纳米TiO_(2)溶胶催化葡萄糖合成5-羟甲基糠醛  

The Catalytic Formation of 5-Hydroxymethyl Furfuraldehyde from Glucose with Nano-TiO_(2) Gel

作　　者：陈烨婷 左雄军 顾凤龙[1] CHEN Yeting;ZUO Xiongjun;GU Fenglong(MOE Key Laboratory of Theoretical Chemistry of Environment∥School of Chemistry, South China Normal University, Guangzhou 510006,China;Analysis and Testing Centre, South China Normal University, Guangzhou 510006,China)

机构地区：[1]教育部环境理论化学重点实验室/华南师范大学化学学院,广州510006 [2]华南师范大学分析测试中心,广州510006

出　　处：《华南师范大学学报（自然科学版）》2021年第3期29-34,共6页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(21673085);粤港科技合作资助计划项目(2017A050506048)。

摘　　要：采用溶胶凝胶法合成了纳米TiO_(2)溶胶和PEG-TiO_(2)溶胶,将其作为葡萄糖转化为5-羟甲基糠醛(HMF)的催化剂,对比研究了纳米TiO_(2)粉体和TiO_(2)溶胶的催化性能.结果表明:以纳米TiO_(2)溶胶为催化剂,葡萄糖转化为HMF的转化率为93.7%,HMF的收率为21.7%;以纳米TiO_(2)为催化剂,葡萄糖的转化率接近100%,而HMF的收率仅为1.4%.采用聚乙二醇(PEG 200)和钛酸乙酯为原料,制备了具有更高TiO_(2)固含量的PEG-TiO_(2)溶胶,方便运输、储存和使用.在最佳条件下,以PEG-TiO_(2)溶胶和甲酸为催化剂,以水为反应溶剂,葡萄糖的转化率达到92.0%,HMF的收率达到56.2%,反应温度为100℃,反应时间为12 h.研究结果为工业上大规模绿色高效催化葡萄糖转化为HMF提供了一种新的方法.Nano TiO_(2) gel and PEG-TiO_(2) gel were synthesized with the sol-gel method and were used as catalysts for glucose conversion into 5-hydroxymethyl furfuraldehyde(HMF).The catalytic properties of nano TiO_(2) gel and TiO_(2) powder were compared.The results show that with nano TiO_(2) gel as catalyst,the conversion rate of glucose into HMF was 93.7%,and the yield of HMF was 21.7%and with nano TiO_(2) as catalyst,the glucose conversion rate was close to 100%,while the yield of HMF was only 1.4%.PEG-TiO_(2) with higher gelid content of TiO_(2) was prepared using polyethylene glycol(PEG 200)and ethyl titanate as raw materials,which was convenient for transportation,storage and use.Under the optimal conditions,with PEG-TiO_(2) gel and formic acid as catalyst and water as reaction liquid,the glucose conversion rate reached 92.0%,the yield of HMF reached 56.2%,the reaction temperature was 100℃,and the reaction time was 12 h.The results provide a new method for large-scale green and efficient catalytic conversion of glucose into HMF in industry.

关 键 词：纳米TiO_(2) 葡萄糖转化 5-羟甲基糠醛(HMF) PEG-TiO_(2)溶胶 

分 类 号：O643[理学—物理化学]