摘要
通过改进传统的溶胶-凝胶法,以乙酸锌为前驱物并优化反应温度,经水解缩聚胶化、加热反应和化学沉淀而得到氧化锌量子点(ZnO QDs).为改善量子点的光稳定性,以3-氨丙基三乙氧基硅烷(APTMS)作为修饰剂对量子点进行氨基功能化.采用TEM、UV、PL、XRD、FTIR等技术对量子点进行表征,重点考察了pH对量子点荧光强度的影响.实验结果表明,氨基功能化氧化锌量子点(ZnO-NH_(2)QDs)的荧光强度随pH降低而减小,在pH为7.0的水溶液中荧光强度最强.
Using zinc acetate as the precursor and optimizing reaction temperature,zinc oxide quantum dots(ZnO QDs)were obtained based on improving the traditional sol-gel method by hydrolyzed polycondensation gelation,heating reaction,and chemical precipitation.Then,3-aminopropyltriethoxysilane(APTMS)was used as a modifier to complete the amino-functionalization of the quantum dots to obtain amino-functionalized zinc oxide quantum dots(ZnO-NH_(2)QDs)in order to improve its photostability.The prepared quantum dots were characterized by TEM,UV,PL,XRD,FTIR and other techniques.We focused on the effect of pH on the fluorescence intensity of quantum dots.The experimental results show that the fluorescence intensity of amino-functionalized zinc oxide quantum dots(ZnO-NH_(2)QDs)decreases with the decrease of pH value,and the fluorescence intensity is the highest in the solution with pH value of 7.0.
作者
张普雯
刘春晴
钱昱彤
张文静
潘文轩
张旭
赵彦保
ZHANG Puwen;LIU Chunqing;QIAN Yutong;ZHANG Wenjing;PAN Wenxuan;ZHANG Xu;ZHAO Yanbao(Henan University,School of Pharmacy,Henan Kaifeng 475004,China;Henan University,Engineering Research Center for Nanomaterials,Henan Kaifeng 475004,China)
出处
《河南大学学报（自然科学版）》
CAS
2023年第1期60-66,共7页
Journal of Henan University:Natural Science
基金
开封市科技局科技攻关(农业)项目(2202002)
河南大学大学生创新创业训练计划项目(20211020002)
2020年度河南省博士后科研启动项目(K21045Y)
关键词
氧化锌量子点
功能化
荧光性能
zinc oxide quantum dots
functionalization
fluorescence properties
