NDLI: Starch as a green source for Fe$_{3}$O$_{4}$@carbon core–shell nanoparticles synthesis: a support for 12-tungstophosphoric acid, synthesis, characterization, and application as an efficient catalyst

Content Provider	Springer Nature Link
Author	Rafiee, Ezzat Khodayari, Maryam
Copyright Year	2015
Abstract	12-Tungstophosphoric acid (PW) immobilized on carbon-coated Fe$_{3}$O$_{4}$ nanoparticles (Fe$_{3}$O$_{4}$@C-PW) was prepared through a combination of hydrothermal and chemical co-precipitation. The intermediate carbon layer, which was produced from starch as a green material, protects the magnetic core and also improves the dispersion and catalytic activity of the nanoparticles. Characterization of this catalyst was investigated by high resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometry, and the acidic properties were studied by NH$_{3}$-temperature programmed desorption and potentiometric titration. The HRTEM image showed that the catalyst had a well-defined core–shell structure with an average particle size of 50 nm. The characterization data derived from FT-IR reveal that basic structure and geometry of the Keggin anion are preserved after synthesis of Fe$_{3}$O$_{4}$@C-PW. The as-prepared Fe$_{3}$O$_{4}$@C-PW was used as a nanocatalyst for the synthesis of various bis(indolyl)methanes and β-functionalized indoles in water. The catalyst can be recovered simply using an external magnetic field and reused several times without appreciable loss of its catalytic activity.
Starting Page	3523
Ending Page	3536
Page Count	14
File Format	PDF
ISSN	09226168
Journal	Research on Chemical Intermediates
Volume Number	42
Issue Number	4
e-ISSN	15685675
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-08-27
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Core–shell particle Hydrothermal Co-precipitation method Magnetically recoverable catalyst Heteropoly acid Catalysis Physical Chemistry Inorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Nano-Fe$_{3}$O$_{4}$ -encapsulated silica particles bearing sulfonic acid groups as a magnetically separable catalyst for the green and efficient synthesis of 14-aryl-14H-dibenzo[a,i]xanthene-8,13-dione derivatives

Polyphosphoric acid supported on Ni0.5Zn0.5Fe2O4 nanoparticles as a magnetically-recoverable green catalyst for the synthesis of pyranopyrazoles

Fe$^{2+}$ supported on hydroxyapatite-core–shell-γ-Fe$_{2}$O$_{3}$ nanoparticles: Efficient and recyclable green catalyst for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthene derivatives

Magnetic Fe$_{3}$O$_{4}$–BF$_{3}$: highly efficient Lewis acid catalyst for the synthesis of α-aminonitriles

Fabrication of MIL-100(Fe)@SiO$_{2}$@Fe$_{3}$O$_{4}$ core-shell microspheres as a magnetically recyclable solid acidic catalyst for the acetalization of benzaldehyde and glycol

Fe2+ Supported on Hydroxyapatite-core-shell-γ-fe2o3 Nanoparticles: as a Novel, Efficient and Magnetically-recoverable Catalyst for the Synthesis of Dihydropyrimidinones Derivatives

12-Tungstophosphoric acid supported on nano sized MCM-41 as an efficient and reusable solid acid catalyst for the three-component imino Diels–Alder reaction

Imidazole-functionalized magnetic Fe$_{3}$O$_{4}$ nanoparticles: an efficient, green, recyclable catalyst for one-pot Friedländer quinoline synthesis

Synthesis and characterization of tribenzyl ammonium-tribromide supported on magnetic Fe$_{3}$O$_{4}$ nanoparticles: a robust magnetically recoverable catalyst for the oxidative coupling of thiols and oxidation of sulfides

Starch as a green source for Fe$_{3}$O$_{4}$@carbon core–shell nanoparticles synthesis: a support for 12-tungstophosphoric acid, synthesis, characterization, and application as an efficient catalyst

Similar Documents

Nano-Fe$_{3}$O$_{4}$ -encapsulated silica particles bearing sulfonic acid groups as a magnetically separable catalyst for the green and efficient synthesis of 14-aryl-14H-dibenzo[a,i]xanthene-8,13-dione derivatives

Polyphosphoric acid supported on Ni0.5Zn0.5Fe2O4 nanoparticles as a magnetically-recoverable green catalyst for the synthesis of pyranopyrazoles

Fe$^{2+}$ supported on hydroxyapatite-core–shell-γ-Fe$_{2}$O$_{3}$ nanoparticles: Efficient and recyclable green catalyst for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthene derivatives

Magnetic Fe$_{3}$O$_{4}$–BF$_{3}$: highly efficient Lewis acid catalyst for the synthesis of α-aminonitriles

Fabrication of MIL-100(Fe)@SiO$_{2}$@Fe$_{3}$O$_{4}$ core-shell microspheres as a magnetically recyclable solid acidic catalyst for the acetalization of benzaldehyde and glycol

Fe2+ Supported on Hydroxyapatite-core-shell-γ-fe2o3 Nanoparticles: as a Novel, Efficient and Magnetically-recoverable Catalyst for the Synthesis of Dihydropyrimidinones Derivatives

12-Tungstophosphoric acid supported on nano sized MCM-41 as an efficient and reusable solid acid catalyst for the three-component imino Diels–Alder reaction

Imidazole-functionalized magnetic Fe$_{3}$O$_{4}$ nanoparticles: an efficient, green, recyclable catalyst for one-pot Friedländer quinoline synthesis

Synthesis and characterization of tribenzyl ammonium-tribromide supported on magnetic Fe$_{3}$O$_{4}$ nanoparticles: a robust magnetically recoverable catalyst for the oxidative coupling of thiols and oxidation of sulfides

Starch as a green source for Fe$_{3}$O$_{4}$@carbon core–shell nanoparticles synthesis: a support for 12-tungstophosphoric acid, synthesis, characterization, and application as an efficient catalyst