Adsorption mechanism of sodium oleate on titanium dioxide coated sensor surface using quartz crystal microbalance with dissipation
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School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China
National Engineering Research Center of Coal Preparation and Purification, Xuzhou 221116, Jiangsu, China
School of Chemical and Environmental Engineering, University of Mining and Technology (Beijing), Beijing, China
Publication date: 2016-06-01
Corresponding author
Yi-jun Cao   

National Engineering Research Center of Coal Preparation and Purification, No1,Daxue Road,Xuzhou,Jiangsu,221116,P.R.China, 221116 Xuzhou, China
Physicochem. Probl. Miner. Process. 2016;52(2):597-608
Quartz Crystal Microbalance with Dissipation (QCM-D) was firstly applied to investigate the adsorption mechanism of sodium oleate on TiO2 coated sensor surface. The effects of pH value, sodium oleate concentration, and temperature on TiO2 coated sensor surface were evaluated systematically using the QCM-D technique. Zeta potential, surface tension, adsorption isotherms, and adsorption thermodynamics were employed to characterize the adsorption process. The results showed the advantages of QCM-D on the investigation of the adsorption process. Additionally, the electrostatic equilibrium adsorption data was well matched to the Langmuir isotherm. Based on the thermodynamic analysis, adsorption was a spontaneous and endothermic physisorption process.
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