杂原子掺杂石墨烯量子点的介质阻挡放电合成法及其发光特性研究

项目名称： 杂原子掺杂石墨烯量子点的介质阻挡放电合成法及其发光特性研究

项目编号： No.21505102

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 高分子科学

项目作者： 申丽华

作者单位： 西安科技大学

项目金额： 21万元

中文摘要： 本项目提出采用介质阻挡放电（DBD）微等离子体法合成杂原子掺杂石墨烯量子点(GQDs)，结合荧光特性，研究其电化学发光和化学发光特性。构建DBD放电装置，将碳源和杂原子源放电掺杂合成GQDs。利用DBD 放电模式具有简单方便，放电温和，快速，低能耗等优势，有效控制放电时间和等离子体密度，控制元素掺杂量，组合多元素掺杂，表面基团功能化和掺杂元素协同掺杂，筛选量子产率高，发射波长可以调谐到近红外光区的GQDs。利用AFM,TEM, XPS，元素分析仪等表征手段，探究掺杂元素对荧光特性影响的规律。研究GQDs作为发光体的电化学发光特性及化学发光特性；比较掺杂元素对GQDs荧光特性和电化学发光特性影响的差异；以细胞里的无机离子和生物小分子为分析物，建立灵敏度高，选择性好的GQDs检测无机离子和小分子光学分析方法。这项研究有助于丰富发光理论，为GQDs的生物成像分析提供新的思路和方法。

中文关键词： 石墨烯量子点；介质阻挡放电；荧光；电化学发光；化学发光

英文摘要： Combing with fluorescence characteristics investigation of heteroatom doping of graphene quantum dot (GQDs) , the project aims to investigate the electrochemiluminescence and chemiluminescence behaviors of GQDs, which was obtained based on the dielectric barrier discharge (DBD) microplasma. Taking advantage of simple equipment, mild discharge, fast reaction and low consumption, a DBD discharge device will be developed to get GQDs by carbon source and heteroatom source. GQDs with high quantum yield, good water solubility, good stability, and emission wavelength can be tuned to near infrared region, which can be obtained by controlling the discharge time, density of the plasma, the doping concentration or doping multielement, or combining with surface passivation with functional groups. The dependence of doping elements on the fluorescence characteristics will be explored by means of the characterization of AFM, TEM, XPS, elemental analyzer. The eletrochemiluminescence and chemiluminescence behaviors of GQDs acting as a luminophore will be investigated. Comparison the difference of the effect of doping on the florescence with on the electrochemiluminescence. New methods for the determination of inorganic ion or biological molecules in the cells based on luminescence behaviors of GQDs will be developed with improved sensitivity and selectivity. This study is help to enrich the theory of luminescence, and can provide new ideas for the potential application in biological imaging of GQDs.

英文关键词： grapheme quantum dot;dielectric-barrier discharge ;flurenscence;electrochemiluminescence;chemiluminescence