Electrochemical Characterization of Metal Catalyst Free Carbon Nanotube Electrode and Its Application on Heavy Metal Detection
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University of Cincinnati / OhioLINK
2014
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ndltd-OhioLink-oai-etd.ohiolink.edu-ucin14147505962021-08-03T06:27:54Z Electrochemical Characterization of Metal Catalyst Free Carbon Nanotube Electrode and Its Application on Heavy Metal Detection Yue, Wei Analytical Chemistry Heavy metal detection Carbon nanotubes Stripping voltammetry Electrochemistry Heavy metals are claimed to be essential to health. On one hand, heavy metal pollution, such as lead and cadmium is one of the serious pollution problems in nature due to the stability of metals at contaminated sites and high toxicity to the biosphere. While some other heavy metals, such as Mn2+ and Zn2+ are required elements in human body and play important roles.Carbon nanotubes (CNTs) have attracted scientists as a novel electrode material due to their excellent electrochemical features: large potential window, fast electron transfer rate and large surface area. The metal catalyst free carbon nanotubes (MCFCNTs) is synthesized via Carbo Thermal Carbide Conversion method which leads to residual transition metal free in the CNTs structure. The new material shows very good results in detecting heavy metal ions, such as Pb2+, Cd2+, Zn2+ and Mn2+. The work described in this dissertation includes two parts: the first part includes electrochemical characterization of metal catalyst free carbon nanotubes (MCFCNTs) and heavy metal detection with stripping voltammetry; the second part extends the use of metal catalyst free carbon nanotube whiskers as electrode modifier for trace zinc detection in bovine serum matrix with the sample being treated with a double extraction procedure using dithizone in chloroform as a zinc chelating ligand.A composite film of Nafion and MCFCNT whiskers was applied to a gold electrode surface to form a mechanically stable sensor. The sensor was then used for zinc detection in both acetate buffer solution and extracted bovine serum solution. The sensor has reproducible behavior for the anodic stripping voltammetry (ASV) measurement of zinc. A limit of detection of 53 nM was achieved for a 120 s deposition time. 2014 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1414750596 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1414750596 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Analytical Chemistry Heavy metal detection Carbon nanotubes Stripping voltammetry Electrochemistry |
| spellingShingle |
Analytical Chemistry Heavy metal detection Carbon nanotubes Stripping voltammetry Electrochemistry Yue, Wei Electrochemical Characterization of Metal Catalyst Free Carbon Nanotube Electrode and Its Application on Heavy Metal Detection |
| author |
Yue, Wei |
| author_facet |
Yue, Wei |
| author_sort |
Yue, Wei |
| title |
Electrochemical Characterization of Metal Catalyst Free Carbon Nanotube Electrode and Its Application on Heavy Metal Detection |
| title_short |
Electrochemical Characterization of Metal Catalyst Free Carbon Nanotube Electrode and Its Application on Heavy Metal Detection |
| title_full |
Electrochemical Characterization of Metal Catalyst Free Carbon Nanotube Electrode and Its Application on Heavy Metal Detection |
| title_fullStr |
Electrochemical Characterization of Metal Catalyst Free Carbon Nanotube Electrode and Its Application on Heavy Metal Detection |
| title_full_unstemmed |
Electrochemical Characterization of Metal Catalyst Free Carbon Nanotube Electrode and Its Application on Heavy Metal Detection |
| title_sort |
electrochemical characterization of metal catalyst free carbon nanotube electrode and its application on heavy metal detection |
| publisher |
University of Cincinnati / OhioLINK |
| publishDate |
2014 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1414750596 |
| work_keys_str_mv |
AT yuewei electrochemicalcharacterizationofmetalcatalystfreecarbonnanotubeelectrodeanditsapplicationonheavymetaldetection |
| _version_ |
1719437312718274560 |