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Manganese Oxide Nanochips as a Novel Electrocatalyst for Direct Redox Sensing of Hexavalent Chromium

Title
Manganese Oxide Nanochips as a Novel Electrocatalyst for Direct Redox Sensing of Hexavalent Chromium
Author
김기현
Keywords
ENDOCRINE-DISRUPTING CHEMICALS; ELECTROCHEMICAL DETERMINATION; NANOPARTICLES; CARCINOGENICITY; FABRICATION; HYDRAZINE; REMOVAL; CANCER; SENSOR
Issue Date
2019-05
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v. 9, no. 8050
Abstract
In order to maintain a healthy organisation of bionetworks, both qualitative and quantitative estimation of hexavalent chromium in food and beverage samples is required based on proper quality control and assurance. Nonetheless, conventional quantitation techniques for hexavalent chromium generally suffer from certain limitations (e.g., the need for expertise, costly equipment, and a complicated procedure). This research was performed to elaborate a novel method to quantify hexavalent chromium based on an electrochemical cyclic voltammetry technique. To this end, nanochips of manganese oxide (Mn3O4: approximately 80-90 nm diameter and 10 nm thickness) were synthesized using a chemical method and characterized with spectroscopic and microscopic approaches. These nanochips were employed as proficient electrocatalytic materials in direct redox sensing of hexavalent chromium in both real samples and laboratory samples. Manganese oxide nanochips felicitated large surface area and catalytic action for direct electrochemical reduction of hexavalent chromium at electrode surface. This fabricated nanochip sensor presented a detection limit of 9.5 ppb with a linear range of 50-400 ppb (sensitivity of 25.88 mu A cm(-2) ppb(-1)).
URI
https://www.nature.com/articles/s41598-019-44525-4http://repository.hanyang.ac.kr/handle/20.500.11754/111128
ISSN
2045-2322
DOI
10.1038/s41598-019-44525-4
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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