scholarly journals H-ZSM-5 Zeolite Synthesis by Sourcing Silica from the Wheat Husk Ash: Characterization and Application as a Versatile Heterogeneous Catalyst in Organic Transformations including Some Multicomponent Reactions

2015 ◽  
Vol 2015 ◽  
pp. 1-14 ◽  
Author(s):  
Isak Rajjak Shaikh ◽  
Rafique Ahmed Shaikh ◽  
Alamgir Abdulla Shaikh ◽  
Javeed Ahmad War ◽  
Shankar Poshetti Hangirgekar ◽  
...  
Keyword(s):  
Multicomponent Reactions ◽  
Protonated Form ◽  
Acid Sites ◽  
Zeolite Synthesis ◽  
Organic Transformations ◽  
Exchange Method ◽  
Zeolite Sample ◽  
Ft Ir ◽  
Ion Exchange Method ◽  
Wheat Husk

ZSM-5 zeolite was synthesized by sourcing silica from wheat husk ash and was converted into its protonated form following careful, conventionally accepted ion-exchange method and calcinations. The H-ZSM-5 zeolite (Si/Al ratio = 30) prepared was appropriately characterized by XRD, FT-IR, SEM, TEM, TG-DTA, CV, and so forth, and evaluated as recyclable catalyst in selective organic transformations including three- and four-component reactions. The catalytic activity of the zeolite sample supposedly relates to increased density of the accessible acid sites.

scholarly journals Incorporation of silver (I) ions within zeolite cavities and their photocatalytic reactivity for the decomposition ofN2OintoN2andO2

2003 ◽  
Vol 5 (1) ◽  
pp. 17-19 ◽  
Author(s):  
Woo-Sung Ju ◽  
Masaya Matsuoka ◽  
Masakazu Anpo
Keyword(s):  
Ion Exchange ◽  
Uv Light ◽  
Photocatalytic Decomposition ◽  
Effective Wavelength ◽  
In Situ Characterization ◽  
Exchange Method ◽  
Ft Ir ◽  
Ion Exchange Method

Ag+/ZSM-5 catalysts were prepared by an ion-exchange method. UV-irradiation of theAg+/ZSM-5 catalysts in the presence ofN2Oled to the photocatalytic decomposition ofN2OintoN2andO2at 298 K. Investigations of the effective wavelength of the irradiated UV-light for the reaction as well as the in-situ characterization of the catalysts by means of UV-Vis, photoluminescence and FT-IR spectroscopies revealed that the photoexcitation of theAg+−N2Ocomplexes formed between gaseousN2Oand the isolatedAg+ions exchanged within the zeolite cavities plays a significant role in the reaction.

Preparation and Characterization of Mg-Al/Zn-Al Layered Double Hydroxides Intercalated with Calcein

2016 ◽  
Vol 852 ◽  
pp. 300-307
Author(s):  
Xia Hui Peng ◽  
Lin Qi Liu ◽  
Xia Wu ◽  
Chen Xi Zhao ◽  
Xiao Mei Wang ◽  
...  
Keyword(s):  
Complex System ◽  
Intercalation Compounds ◽  
Exchange Method ◽  
Interlayer Region ◽  
Ft Ir ◽  
Ion Exchange Method ◽  
Photochemical Properties ◽  
Double Hydroxides ◽  
Thermal Stability Of

The intercalation of calcein into Mg/Al-NO3-LDHs and Zn/Al-NO3-LDHs by co-precipitaiton and ion-exchange method has been investigated. The obtained intercalation compounds were characterized by XRD, FT-IR and TG-DSC techniques. The results show that the original interlayer nitrate ions can be replaced by the organic anions under the controlled conditions. From the XRD data, the guest size and the orientation of anions between the layers were determined and after intercalation the interlayer spaces of the materials are expanded to 1.81 nm. FT-IR and DSC/TG curves reveal the presence of a complex system of supramolecular host-guest interaction and the increase of thermal stability of materials and the photochemical properties of compounds were studied by UV-Vis adsorption spectroscopy. These results indicate that the confinement of the UV absorbents in their anionic form within the restricted space of the interlayer region of LDHs is in favor of guest-host and guest-guest interactions, so that the UV aborption range and ability of the intercalation compounds are changed.

Synthesis of Chitosan Protected Nickel Hexacyanoferrate Modified Titanium Oxide Nanotube and Study its Application on Simultaneous Electrochemical Detection of Paracetamol and Caffeine

2014 ◽  
Vol 938 ◽  
pp. 192-198 ◽  
Author(s):  
Selvaraj Devi ◽  
Kannaiyan Pandian
Keyword(s):  
Titanium Oxide ◽  
Electrochemical Detection ◽  
Electrochemical Behaviour ◽  
Potassium Ferricyanide ◽  
Exchange Method ◽  
Nickel Ion ◽  
Nickel Hexacyanoferrate ◽  
Electrocatalytic Property ◽  
Ft Ir ◽  
Ion Exchange Method

