TY - EJOUR
AU - Pourahmad, A.
AU - Sohrabnezhad, Sh.
PY - 2024
DA - March
TI - A cost effective and sensitive method for the determination of ammonia concentration in nanocrystal mordenite
T2 - International Journal of Nano Dimension (Int. J. Nano Dimens.)
VL - 1
L1 - https://oiccpress.com/international-journal-of-nano-dimension/article/a-cost-effective-and-sensitive-method-for-the-determination-of-ammonia-concentration-in-nanocrystal-mordenite/
DO - 10.7508/ijnd.2010.02.007
N2 - The reduction capacity of ammonia while present even at ppm level can be demonstrated by the increased encounter probability between ammonia and methylene blue dye (MB+) incorporated in nanomordenite and Na-MOR zeolites. The rate of reduction methylene blue dye by ammonia on the surface nanomordenite zeolite is faster than Na-mordenite (Na-MOR) zeolite.Because nanomordenite zeolite with high silica (Si/Al=15) and surface area 400 (m2/g) is referred to as hydrophobic support with respect to Na-MOR zeolite (Si/Al=6.5). On the other hand, the rate of color bleaching of MB+ by ammonia was found to be fastest in proton form of nanomordenite and mordenite zeolites. The results obtained with the zeolites were also compared with non-ionic micelle (TX-100). The calibration graph is valid for wide range of concentrations in nanomordenite zeolite. The limit of detection (LOD) is 0.12 mg ml-1. This method is simple, sensitive and easy to carry out. By using only a UV-visible spectroscopy, ammonia can be quantified.
IS - 2
PB - OICC Press
KW - Methylene Blue, UV-VIS, Ammonia, Nanocrystal, Zeolite. 
EN -