FTIR study of modification of transition metal on zeolites for adsorption
نویسندگان
چکیده
Adsorption of 1-propanethiol on Co and Cd modified, synthetic (3A, 4A and 13X) zeolites were studied by FTIR (Fourier Transform Infrared) spectroscopy and SEM-EDX (Scanning Electron Microscope-Energy Dispersive X-Ray) graphics. Amount of metal cations on mentioned zeolites was measured by AAS (Atomic Absorption Spectrometer). Based on divalent cations of zeolites, it was assumed that cations may affect their adsorption properties. The nature of the cations present in a given type zeolite markedly affects the physical and chemical feature of the system, for instance, valance and size of cations and their location in the zeolite framework influence adsorption, molecular sieving and catalytic properties. In this study, we used cation exchanged zeolites as adsorbents due to their high surface area. Zeolites with divalent cations show an affinity to adsorp 1-propanethiol comparing to their ordinary positions with monovalent cations. The lack of S−H band in IR spectra gives an idea, that sulphur may make a bond to metal (Cd or Co) or it makes a bond to H atom of isolated OH groups of zeolite surface.
منابع مشابه
MODIFICATION OF CLINOPTILOLITE BY SURFACTANTS FOR MOLYBDATE (99Mo) ADSORPTION FROM AQUEOUS SOLUTIONS
Experiments were conducted to study the ability of surfactant-modified clinoptilolite for molybdate adsorption from aqueous solutions. Clinoptilolite was treated with some cationic surfactants. Adsorption of surfactants on zeolite surface was confirmed by chemical analysis, IR (Infra-Red Spectroscopy), DTG (Derivative Thermogravimetry) and SEM (Scanning Electron Microscopy) techniques. The modi...
متن کاملA new Method for the Removal of Ammonium from Drinking Water Using Hybrid Method of Modified Zeolites / Catalytic Ozonation
Introduction: Ammonia in form of ammonium ions is toxic and could decrease the dissolved oxygen in water and endanger the aquatic life. The aim of this study is the removal of ammonium using oxidation and adsorption by catalytic ozonation and clinoptilolite zeolite, respectively. Methods: The research method is Experimental. First, optimal pH of ammonium adsorption on carbon catalyst (5 g/L), ...
متن کاملTemplate Assisted Method for Enhancing the Zeolite’s Ability to Capture Methionine
To investigate template effect on physicochemical properties of zeolite and enhance the molecular sieving properties, adsorption of methionine amino acid was studied by spectroscopic methods. Four zeolites such as methionine templated analcime, methionine templated zeolite P, N, N-dibenzyl N,N,N,N-tetramethylethylenediamine (DBTMED) templated analcime and free template analcime were synthesized...
متن کاملEnhancement of CO2/CH4 Adsorptive Selectivity by Functionalized Nano Zeolite
In this work, we have modified a synthesized Y-type zeolite (Si/Al = 2.5), with three different amines to investigate of the influence of adsorbent’s surface modification on CO2 selectivity over CH4. The pristine and amine-functionalized NaY zeolites were characterized by X-ray diffraction (XRD), thermal gravimetric analysis (TGA), Fourier transform infrared (FT-IR), and N2 adsorption. The resu...
متن کاملDesign of Biosensors Based Transition-Metal Dichalcogenide for DNA-base Detection: A First-Principles Density Functional Theory Study
The main function purpose of nanobiosensors is to sense a biologically specific material and the kind of sensing platform and doping engineering has been an emerging topic and plays an important role in monolayer molybdenum disulfide (mMoS2). In this paper, we theoretically reveal the electronic structures of mMoS2 doped by 3d transition metals. Furthermore, adsorption of nucleic acid [Adenine ...
متن کامل