CAJ | 학술논문

具有纳米孔洞的金属-有机骨架材料 Cu3(BTC)2(H2O)3为催化剂,过氧化氢为氧化剂,利用紫外可见光谱研究其催化氧化苯甲醇生成苯甲醛的催化反应动力学行为,系统地讨论了纳米孔洞金属-有机骨架材料的催化动力学.研究结果表明,随着反应介质的 pH、催化剂与反应底物的摩尔比和反应温度的升高,准一级反应速率常数 kobsd 也会随之增大.根据所得实验结果,讨论了催化氧化反应动力学机理,建立了催化反应动力学模型.基于所建立的动力学模型和准一级反应速率常数 kobsd,计算了催化反应的活化能 Ea,催化剂与底物间的吸脱附平衡常数 KS 以及该反应在催化剂催化内表面生成产物的表观一级速率常数 kN.
구유납미공동적금속-유궤골가재료 Cu3(BTC)2(H2O)3위최화제,과양화경위양화제,이용자외가견광보연구기최화양화분갑순생성분갑철적최화반응동역학행위,계통지토론료납미공동금속-유궤골가재료적최화동역학.연구결과표명,수착반응개질적 pH、최화제여반응저물적마이비화반응온도적승고,준일급반응속솔상수 kobsd 야회수지증대.근거소득실험결과,토론료최화양화반응동역학궤리,건립료최화반응동역학모형.기우소건립적동역학모형화준일급반응속솔상수 kobsd,계산료최화반응적활화능 Ea,최화제여저물간적흡탈부평형상수 KS 이급해반응재최화제최화내표면생성산물적표관일급속솔상수 kN.
Kinetics of oxidation of benzyl alcohol catalyzed by nanoporous metal-organic frameworks Cu3(BTC)2(H2O)3was studied using UV-vis spectral method. It was found that the apparent first-order rate constant increased remarkably with the increasing of pH, molar ratio of the catalyst to the substrate and reaction temperature. Based on the experimental results, catalysis mechanism for the catalytic oxidation was discussed, and a kinetic model was proposed. The apparent activation energy (Ea), association equilibrium constant between the catalyst and the substrate (KS), and apparent first-order rate constants of the catalytic reaction taking place on the surface of channels in the framework (kN) for each reaction have been calculated.