Evaluation of phase transformation behaviors of zeolite and antibacterial properties against Gram‐positive and ‐negative bacteria,Journal of the Chinese Chemical Society

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Evaluation of phase transformation behaviors of zeolite and antibacterial properties against Gram‐positive and ‐negative bacteria
Journal of the Chinese Chemical Society ( IF 1.6 ) Pub Date : 2020-05-25 , DOI: 10.1002/jccs.202000046
Siti Nabihan Ishak ₁ , Nik Ahmad Nizam Nik Malek ₁ , Zulkifli Yusop ₂ , Craig D. Williams ₃ , Suhartono Suhartono ₄ , Achmad Syafiuddin ₂

Affiliation

This study deals with the synthesis of zeolite from natural kaolinite using hydrothermal treatment and evaluation of its phase transformation behaviors. The synthesized zeolites were modified with silver ion by using the ion exchange method for the enhancement of antibacterial properties. The characterizations were performed by using X‐ray diffraction spectroscopy, Fourier‐transform infrared spectroscopy, field emission scanning electron microscopy, and energy‐dispersive X‐ray. Disk diffusion technique (DDT) was used for the evaluation of the antibacterial property of the modified zeolites. This study observed the transformation of kaolinite into amorphous metakaolin after calcination treatment at 900°C and the successful reconstruction of amorphous metakaolin into synthesized crystal zeolite in the presence of sodium hydroxide as an activating agent. It was also found that the zeolite type A was produced at 100°C, while sodalites were produced at 120 and 140°C. DDT analysis revealed that the modified zeolites showed significant antibacterial capability against Escherichia coli ATCC 11229 and Staphylococcus aureus ATCC 6538. In general, the present study has proven that the zeolites can be synthesized from natural material and can be modified with silver ion to enhance their antibacterial activity.

中文翻译：

评估沸石的相变行为和对革兰氏阳性和阴性细菌的抗菌性能

这项研究涉及使用水热处理从天然高岭石合成沸石并评估其相变行为。通过离子交换法用银离子对合成的沸石进行改性，以增强抗菌性能。通过使用X射线衍射光谱，傅立叶变换红外光谱，场发射扫描电子显微镜和能量色散X射线进行表征。圆盘扩散技术（DDT）用于评估改性沸石的抗菌性能。这项研究观察了在900°C下煅烧处理后高岭石向无定形偏高岭土的转化，以及在氢氧化钠作为活化剂存在下成功地将无定形偏高岭土重构为合成的晶体沸石。还发现A型沸石是在100℃下生产的，而方钠石是在120和140℃下生产的。滴滴涕分析表明，改性沸石具有显着的抗菌能力大肠杆菌ATCC 11229和金黄色葡萄球菌ATCC6538。总的来说，本研究证明了沸石可以由天然材料合成，并且可以用银离子修饰以增强其抗菌活性。

更新日期：2020-05-25

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