Synthesis of zeolites NaA and analcime using rice husk ash as silica source without using organic template

Azizi, Seyed Naser; Yousefpour, Maryam

doi:10.1007/s10853-010-4637-7

Cited by 60 publications

(16 citation statements)

References 16 publications

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“…The results obtained from IR spectroscopy which present the characteristic spectral frequencies of zeolites are in agreement with other data reported in the literature [9].…”

Section: Ir Spectrasupporting

confidence: 91%

Synthesis of NaA zeolite using PTMAOH(phenyltrimethylammoniumhydroxide): hydrothermal and microwave heating methods and comparison of their XRD patterns

Azizi

Samadi‐Maybodi²,

Yarmohammadi³

2012

OJIC

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Ion exchanging is one of the characteristics of the zeolites. Zeolites have octahedral and tetrahedral holes to trap ions and molecules. They also can exchange many ions in solution because of the size of the attendant ions. As a matter of fact, the property of the ion-exchanged zeolites depends on the ligands involved in the ion exchanging solutions. Ion exchanged zeolites are used as catalyst for studying the anodic oxidation of methanol in an acidic medium to investigate their suitability for use in direct methanol fuel cells (DMFCs). Some of the zeolites that have exchanged ions are shown to have redox and catalytic properties [1-3]. As an example A. Itadani et al., have reported the preparation of copper ion exchanged ZSM-5 for calorimetric study of N2 adsorption on Cu-ZSM-5 zeolite [4]. In another study, A. Ribera et al. have reported the characterization of redox properties and application of Fe-ZSM-5 catalysts [5]. In this research we prepared silicate solutions by dissolving silica in sodium hydroxide. Aluminosilicate solutions with different Al/Si ratios were prepared by mixing appropriate quantities of sodium silicate solutions with freshly prepared sodium aluminate solutions and the NaA zeolites were made by hydrothermal method. Then, their XRD patterns and IR spectra were also considered. Obviously, those zeolites which have Al-OH and Si-OH groups can lose their protons in basic solutions. In this way zeolites can adsorb many ions with positive charge. We investigated ion exchange property of Fe3+, Cu2+, Ni2+ and Hg2+ in systems with pH equals to 2, 4, 6 and 8. We found that the aluminosilicate with Si/Al = 1, has greatest exchange capacity for all of the ions studied in this work

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“…The results obtained from IR spectroscopy which present the characteristic spectral frequencies of zeolites are in agreement with other data reported in the literature [9].…”

Section: Ir Spectrasupporting

confidence: 91%

Synthesis of NaA zeolite using PTMAOH(phenyltrimethylammoniumhydroxide): hydrothermal and microwave heating methods and comparison of their XRD patterns

Azizi

Samadi‐Maybodi²,

Yarmohammadi³

2012

OJIC

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“…[10][11][12][13][14] We recently reported the preparation of Al-rich analcime (ANA) with Si/Al ratios of 10-19. [15][16][17] This paper aims to study the structural consequences following the incorporation of Fe +3 and Ni +2 into ANA and attempts to experimentally increase its content to arrive at uniform Fe-Al ANA and Ni-Al ANA. We present evidences of the incorporation of iron and nickel into the framework (channel wall) of ANA by framework vibration Fourier transform infrared (FT-IR) spectroscopic method, powder X-ray diffraction (XRD), diffuse reflectance UV/Vis spectroscopy and nitrogen adsorption.…”

Section: Introductionmentioning

confidence: 99%

Isomorphous Substitution of Iron and Nickel into Analcime Zeolite

Azizi

Yousefpour

2011

Zeitschrift anorg allge chemie

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Studies on the effects of iron and nickel incorporation into the hydrothermal synthesis of ANA zeolite were carried out. The presented work reveals that pure Fe-Al analcime is synthesized by using starting composition with a higher iron(III) content than reported in previous publications. Furthermore, the iron(III) and nickel(II) contents play important roles in the framework of the synthesized zeolite. 759XRD, FT-IR spectroscopy, diffuse reflectance UV/Vis spectroscopy, nitrogen adsorption and SEM were used to characterize the synthesized zeolites. These investigations showed that loading of iron and nickel ions in ANA zeolite changes the pore size and morphology of analcime zeolite.

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“…The strong signal centred at 1007 cm −1 is in the region (950 to 1200 cm −1 ) typical of the intense silicon-oxygen covalent bonds vibrations, indicating the existence of a dense silica network where oxygen atoms bridge two silicon sites (Al-Oweini and ElRassy, 2009). This band is also typical of the T-O-T stretching vibration mode (Azizi and Yousefpour, 2010). In core 1, the main peak at 1007 cm -1 shifts with depth toward higher frequencies, splitting in two peaks partially (Huang and Kerr, 1960; RRUFF, http://rruff.info/).…”

Section: Mineralogy Of the Bankmentioning

confidence: 95%

“…FTIR spectra of the two cores (Fig. 2) reveal absorption bands within the range 420-500 cm -1 related to the T-O-T bending of vibration mode (T=Al, Si) (Azizi and Yousefpour, 2010). The strong signal centred at 1007 cm −1 is in the region (950 to 1200 cm −1 ) typical of the intense silicon-oxygen covalent bonds vibrations, indicating the existence of a dense silica network where oxygen atoms bridge two silicon sites (Al-Oweini and ElRassy, 2009).…”

Section: Mineralogy Of the Bankmentioning

confidence: 99%

Geochemistry and mineralogy of a complex sedimentary deposit in the alkaline volcanic Lake Specchio di Venere (Pantelleria Island, south Mediterranean)

Cangemi

Madonia

Speziale³

2018

J Limnol

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Specchio di Venere is a peculiar, ambient temperature, geothermal, alkaline lake, with lake water oversaturated in carbonate phase where siliceous stromatolites actively grow despite the undersaturation of silica phases. The most of the main sedimentary structures of this lake have been investigated in recent years, with the exception of the carbonate bank running along the southwestern margin of the lake, which is the object of this study. Here we report on the mineralogical and geochemical characterisation of the carbonate bank, based on the study of two cores taken in the area mostly affected by the circulation of fluids of different origin. The ultimate results of our study suggest that silica gel deposits form inside the carbonate bank, following an Alkali-Silica Reaction. These new findings complete the general overview on the sedimentary processes acting in a Lake Specchio di Venere, whose origin is sometimes chemico-physical and sometimes strongly conditioned by microbial activity.

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Synthesis of zeolites NaA and analcime using rice husk ash as silica source without using organic template

Cited by 60 publications

References 16 publications

Synthesis of NaA zeolite using PTMAOH(phenyltrimethylammoniumhydroxide): hydrothermal and microwave heating methods and comparison of their XRD patterns

Synthesis of NaA zeolite using PTMAOH(phenyltrimethylammoniumhydroxide): hydrothermal and microwave heating methods and comparison of their XRD patterns

Isomorphous Substitution of Iron and Nickel into Analcime Zeolite

Geochemistry and mineralogy of a complex sedimentary deposit in the alkaline volcanic Lake Specchio di Venere (Pantelleria Island, south Mediterranean)

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