Study of Structural and Photocatalytic Activity of Cobalt Doped Nanocrystalline Gadolinium Aluminate via Facile Combustion Route

2019 ◽  
Vol 17 (11) ◽  
pp. 905-908
Author(s):  
P.K. Jisha ◽  
S.C. Prashantha ◽  
M.R. Anil Kumar ◽  
Ramachandra Naik ◽  
H. Nagabhushana
Keyword(s):  
Combustion Method ◽  
Solution Combustion ◽  
Solution Combustion Method ◽  
Structural Morphology ◽  
X Ray ◽  
The Past ◽  
The People ◽  
Transmission Electron ◽  
Dye Decolourisation ◽  
Combustion Route

Up converting (UC) nanoparticles have been a milestone for the people of optical world in the past decade because of their extraordinary properties. In this article, a novel cobalt doped nanocrystalline Gadolinium Aluminate (GdAlO3:Co2+) have been successfully synthesized by the solution combustion method. The structure of the samples were characterized using X-ray diffractometer (XRD) shows that transition metal (TM) doped nanoparticles have smaller crystalline size the structural morphology was studied using Transmission electron microscopy (TEM) which shows irregular shaped, highly dispersed and the size was found to be in the range of 15–25 nm. The result demonstrated that the synthesized material could be useful for dye decolourisation as a photocatalyst.

RAPID SYNTHESIS OF PURE AND Pr-DOPED TiCeO4 NANOPIGMENTS BY SOLUTION COMBUSTION METHOD

NANO ◽  
2011 ◽  
Vol 06 (02) ◽  
pp. 139-144 ◽  
Author(s):  
S. P. CHANDINI SAM ◽  
V. S. PRASAD ◽  
K. SUDARSANA KUMAR
Keyword(s):  
Combustion Method ◽  
Solution Combustion ◽  
Advanced Ceramics ◽  
Rapid Synthesis ◽  
Solution Combustion Method ◽  
Ecological Pigments ◽  
X Ray ◽  
Transmission Electron ◽  
Red Color ◽  
High Reflectance

Combustion synthesis has emerged as a facile and economically viable technique for the preparation of advanced ceramics, catalysts and nanomaterials. This paper is the report of the investigations carried out on the synthesis of titania–rare-earth mixed oxide pigments: TiCe 1-x Pr x O 4-δ by the solution combustion method and their characterization by X-ray powder diffraction, transmission electron microscopy, reflectance spectral data, thermal analysis and surface area measurements. The synthesized nanopigments exhibit yellow to brick red color with the increase of praseodymium content. The dominant reflectance of these pigments lies above a wavelength of 600 nm. These pigments are found to be promising candidates as ecological pigments because of their high reflectance, lightness and intense coloration.

EFFECT OF STRONTIUM DOPING ON NANOSTRUCTURE AND CHROMATICITY OF Y2O3:Eu COMPOUNDS

2011 ◽  
Vol 25 (22) ◽  
pp. 2949-2956 ◽  
Author(s):  
ALI MOHAMMADI ◽  
YADOLAH GANJKHANLOU ◽  
MAHMOOD KAZEMZAD ◽  
ABDOLMAJID BAYANDORI MOGHADDAM ◽  
FEREIDOUN ALIKHANI HESSARI ◽  
...  
Keyword(s):  
Emission Spectra ◽  
Photo Luminescence ◽  
Combustion Method ◽  
Urea Solution ◽  
Photoluminescence Intensity ◽  
X Ray Diffraction ◽  
Solution Combustion ◽  
Solution Combustion Method ◽  
X Ray ◽  
Transmission Electron

In this work, various nano-sized samples of Y 2 O 3, Y 2 O 3 :Eu and Y 2 O 3 :Eu , Sr were prepared by urea solution combustion method. Then the resultant nanopowders were investigated by means of X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FTIR) and photo-luminescence emission spectra. Furthermore, the CIE color coordinate of samples were calculated from photoluminescence emission spectra. Results showed that by doping of strontium, the photoluminescence intensity and chromaticity of Y 2 O 3: Eu phosphor was enhanced while crystallite size was decreased.

