纳米金@石墨烯复合多孔材料还原4-硝基苯酚  

Reduction of 4-nitrophenol with nano-gold@graphene composite porous material

作　　者：张承昕 徐昊 王余莲[1] 安明艳 王宇 袁志刚[1] 张武[1] 李闯 郭明忠 苏德生 ZHANG Chengxin;XU Hao;WANG Yulian;AN Mingyan;WANG Yu;YUAN Zhigang;ZHANC Wu;LI Chuang;CUO Minghong;SU Desheng(School of Materials Science and Engineering,Shenyang Ligong University,Shenyang 110159,China;Yantai Division of the 52nd Research Institute of China North Industries Group,Yantai 264003,China;Liaoning Dan Carbon Group Corporation Limited,Dandong 118100,China;Liaoning Province Ultra-high Power Graphite Electrode Material Professional Technology Innovation Center,Dandong 118100,China)

机构地区：[1]沈阳理工大学材料科学与工程学院,辽宁沈阳110159 [2]中国兵器工业集团第五二研究所烟台事业部,山东烟台264003 [3]辽宁丹炭科技集团有限公司,辽宁丹东118100 [4]辽宁省超高功率石墨电极材料专业技术创新中心,辽宁丹东118100

出　　处：《中国粉体技术》2023年第4期80-93,共14页China Powder Science and Technology

基　　金：国家自然科学基金项目,编号:51804200;辽宁省教育厅科学研究青年人才项目,编号:LJKZ0246;辽宁省科技厅应用基础研究计划项目,编号:2022JH2/101300111;沈阳市科技计划项目,编号:22-322-3-03;沈阳理工大学2021年引进高层次人才科研支持经费项目,编号:1010147001011。

摘　　要：以负载纳米金颗粒的还原石墨烯(APR)为二维模板,采用溶剂编织法在石墨烯表面成功构建具有多孔结构的超交联聚合物(hyper-crosslinked polymer,HCP)并命名为APfR-HCP,探讨复合材料比表面积的变化及还原4-硝基苯酚(4-NP)的性能。结果表明:该新型复合材料具有较大的比表面积(568m^(2)/g)和丰富的孔道结构;多孔层结构的存在可以快速吸附水体中的小分子有机污染物并富集到金纳米颗粒表面,大大提升复合材料对常见有机污染物4-NP的催化性能;同时还可以有效阻止金纳米颗粒的团聚。APfR-HCP复合多孔材料可以在4min内迅速将4-NP还原为4-氨基苯酚(4-AP),反应速率常数K可达1.10min。APfR-HCP复合多孔材料的催化效率远大于模板APR(K=0.068min-1),并且具有良好的循环利用性,循环使用5次后仍具有良好的催化性能。Using reduced graphene loaded with gold nanoparticles(APR)astwo-dimensional template,hyper-crosslinked polymer(HCP)porous layer with abundant pore structure was successfully constructed on the surface of graphene by solvent knitting method and named APfR-HCP.The change of specific surface area of the composite and its performance for reducing 4-nitrophenol(4-NP)were discussed.The results show that this novel composite material represents a high specific surface area(568 m^(2)/g)and abundant pore structure.The porous layer structure can quickly absorb small molecular organic pollutants in water and concentrate on the surface of gold nanoparticles,which greatly improving the catalytic performance of the composite material for the common organic pollutant 4-NP.Meanwhile,the porous layer can effectively prevent the aggregation of gold nanoparticles.The APfR-HCP composite porous material can rapidly reduce 4-NP to 4-aminophenol(4-AP)within 4 minutes,the reaction rate constant K can be up to 1.10 min^(-1).The catalytic efficiency of APfR-HCP composite porous material is much higher than that of the template APR(K=0.068 min^(-1)).Moreover,the material represents good recyclability,which can still maintain good catalytic performance after 5 cycles.

关 键 词：纳米金催化 石墨烯 多孔结构 复合材料 4-硝基苯酚还原 

分 类 号：O69[理学—化学] TB44[一般工业技术]