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|Title: ||Production of silver-doped analcime by isomorphous substitution technique|
|Authors: ||Kwakye-Awuah, Bright|
Kenward, M. A.
Williams, C. D.
|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
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|
|Appears in Collections:||College of Science|
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