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Screening of several oxides used as efficient electrocatalysists for detection of 2,4‐dimethyl phenol in aqueous medium
Author(s) -
Nhung Vu Thi Hong,
Manh Nguyen Ba,
Thu Vu Thi,
Yen Pham Thi Hai,
Giang Le Ha,
Phong Pham Hong,
Tuan Vu Anh,
Ha Vu Thi Thu
Publication year - 2020
Publication title -
vietnam journal of chemistry
Language(s) - English
Resource type - Journals
eISSN - 2572-8288
pISSN - 0866-7144
DOI - 10.1002/vjch.202000019
Subject(s) - phenol , aqueous medium , aqueous solution , chemistry , materials science , chromatography , organic chemistry
A paste electrochemical sensor, based on a carbon paste electrode modified with different oxides, has been developed for investigation of 2,4‐dimethylphenol (2,4 DMP) oxidation in phosphate buffer solution (PBS) with pH of 7. In this study, Fe 2 O 3 , Al 2 O 3 , ZrO 2 and SiO 2 have been tested. Among these oxides, Al 2 O 3 showed the best electrocatalysis on oxidation of 2,4 DMP at ratio of graphite powder/Al 2 O 3 /paraffin oil = 71/4/25. The high sensibility of Al 2 O 3 for 2,4 DMP detection can be explained by the interaction between benzene rings of phenol and acid sites of Al 2 O 3 . From this result it opens a high potential application of sensors based on the electro acidic catalysts.
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