TAILIEUCHUNG - báo cáo hóa học:" First identification of primary nanoparticles in the aggregation of HMF"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: First identification of primary nanoparticles in the aggregation of HMF | Zhang et al. Nanoscale Research Letters 2012 7 38 http content 7 1 38 o Nanoscale Research Letters a SpringerOpen Journal ORIGINAL PAPER Open Access First identification of primary nanoparticles in the aggregation of HMF Mu Zhang 1 Hong Yang1 Yinong Liu1 Xudong Sun2 Dongke Zhang1 and Dongfeng Xue3 Abstract 5-Hydroxymethylfurfural HMF is an important intermediate compound for fine chemicals. It is often obtained via hydrothermal treatment of biomass-derived carbohydrates such as fructose glucose and sucrose. This study investigates the formation of carbonaceous spheres from HMF created by dehydration of fructose under hydrothermal conditions. The carbonaceous spheres ranging between and 10 gm in diameter have granulated morphologies both on the surface and in the interior. The residual solution is found to contain a massive number of primary nanoparticles. The chemical structure of the carbonaceous spheres was characterised by means of FTIR and NMR spectroscopies. Based on these observations a mechanism involving the formation and aggregation of the nanoparticles is proposed. This mechanism differs considerably from the conventional understanding in the open literature. Keywords saccharides carbohydrate HMF nanoparticles carbonaceous spheres Introduction Hydrothermal treatment of saccharides . fructose glucose sucrose and starch at elevated temperatures has attracted much attention in recent years for its technological and scientific interests 1-6 . In general hydrothermal treatment of saccharides produces water-soluble organic substances and insoluble carbonaceous solids. The soluble organic substances have been the focus of early research and understanding of the chemical reaction process and the products has been well established by earlier researchers 7 8 . In more recent years the solid products often referred to as humins in early studies have attracted keen attention due to their potential for applications as functional .

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