Influence of Fuel and Condition in Combustion Synthesis on Properties of Copper (II) Oxide Nanoparticle

2013 ◽  
Vol 829 ◽  
pp. 152-156 ◽  
Author(s):  
Hamed Sadabadi ◽  
Adeleh Aftabtalab ◽  
Shirzad Zafarian ◽  
Shilpa Chakra ◽  
K. Venkateswara Rao ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Oxide Particle ◽  
Combustion Method ◽  
Copper Oxide Nanoparticles ◽  
Solution Combustion ◽  
Solution Combustion Method ◽  
Edax Analysis ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Oxide Nanoparticle

Copper oxide nanoparticles have been received attraction due to their unique properties and potential future applications. In present work nanostructure Copper (II) oxide (CuO) spherical nanoparticle synthesized by solution combustion method and the influence of different fuel and condition on the properties of CuO particle was investigated. Crystalline phase and size indicated by applying XRD and particle size distribution studied further using DLS. Scanning electron microscopy (SEM) was used for morphological study and EDAX analysis shows composition of CuO particles. Nanostructure of copper (II) oxide particle studied further by Transmission electron microscopy (TEM) and selected area electron diffraction (SAED) applied for detail study on crystalline structure of particles.

scholarly journals Improvement of the Photocatalytic Activity of ZnO/Burkeite Heterostructure Prepared by Combustion Method

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 817 ◽  
Author(s):  
A. Luna-Flores ◽  
M.A. Morales ◽  
R. Agustín-Serrano ◽  
R. Portillo ◽  
J.A. Luna-López ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Combustion Method ◽  
X Ray Diffraction ◽  
Solution Combustion ◽  
Solution Combustion Method ◽  
X Ray ◽  
Sem Image ◽  
Particle Aggregates ◽  
One Step ◽  
Ph Dependent

In this work, a novel route is discussed to produce in one step ZnO/Burkeite powders by the modified solution combustion method. The ZnO particles enhance the photocatalytic activity in the degradation of Rhodamine B, in which Burkeite mineral acts as a support due to the pH-dependent morphology of the particle aggregates of the as-synthesized powders. The X-ray diffraction (XRD) characterization shows the presence of a heterostructure: ZnO/Burkeite. The Scanning Electron Microscopy (SEM) image shows a morphological dependence with the pH of the solution used for the synthesis. The results show that the system with the highest degradation (92.4%) corresponds to the case in which ZnO/Burkeite heterostructure was synthesized with a pH 11.

scholarly journals Catalytic oxidation of CO over CuO/CeO2 nanocomposites synthesized via solution combustion method: effect of fuels

2020 ◽  
Vol 59 (1) ◽  
pp. 131-143 ◽  
Author(s):  
Thanh Son Cam ◽  
Tatyana Alekseevna Vishnievskaia ◽  
Vadim Igorevich Popkov
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Combustion Method ◽  
X Ray Diffraction ◽  
Solution Combustion ◽  
Solution Combustion Method ◽  
X Ray ◽  
Low Temperature Co Oxidation ◽  
Temperature Programmed ◽  
Adsorption Desorption

AbstractA series of CuO/CeO2 catalysts were successfully synthesized via solution combustion method (SCS) using different fuels and tested for CO oxidation. The catalysts were characterized by energy-dispersive X-ray analysis (EDXA), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), N2 adsorption-desorption isotherms and H2 temperature-programmed reduction (H2-TPR). It was found that the used fuels strongly affected the characterization and the low-temperature reduction behavior of CuO/CeO2 catalysts. The CuO/CeO2-urea catalyst exhibited higher catalytic activity toward CO oxidation (t50=120∘C, t100=159∘C) than the 5 other synthesized catalysts. In addition, the CuO/CeO2-urea catalyst displayed high stability for CO oxidation during five cycles and water resistance. The enhanced catalytic CO oxidation of the synthesized samples can be attributed by a combination of factors, such as smaller crystallite size, higher specific surface area, larger amount of amorphous copper(II) oxide, more mesoporous and uniform spherical-like structure. These findings are worth considering in order to continue the study of the CuO/CeO2 catalyst with low-temperature CO oxidation.

scholarly journals Green Synthesis of Ni-Cu-Zn Based Nanosized Metal Oxides for Photocatalytic and Sensor Applications

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1467
Author(s):  
Mir Waqas Alam ◽  
Muhammad Aamir ◽  
Mohd Farhan ◽  
Maryam Albuhulayqah ◽  
Mohamad M. Ahmad ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Combustion Method ◽  
X Ray Diffraction ◽  
Solution Combustion ◽  
Solution Combustion Method ◽  
Visible Absorption ◽  
X Ray ◽  
Sensor Applications ◽  
Synthesized Materials

