| 林凯,辛嘉英,王艳,杨阳,夏春谷.生物还原制备Au/γ-Al2O3催化葡萄糖氧化动力学研究[J].分子催化,2014,(5):427-435 |
| 生物还原制备Au/γ-Al2O3催化葡萄糖氧化动力学研究 |
| Kinetics of D-glucose oxidation to D-gluconic acid with hydrogen peroxide over bio-reduced Au/γ-Al2O3 catalysts |
| 投稿时间：2014-07-21 修订日期：2014-08-20 |
| DOI： |
| 中文关键词: 生物还原 Au/γ-Al2O3催化剂 葡萄糖氧化 动力学 |
| 英文关键词:Bioreduction Au/γ-Al2O3 catalysts D-Glucose oxidation Kinetic study |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目）；黑龙江省研究生培养创新计划资助项目 |
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| 中文摘要: |
| 本文主要讨论了生物还原制备Au/γ-Al2O3催化剂用于催化葡萄糖氧化动力学的研究。利用甲烷氧化菌素（Methanobactin，Mb）作为还原剂及稳定剂制备了1wt%Au/γ-Al2O3催化剂。通过TEM分析，负载纳米金颗粒（Gold nanoparticles，AuNPs）粒径为3.48±0.881 nm。比较Mb及Au/γ-Al2O3催化剂的FTIR发现，在Au/γ-Al2O3催化剂表面整合有Mb基团。实验建立了幂指数速率模型，确定了D-葡萄糖、H2O2、催化剂、葡萄糖酸钠的反应级数，分别为：0.4696、0.3729、0.4088和-0.9794。同时通过阿伦尼乌斯曲线求得该催化剂活化能（Activation energy, Ea）为6.114 kJ/mol。最后通过验证该速率模型发现，预测值与实验值具有良好的拟合性。 |
| 英文摘要: |
| In this paper, the kinetics of oxidation of D-glucose with H2O2 over heterogeneous bio-reduced Au/γ-Al2O3 catalysts had been mainly discussed. A catalyst with 1wt% Au support on alumina was prepared by using Mb which played dual roles as both reductant and stabilizer. The average Gold nanoparticles (AuNPs) size was calculated to be around 3.48±0.881 nm by TEM images. In addition, comparing the FTIR spectrum of Mb and Au/γ-Al2O3 catalysts indicated the involvement of biomass groups in the synthesis. By fitting the kinetic data using power-rate law model after eliminating mass transfer resistances, the orders of the reaction of D-glucose, H2O2, catalyst and sodium gluconate were found to be 0.4696, 0.3729, 0.4088 and-0.9794, respectively. The activation energy (Ea) was calculated to be 6.1141kJ/mol from an Arrhenius plot. Based on the kinetic rate equation, the model predictions were in good agreement with the experimental data. |
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