Synthesis, Characterization and Catalytic Activity of Iron and Copper Modified Nanozeolite L Synthesized from Rice Husk Silica
| dc.contributor.author | Jia Tian, Wong | |
| dc.date.accessioned | 2018-08-02T07:05:17Z | |
| dc.date.available | 2018-08-02T07:05:17Z | |
| dc.date.issued | 2015-07 | |
| dc.description.abstract | Fe(III) and Cu(II) modified nanozeolite L were successfully synthesized from rice husk silica using hydrothermal method. The catalysts were designated as Fe/KL and Cu/KL. The resultant catalysts exhibited type I and type IV BET isotherms suggesting the catalysts were meso-microporous materials. The FTIR pyridine adsorption studies on Fe/KL and Cu/KL revealed the presence of strong Lewis acid sites. AAS, DR UV-Vis and XPS confirmed the successful incorporation of metals ions into the zeolite framework. The amount of Fe3+ and Cu2+ incorporated were 1.15 and 1.16 wt.%. The formation of tablet-shape nanozeolite L was shown from the TEM analysis of Fe/KL and Cu/KL with an average particle size of 121 and 224 nm respectively. The hydroxylation of phenol and 4-chlorophenol to its benzenediols in the presence of acetic acid over Fe/KL and Cu/KL was investigated and found to be a facile and effective method. The hydroxylation of phenol with these catalysts gave CAT and HQ as products. High conversion of phenol of 93.4 and 77.6% was registered when Fe/KL and Cu/KL were used respectively. The 4-chlorophenol hydroxylation yielded maximum conversion of 84.1 and 57.7% over Fe/KL and Cu/KL respectively. The hydroxylation products of 4-chlorophenol were 4-CCAT and HQ. All the metal supported catalysts were found to be reusable for the hydroxylation of phenol and 4-chlorophenol without significant loss of activity during the recycling study. Leaching of Fe3+ and Cu2+ was minimal during the catalysis | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/6135 | |
| dc.subject | Iron | en_US |
| dc.subject | Nanozeolite L | en_US |
| dc.title | Synthesis, Characterization and Catalytic Activity of Iron and Copper Modified Nanozeolite L Synthesized from Rice Husk Silica | en_US |
| dc.type | Thesis | en_US |
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