期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 12, 期 1, 页码 300-307出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2012.5132
关键词
Nano-Porous Hydroxyapatite Modified Electrode; p-Chlorophenol; Electrochemical Determination; Semi-Derivative Technique
类别
资金
- National Natural Science Foundation of China [20975061]
- National Basic Research Program of China [2007CB936602]
- Natural Science Foundation of Shandong Province in China [Y2008B20]
Nano-porous hydroxyapatite (HAp) modified electrode was fabricated by simply electrodepositing HAp onto the glassy carbon electrode (GCE) from the electrolytes solution containing Ca(NO3)(2). 4H(2)O and NH4H2PO4, the resulting electrode (nano-HAp/GCE) was characterized with scanning electron microscopy (SEM). The electrochemical behavior of p-chlorophenol (p-CP) at nano-HAp/GCE was studied by cyclic voltammetry. The electrode displayed selective and enhanced electroanalytical response towards p-CP, obviously because p-CP is accumulated at the electrode. For the greater sensitivity, a semi-derivative technique was adopted to obtain the current signal. The results indicated that the nano-HAp/GCE exhibits substantial enhancement in electrochemical sensitivity for p-CP due to its large surface area and particular adsorbability. After accumulation of 4 min for p-CP on nano-HAp/GCE, the peak height was linearly related to the concentration of p-CP in the range of 1.0 x 10(-8) to 1.0 x 10(-7) mol L-1. The detection limit was 4.0 x 10(-9) mol L-1 at 3 sigma level. Based on this, the modified electrode was successfully applied in water samples with low cost and high sensitivity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据