TY - JOUR
T1 - Nanostructured Diatom-ZrO2 composite as a selective and highly sensitive enzyme free electrochemical sensor for detection of methyl parathion
AU - Gannavarapu, Krishna Prasad
AU - Ganesh, V.
AU - Thakkar, Megha
AU - Mitra, Somenath
AU - Dandamudi, Rajesh Babu
N1 - Funding Information:
The work is dedicated to Bhagawan Sri Sathya Sai Baba, Founder Chancellor of Sri Sathya Sai Institute of Higher Learning. Authors acknowledge Sri Sathya Sai Institute of Higher Learning- Central Research Instrument Facility (SSSIHL-CRIF) for providing the characterization facilities. Authors acknowledge the support of the central library, SSSIHL, for providing access to Scopus. The authors also thank Dr. Raju Thota for his due help in the preparation of the manuscript and useful discussion. The work at NJIT was partially supported from a grant from NIEHS (grant number R01ES023209 ).
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/6/1
Y1 - 2019/6/1
N2 - 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 m2/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 μM. 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.
AB - 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 m2/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 μM. 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.
KW - Differential pulse voltammetry
KW - Electrochemical sensor
KW - Methyl parathion
KW - Nanoporous diatom-ZrO
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U2 - 10.1016/j.snb.2019.03.036
DO - 10.1016/j.snb.2019.03.036
M3 - Article
AN - SCOPUS:85062808655
SN - 0925-4005
VL - 288
SP - 611
EP - 617
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
ER -