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Synthesis of Pb(OH)2/rGO Catalyst for Conversion of Sugar to Lactic Acid in Water
Guan-hua Hou,Li-feng Yan*
Author NameAffiliationE-mail
Guan-hua Hou Department of Chemical Physics, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), University of Science and Technology of China, Hefei 230026, China  
Li-feng Yan* Department of Chemical Physics, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), University of Science and Technology of China, Hefei 230026, China lfyan@ustc.edu.cn 
Abstract:
Conversion of sugars from biomass to platform chemicals or fuels is an attracting topic for the utilization of biomass. Pb2+ ion is an efficient catalyst for the degradation of sugar to lactic acid, and it will be better to fix lead on a solid catalyst to reduce the risk of exposure of Pb2+ to environment. Here, a simple method has been developed to prepare a composite catalyst of Pb(OH)2/rGO, where the nanoparticles of Pb(OH)2 in size of 2-5 nm were prepared and fixed over the as-prepared reduced graphene oxide (rGO) nanosheets. The as-obtained catalyst showed an efficient catalytic activity to degrade glucose, fructose, and cellulose in aqueous solution, and the major product is lactic acid. The yield of lactic acid reached 58.7% when fructose was used as the feedstock (433 K and 2.5 MPa N2), and the catalyst can be recycled with high activity. Cellulose can also be directly converted into lactic acid in aqueous solution over the catalyst without extra acid or alkali, and the maximum yield of lactic acid is 31.7%.
Key words:  Graphene, Lead hydroxide, Nanoparticles, Composite, Catalyst, Lactic acid
FundProject:
合成Pb(OH)2/rGO催化剂用于催化转化糖为乳酸
蒋振亚,闫立峰*
摘要:
Pb2+离子可以作为高效的催化剂用于降解糖为乳酸, 但是为了降低暴露Pb2+离子于环境中的风险,最好的办法是把铅固定在一个固体催化剂上.报道了一个简单的制备Pb(PbO2)/石墨烯复合固体催化剂的方法,可以得到石墨烯负载的纳米铅催化剂,铅颗粒的尺寸在2~5 nm.获得的催化剂可以在水中用于降解葡萄糖、果糖甚至纤维素,产物主要为乳酸.对于果糖、乳酸的产率为58.7% (433 K,2.5 MPa N2);当直接使用纤维素为原料,无额外酸、碱催化剂时,乳酸的产率可以达到31.7%.
关键词:  氢氧化铅,纳米粒子,复合物,催化剂,乳酸
DOI:10.1063/1674-0068/28/cjcp1502026
分类号: