气溶胶法制备纳米Ni@SiO2及其对肉桂醛催化加氢的研究
Aerosol synthesis of nano Ni@SiO2 and its catalytic hydrogenation of cinnamaldehyde
聂震 1季凯 1姜兴茂1
作者信息
- 1. 湖北省新能源材料工程技术研究中心,绿色化工过程省部共建教育部重点实验室,湖北省新型反应器与绿色化学工艺重点实验室,武汉工程大学化工与制药学院,湖北 武汉 430205
- 折叠
摘要
通过气溶胶方法喷雾热解制备出了具有"火龙果型"结构的Ni@SiO2 纳米颗粒催化剂.载体硅球与金属纳米颗粒的单分散性良好.通过X射线衍射、透射电子显微镜、氮气物理吸附仪等表征手段对样品进行检测.可以得到平均比表面积约340 m2/g,平均孔径约3.4 nm,平均孔容约0.16 cm3/g的Ni@SiO2 催化剂颗粒.其中载体二氧化硅球粒径分布于50～500 nm,金属Ni颗粒粒径分布于2～6 nm.作为催化剂进行肉桂醛催化加氢实验,以气相色谱作为检测方式,当溶剂为异丙醇,温度为160℃,氢气压力为2 MPa,反应时间为2h时,所得肉桂醛转化率为98.5%,苯丙醛收率为76.8%.
Abstract
A Ni@SiO2 nanoparticle catalyst with a"pitaya"structure was prepared by aerosol spray pyrolysis.The carrier silicon spheres and metal nanoparticles have good monodispersity.The samples were characterized by X-ray diffraction,transmission electron microscopy,nitrogen physical adsorption and other methods.The obtained Ni@SiO2 catalyst particles have an average specific surface area of about 340 m2/g,an average pore size of about 3.4 nm,and an average pore volume of about 0.16 cm3/g.The particle size of the carrier silica spheres is distributed between 50-500 nm,and that of Ni particles is between 2-6 nm.Ni@SiO2 was used as the catalyst for catalytic hydrogenation of cinnamaldehyde,and gas chromatography was used as the detection method.Under the conditions where the solvent was isopropanol,temperature was 160℃,hydrogen pressure was 2 MPa,and reaction time was 2 hours,the cinnamaldehyde conversion rate obtained was 98.5%,and the phenylpropionaldehyde yield was 76.8%.
关键词
Ni@SiO2/气溶胶法/肉桂醛/加氢Key words
Ni@SiO2/aerosol method/cinnamaldehyde/hydrogenation引用本文复制引用
基金项目
国家自然科学基金(21878237)
武汉市应用基础前沿项目(2108010401011291)
出版年
2024
国家科技期刊平台
NSTL
万方数据