SNanostructured Diatom-ZrO2 composite as a selective and highly sensitive enzyme free electrochemical sensor for detection of methyl parathion

被引：42

作者：

Gannavarapu, Krishna Prasad ^{[1
]}

Ganesh, V ^{[2
]}

Thakkar, Megha ^{[3
]}

Mitra, Somenath ^{[3
]}

Dandamudi, Rajesh Babu ^{[1
]}

机构：

[1] Sri Sathya Sai Inst Higher Learning, Dept Chem, Prasanthinilayam Campus, Puttaparthi, Andhra Pradesh, India

[2] CSIR, Electrod & Electrocatalysis Div, Cent Electrochem Res Inst, Karaikkudi, Tamil Nadu, India

[3] New Jersey Inst Technol, Dept Chem & Environm Sci, 151 Tiernan Hall, Newark, NJ 07102 USA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2019年 / 288卷

关键词：

Nanoporous diatom-ZrO2; Differential pulse voltammetry; Methyl parathion; Electrochemical sensor; GLASSY-CARBON ELECTRODE; LIQUID-CHROMATOGRAPHY; ORGANOPHOSPHORUS PESTICIDES; MASS-SPECTROMETRY; WATER; NANOPARTICLES; BIOSENSORS; GROWTH; NANOSTRUCTURES; NANOTUBES;

D O I：

10.1016/j.snb.2019.03.036

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In the current work we report a simple and scalable technique for synthesis of ordered nanoporous Si-ZrO2 composite derived from the diatom Phaeodactylum tricornutum. The composite was well characterized using SEM, TEM-EDX, FTIR, TGA, BET and DLS. The diatom-ZrO2 was found to have a specific surface area of 140 m(2)/g, Si:Zr ratio of 1:4 and a particle size of 80 +/- 2 nm. This composite was evaluated as an enzyme free electrochemical sensor towards the detection of methyl parathion (MP) and showed excellent sensing ability at extremely low detection limits of 54.3 pM and a linear concentration range of 3.4 nM to 64 mu M. The diatom-ZrO2 composite was also found to be highly selective towards MP as shown by its response even in the presence of high concentrations of other interfering molecules and ions.

引用

页码：611 / 617

页数：7

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