文献类型：期刊文献

英文题名：EFFECT OF SYNTHESIZED CARBON QUANTUM DOTS ON THE PHOTOCATALYTIC PROPERTIES OF ZnO

作者：Williams, Irie Bi Irie[1,2];Fodjo, Essy Kouadio[2];Narcisse, Pomi Bi Boussou[2];Martin, Aka Alla[2];Sylvestre, Koffi Koffi Kra[2];Albert, Trokourey[2];Gu, Zhen[1]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Control & Optimizat Chem Proc, Minist Educ, Shanghai 200237, Peoples R China;[2]Univ Felix Houphouet Boigny, Lab Constitut & React Matter, UFR SSMT, 22 BP 582, Abidjan, Cote Ivoire

年份：2023

卷号：37

期号：2

起止页码：463

外文期刊名：BULLETIN OF THE CHEMICAL SOCIETY OF ETHIOPIA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000920407100015)】；

语种：英文

外文关键词：Fluorescent carbon quantum dots (CQDs); Photocatalytic degradation of methylene blue; Sunlight reflectance property; Synthesis of ZnO nanoparticles

摘要：In this work, synthesized carbon quantum dots (CQDs) and zinc oxide nanoparticles (ZnO NPs) are used to form ZnO/CQDs nanocomposite. The characterization of this nanocomposite using X-ray diffraction (XRD) indicates that ZnO NPs and ZnO/CQDs nanocomposite have the same profile, suggesting that the presence of CQDs does not impinge the crystal structure of ZnO in ZnO/CQDs nanocomposite. Besides, an analysis performed with scanning electron microscopy (SEM) displays plate-like nanostructure with an average thickness of about 22 nm and 25 nm for ZnO NPs and ZnO/CQDs, respectively. Furthermore, the reflectance study in the visible range shows a reduction of sunlight reflection intensity of ZnO/CQDs compared with the reflection intensity of ZnO NPs. In addition, the photocatalytic studies indicate that the rate of photocatalytic degradation of methylene blue (MB) of ZnO/CQDs nanocomposites is higher than that of ZnO NPs. Indeed, in optimized conditions, the photocatalytic activity can reach 100% within 45 min of sunlight exposure for the degradation of 7.5 mg/L MB using ZnO/CQDs while it takes 90 min using ZnO NPs under the same conditions. These fascinating results is attributed to the reduction of the reflective properties of ZnO/CQDs.