Carbon nanotube-modified glassy carbon electrode for anodic stripping voltammetric detection of Uranyle

被引：26

作者：

Golikand, Ahmad Nozad ^{[1
]}

Asgari, Mehdi ^{[1
]}

Maragheh, Mohammad Ghannadi ^{[1
]}

Lohrasbi, Elaheh ^{[1
]}

机构：

[1] NSTRI, Dept Chem, Jaber Ibne Hayan Res Labs, Tehran, Iran

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2009年 / 39卷 / 01期

关键词：

Anodic stripping voltammetry; Uranyle; Carbon nanotube; Modified electrode; Composite film electrode; CYCLIC VOLTAMMETRY; URANIUM;

D O I：

10.1007/s10800-008-9647-7

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A multi-wall carbon nanotube (MWNT) modified glassy carbon electrode (GCE) is described for the measurement of trace levels of uranium by anodic stripping voltammetry. In a pH 4.4 NaAc-Hac buffer containing 0.010 mol L-1 Mg(NO3)(2), UO22+ was adsorbed onto the surface of a MWNT film coated glassy carbon electrode and then reduced at -0.40 V vs. Ag/AgCl. During the positive potential sweep the reduced uranium was oxidized and a well-defined stripping peak appeared at + 0.20 V vs. Ag/AgCl. Low concentrations of Mg2+ significantly enhanced the stripping peak currents since they induced UO22+ to adsorb at the electrode surface. The response was linear up to 1.2 X 9 10(-7) mol L-1 and the relative standard deviation at 2.0 x 9 10(-8) mol L-1 uranium was 5.2%. Potential interferences were examined. The attractive behavior of the new "mercury-free'' uranium sensor holds promise for on-site environmental and industrial monitoring of uranium.

引用

页码：65 / 70

页数：6

共 17 条

[1] Carbon nanotubes - the route toward applications [J].

Baughman, RH ;

Zakhidov, AA ;

de Heer, WA .

SCIENCE, 2002, 297 (5582) :787-792

[2] CYCLIC VOLTAMMETRY OF THE URANYL-ION IN MAGNESIUM-CHLORIDE ELECTROLYTE AT A GRAPHITE ELECTRODE IN WEAKLY ACIDIC AND NEUTRAL SOLUTIONS [J].

DUEBER, RE ;

BOND, AM ;

DICKENS, PG .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1994, 141 (02) :311-316

[3] DETERMINATION OF TUNGSTEN AND MOLYBDENUM AT LOW-LEVELS IN GEOLOGICAL-MATERIALS BY INDUCTIVELY COUPLED PLASMA MASS-SPECTROMETRY [J].

HALL, GEM ;

PARK, CJ ;

PELCHAT, JC .

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 1987, 2 (02) :189-196

[4] THE POLAROGRAPHY OF URANIUM .2. POLAROGRAPHY IN STRONGLY ACID SOLUTION [J].

KOLTHOFF, IM ;

HARRIS, WE .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1946, 68 (07) :1175-1179

[5] Adsorptive stripping voltammetric measurements of trace uranium at the bismuth film electrode [J].

Lin, L ;

Thongngamdee, S ;

Wang, J ;

Lin, YH ;

Sadik, OA ;

Ly, SY .

ANALYTICA CHIMICA ACTA, 2005, 535 (1-2) :9-13

[6] Low-potential stable NADH detection at carbon-nanotube-modified glassy carbon electrodes [J].

Musameh, M ;

Wang, J ;

Merkoci, A ;

Lin, YH .

ELECTROCHEMISTRY COMMUNICATIONS, 2002, 4 (10) :743-746

[7] THEORY AND APPLICATION OF CYCLIC VOLTAMMETRY FOR MEASUREMENT OF ELECTRODE REACTION KINETICS [J].

NICHOLSON, RS .

ANALYTICAL CHEMISTRY, 1965, 37 (11) :1351-+

[8]

PINTA M, 1992, ANALUSIS, V20, pM14

[9]

Rao CNR, 2001, CHEMPHYSCHEM, V2, P78, DOI 10.1002/1439-7641(20010216)2:2<78::AID-CPHC78>3.0.CO

[10]

2-7

← 1 2 →