM,XRD and Raman demonstrated that CeO2 nanoparticles were successfully loaded on MoS2 nanosheets to form heterojunction structures.The results of photoelectric performance tests revealed that CeO2-MoS2 nanocomposites exhibited a good photoelectric stability.The formation of heterojunctions between CeO2 and MoS2 could effectively inhibit the recombination of photogenerated electron-hole pairs,thus improving their photoelectric properties.The detection of active oxygen species generated by different materials via Pass DPBF,NBT and SIM-S methods showed that,compared with nCeO2 and nMoS2,CeO2-MoS2 produced more singlet oxygen,hydrogen peroxide and superoxide anion under the irradiation of ultraviolet,visible and near-infrared light.Therefore,this study could provide a valuable reference for the application of CeO2-MoS2 in photocatalytic and antibacterial fields.
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基金资助
国家自然科学基金面上项目(52071277)
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