The preparation, characterization, and application of Nickel oxide (NiO)–Copper oxide (CuO)–Zinc oxide (ZnO) transition nanometal oxides have significantly enhanced their tunable properties for superior multifunctional performances compared with well-known metal oxides. NiO–CuO–ZnO nano transition metal oxides were synthesized by a simple eco-friendly solution combustion method. X-ray diffraction studies revealed distinct phases such as monoclinic, cubic, and hexagonal wurtzite for CuO, NiO, and ZnO, respectively, with NiO having the highest composition. The particle sizes were found to be in the range between 25 and 60 nm, as determined by powder X-ray diffraction. The energy bandgap values were found to be 1.63, 3.4, and 4.2 eV for CuO, ZnO, and NiO, respectively. All metal oxides exhibited a moderate degradation efficiency for AR88 dye. The results of ultraviolet–visible absorption spectra helped identify the bandgap of metal oxides and a suitable wavelength for photocatalytic irradiation. Finally, we concluded that the electrochemical studies revealed that the synthesized materials are well suitable for sensor applications.

Photoluminescence, Synthesis,Characterization of MgO Nanophosphors Influenced by Dy3+ Ions Concentrations

2021 ◽  
Vol 30 (1) ◽  
pp. 130-138
Author(s):  
Gitanjali Sahu ◽  
Anubha S. Gour
Keyword(s):  
Synthesis Method ◽  
Emission Spectra ◽  
Solution Combustion Synthesis ◽  
Combustion Method ◽  
Xrd Analysis ◽  
Magnesium Nitrate ◽  
Solution Combustion ◽  
X Ray ◽  
Transmission Electron ◽  
Photoluminescence Studies

The present paper reports the synthesis, characterization and photoluminescence (PL) studies of MgO:Dy3+ nanoparticles. In this work, MgO:Dy3+ nanophosphors were prepared through solution combustion synthesis method using magnesium nitrate as oxidizer and urea as a fuel. The as-obtained MgO:Dy3+ nanomaterials were characterized by powder X-ray diffraction (XRD), energy-dispersive X-ray (EDX) analysis, Fourier transformation infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), high resolution transmission electron microscope (HRTEM), photoluminescence (PL) spectra and afterglow curve analysis. The cubic structure of the MgO phosphors is confrmed by XRD analysis and crystalline size calculated by Scherer’s formula using XRD data shows the nanocrystalline nature of the phosphor. No phase change is observed with increasing concentrations of Dy3+ ions. The surface morphology of the prepared phosphors is determined by SEM, which shows a sphere-like structure and good connectivity of the grains. The confrmation of the nanocrystalline phosphors is examined by HRTEM analysis.The photoluminescence studies revealed that the emission spectra of the prepared phosphors shows the broad emission centered at 435 nm and 480 nm due to the transition arises from the 4f→5d defect band transition of Dy3+ ions. The afterglow decay characteristics of different as synthesized MgO:Dy3+ nanophosphors are conceptually described. This is the first reported that on the synthesis of nanocrystalline MgO:Dy3+ materials by combustion method using urea as a fuel.

scholarly journals Preparation of NiFe2O4 Nanoparticles by Solution Combustion Method as Photocatalyst of Congo red

2021 ◽  
Vol 16 (3) ◽  
pp. 481-490
Author(s):  
Poedji Loekitowati Hariani ◽  
Muhammad Said ◽  
Addy Rachmat ◽  
Fahma Riyanti ◽  
Handayani Citra Pratiwi ◽  
...  
Keyword(s):  
Congo Red ◽  
Combustion Method ◽  
H2o2 Concentration ◽  
Solution Combustion ◽  
Solution Ph ◽  
Solution Combustion Method ◽  
X Ray ◽  
Congo Red Dye ◽  
Nife2o4 Nanoparticles ◽  
Red Dye

