Open AccessLiquid Exfoliation Process Optimization of Graphene-Like Molybdenum Disulfide with Orthogonal Experiment Method
Author(s) -
Tianyun Zhang,
Haiqing Wang,
Xiaoping Zheng,
Kui Chen
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/768/2/022026
Subject(s) - exfoliation joint , absorbance , molybdenum disulfide , materials science , graphene , molybdenum , ultrasonic sensor , analytical chemistry (journal) , chemical engineering , composite material , nanotechnology , chromatography , chemistry , metallurgy , physics , acoustics , engineering
The values of process parameters have direct effect on the concentration and thickness of graphene-like molybdenum disulfide (MoS 2 ) in dispersions during liquid exfoliation. For the purpose of optimization liquid exfoliation process of MoS 2 and obtaining dispersions with concentration of MoS 2 as high as possible, orthogonal experiment of 3 factors at 4 levels was determined by taking absorbance of absorption peak (located at 620 nm nearby) of graphene-like MoS 2 in UV-Vis spectra as criteria for decision-making of quality. The results were further analyzed with range analysis method. The results indicate that, within given test range, the process parameters affecting absorbance, i.e. concentration of graphene-like MoS 2 , from high to low are 1,4-butanediol (BDO) content in BDO/water mixture, ultrasonic power and ultrasonic time, and the optimal process parameters of liquid exfoliation are BDO content being 80 vol%, ultrasonic power being 600 W and ultrasonic time being 40 h, which is further verified by additional test.