| dc.description.abstract | This thesis consists of two parts. In the first part, the sulfonic acid functionalized mesoporous silicas (K6SX and S15SX) have been successfully synthesized by one-pot synthesis using tetraethoxysilane (TEOS) and mercaptopropyltrimethoxysilane (MPTMS) as silicon source, P123 as a soft template and hydrogen peroxide as an oxidant in an acidic environment. According to the BET result, the surface area of K6S20 and S15S20 was confirmed about 682.6 m2/g and 452.5 m2/g. Because of the high surface area, good pore volume, and rich in sulfonic acid functional groups, K6S20 and S15S20 might have a good performance in the reaction of fructose hydrolysis to produce 5-hydroxymethylfurfural (HMF). Among all the as-prepared catalysts, K6S20 exhibited the highest HMF yield of 87.42 % at 135oC with 20 mg catalyst, 3 ml DMSO and 1 mmol fructose.
In the second part, palladium nanoparticles embedded in mesoporous N-doped carbon material (N-CMK-9), which was synthesized by nanocasting, through the double agent chemical reduction method as a catalytic catalyst. N-doped carbon material N-CMK-9 has a high surface area, good pore volume, defective CN sites and nitrogen gaps, so palladium nanoparticles could be uniformly dispersing in the materials to improve the catalytic activity. According to the TEM images, the particle size of the palladium nanoparticles was confirmed about 2-6 nm and 2-5 nm. The Pd(X)@C9 and Pd(X)@NC9 exhibited high catalytic activity for the reduction of environmentally harmful Cr(VI) to Cr (III). Among all the as-prepared catalysts, Pd(2)@NC9 exhibited the highest turnover frequency of 1.72 min-1. | en_US |