The preparation and phenols oxidative activity of chitosan／HAP／copper catalysts

• Main Authors: Lai Kuan-Yu, 賴冠宇
• Other Authors: Chao En-Chung
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/42581941928945976957

碩士 === 國立聯合大學 === 化學工程學系碩士班 === 99 === In this study the CS／GPTMS／HAP porous hybrid membranes (CGH) were prepared , in which 3-Glycidoxypropyl–trimethoxysilane (GPTMS) was used as crosslinking agent and sodium chloride was used as porogen. CGH was used as the supported matrix to immobilize Cu2+. The adsorption of Cu2+ with CGH and the catechol oxidizing activity of the CGH／Cu catalysts were investigated. The pore size and porosity of CGH were decreased with the increasing dosage of HAP , however , there was an increase in the acid resistance , the thermo resistance and the tensile strength. The Pseudo second-order kinetic model can well describe the Cu2+ adsorption behavior of CGH. With the increasing of Cu2+ concentration , the CGH equilibrium adsorption capacity can be increased to 1.4136 mmol/g. The catechol oxidative rate of CGH／Cu was increased with the increasing of catechol or hydrogen peroxide concentration. It was shown as a first-order reaction rate for catechol and for hydrogen peroxide , respectively. The CGH／Cu catalysts can be effectively used to oxidize catechol to quinone at the presence of hydrogen peroxide. The forming quinone can been removed by the adsorbent with amino group. The CGH／Cu catalysts can be applied for the removal of catechol in water.