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Enhanced peroxidase‐like activity of MMT‐supported cuprous oxide nanocomposites toward rapid colorimetric estimation of H 2 O 2
Author(s) -
Lian Siming,
Gao Linna,
Chen Miaomiao,
Liu Zhenxue,
Qiu Jun,
Zhang Xiao,
Luo Xiliang,
Zeng Rongchang,
Liu Qingyun
Publication year - 2019
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.4716
Subject(s) - nanocomposite , chemistry , detection limit , chromogenic , montmorillonite , peroxidase , substrate (aquarium) , nuclear chemistry , catalysis , hydrothermal circulation , polymer chemistry , chemical engineering , organic chemistry , nanotechnology , chromatography , materials science , enzyme , engineering , oceanography , geology
Nanocomposites based on Cu 2 O and Ca‐montmorillonite (Ca + ‐MMT) with different composition were successfully prepared via a simple hydrothermal method. The as‐prepared Cu 2 O‐MMT nanocomposites can rapidly catalytically oxidize the colorless chromogenic substrate, 3,3′,5,5′‐tetramethylbenzydine (TMB) into blue oxTMB with the aid of the H 2 O 2 only in 30 s, which were observed by the naked eye. The reaction catalyzed by the Cu 2 O‐MMT nanocomposites followed the Michaelis–Menten kinetics. Compared to the MMT or Cu 2 O alone, Cu 2 O‐MMT with different mass ratio exhibited an enhanced peroxidase‐like activity. The fabricated H 2 O 2 sensor exhibited a good response to H 2 O 2 with a linear detection range from 3 to 80 μM as well as a detection limit of 2.395 μM. Taking the advantages of the Cu 2 O‐MMT nanocomposites, including outstanding peroxidase‐like activity and high sensitivity for colorimetric detection of H 2 O 2 , a colorimetric sensor based on the Cu 2 O‐MMT nanocomposites was designed and used to rapidly detect H 2 O 2 in a short time.