Applications of Graphene oxide / metal modified activated carbon in the capacitive deionization

• Main Authors: Shih-Yu Lal, 賴世裕
• Other Authors: Chao-lang Kao
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/55941607013637159972

碩士 === 國立勤益科技大學 === 化工與材料工程系 === 102 === Capacitive deionization (CDI) is a technology for removal of salts from water by electrosorption of ions onto oppositely charged electrodes. The electrodes are usually made from carbon according to its high surface area and conductivity. In this study, a carbon electrode was fabricated using activated carbon powder and graphene oxide, a combination of carbon electrode and graphene oxide in this work to prepare high conductive carbon materials, its electrical conductivity can enhance in our study, because there are a lot of oxygen functional groups in the graphene oxide, we used oxygen functional group to enhance its porosity by adding titanium dioxide and platinum, which probe into the effect of electrochemical performance. The cyclic voltammetry and galvanostatic charging/discharging profile of the AC+10%GO electrode compared to the carbon electrode in the presence of 1 M NaCl, the values for specific capacitance were 104 F/g and 132.67 F/g, for the same sample, the saturation monolayer adsorption capacity of Langmuir isotherms was 4.6269 mg/g. For the modified by adding titanium dioxide, the cyclic voltammetry and galvanostatic charging/discharging profile of the AC+10%GO+1%Ti electrode compared to the carbon electrode in the presence of 1 M NaCl, the values for specific capacitance were 110 F/g and 137.53 F/g, for the same sample, the saturation monolayer adsorption capacity of Langmuir isotherms was 5.464 mg/g, that increase titanium dioxide helps to enhance capacitance quality and adsorption capacity of carbon materials. For the modified by adding Platinum, the cyclic voltammetry and galvanostatic charging/discharging profile of the AC+10%GO+1%Pt electrode compared to the carbon electrode in the presence of 1 M NaCl, the values for specific capacitance were 119 F/g and 140.91 F/g, for the same sample, the high of saturation monolayer adsorption capacity of Langmuir isotherms was 6.3221 mg/g, that increase platinum helps to enhance capacitance quality and adsorption capacity of carbon materials.