| Atom-economy Synthesis of N-substituted Carbamate from Urea Derivative and Dimethyl Carbonate Catalyzed by La/SiO2: Characterization and Activity | |
| Department | 绿色化学研究发展中心 |
Guo XG(郭晓光); Shang JP(尚建鹏) ; Li J(李健); Wang LG(王利国); Ma YB(马昱博); Shi F(石峰); Deng YQ(邓友全)
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| 2010 | |
| Source Publication | Chinese Journal of Chemistry
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| ISSN | 1001-604X |
| Volume | 28Pages:164-170 |
| Abstract | A series of silica gel immobilized lanthanum catalysts were prepared for the atom-economy synthesis of N-substituted carbamates from urea derivatives and dimethyl carbonate. The La/SiO2 catalysts with lanthanum loadings varied from 1.3 wt% to 8.5 wt% were characterized by AES, BET, XRD, TEM, FT-IR, XPS and TPD. According to the characterization, lanthanum species with particle sizes of 5—10 nm on the surface of silica gel were formed. The catalysts were all amorphous and the surface areas were 336.5—530.2 m2/g. NH3-TPD analysis showed that all samples exhibited similar acid strength with different acid amounts. FT-IR measurement indicated that the component of lanthanum speci es on the catalyst surface were La(OH)3, LaOOH and hydrated La2O3. Also, the peak value of the absolute amount of LaOOH was obt ained with 4.3 wt% lanthanum loading. The BET surface area decreased dramatically when the lanthanum loading was above 4.3 wt%. In consideration of the results ob-tained from the catalytic reactions, it could be concluded that LaOOH was the possible active species and high sur-face area was important for the high catalytic activity. |
| Keyword | N-substituted Carbamate Urea Derivative Dimethyl Carbonate Lanthanum Green Chemistry |
| Subject Area | 物理化学 |
| Funding Organization | the National Natural Science Foundation of China (No. 20503037) |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 绿色催化课题组 |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/2304 |
| Collection | 绿色化学研究发展中心 |
| Corresponding Author | Shi F(石峰); Deng YQ(邓友全) |
| Recommended Citation GB/T 7714 | Guo XG,Shang JP,Li J,et al. Atom-economy Synthesis of N-substituted Carbamate from Urea Derivative and Dimethyl Carbonate Catalyzed by La/SiO2: Characterization and Activity[J]. Chinese Journal of Chemistry,2010,28:164-170. |
| APA | 郭晓光.,尚建鹏.,李健.,王利国.,马昱博.,...&邓友全.(2010).Atom-economy Synthesis of N-substituted Carbamate from Urea Derivative and Dimethyl Carbonate Catalyzed by La/SiO2: Characterization and Activity.Chinese Journal of Chemistry,28,164-170. |
| MLA | 郭晓光,et al."Atom-economy Synthesis of N-substituted Carbamate from Urea Derivative and Dimethyl Carbonate Catalyzed by La/SiO2: Characterization and Activity".Chinese Journal of Chemistry 28(2010):164-170. |
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| File Name/Size | DocType | Version | Access | License | ||
| Chin. J. Chem. 2010 （118KB） | 开放获取 | License | View Application Full Text | |||
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