Co(salen) supported on graphene oxide for oxidation of lignin |
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| Authors: | Xue‐Fei Zhou Xu‐Jie Lu |
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| Affiliation: | 1. Kunming University of Science and Technology, Kunming, China;2. State Key Laboratory Breeding Base‐Key, Laboratory of Qinghai Province for Plateau Crop Germplasm Innovation and Utilization, Xining, China;3. Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning, China;4. Key Laboratory of Low‐Grade Energy Utilization Technologies and Systems of Ministry of Education of China, Chongqing University, Chongqing, China;5. School of Tropical eco‐Environment Protection, Hainan Tropical Ocean University, Sanya, China |
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| Abstract: | Co(salen) was supported on graphene oxide (GO) (Co‐GO) by covalently grafting. Spectroscopy analyses confirmed its successful synthesis. Co‐GO demonstrated a high activity in the cleavage of βO4 linkage in lignin model compounds. The catalyst was also effective in depolymerizing an organosolv lignin polymer. The polymer residues were separated, and extensively analyzed by FTIR and NMR in order to understand the various structural changes of the polymer occurring versus catalyst. In catalytic oxidation, the βO4 ether linkages were cleaved and the side‐chains were oxidized occurring in the polymer. The polymer was thus converted into smaller monomers called degradation products which were detected by GC‐MS. The evolution of the polymer found that Co‐GO exhibited a significant catalytic effect as compared with Co‐NaY, Co‐MCM‐48, Co‐SSZ‐13. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 44133. |
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| Keywords: | biomimetic catalysts cellulose and other wood products degradation |
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