Accepted Manuscript Chemically modified multiwalled carbon nanotube carbon paste electrode for copper determination M. Ghaedi, S. Naderi, M. Montazerozohori, A. asghari PII: DOI: Reference:
S1878-5352(13)00399-7 http://dx.doi.org/10.1016/j.arabjc.2013.11.029 ARABJC 1179
To appear in:
Arabian Journal of Chemistry
Received Date: Accepted Date:
22 October 2012 16 November 2013
Please cite this article as: M. Ghaedi, S. Naderi, M. Montazerozohori, A. asghari, Chemically modified multiwalled carbon nanotube carbon paste electrode for copper determination, Arabian Journal of Chemistry (2013), doi: http:// dx.doi.org/10.1016/j.arabjc.2013.11.029
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Chemically modified multiwalled carbon nanotube carbon paste electrode for copper determination
M. Ghaedia, S. Naderia , M. Montazerozohori, A. asgharib a
Chemistry Department, Yasouj University, Yasouj, 75918-74831, Iran.
b
Chemistry Department, Semnan University, Semnan, Iran.
* Author to whom correspondence should be addressed. Tel. Fax.(+98)-741-2223048, Email:
[email protected] or
[email protected]
ϭ
Abstract: A new Cu2+ carbon paste electrode based on incorporation of new (CPE) via chemically modified multiwalled carbon nanotube (CMMWCNT) on the graphite matrices has been constructed. Surface of MWCNT was modified by performing a couple reactions between trimethoxysilylpropylethilendiamine (TMSPEDA) and 2-hydroxybenzaldehyde (2-HBA). This new material was characterized with different techniques such as FT-IR, SEM and BET analysis. The influence of variables including sodium tetraphenylborate (NaTPB), graphite powder, Nujol, amount of (MWCNT-SPAEIMP) and Ag nano particles loaded on AC on the electrode response was studied and optimized. At optimum values of variables set as carbon powder, carrier, NaTPB and nujol, the response of Cu2+ selective electrodes in the absence and presence of Ag-NP-AC was linear in concentration range of 5.0 × 10−6 - 1.0 × 10−1 and 5.0 × 10−7 - 1.0 × 10−1 mol L−1 with slope 29.93 and 29.11 mV with detection limit of 3.2× 10−6 and 2.5 × 10−7 . The good performance of electrode viz. reasonable wide pH range (2.05.5), fast response time (
