Premium
Single‐step process without organic template for the formation of zeolite A from RHA
Author(s) -
Kumar Amit,
Naskar Milan K.
Publication year - 2019
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13206
Subject(s) - zeolite , husk , materials science , crystallization , physisorption , dissolution , sorption , fourier transform infrared spectroscopy , chemical engineering , adsorption , sodium aluminate , nuclear chemistry , autoclave , desorption , diffractometer , bet theory , metallurgy , chemistry , scanning electron microscope , organic chemistry , catalysis , aluminium , composite material , botany , engineering , biology
Dice‐shaped zeolite A (NaA) was prepared via direct dissolution of rice husk ash (96.5% SiO 2 ) in the presence of NaOH and sodium aluminate solution by autoclave process at 90°C/6 h without using any templating agent. The prepared particles were characterized by DTA/TG, XRD, FTIR, N 2 adsorption‐desorption physisorption analysis, FESEM, and TEM. XRD results confirmed crystallization of pure NaA zeolite phase. FTIR study shows the characteristic bands at 554 cm −1 for double 4 membered ring (D4R) of NaA zeolite. The total BET surface area of the product was found to be 31.6 m 2 g −1 . FESEM and TEM images show dice shaped NaA particles of size around 1 μm which is formed via oriented crystalline aggregation of primary particles (30‐40 nm). A tentative mechanism was proposed for the formation of NaA crystals through direct dissolution of rice husk ash. The synthesized NaA zeolite could be used for purification of alcohol and separation of toxic and radioactive ions from waste water via a cost‐effective process.