摘要
多孔气体扩散电极的制备是甲醛电化学传感器开发的关键所在。通过柠檬酸三钠还原法合成了纳米金-碳纳米管催化剂,制备了甲醛电化学传感器多孔气体扩散电极,并对催化剂和多孔扩散电极进行SEM、EDS、XRD表征。在甲醛气体浓度为0.24 mg/m3和0.63 mg/m3时对组装的传感器进行了响应性能测试。甲醛浓度在0.10～0.84 mg/m3时,传感器的线性方程为:y=10.291x+4.416 1(R2=0.996 0),响应时间大约80 s.
The performance of porous gas diffusive electrode was the key for an excellent electrochemical sensor for determination of formaldehyde.The synthesis catalyst of gold nanoparticles/carbon nanotubes was prepared by sodium citrate reduction method.The gas diffusion porous electrode was prepared and characterized by SEM,EDS and XRD.The formaldehyde gas sensor was assembled and tested when the formaldehyde concentration was 0.24 mg/m3 and 0.63 mg/m3.The linear regress equation was y = 10.291x ＋ 4.416 1（R2 = 0.996 0）when concentration of formaldehyde ranged from 0.1 mg/m3 to 0.84 mg/m3,and the response time was about 80 s.
出处
《仪表技术与传感器》
CSCD
北大核心
2012年第10期11-14,共4页
Instrument Technique and Sensor
基金
国家科技部社会公益课题(KY200301Z)
关键词
纳米金
活性炭
碳纳米管
甲醛
多孔气体扩散电极
gold nanoparticles
activated carbon
carbon nanotubes
formaldehyde
porous gas diffusion electrode
