摘要
以氧化石墨烯和ZnAc2为反应前驱物,采用二甲基亚砜(DMSO)作为硫源和反应溶剂,通过一步溶剂热法原位制备出负载ZnS的还原氧化石墨烯(RGO)复合材料(ZnS/RGO)。采用SEM、XRD、激光拉曼(Raman)和荧光光谱对样品的微观形貌和化学结构进行表征。结果显示:原位反应制备的ZnS/RGO复合材料是由呈圆球状并均匀负载的纳米ZnS和6~7层RGO层状结构组成;在模拟紫外光照射下,对甲基橙污染物的光催化结果表明,ZnS/RGO复合材料的降解效率明显高于纯ZnS;同时,在多次循环催化过程中,ZnS/RGO复合材料的光催化效率仍基本保持不变,表明原位反应使ZnS与RGO结合增强。荧光光谱结果表明,ZnS/RGO复合材料光催化效率增强的主要原因在于ZnS中光生电子通过RGO得到有效的分离,进而延长了电子-空穴的复合效率。
ZnS decotrated onto reduced graphene oxide（RGO） composite （ZnS/RGO） had been synthesized through one step in-situ solvothermal reaction using ZnAc2 and graphene oxide as reaction precursor and dimethyl sulfoxide （DMSO） as a source of sulfur and reaction solvent. SEM.XRD.Raman and fluorescence spectroscopy had been used to characterize microtopography and chemical structure of ZnS and ZnS/RGO. The results show that the ZnS/RGO composite synthesized through iwsitu reaction consists of uniformly decorated spherical ZnS particles and 6-7 laye; structured RGO sheets. Under the simulated ultraviolet irradiation, the photocatalytic results for methyl orange pollutants show that the degradation ratio of ZnS/RGO hybrid is remarkly higher than that of pure ZnS. During the recycling degradation process photocatalytic efficiency of ZnS/RGO remain stable, which demonstrates in-situ reaction enhance the interaction between ZnS and RGO. Fluorescence spectroscopy result shows enchanted photocatalytic degradation efficiency of ZnS/RGO hybrid is mainly attributed to in-situ incorporation of ZnS with RGO sheets, which can efficiently transfer the excited photoelectrons from ZnS to conjugated graphene structures, and further en larges recombination efficiency of photogenergated electron-hole.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2017年第5期1082-1087,共6页
Acta Materiae Compositae Sinica
基金
河南省科技攻关项目(172102310478)
许昌市科技攻关项目(2016-8)
河南省科技创新人才计划(174100510014)
