Mesoporous CeO2 Catalyst Synthesized by Using Cellulose as Template for the Ozonation of Phenol |
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| Authors: | Lan-He Zhang Zheng-Qian Liu Jing-Bo Guo |
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| Affiliation: | 1. School of Chemical Engineering, Northeast Electric Power University, Jilin 132012, PR China;2. School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China;3. School of Civil Engineering, Northeast Electric Power University, Jilin 132012, PR China |
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| Abstract: | Mesoporous CeO2 was synthesized by a sol-gel method using the biological renewable microcrystalline cellulose (MCC) as the template and Ce(NO3)3?6H2O as the precursor of CeO2. XRD, TEM, N2 adsorption–desorption, and XPS were used for mesoporous CeO2 characterization. The results show that CeO2 nano-particles possess an average size of 7 ~ 10 nm, and specific area of CeO2 synthesized with MCC template is approximately 5.5 times higher than CeO2 synthesized without MCC. The ozonation catalyzed by CeO2-T (with MCC) could remove 91.7% of phenol compared to 51.6% for single ozonation and 68.3% for CeO2-W (without MCC) catalyzed ozonation. The COD removal efficiency is significantly higher for ozonation with CeO2-T (69.2%) than that of CeO2-W (49.5%) or ozonation alone (21.0%). The good performance of CeO2-T is attributed to the high specific area and Ce(III)/Ce(IV) redox couple. During catalytic ozonation, the activation energy of catalytic ozonation (20.7 kJ mol?1) is much lower than that of single ozonation (54.7 kJ mol?1). |
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| Keywords: | Activation energy catalytic ozonation hydroxy radical mesoporous ceo2 microcrystalline cellulose phenol |
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