Aqueous-phase hydrodechlorination and further hydrogenation of chlorophenols to cyclohexanone in water over palladium nanoparticles modified dendritic mesoporous silica nanospheres catalyst

作者：Liu, Yansheng; Dong, Zhengping^*; Li, Xinlin; Le, Xuanduong; Zhang, Wei; Ma, Jiantai

来源：RSC Advances, 2015, 5(27): 20716-20723.

DOI：10.1039/c4ra16471g

• CORE-SHELL NANOPARTICLES
• FIBROUS NANO-SILICA
• SUPPORTED PALLADIUM
• HIGHLY EFFICIENT
• PD
• 2,4-DICHLOROPHENOL
• 4-CHLOROPHENOL
• REDUCTION
• DECHLORINATION
• 4-NITROPHENOL

Dendritic mesoporous silica nanospheres (DMSNs) have been synthesised in this work. The distance of each "arborization" is 7 nm, which plays the role of "pore". Hydrodechlorination (HDC) of 4-chlorophenol (4-CP) as the target compound using Pd modified DMSNs as the catalyst (Pd/DMSNs) is carried out in aqueous sodium hydroxide solution under atmospheric H-2 pressure, fairly mild conditions for a potential application to treat industrial wastewater. Compared with some supported Pd catalysts, Pd/DMSNs exhibit an improved catalytic performance, owing to the specific dendritic structure, which can improve mass transfer, and increase the adsorption-desorption rate of compounds. In this work, both the dechlorination process and further hydrogenation process of 4-CP are studied under various conditions including different catalyst dosages and different temperatures. By analyzing the experimental results, it is clear that the influential factors mentioned above have a strong impact on the selectivity of the HDC experiment. In addition, 2-CP, 3-CP, and 2,4-DCP are also tested as target pollutants.

• 出版日期2015
• 单位兰州大学