Preparation of palladium nanoparticles and carboxylated MWNTs modified glassy carbon electrode and its application for the electrochemical determination of Cr (VI)

• Main Authors: YANG Shuai, TANG Wanxin, ZHANG Chao, ZHU Ningning
• Format: Article
• Language: English
• Published: Academic Journals Center of Shanghai Normal University 2014-12-01
• Series: Journal of Shanghai Normal University (Natural Sciences)
• Subjects: Cr ( VI); PdNPs; MWNTs; electrochemical; modified electrode
• Online Access: http://qktg.shnu.edu.cn/zrb/shsfqkszrb/ch/reader/create_pdf.aspx?file_no=201406008&flag=1&year_id=2014&quarter_id=6

This study described a simple and rapid method for the electrochemical determination of Cr (VI) based on palladium nanoparticles and carboxylated multi-walled carbon nanotubes (MWNTs) modified glassy carbon electrode (GCE) (written as PdNPs-MWNT/GCE) .The prepared PdNPs-MWNT/GCE was characterized by FE-SEM,CV,EIS and DPV.It was found that many other metal ions such as Cr3+,Pd2+,Zn2+,Pb2+,Cu2+,Al3+,Ba2+,Ca2+,Mg2+ had no influence on Cr (VI) determination.Under the optimal conditions,the reduction current of Cr (VI) increased linearly with increasing the concentration of Cr (VI) in the range of 8×10-7~ 5×10-8mol/L with a correlation coefficient of 0.9960,and the detection limit of 3×10-8mol/L (based on S/N=3).The present method has the following advantages such as simple,rapid,good selectivity and sensitivity.