石墨烯固体酸催化转化葡萄糖为化学品

利用氢化钠和丙磺酸内酯合成出了磺化石墨烯催化剂，采用XPS、FT-IR、TEM等方法对其进行了表征，并且对此催化剂催化葡萄糖的转化反应进行了研究．探究此催化剂在纯水中、没有添加任何有机溶剂下催化转化葡萄糖制备高附加值化学品方面的催化活性，在最优的反应条件下， 5-羟甲基糠醛(HMF)最高产率可达28.8%，产物甲酸、乳酸和HMF的总产率可达51.94%．经过5次催化反应，催化剂仍表现出相对高的催化活性，三种产物的产率依然较高，表明此种固体酸催化剂有很好的热稳定性．

Conversion of Glucose to Valuable Platform Chemicals over Graphene Solid Acid Catalyst

Biomass-derived hexose sugars, the most abundant renewable resources in the world, have potential to be the sustainable resources for production of platform chemicals. Here, conversion of glucose is investigated by using sulfonated graphene (rGO-SO₃H) as solid acid catalyst in water without any organic solvent. At first, graphene functionalized with sulfonic acid groups is prepared by using NaH and propane sultone, and then it is characterized by means of XPS, FT-IR, and TEM to confirm the existence of the sulfonic acid groups. The catalytic activity of rGO-SO₃H in the conversion of glucose to valuable chemicals is studied under different reaction conditions. The maximum yield of 5-hydroxymethylfurfural (HMF) is 28.8%, and the total yield of formic acid, lactic acid and HMF is 51.94% when the reaction is conducted at the optimized reaction condition. In addition, the rGO-SO₃H gives a relatively high total yield of the three kinds of products after five run experiments, indicating that the catalyst shows good thermal stability.