PW_(11)Fe/CS/CNTs/C复合膜电极的制备及在H_2O_2电化学传感器中的应用  

Preparation of PW_(11)Fe/CS/CNTs/C composite film electrode and application in H_2O_2 electrochemical sensor

作　　者：王鑫[1] 章金明 蒋晓薇[1] 韩雷云 王莉莉 黄燕霞 游诚航[1] 华英杰[1] 王崇太[1] WANG Xin ZHANG Jinming JIANG Xiaowei HAN Leiyun WANG Lili HUANG Yanxia YOU Chenghang HUA Yingfie WANG Chongtai(School of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China)

机构地区：[1]海南师范大学化学与化工学院,海南海口571158

出　　处：《中山大学学报（自然科学版）》2017年第5期79-84,共6页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金(21606061);海南省国际科技合作项目(KJHZ2014-08);海南省自然科学基金项目(20162022);海口市重点科技项目(2016-032);海南省科协青年科技英才创新计划项目(201502);全国大学生创新创业训练项目(201511658004)

摘　　要：以壳聚糖(CS)为吸附剂和成膜剂,Keggin型铁取代杂多阴离子PW_(11)O_(39)Fe(Ⅲ)(H_2O)^(4-)(PW_(11)Fe)为电催化剂,碳纳米管(CNTs)为导电助剂,集成吸附法和溶胶-凝胶法将PW_(11)Fe固载在石墨电极表面制备了PW_(11)Fe/CS/CNTs/C复合膜电极,并用电化学方法研究了该电极的电化学行为及其影响因素,同时研究了电极对H_2O_2还原的电催化活性及作为H_2O_2电化学传感器的可能性。实验结果表明,PW_(11)Fe/CS/CNTs/C复合膜电极具有PW_(11)Fe类似的电化学行为及对H_2O_2还原的电催化活性,用于H_2O_2的安培检测,电流响应灵敏度为0.30 mA·cm^(-2)·(μmol/L)^(-1),检出限为7.3μmol/L(S/N=3)。A composite film electrode PW_（11）Fe/CS/CNTs/C was prepared by the integration of adsorption method and sol-gel method using chitosan as both an adsorbent and film-forming agent,Keggin type Fe（Ⅲ）-substituted heteropolyanion PW_（11）O_（39）Fe（Ⅲ）（H_2O）^（4-）（PW_（11）Fe） as an electrocatalyst,carbon nano tubes（CNTs） as a conductivity improver in this paper.The electrochemical behavior and its influence factors of the as-prepared electrode were investigated by using the electrochemical method.The electrocatalytic activity towards H_2O_2 reduction and the possibility also used to be an electrochemical sensor detecting H_2O_2 were evaluated.The results showed that the PW_（11）Fe/CS/CNTs/C composite film electrode possessed a similar electrochemical behavior with PW_（11） Fe and a high electrocatalytic activity towards H_2O_2 reduction.For detecting H_2O_2 reduction.Applied to detect H_2O_2,the electrode exhibits a high sensitivity of 0.30 mA·cm^（-2）·（μmol/L）^（-1） and a detection limit of 7.3 μmol/L（S/N=3）.

关 键 词：Keggin型铁取代杂多阴离子 循环伏安 壳聚糖 电催化 碳纳米管 

分 类 号：O646[理学—物理化学]