Preparation and properties of zirconia nanotube-supported 12-tungstophosphoric acid catalyst

• 来源期刊: 中国化学快报（英文版）
• 年，卷（期）: 2018,（2）
• 页码范围: 317-320
• 页数: 4页
• 语种: 英文

摘要

Zirconia nanotube-supported H3PW12O40 (HPW) catalysts were obtained by loading HPW onto zirconia nanotube arrays which were prepared through anodization of zirconium foil in the mixture of formamide and glycerol (volume ratio =1 ∶ 1) containing 1 wt％ NH4F and 1 wt％ H2O.The samples were characterized through scanning electron microscope,X-ray diffraction,infrared spectra and thermogravimetric analysis.Various factors affecting the catalytic activities have been investigated.The catalysts,prepared through pretreating the nanotube carrier at 400 ℃,followed by loading with 35 wt％ HPW and calcining at 200 ℃,possess high catalytic activities in the synthesis of fatty acid ethyl ester.Under the optimal reaction conditions,the conversion percentages of lauric acid,oleic acid and stearic acid are all higher than 98.5％.