摘要
石墨烯气凝胶既有石墨烯材料固有的柔性及优异的电学、力学性能,同时又具有高比表面积、低密度、大孔隙率等特点,其独特的三维结构有利于引入其他功能材料,从而赋予复合材料更为优异的性能。原卟啉分子具有高度共轭结构,并且与金属离子配位结合后可发挥催化功能。鉴于此,本工作利用原卟啉分子与石墨烯片层的π-π相互作用,在石墨烯气凝胶上组装一定浓度的原卟啉分子,从而制备了石墨烯/卟啉复合气凝胶材料。该方法工艺简单,容易操作。本工作分析了复合气凝胶材料的微观形貌和成分组成,研究了原卟啉分子的组装对石墨烯气凝胶导电性能的影响,以及石墨烯/卟啉复合气凝胶对硝酸根离子(NO_(3)^(-))的检测作用。研究结果表明所制备的复合材料具有均匀的三维多孔结构,原卟啉分子的引入可以显著降低石墨烯气凝胶的电阻,而三维气凝胶结构可以有效地实现原卟啉与石墨烯的复合并实现对NO3-的灵敏检测。
Graphene aerogel not only has the inherent flexibility,excellent electrical and mechanical properties of graphene,but also has the characteristics of high specific surface area,low density,and large porosity.Its unique three-dimensional structure is very conducive to the introduction of other functional materials,thus giving the composite materials more excellent performance.Protoporphyrin possesses a highly conjugated structure and can make full use of the catalytic function after combining with the metal ions.Based on this,theπ-πinteraction between graphene and protoporphyrin was used in this work.The protoporphyrin with a certain concentration was assembled on the graphene aerogel,which contributed to the fabrication of the graphene/porphyrin composite aerogel materials.The process is simple and easy to operate.The micro-morphology and composition of the composites were analyzed in this work.The effect of the assembly of protoporphyrin on the conductivity of graphene aerogel and the detection function for NO_(3)^(-)of the graphene/porphyrin composite aerogel materials were studied.The results show that the prepared composites have a uniform three-dimensional porous structure,and the resistance of the graphene aerogel is reduced obviously after the introduction of protoporphyrin molecules.The three-dimensional aerogel structure can effectively realize the composite of protoporphyrin with graphene and achieve the sensitive detection of NO_(3)^(-).
作者
王健阳
马颖
李思仪
李天微
王秀梅
万晔
郜思同
郭惠琳
韦杰
WANG Jianyang;MA Ying;LI Siyi;LI Tianwei;WANG Xiumei;WAN Ye;GAO Sitong;GUO Huilin;WEI Jie(School of Materials Science and Engineering,Shenyang Jianzhu University,Shenyang 110168,China)
出处
《材料导报》
CSCD
北大核心
2023年第16期242-246,共5页
Materials Reports
基金
辽宁省教育厅项目(lnzd201905,lnzd202006,lnjc202016)
辽宁省科技厅项目(20180510017)。
关键词
直写打印技术
石墨烯气凝胶
原卟啉
复合材料
硝酸根离子检测
direct write printing technology
graphene aerogel
protoporphyrin
composite materials
NO_(3)^(-)detection
