Adsorption and desorption mechanisms on graphene oxide nanosheets: Kinetics and tuning

作     者：Xiaodan Qu Qiong Hu Zhongqian Song Zhonghui Sun Baohua Zhang Jialing Zhong Xuyou Cao Yuanjin Liu Bolin Zhao Zhenbang Liu Yujie Shen Yu Bao Zhenxin Wang Yuwei Zhang Li Niu 

作者机构：Center for Advanced Analytical Sciencec/o School of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhou 510006China State Key Laboratory of Electroanalytical ChemistryChangchun Institute of Applied ChemistryUniversity of Science and Technology of ChinaChangchun 130022China School of Civil EngineeringGuangzhou UniversityGuangzhou 510006China University of Science and Technology of ChinaHefei 230026China 

出 版 物：《The Innovation》 (创新（英文）)

年 卷 期：2021年第2卷第3期

页      面：79-85页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：This work was funded by the Research&Development Projects in Key Areas of Guangdong Province,China(2019B010933001) the National Natural Science Foundation of China(21974033,21904026) the National Basic Research Program of China(973 Program,2017YFE0197900) the Innovation Training Program for College Students of Guangzhou University(CX2019185) 

主　　题：adsorption desorption fluorescence microscopy graphene oxide carbon dots 

摘      要：A knowledge of the adsorption and desorption behavior of sorbates on surface adsorptive site(SAS)is the key to optimizing the chemical reactivity of ***,direct identification of the chemical reactivity of SASs is still a challenge due to the limitations of characterization ***,we present a new pathway to determine the kinetics of adsorption/desorption on SASs of graphene oxide(GO)based on total internal reflectance fluorescence *** switching on and off of the fluorescent signal of SAS lit by carbon dots(CDs)was used to trace the adsorption process and desorption *** find that sodium pyrophosphate(PPi)could increase the adsorption equilibrium of CDs thermodynamically and promote the substrate-assisted desorption pathway *** the single turnover level,it was disclosed that the species that can promote desorption may also be an adsorption *** discovery provides significant guidance for improving the chemical reactivity of the heterogeneous catalyst.