Open AccessMicrowave assisted polyol process for time-saving synthesis of superparamagnetic nanoparticles and application in artificial mimic enzyme
Author(s) -
Weiping Xiao,
Zhizhong Su,
Yan Zhao,
Chuanyuan Wang
Publication year - 2021
Publication title -
nano express
Language(s) - English
Resource type - Journals
ISSN - 2632-959X
DOI - 10.1088/2632-959x/abf2ce
Subject(s) - superparamagnetism , polyol , nanoparticle , substrate (aquarium) , magnetic nanoparticles , chemical engineering , materials science , nanotechnology , transmission electron microscopy , chemistry , organic chemistry , magnetization , magnetic field , physics , quantum mechanics , engineering , polyurethane , oceanography , geology
A microwave assisted polyol process accomplished within 10 min was developed for synthesis of superparamagnetic Fe 3 O 4 nanoparticles (MNPs) with well controlled size between 2 and 6 nm. Effects of reaction time and temperature on the size of the MNPs were investigated through transmission electronic microscope, x-ray diffraction pattern, thermogravimetic and magnetic analysis. The results indicates that longer reaction time or higher temperature lead to formation of MNPs with larger size. As a proof-of-concept, the MNPs were utilized as peroxidase and their activity was also investigated. Oxidation of typical substrate, 3, 3’, 5, 5’ -tetramethylbenzidine, can be proceeded by using the MNPs as artificial mimic enzyme. The MNPs display the maximal catalyzed activity under the optimum condition as pH = 3.5, 40 °C and concentration of TMB and H 2 O 2 with 120 and 110 mmol·l −1 , respectively. This work provides a new way for fast synthesis of MNPs, which are of potential application in artificial mimic enzyme.