NiFe2O4 nanoparticles had been successfully synthesized by solution combustion method using urea fuel (organic precursor). The synthesized NiFe2O4 were characterized by X-ray diffraction (XRD), Scanning electron microscopy-Electron Dispersive X-ray Spectroscopy (SEM-EDs), Transmission Electron Microscopy (TEM), Fourier Transform Infra-Red (FTIR), Vibrating Sample Magnetometer (VSM), UV-Vis Diffuse Reflectance Spectroscopy (UV-Vis DRS), and Point of Zero Charge (pHpzc). NiFe2O4 nanoparticles irradiated with visible light were employed to degrade Congo red dye with the following variable: solution pH (3–8), H2O2 concentration (0.5–3 mM), and Congo red concentration (100–600 mg/L). XRD analysis results showed that the NiFe2O4 nanoparticles had a cubic spinel structure. The particle sizes are in the range of 10–40 nm. The magnetic properties of NiFe2O4 nanoparticles determined using VSM showed a magnetization saturation value of 47.32 emu/g. UV-Vis DRS analysis indicated that NiFe2O4 nanoparticles had an optical band gap of 1.97 eV. The success of synthesis was also proven by the EDS analysis results, which showed that the synthesized NiFe2O4 nanoparticles composed of Ni, Fe, and O elements. The removal efficiency of Congo red dye was 96.80% at the following optimum conditions: solution pH of 5.0, H2O2 concentration of 2 mM, Congo red dye concentration of 100 mg/L, and contact time of 60 min. The study of the photodegradation kinetics follows a pseudo-first order reaction with a rate constant value of 0.0853 min−1. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 

X-ray powder diffraction of RE6UO12 (RE=Eu, Gd, and Dy)

2001 ◽  
Vol 16 (4) ◽  
pp. 220-223 ◽  
Author(s):  
Hrudananda Jena ◽  
R. Asuvathraman ◽  
M. V. Krishnaiah ◽  
K. V. Govindan Kutty
Keyword(s):  
Combustion Method ◽  
Rhombohedral Structure ◽  
X Ray Diffraction ◽  
Unit Cell Parameters ◽  
Solution Combustion ◽  
Rare Earth Ion ◽  
Solution Combustion Method ◽  
X Ray ◽  
Cell Parameters ◽  
Diffraction Patterns

Powder X-ray diffraction data are reported for RE6UO12 (RE=Eu, Gd, and Dy). The powders were prepared by a solution combustion method using urea as fuel. All compositions exhibit a rhombohedral structure with hexagonal unit cell parameters of a=1.012 67 (9) nm, c=0.9601 (1) nm for Eu6UO12; a=1.008 78 (6) nm, c=0.954 24 (7) nm for Gd6UO12; and a=0.998 06 (7) nm, c=0.944 03 (8) nm for Dy6UO12. The diffraction patterns of all the compounds are indexed on the R3¯ space group with Z=3. The a and c values decrease with increasing atomic number of the rare earth ion.

Physical, Optical and Photochemical Properties of CeO2 Nanoparticles Synthesized by Solution Combustion Method

2017 ◽  
Vol 6 (1) ◽  
pp. 41-47 ◽  
Author(s):  
R. Bakkiyaraj ◽  
M. Balakrishnan
Keyword(s):  
Visible Region ◽  
Blue Shift ◽  
Combustion Method ◽  
Broad Emission Band ◽  
X Ray Diffraction ◽  
Solution Combustion ◽  
Solution Combustion Method ◽  
Transmission Electron ◽  
Average Grain Size ◽  
Photochemical Properties

Cerium oxide (CeO2) nanoparticles were successfully synthesized by solution combustion method using cerium nitrate and urea. The prepared sample was characterized by X-Ray Diffraction (XRD), Fourier Transform Infra-red Spectroscopy (FTIR), Ultraviolet (UV) and Photoluminescence (PL), Field Emission Scanning Electron Microscopy (FESEM), High Resolution Transmission Electron Microscope (HRTEM), Thermogravimetric-Differential Thermal Analysis (TG-DTA) and photocatalytic measurements. The XRD results confirmed that the synthesized nanocrystalline CeO2 samples have cubic structure with average grain size about 12, 18 and 26 nm (as prepared at 120 °C, sintered at 300 °C and sintered at 600 °C respectively). The HRTEM results confirmed that the synthesized nanoparticles have good polycrystalline nature. In the PL spectra, a strong and broad emission band was observed at 425 nm due to the presence of blue shift in the visible region. The TEM results revealed that the synthesized CeO2 nanoparticles were sphere shaped particles of size in the range 10–15 nm. The degradation of methylene blue catalysed by CeO2 nanoparticles was studied under visible light irradiation. The maximum degradation was obtained with 1.0 g/L CeO2 at pH 11 within 5 hours.

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