采用一锅法制备具有可见光活性的还原氧化石墨烯(rGO)/ZnO纳米复合材料,将其应用于光催化降解罗丹明B(RhB),并获得了优异的降解效果。结果表明:该复合材料具有六方纤锌矿结构,rGO均匀包覆在ZnO上,表面光滑呈现出颗粒及不规则片状。rGO/ZnO对RhB的降解率为97.8%,催化活性优于单独的ZnO。自由基捕获实验表明,光催化降解RhB的活性物种主要是·OH-和·O-2,并由此推测了光催化降解机理。
Reduced graphene oxide (rGO)/ZnO nanocomposites with visible light activity were prepared by one pot method,which were applied to photocatalytic degradation of rhodamine B(RhB),and excellent degradation effects were obtained.The research results showed that the composite had a hexagonal wurtzite structure,rGO was uniformly coated on ZnO,and the surface was smooth,showing particles and irregular flakes.The photocatalytic results indicated that the degradation rate of RhB by rGO/ZnO was 97.8%,and the catalytic activity was better than that of ZnO alone.Radical trapping experiments revealed that the main active species for photocatalytic degradation of RhB were ·OH- and ·O-2,and the photocatalytic degradation mechanism was inferred accordingly.
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基金资助
国家自然科学基金(21868036和32061133005);天山青年计划项目(2020Q011)
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