Hydrothermal Dehydration of Aqueous Fructose Solutions in a Closed System

作者：Chunhua Jennifer Yao, Yongsoon Shin, Li‐Qiong Wang, Charles F. Windisch, William D. Samuels, Bruce W. Arey, Chongmin Wang, WILLIAM M. JUN. RISEN, Gregory J. Exarhos · 发表于：The Journal of Physical Chemistry C · 年份：2007 · DOI：10.1021/jp074188l · 被引用次数：303 · 研究领域：Mesoporous Materials and Catalysis、Pickering emulsions and particle stabilization、Covalent Organic Framework Applications

Aqueous monosaccharide solutions including glucose or fructose have been hydrothermally treated in a closed system to form colloidal carbon spheres. In-situ Raman and 13 C NMR have been used to quantify the intramolecular dehydration moiety, HMF, as an intermediate. An aqueous glucose solution forms a carbon sphere via an intermolecular dehydration route without forming HMF during initial hydrothermal treatment and followed by carbonization at 170−180 °C. However, an aqueous fructose solution initially forms HMF by intramolecular dehydration at 120−140 °C. Upon subsequent polymerization, microscopic carbon-containing spheres assemble to larger spheres, thereby generating a grain-like surface morphology. The carbon sphere contains a dense hydrophobic carbon core and a hydrophilic shell.