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采用多元醇沉淀以及光化学还原法制备了SiO2担载AgCl:Ag等离子体纳米粒子。通过表征发现SiO2@AgCl:Ag粒子呈立方-四足角状。同时,由于表面Ag簇的等离子共振效应,该催化剂在可见光区有很强的光吸收,可用于高效降解稳定的有机染料,例如,罗丹明B。合成的SiO2@AgCl:Ag复合催化剂可在2 min内将罗丹明B分子完全降解。自由基捕获实验进一步探究发现O2.-和.OH是参与降解反应的主要氧化活性物种。以上SiO2@AgCl:Ag的这些特性使其在水净化和环境治理方面有着潜在的应用。
SiO2 supported AgCl: Ag plasma nanoparticles were prepared by poly-alcohol precipitation and photochemical reduction. It was found by characterization that SiO2 @ AgCl: Ag particles were cuboidal - tetragon angular. At the same time, due to the plasmon resonance effect of surface Ag clusters, the catalyst has strong light absorption in the visible region and can be used to efficiently degrade stable organic dyes, such as rhodamine B. The synthesized SiO2 @ AgCl: Ag composite catalyst can completely degrade rhodamine B molecule in 2 min. Further investigation of free radical trapping experiments revealed that O2.- and .OH are the major oxidative active species involved in the degradation reaction. These characteristics of the above SiO2 @ AgCl: Ag make it potentially useful in water purification and environmental management.