A novenovel electrochemical sensor for formaldehyde based on Platinum nanoparticle / L-alanine modified glassy carbon electrode

摘要：

　　In this paper a novel and sensitive electrochemical sensor for the detection of formaldehyde is developed based on the platinum nanoparticles and L-alanine modified glassy carbon electrode.The sensor is fabricated by two steps.Platinum nanoparticles are initially immobilized on the electrode via electrodeposition method firstly,then the L-alanine is modified on the electrode by self-assembly method.The structure and morphologies of the Platinum nanoparticles were characterized by SEM and TEM.The electrocatalytic activity of the PtNP-L-alanine/GC electrode for formaldehyde detection in alkaline media is investigated via a series of electrochemical measurement.The PtNP-L-alanine/GC electrode in this study showes very high electrochemical activity toward formaldehyde.The oxidation peak current has a linear relationship with the formaldehyde concentration in the 0.3 μmol dm-3 to 4.0 mmol dm-3 range (R=0.9998),while the detection limit is estimated to be 34 nmol dm-3 (S/N=3).Such high sensitivity is attributed to the large surface area of the highly dispersed nanoparticles for electrocatalytic reaction and the fast electron transfer in the composite electrode.It demonstrates that glassy carbon electrode modified by platinum nanoparticles and L-alanine is suitable for the determination of formaldehyde.

关键词： Platinum nanoparticles L-alanine Formaldehyde Sensor Determination

作者: Jiahong He Yansong Kuang Zhongrong Song Zhigang Xie

作者单位: Department of materials and chemical engineering, Chongqing university of arts and science,402160, China

会议类型: 国际会议

会议名称: 中国微米纳米技术学会第14届学术年会、第3届国际年会暨第6届微米纳米技术“创新与产业化国际研讨与展览会(CSMNT2012 & ICMAN2012)

会议地点: 杭州

会议语种:英文

页码: 1-5

在线出版日期: 2012-11-04（万方平台首次上网日期，不代表论文的发表时间）