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Synthesis of NiCo2O4 Nanostructures and Their Electrochemial Properties for Glucose Detection.

ABSTRACT: In this work, we prepared spinel-type NiCo₂O₄ (NCO) nanopowders as a low-cost and sensitive electrochemical sensor for nonenzymatic glucose detection. A facile and simple chemical bath method to synthesize the NCO nanopowders is demonstrated. The effect of pH and annealing temperature on the formation mechanism of NCO nanoparticles was systematically investigated. Our studies show that different pHs of the precursor solution during synthesis result in different intermediate phases and relating chemical reactions for the formation of NCO nanoparticles. Different morphologies of the NCO depending on pHs are also discussed based on the mechanism of growth. Electrochemical performance of the prepared NCO was characterized towards glucose, which reveals that sensitivity and selectivity of the NCO are significantly related with the final microstructure combined with constituent species with multiple oxidation states in the spinel structure.

SUBMITTER: Jang KB

PROVIDER: S-EPMC7824400 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

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Synthesis of NiCo2O4 Nanostructures and Their Electrochemial Properties for Glucose Detection.

Jang Kyu-Bong KB Park Kyoung Ryeol KR Kim Kang Min KM Hyun Soong-Keun SK Jeon Jae-Eun JE Song Young Sik YS Park Soo-Keun SK Moon Kyoung-Il KI Ahn Chisung C Lim Sung-Chul SC Lee Jaewoong J Kim Jong Cheol JC Han HyukSu H Mhin Sungwook S

Nanomaterials (Basel, Switzerland) 20201228 1

In this work, we prepared spinel-type NiCo<sub>2</sub>O<sub>4</sub> (NCO) nanopowders as a low-cost and sensitive electrochemical sensor for nonenzymatic glucose detection. A facile and simple chemical bath method to synthesize the NCO nanopowders is demonstrated. The effect of pH and annealing temperature on the formation mechanism of NCO nanoparticles was systematically investigated. Our studies show that different pHs of the precursor solution during synthesis result in different intermediate ...[more]

PMID: 33379350

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Project description:BACKGROUND: As a potent antimicrobial agent, silver nanostructures have been used in nanosensors and nanomaterial-based assays for the detection of food relevant analytes such as organic molecules, aroma, chemical contaminants, gases and food borne pathogens. In addition silver based nanocomposites act as an antimicrobial for food packaging materials. In this prospective, the food grade melanin pigment extracted from sponge associated actinobacterium Nocardiopsis alba MSA10 and melanin mediated synthesis of silver nanostructures were studied. Based on the present findings, antimicrobial nanostructures can be developed against food pathogens for food industrial applications. RESULTS: Briefly, the sponge associated actinobacterium N. alba MSA10 was screened and fermentation conditions were optimized for the production of melanin pigment. The Plackett-Burman design followed by a Box-Behnken design was developed to optimize the concentration of most significant factors for improved melanin yield. The antioxidant potential, reductive capabilities and physiochemical properties of Nocardiopsis melanin was characterized. The optimum production of melanin was attained with pH 7.5, temperature 35°C, salinity 2.5%, sucrose 25 g/L and tyrosine 12.5 g/L under submerged fermentation conditions. A highest melanin production of 3.4 mg/ml was reached with the optimization using Box-Behnken design. The purified melanin showed rapid reduction and stabilization of silver nanostructures. The melanin mediated process produced uniform and stable silver nanostructures with broad spectrum antimicrobial activity against food pathogens. CONCLUSIONS: The melanin pigment produced by N. alba MSA10 can be used for environmentally benign synthesis of silver nanostructures and can be useful for food packaging materials. The characteristics of broad spectrum of activity against food pathogens of silver nanostructures gives an insight for their potential applicability in incorporation of food packaging materials and antimicrobials for stored fruits and foods.

Dataset Information

Synthesis of NiCo2O4 Nanostructures and Their Electrochemial Properties for Glucose Detection.

Publications

Synthesis of NiCo2O4 Nanostructures and Their Electrochemial Properties for Glucose Detection.

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