The nickel hexacyanoferrate decorated titanium oxide nanotube (NiHCF@TNT) was prepared by ion exchange method by mixing of nickel ion modified titanium oxide nanotube with a known amount of potassium ferricyanide under stirring over a period of 5 h. The resulting product was isolated and then characterized with XRD, FT-IR and SEM. The electrochemical behaviour of NiHCF@TNT was investigated by cyclic voltammetry using chitosan as stabilizing agent. The electrocatalytic property of chitosan protected NiHCF@TNT was carried out on electrochemical oxidation of paracetamol and caffeine simultaneously. The proposed method may be applied for the electrochemical detection of paracetamol in drug samples. _______________________________________________________________________________

ZrO2 : Eu3+ NANOCRYSTAL FABRICATION AND ITS LUMINESCENCE PROPERTIES BY ION EXCHANGE METHOD

2010 ◽  
Vol 2010 (2) ◽  
pp. 179-183 ◽  
Author(s):  
Ren SHA ◽  
Xigui WANG ◽  
Xia LI
Keyword(s):  
Ion Exchange ◽  
Luminescence Properties ◽  
Exchange Method ◽  
Ion Exchange Method

Fabrication of Optical Non-Circular Lenses by a Laser Ion-Exchange Method and Its Analysis.

1993 ◽  
Vol 21 (9) ◽  
pp. 945-952
Author(s):  
Shigenori MATSUI
Keyword(s):  
Ion Exchange ◽  
Exchange Method ◽  
Its Analysis ◽  
Ion Exchange Method

A highly efficient Fe-Ni-S/NF hybrid electrode for promoting oxygen evolution performance

2021 ◽  
Author(s):  
YuYun Chen ◽  
Yang Xu ◽  
Shuai Niu ◽  
Jun Yan ◽  
Ye-Yu Wu ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Oxygen Evolution ◽  
Hierarchical Structure ◽  
Alkaline Solution ◽  
Exchange Method ◽  
Highly Efficient ◽  
Ion Exchange Method

In this study, a Fe-Ni-S/NF hybrid electrode with hierarchical structure was fabricated via a simple hydrothermal and ion exchange method, which exhibits remarkable OER performance in alkaline solution with an...

Unveiling defect-mediated carrier dynamics in few-layer MoS2 prepared by ion exchange method via ultrafast Vis-NIR-MIR spectroscopy

2020 ◽  
Vol 33 (5) ◽  
pp. 547-553
Author(s):  
Zhen Chi ◽  
Hui-hui Chen ◽  
Zhuo Chen ◽  
Hai-long Chen
Keyword(s):  
Ion Exchange ◽  
Carrier Dynamics ◽  
Exchange Method ◽  
Mir Spectroscopy ◽  
Ion Exchange Method

Preparation of BiOCl/Bi2S3 composites by simple ion exchange method for highly efficient photocatalytic reduction of Cr6+

2020 ◽  
Vol 506 ◽  
pp. 145000 ◽  
Author(s):  
Yun Lu ◽  
Jimei Song ◽  
Wenfang Li ◽  
Yali Pan ◽  
Huiyao Fang ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Photocatalytic Reduction ◽  
Exchange Method ◽  
Highly Efficient ◽  
Ion Exchange Method

A Complexo-Ion Exchange Method for the Sensitive and Selective Detection Of Iron (III) and Molybdenum(VI) on Antimony(V) Silicate Beads

1985 ◽  
Vol 18 (16) ◽  
pp. 2033-2042 ◽  
Author(s):  
K. G. Varshney ◽  
Sima Rani ◽  
S. Anwar ◽  
U. Sharma
Keyword(s):  
Ion Exchange ◽  
Selective Detection ◽  
Exchange Method ◽  
Ion Exchange Method

scholarly journals Characterization and Catalytic Behaviour of Co3(PO4)2–AlPO4 Catalysts

1998 ◽  
Vol 16 (4) ◽  
pp. 285-293 ◽  
Author(s):  
M.R. Mostafa ◽  
F.Sh. Ahmed
Keyword(s):  
Pore Radius ◽  
Surface Acidity ◽  
Total Pore Volume ◽  
Textural Properties ◽  
Acid Sites ◽  
Adsorption Of Nitrogen ◽  
Amorphous Structures ◽  
Ft Ir ◽  
Catalytic Behaviour ◽  
The Mean

Co3(PO4)2, AlPO4 and the binary system Co3(PO4)2-AlPO4 with different compositions were prepared by the coprecipitation method. The structural properties of these samples were determined using XRD, DTA and FT-IR techniques. The textural properties were determined from the adsorption of nitrogen at 77 K. The surface acidity was measured by a calorimetric titration method. The samples were tested as catalysts in the dehydration of ethanol and isopropanol using a pulse microcatalytic technique. The data obtained from XRD and FT-IR indicate the amorphous structures of the prepared catalysts. An increase in Co3(PO4)2 content led to a decrease in the surface area and in the total pore volume and an increase in the mean pore radius. The surface acidity of the catalyst depends on the chemical composition; the surface acidity increased with an increase in the AlPO4 content. The dehydration temperature and the distribution of acid sites are important parameters in determining the selectivity and activity of the catalyst.

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