Green Chemistry p. 4936 - 4943 (2014)
Update date:2022-08-16
Topics:
Poonjarernsilp, Chantamanee
Sano, Noriaki
Sawangpanich, Nut
Charinpanitkul, Tawatchai
Tamon, Hajime
The effect of dispersion of Fe/Fe2O3 nanoparticles in sulfonated single-walled carbon nanohorns (SO3H/SWCNHs) on their catalytic activity for the esterification of palmitic acid was investigated. A gas-injected arc-in-water (GI-AIW) method was employed to initially synthesize SWCNHs dispersed with iron nanoparticles (Fe-SWCNHs). The Fe-loading amount in the Fe-SWCNHs was varied by changing the number of Fe wires inserted in an anode. The results showed that Fe-loading amount proportionally increased from 6 to 13 wt% with an increase in the number of Fe wires. The surfaces of the Fe-SWCNHs were functionalized with acid functional groups by two sequential steps: impregnation of sulphuric acid and calcination in air. From the characterization results, their acid site concentrations were estimated to be 5.6-8.5 mmol g-1, suggesting that the catalyst was a solid superacid catalyst. XRD analyses indicated that most of the Fe was transformed to α-Fe2O3. The catalytic activity of the SO3H/Fe-SWCNHs for the esterification of palmitic acid was evaluated to investigate the influence of the Fe-loading on their catalytic activity. The results showed that the yield of methyl palmitate was significantly enhanced by an increase in the Fe-loading amount. It was discovered that the catalytic activity and the magnetic susceptibility of SO3H/Fe-SWCNHs can be preserved during repeated use, if the Fe-loading amount is large enough.
View MoreNingbo Inno Pharmchem Co., Ltd.
Contact:86-574-87319282
Address:6F-5,NO.163 RUIQING RD.,NINGBO 315000 CHINA
shandong zhongke taidou chemical co.,ltd
Contact:86-531-88682301
Address:Jinan shandong Province CHina
SHIJIAZHUANG HENRYTE CHEMICALS CO,.LTD
Contact:+86-311-85208698 311-80837698
Address:NO.166, yuhua west road, SHIJIAZHUANG, China
Dalian Join King Biochemical Tech. Co., Ltd.
Contact:0411 39216206
Address:814 First State Blvd
Nanjing chemipioneer pharmaceutical & technology Co., LTD
website:http://www.chemipioneer.com.cn
Contact:+86-25-52685700
Address:Room 305,A Block,Biological-Medicine Building,Business Start-up Center,Xin-ke 1st Road, High-tech development zone,Nanjing city,Jiangsu Province, China
Doi:10.1039/c6ra17137k
(2016)Doi:10.1002/hlca.201700302
(2018)Doi:10.1016/0022-5088(85)90346-7
(1985)Doi:10.1021/ic020475m
(2003)Doi:10.1081/SCC-120021977
(2003)Doi:10.1021/jo00387a005
(1987)