Journal
MATERIALS
Volume 16, Issue 23, Pages -Publisher
MDPI
DOI: 10.3390/ma16237330
Keywords
zeolite NaY; cogon grass; paraquat adsorption; acid-refluxed; uniform crystal size
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Adding cogon grass to the synthesis gel can prevent agglomeration of zeolite NaY and improve its crystallinity and surface area. The optimum amount of grass to add is 1 gram.
Zeolite NaY synthesized from a typical procedure could suffer from agglomeration. Adding non-refluxed cogon grass (NG) to the synthesis gel could produce NaY with good dispersion and uniform crystal size. Small molecules produced from cogon grass in alkaline conditions could prevent agglomeration. The obtained zeolite (Y-NG) has a crystallinity and surface area comparable to the synthesis without grass (Y-WG). Y-NG demonstrated similar paraquat adsorption capacity to Y-WG at high initial concentrations. On the other hand, the zeolite from the addition of acid-refluxed grass (Y-RG) has the lowest crystallinity, smallest surface area, and poorest paraquat adsorption capacity. The effect of grass amount on the zeolite structure was studied. One gram of cogon grass was the optimum amount to add to the synthesis gel.
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