Synthesis of Fe–Ni–Ce trimetallic catalyst nanoparticles via impregnation and co-precipitation and their application to dye degradation

In this study, trimetallic catalysts were prepared via the co-precipitation and impregnation methods. In order to investigate the effect of impregnation on the catalytic activity and crystallite size, a trimetallic catalyst, Fe–Ni–Ce, was prepared through the co-precipitation method in one set of experiments, and cerium was impregnated with the Ni–Fe mixture in the final stage of the preparation in another set. Fourier transform infrared spectroscopy was employed to confirm the formation of trimetallic catalysts and the success of the impregnation method. The Brunauer–Emmett–Teller nitrogen adsorption isotherm exhibits a high specific surface area (approximately 39 m

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Preparation and Characterization of the Typical Pt-NSR Catalyst

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.412.365 ◽

2011 ◽

Vol 412 ◽

pp. 365-369

Author(s):

Yuan Feng Huang ◽

Wei Jun Zhang ◽

Li Shen ◽

Jin Hu ◽

Zhuo Heng Li ◽

...

Keyword(s):

Specific Surface ◽

Surface Area ◽

Specific Surface Area ◽

Performance Testing ◽

High Specific Surface Area ◽

Impregnation Method ◽

Temperature Programmed Reduction ◽

Temperature Programmed ◽

Co Precipitation

A series of Ba-Al-O NSR supports and Pt/Ba-Al-O NSR catalysts are prepared by co-precipitation and impregnation method in this work. The catalyst and the support are characterized by XRD, SEM, SBET performance testing. The structure and texture of the supports is observed and discussed. The results of SBET indicate that the supports possess relative high specific surface area (94~110 m2/g). Temperature programmed reduction is characterized by means of H2-TPR.

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Preparation of Chitosan - Hydroxyapatite Nanocomposites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.284-286.1760 ◽

2011 ◽

Vol 284-286 ◽

pp. 1760-1763

Author(s):

Jing Xian Zhang ◽

Dong Liang Jiang ◽

Qing Ling Lin ◽

Zhong Ming Chen ◽

Zheng Ren Huang

Keyword(s):

Mechanical Properties ◽

Fourier Transform ◽

Phase Composition ◽

Fourier Transform Infrared ◽

Chitosan Solution ◽

Precipitation Method ◽

Solution Ph ◽

Cylindrical Form ◽

Infrared Spectrometer ◽

Co Precipitation

Chitosan/Hydroxyapatite composites with a homogeneous nanostructure have been prepared by a co-precipitation method. Initially, a chitosan solution was prepared and mixed with the (NH4)2HPO4 solution. After homogenizing, the obtained chitosan/ (NH4)2HPO4 solution was gradually dropped into the Ca (NO3)2.4H2O solution under stirring. The solution pH was adjusted to 9 using NH3.H2O. The precipitate was compressed into a cylindrical form followed by post treatment. The microstructure, phase composition and mechanical properties of the resulting chitosan-HAp composites were characterized. In the presence of chitosan, HAp crystallites were found to be well aligned along the c-axes in the respective aggregates. Fourier transform infrared spectrometer results indicated that an intermolecular bridging complexes might have been developed between the chitosan and HAp. The compact composites obtained were mechanically flexible, the highest strength was found to be 38.4 MPa for chitosan/HAp samples with a 20 wt% of chitosan.

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Nanoscale zero-valent iron incorporated with nanomagnetic diatomite for catalytic degradation of methylene blue in heterogeneous Fenton system

Water Science & Technology ◽

10.2166/wst.2016.134 ◽

2016 ◽

Vol 73 (11) ◽

pp. 2815-2823 ◽

Cited By ~ 3

Author(s):

Yiming Zha ◽

Ziqing Zhou ◽

Haibo He ◽

Tianlin Wang ◽

Liqiang Luo

Keyword(s):

