| Autor: |
Chokkalingam Anand, Takeshi Kaneda, Satoshi Inagaki, Sae Okamura, Hiroki Sakurai, Kyosuke Sodeyama, Taiji Matsumoto, Yoshihiro Kubota, Tatsuya Okubo, Toru Wakihara |
| Předmět: |
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| Zdroj: |
New Journal of Chemistry; 2016, Vol. 40 Issue 1, p492-496, 5p |
| Abstrakt: |
Herein, we report the preparation of potassium chabazite (K-CHA) zeolite nanocrystals with enhanced base-catalytic performance using a bead-milling and postmilling-recrystallization technique. Particles as small as 60 nm were produced by this approach. The surface area of the downsized K-CHA samples showed a significant improvement, increasing from 11 m2g−1to 65 m2g−1. The catalytic activity of the K-CHA nanocrystals in the Knoevenagel condensation of benzaldehyde with ethyl cyanoacetate was found to be twofold higher than that of the raw and the milled samples, achieving 80% product yield within a reaction time of 60 min. In addition, the enhanced catalytic behavior of the K-CHA nanocrystals, despite possessing low surface area relative to the intermediate milled sample, is attributable to the postmilling-recrystallization step, which played a pivotal role in restoring the crystallinity to around 80%. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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