School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, Jiangsu, PR China.
School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, Jiangsu, PR China.
Bioresour Technol. 2018 Sep;264:58-65. doi: 10.1016/j.biortech.2018.05.026. Epub 2018 May 8.
This work studied a facile and template-free hydrothermal route for controlled synthesis of tungsten trioxide in the form of hexagonal nanorod (h-WO) and monoclinic nanosheet (m-WO). The surface morphology, crystal plane, surface bound water, and surface acid sites of the two kinds of WO nanocrystals were investigated systematically. They were further evaluated as catalysts for selective cellulose hydrolysis. While both of them exhibited good catalytic performance, h-WO was found to be more preferential for ethylene glycol (EG) generation. This catalytic performance relied on both the unique active crystal surface (1 0 0) and surface binding water (WO-HO) formed by h-WO crystals, which provided more Lewis acid sites for degrading cellulose into EG. Results showed that the highest EG yield reaches 77.5% by a combination of loading 1 wt% Ru on the h-WO catalyst.
这项工作研究了一种简便且无模板的水热法，用于控制合成六方纳米棒（h-WO）和单斜纳米片（m-WO）形式的三氧化钨。系统研究了两种 WO 纳米晶体的表面形态、晶面、表面结合水和表面酸位。进一步将它们评估为选择性纤维素水解的催化剂。虽然它们都表现出良好的催化性能，但 h-WO 更有利于生成乙二醇（EG）。这种催化性能依赖于 h-WO 晶体形成的独特活性晶面（1 0 0）和表面结合水（WO-HO），它为将纤维素降解为 EG 提供了更多的路易斯酸位。结果表明，通过在 h-WO 催化剂上负载 1wt% Ru，EG 的最高收率可达 77.5%。