Methylene Blue ◽

Chemical Reduction ◽

Nitrogen Adsorption ◽

Catalytic Degradation ◽

Zero Valent Iron ◽

Precipitation Method ◽

Heterogeneous Fenton ◽

Nanoscale Zero Valent Iron ◽

Co Precipitation ◽

Fenton System

Nanoscale zero-valent iron (nZVI) incorporated with nanomagnetic diatomite (DE) composite material was prepared for catalytic degradation of methylene blue (MB) in heterogeneous Fenton system. The material was constructed by two facile steps: Fe3O4 magnetic nanoparticles were supported on DE by chemical co-precipitation method, after which nZVI was incorporated into magnetic DE by liquid-phase chemical reduction strategy. The as-prepared catalyst was characterized by scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, magnetic properties measurement and nitrogen adsorption–desorption isotherm measurement. The novel nZVI@Fe3O4-diatomite nanocomposites showed a distinct catalytic activity and a desirable effect for degradation of MB. MB could be completely decolorized within 8 min and the removal efficiency of total organic carbon could reach to 90% after reaction for 1 h.

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Fabrication and Characterization of Polysorbate/Ironmolybdophosphate Nanocomposite: Ion Exchange Properties and pH-responsive Drug Carrier System for Methylcobalamin

Current Analytical Chemistry ◽

10.2174/1573411014666180727144746 ◽

2020 ◽

Vol 16 (2) ◽

pp. 138-148

Author(s):

Gaurav Sharma ◽

Amit Kumar ◽

Inamuddin ◽

Mansi Sood ◽

Abdullah M. Asiri

Keyword(s):

Drug Delivery ◽

Fourier Transform ◽

Ion Exchange ◽

Drug Release ◽

Sodium Nitrate ◽

Fourier Transform Infrared ◽

Exchange Capacity ◽

Precipitation Method ◽

Ion Exchange Capacity ◽

Co Precipitation

Background: Nanocomposites are of great interest due to their competency to show multifunctional properties. They have been recently given much attention due to their credibility to offer the synergistic feature of organic material with those of inorganic constituents. Different types of nanocomposites have been prepared to date and are being used for different applications. The delivery of drugs in the human body at a particular site was one of the major problems in the medicinal field. The nanocomposite formulations can be used to provide controlled release and they can be combined with ligands for targeted drug delivery. Applications of the nanocomposites as ion exchangers are also increasing at a faster rate. Due to this, they help in the softening of the water. They can also be easily recharged by washing them with a solution containing a high concentration of sodium ions. In the present paper, we have worked on the synthesis and applications of the polysorbate/ironmolybdophosphate (PS/FMP) nanocomposite. Methods: Polysorbate/ironmolybdophosphate (PS/FMPS) was synthesized by co-precipitation method in the presence of polysorbate. The material was well characterized using X-ray diffraction (XRD) analysis, Fourier transform infrared spectroscopy, (FTIR) scanning transmission microscopy (SEM), and transmission electron microscopy (TEM). Physicochemical properties of material were studied in detail. Drug delivery behavior of polysorbate/ironmolybdophosphate was investigated by using methylcobalamin as a test drug. Results: The polysorbate/ironmolybdophosphate nanocomposite show enhanced Na+ ion exchange capacity of 2.1 meq/g. It has been revealed that PS/FMP nanocomposite was thermally stable as it retained the ion exchange capacity of 40.4 % at 400°C. An optimum concentration of sodium nitrate (eluent) was found to be 1.0 M for the complete removal of H+ ions from the PS/FMP column. The optimum volume of sodium nitrate (eluent) was found to be 230 mL. The FTIR spectra showed the changes in intensities of characteristic peaks in PS/FMP and in drug loaded on PS/FMP nanocomposite. The characteristic peak at 1043-1061 cm-1 was observed for ionic phosphate stretching, 560-567 cm-1 for iron group and 959 cm-1 due to molybdate present in the material. The additional peak at 3390 cm-1 and 1711 cm-1 were due to -OH and C=O stretching due to the presence of these groups in the structure of polysorbate. The peak present at 430 cm-1 might be due to the presence of Co-O stretching of methylcobalamin. The XRD results confirmed the semicrystalline structure of FMP and PS/FMP. Scanning electron micrographs results revealed the beaded surface of FMP changes to fibrous surface in case of PS/FMP nanocomposite. The TEM images indicate the appearance of smooth surfactant layer on the surface of FMP. The size of the nanocomposite is between 10- 70 nm. The drug loading efficiency and encapsulation efficiency were found to be 35.2%. and 60.4%, respectively. The cumulative drug release of methylcobalamin was studied for the PS/FMP nanocomposite. The order of drug release was found to be pH 9.4 (54.6%) > pH 7.4 (46.4%) > saline (pH 5.7) (36.2%) > pH 2.2 (33.9%). The release at pH 9.4 was higher. As the pH of medium changes from acidic to basic i.e. 2.2 - 9.4, there is an appreciable increase in drug release from the PS/FMP nanocomposite due to the presence of more OH- ions resulting in neutralization of cationic nanocomposite and thus increasing the rate of drug release by ion exchange process and matrix deterioration. : The novel nanocomposite PS/FMP has been synthesized by a simple co-precipitation method. The increase in Na+ ion exchange capacity for nanocomposite is due to the binding of organic part (Polysorbate) with inorganic ironmolybdophosphate. The physiochemical properties of PS/FMP were found to be superior. Fourier transform infrared spectra of PS/FMP and drug loaded PS/FMP confirmed the formation of materials. The SEM results indicated the surface of synthesized FMP is bead-like appearance whereas the beaded surface of FMP changes to fibrous surface on the addition of polysorbate thus indicated the fabrication of nanocomposite. The cumulative drug release of methylcobalamin was studied and the order of drug release was found to be pH 9.4 > pH 7.4 > saline (pH 5.7) > pH 2.2. Thus PS/FMP is a promising multifunctional nanocomposite.

