NiAl-LDHs/SiO2 Composite: Preparation and Application in Benzoin Ethyl Ether Synthesis

作者：Wang Guo Qiang; Xie Xian Mei^*; Gao Cheng Yun; Wu Xu; An Xia; Cheng Shu Yan

来源：Chinese Journal of Inorganic Chemistry, 2011, 27(5): 917-922.

• NiAl-LDHs
• silicon dioxide
• the synthesis of benzoin ethyl ether
• benzaldehyde

A surface-covered NiAl-LDHs composite NiAl-LDHs/SiO2 was prepared by coprecipitation method using silicon dioxide as supporter. The composite was characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR) and N-2-adsorption/desorption measurement, and its catalytic performance was evaluated in terms of benzoin ethyl ether synthesis by reaction between benzaldehyde and methanol. The results show that the NiAl-LDHs and SiO2 are combined each other through the stable chemical bond of Si-O-Al and Si-O-Ni in the composite. NiAl-LDHs is distributed uniformly on the surface of SiO2 and the composite has high specific surface area. Additionally, the synthesis of benzoin ethyl ether was performed with NiAl-LDHs/SiO2 of 20% LDHs loadings as the catalyst at 70 degrees C for 60 min. The results show that conversion rate of benzaldehyde could reach 61.8% with the selectivity of benzoin ethyl ether nearly 100% and that NiAl-LDHs/SiO2 has higher catalytic activity than single NiAl-LDHs.

• 出版日期2011-5
• 单位太原理工大学