Recent advances in the science and technology of natural zeolites in Iran

Abstract

Iran has significant deposits of high-purity natural zeolites. Many Iranian scholars conduct scientific research on porous materials, from natural and synthetic zeolites to metal organic framework materials. Iranian zeolite deposits and associated research are reviewed here. Various industrial applications of natural zeolites, from agriculture to animal husbandry to the construction industry and beyond are discussed here.

The photocatalytic rate of ZnO supported onto natural zeolite nanoparticles in the photodegradation of an aromatic amine

“…In this work, for enhancing the photocatalytic activity of ZnO, it was supported on the clinoptilolitenanoparticles (CNP). Generally zeolites have an internal electric eld which helps to the prevention of the photogenerated e/h pairs in the photoexcited supported semiconductor (Behin et al 2019;Divband et al 2019;Rahimi et al 2019). The n-type ZnOsemiconductor is a highly transparent material that has a band gap energy of about 3.3 eV for the direct electronic transition.…”

The coupled WO3-AgBr nanocatalyst, part II: Synthesis, characterization, and the boosted photocatalytic activity towards metronidazole in an aqueous solution

“…Various strategies have been suggested to decrease e/h recombination like metal/nonmetal doping, supported semiconductors, coupled semiconductors systems, and nano-dimension catalysts, etc. [ [42] , [43] , [44] , [45] , [46] , [47] , [48] , [49] , [50] , [51] , [52] , [53] , [54] , [55] , [56] , [57] , [58] , [59] ].…”

Study of secondary porosity by SAXS and N2 adsorption in composite materials obtained from a Cuban natural clinoptilolite

“…It owns a Si/Al ratio of about 5 and a cation exchange capacity of about 2 mEq g −1 3,13 . This zeolite has been extensively used for the removal of radioactive cations, heavy metals, and ammonium 14,15 . It has been also employed in animal feed, as well as fertilizer and soil improver in agriculture 15 .…”

“…This zeolite has been extensively used for the removal of radioactive cations, heavy metals, and ammonium 14,15 . It has been also employed in animal feed, as well as fertilizer and soil improver in agriculture 15 . The modification with cationic surfactants makes possible the adsorption of monoaromatic hydrocarbons, xylene isomers, drugs and the exchange of anions and oxianions 16–20 .…”