摘要
为提升磁性催化剂的催化效率,研究磁性Fe_(3)O_(4)纳米粒子催化剂的制备及其催化性能。用四氯化钛、无水乙醇、氯化铁等分别制备磁基体Fe_(3)O_(4),以及Fe_(3)O_(4)与四氯化钛摩尔比为19∶1、9∶1、17∶3、4∶1的4种催化剂材料。将四硝基苯酚、硼氢化钠等作为待催化材料,用不同催化剂进行催化还原试验,用紫外-可见分光光度计、振动样品磁强计等测试催化剂的磁性能和催化性能。结果表明:4种催化剂均呈现出一定的磁强度,催化1 min后转化率均较高。其中,摩尔比为4∶1的催化剂磁性能更强,矫顽力可达0.54 A/m,为4组催化剂中最高,其催化时间更短,催化速率较快,在8次循环催化后仍保持99%以上的转化率。
In order to improve the catalytic efficiency of magnetic catalyst,the preparation and catalytic performance of magnetic Fe_(3)O_(4)nanoparticle catalyst were studied.The magnetic substrate Fe_(3)O_(4)was prepared and four catalyst materials with molar ratio of Fe_(3)O_(4)to titanium tetrachloride 19∶1,9∶1,17∶3 and 4∶1 were prepared by using titanium tetrachloride,anhydrous ethanol and ferric chloride.Using tetranitrophenol and sodium borohydride as catalyst materials,catalytic reduction tests were carried out with different catalysts.The magnetic properties and catalytic properties of the catalysts were measured by UV-visible spectrophotometer and vibrating sample magnetometer.The results showed that all the four catalysts show a certain magnetic strength,and the conversion rate is higher after 1 min of catalysis.Among them,the catalyst with molar ratio of 4∶1 has stronger magnetic properties and coercivity up to 0.54 A/m,which is the highest among the 4 groups of catalysts.Its catalytic time is shorter,the catalytic rate is faster,and the conversion rate remains above 99%after 8 cycles of catalysis.
作者
姜姗姗
王恩通
JIANG Shanshan;WANG Entong(Department of Chemistry and Chemical Engineering,LYUliang University,Lüliang 033000,China)
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2024年第3期58-62,共5页
Ordnance Material Science and Engineering
基金
吕梁市引进高层次科技人才项目(2023RC14)
山西省基础研究计划(自由探索类)资助项目(青年项目)(202303021212289)。