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Promoted dispersion and uniformity of active species on Fe–Ce–Al catalysts for efficient NO abatement

RSC Advances ◽

10.1039/c9ra06875a ◽

2019 ◽

Vol 9 (61) ◽

pp. 35751-35759 ◽

Cited By ~ 4

Author(s):

Xiaobo Wang ◽

Caojian Jiang ◽

Jia Wang ◽

Keting Gui ◽

Hywel R. Thomas

Keyword(s):

Active Species ◽

Precipitation Method ◽

Impregnation Method ◽

Effective Removal ◽

Mixing Method ◽

No Abatement ◽

Co Precipitation

Fe–Ce–Al catalysts were synthesized by the co-precipitation method (labeled as Fe–Ce–Al–P), co-impregnation method (Fe–Ce–Al–I), and direct mixing method (Fe–Ce–Al–M), respectively, and used for effective removal of NO.

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Study on Cu-Based Catalysts for Synthesis of Indole

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.295-297.668 ◽

2011 ◽

Vol 295-297 ◽

pp. 668-671 ◽

Cited By ~ 3

Author(s):

Jun De Xing ◽

Xiao Fei Jia

Keyword(s):

Grain Size ◽

Ethylene Glycol ◽

Specific Surface ◽

Surface Area ◽

Specific Surface Area ◽

Precipitation Method ◽

Impregnation Method ◽

Co Precipitation

A series of Cu-based catalysts for the synthesis of indole by the reaction of aniline and ethylene glycol were prepared and characterized by ICP-AES and XRD. The results indicated that the activity and stability of Cu/SiO2 catalyst was increased after adding Zn, Mn, Cr and Fe promoters. Mn promoter was favorable for the dispersion of Cu, Zn, Cr, Fe and enlarged the specific surface area of catalysts. It could be seen that the catalysts prepared by impregnation method had better stability and higher activity than the catalysts prepared by co-precipitation method. The catalysts with small grain size of Cu had higher activity than those with big grain size. Some catalysts showed excellent performances in this reaction.

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The Effects of SiO2 and CeO2 Addition on the Performances of MnOx/TiO2 Catalysts

Australian Journal of Chemistry ◽

10.1071/ch16060 ◽

2016 ◽

Vol 69 (10) ◽

pp. 1180

Author(s):

Juhua Luo ◽

Hongkai Mao ◽

Xu Wang ◽

Wei Yao

Keyword(s):

Low Temperature ◽

Pore Diameter ◽

Catalytic Reduction ◽

Pure Tio2 ◽

Precipitation Method ◽

Impregnation Method ◽

Average Pore ◽

Reduction Of No ◽

No Conversion ◽

Co Precipitation

A TiO2-SiO2 mixed oxide was obtained by a co-precipitation method. MnOx-CeO2/TiO2-SiO2 were prepared by an impregnation method and their activity towards the selective catalytic reduction of NO with NH3 at low temperature were evaluated. Compared with pure TiO2, TiO2-SiO2 exhibited an evidently larger surface area and pore volume, and a smaller average pore diameter with narrow distribution. The NO conversion of the MnOx/TiO2-SiO2 catalyst could be improved by the addition of an appropriate amount of CeO2 in the temperature range of 100–180°C. MnOx-CeO2/TiO2-SiO2 with 10 wt-% CeO2 showed the highest activity with 96 % NO conversion at 180°C.

