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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/12630

Title: Production of silver-doped analcime by isomorphous substitution technique
Authors: Kwakye-Awuah, Bright
Radecka, I.
Kenward, M. A.
Williams, C. D.
Keywords: analcime
silver-doped analcime
isomorphous substitution
characterisation
Issue Date: 14-Apr-2008
Publisher: Society of Chemical Industry
Citation: B. Kwakye-Awuah et al., Production of silver-doped analcime by isomorphous substitution technique, DOI: 10.1002/jctb.1938
Abstract: BACKGROUND: Metal-exchanged zeolites have been reported to have significant limitations on cayalytic activity, such as counterbalancing the negative framework charges and limitation of active space. Alternative methods of incorporating silver ions into the framework of zeolites are therefore necessary. This paper reports on a technique for producing silver doped analcime by isomorphous substitution of silver ion into the framework of analcime. The amount of aluminium in the gel composition was reduced by a factor of 5%, 10% and 20% and an equivalent amount of silver was added to the gel and treated in a conventional manner for zeolite crystallisation. Some of the aluminium in the reaction gel was replaced with the silver. The silver-doped analcime samples where characterised by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-rays (EDX), Fourier transform infrared (FTIR) spectroscopy and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) analysis. RESULTS: The amount of silver ions loaded for each reduction of aluminium as determined by EDX were found to be (w/w) 0.29%, 1.41% and 2.10%, respectively. XRD pattern SEM images of the silver-doped analcime showed the presence of zeolite P in addition to analcime. CONCLUSION: Silver-doped analcime was successfully produced with different silver loadings and may exhibit higher anti-microbial activities than silver-exchanged counterparts.
Description: An article published by Society of Chemical Industry and also available at DOI: 10.1002/jctb.1938
URI: http://hdl.handle.net/123456789/12630
Appears in Collections:College of Science

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