Hydrothermal Dehydration of Aqueous Fructose Solutions in a Closed System
Hydrothermal Dehydration of Aqueous Fructose Solutions in a Closed System
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DOI：
10.1021/jp074188l
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发表时间：
2007-10
影响因子：
3.7
通讯作者：
Chunhua Yao;Y. Shin;Li-Qiong Wang;C. Windisch;W. D. Samuels;B. Arey;Chongmin Wang;W. Risen
中科院分区：
文献类型：
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作者：
Chunhua Yao;Y. Shin;Li-Qiong Wang;C. Windisch;W. D. Samuels;B. Arey;Chongmin Wang;W. Risen
包括葡萄糖或果糖的单糖水溶液已经在封闭系统中进行水热处理以形成胶体碳球。原位拉曼和13 C NMR已被用来量化的分子内脱水部分，HMF，作为中间体。葡萄糖水溶液通过分子间脱水途径形成碳球，在初始水热处理期间不形成HMF，然后在170 - 180 °C下碳化。然而，果糖水溶液最初在120 - 140 °C通过分子内脱水形成HMF。在随后的聚合反应中，微观的含碳球体组装成更大的球体，从而产生颗粒状的表面形态。该碳球包含一个致密的疏水碳核和一个亲水壳。
Aqueous monosaccharide solutions including glucose or fructose have been hydrothermally treated in a closed system to form colloidal carbon spheres. In-situ Raman and 13C 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.