ADSORPTION MECHANISM OF SODIUM OLEATE ON TITANIUM DIOXIDE COATED SENSOR SURFACE USING QUARTZ CRYSTAL MICROBALANCE WITH DISSIPATION

作者：Fan, Guixia^*; Liu, Jiongtian; Cao, Yijun^*; Feng, Li; Xu, Hongxiang

来源：Physicochemical Problems of Mineral Processing, 2016, 52(2): 597-608.

DOI：10.5277/ppmp160207

• QCM-D
• TiO2 coated sensor surface
• sodium oleate
• adsorption mechanism

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.

• 出版日期2016
• 单位中国矿业大学（北京）; 郑州大学