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A Comprehensive Study on the Effect of ZnO and ZnAl2O4 Nanoparticles on the Mechanical Properties of Epoxy Coating: Tensile and Hardness

Modern Applied Science ◽

10.5539/mas.v15n5p45 ◽

2021 ◽

Vol 15 (5) ◽

pp. 45

Author(s):

Abeer Shmait ◽

Nour El Ghouch ◽

J. Al Boukhari ◽

A. M. Abdel-Gaber ◽

R. Awad

Keyword(s):

Electron Microscopy ◽

Mechanical Properties ◽

Fourier Transform ◽

Infrared Spectroscopy ◽

Fourier Transform Infrared Spectroscopy ◽

Fourier Transform Infrared ◽

Tensile Tests ◽

Precipitation Method ◽

Zno Nps ◽

Co Precipitation

ZnO and ZnAl2O4 nanoparticles (NPs) were successfully prepared by the co-precipitation method and characterized by x-ray powder diffraction, transmission electron microscopy, and Fourier transform infrared spectroscopy. The prepared NPs were incorporated into epoxy (EP) coating with mass ratios 200  800 mg/kg of ZnO NPs/EP and ZnAl2O4 NPs /EP. The prepared coatings were characterized by scanning electron microscopy and Fourier transform infrared spectroscopy, and their mechanical properties were investigated, at room temperature, after 5, 10, 15, and 20 days of preparation. Tensile tests showed an improvement in the tensile properties, with the best improvement in ultimate tensile strength (93.2%) for 800 mg/kg ZnAl2O4 NPs/EP coating after 15 days of preparation. The ZnO NPs/EP and ZnAl2O4 NPs/EP coatings exhibited noticeable sensitivity to the stretching rate. Vickers microhardness (Hv) investigations showed normal indentation size effect behavior for all the samples. The best improvement in Hv was attained after 5 days of preparation, for all coatings, with the best improvement (9.15%) for 700 mg/kg ZnO NPs/EP.

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Synthesis and characterization of silver doped magnetic-nanoclay montmorillonite/iron oxide/silver nanocomposite for environmental applications throught effective dye degradation

10.21203/rs.3.rs-296035/v1 ◽

2021 ◽

Author(s):

Musa Kazim Acar ◽

Türkan Altun ◽

Ilkay Hilal Gubbuk

Keyword(s):

Iron Oxide ◽

Dye Degradation ◽

Chemical Reduction ◽

Precipitation Method ◽

Reaction Conditions ◽

First Order Kinetics ◽

Optimum Reaction ◽

Silver Nanocomposite ◽

Co Precipitation

Abstract Magnetic-nanoclay montmorillonite/iron oxide (MMT/Fe 3 O 4 ) nanocomposite was prepared by co-precipitation method and montmorillonite/iron oxide/silver (MMT/Fe 3 O 4 /Ag) nanocomposite was synthesized, called as chemical reduction method, by reduction of silver nitrate (AgNO 3 ) salt with sodium borohydride (NaBH 4 ) as reducing agent. These nanocomposites were characterized by Branuer-Emmet-Teller Surface Area and Porosity Dimension (BET), X-Ray Diffractometer (XRD), Fourier Transform Infrared Spectrum (FTIR), Scanning Electron Microscope (SEM) and Vibrating Sample Magnetometer (VSM). Subsequently, MMT/Fe 3 O 4 /Ag was used in degradation of Rhodamine B (RhB) in the presence of NaBH 4 to evaluate catalytic activity of its and consequences were monitored using UV-Visible Spektrofotometer (UV-Vis). Moreover, various parameters including pH, catalyst dosage, initial dye concentration and amount of NaBH 4 were investigated for optimum reaction conditions. The reduction reactions followed pseudo-first order kinetics and complete degradation of RhB were achieved in 8 minutes using MMT/Fe 3 O 4 /Ag as catalysts while degradation of %46 of RhB were achieved in 60 minutes using MMT/Fe 3 O 4 .

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