Cu-Doped SnO2 Nanoparticles: Synthesis and Properties

2019 ◽  
Vol 19 (11) ◽  
pp. 7139-7148 ◽  
Author(s):  
Suresh Sagadevan ◽  
Zaira Zaman Chowdhury ◽  
Mohd. Rafie Bin Johan ◽  
Fauziah Abdul Aziz ◽  
L. Selva Roselin ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Band Gap ◽  
Chemical Constituents ◽  
Sno2 Nanoparticles ◽  
Impedance Analysis ◽  
Band Gap Energy ◽  
Gap Energy ◽  
Electrical And Magnetic Properties ◽  
Different Temperatures ◽  
Co Precipitation

In this work, a simple, co-precipitation technique was used to prepare un-doped, pure tin oxide (SnO2). As synthesized SnO2 nanoparticles were doped with Cu2+ ions. Detailed characterization was carried out to observe the crystalline phase, morphological features and chemical constituents with opto-electrical and magnetic properties of the synthesized nanoparticles (NPs). X-ray diffraction analysis showed the existence of crystalline, tetragonal structure of SnO2. Both the sample synthesized here showed different crystalline morphology. The band gap energy (Eg) of the synthesized sample was estimated and it was found to decrease from 3.60 to 3.26 eV. The band gap energy reduced due to increase in Cu2+ dopant amount inside the SnO2 lattice. Optical properties were analyzed using absorption spectra and Photoluminescence (PL) spectra. It was observed that Cu2+ ions incorporated SnO2 NPs exhibited more degradation efficiencies for Rhodamine B (RhB) dye compared to un-doped sample under UV-Visible irradiation. The dielectric characteristics of un-doped, pure and Cu2+ incorporated SnO2 nanoparticles were studied at different frequency region under different temperatures. The ac conductivity and impedance analysis of pure and Cu2+ incorporated SnO2 nanoparticles was also studied. The magnetic properties of the synthesized samples were analysed. Both the sample showed ferromagnetic properties. The research indicated that the Cu2+ ions doping can make the sample a promising candidate for using in the field of optoelectronics, magneto electronics, and microwave devices.

Structural, optical, electrical and magnetic properties of Cu and Ni doped SnO2 nanoparticles prepared via Co-precipitation approach

2020 ◽  
Vol 588 ◽  
pp. 412169 ◽  
Author(s):  
J. Divya ◽  
A. Pramothkumar ◽  
S. Joshua Gnanamuthu ◽  
D.C. Bernice Victoria ◽  
P.C. Jobe prabakar
Keyword(s):  
Magnetic Properties ◽  
Sno2 Nanoparticles ◽  
Electrical And Magnetic Properties ◽  
Co Precipitation

New complexes constructed from in situ nitration of (1H-tetrazol-5-yl)phenol: synthesis, structures and properties

CrystEngComm ◽  
2017 ◽  
Vol 19 (45) ◽  
pp. 6758-6777 ◽  
Author(s):  
Ceng-Ceng Du ◽  
Xin-Fang Wang ◽  
Sheng-Bin Zhou ◽  
Duo-Zhi Wang ◽  
Dianzeng Jia
Keyword(s):  
Magnetic Properties ◽  
Solid State ◽  
Band Gap ◽  
Luminescent Properties ◽  
Band Gap Energy ◽  
Gap Energy ◽  
Phenol Synthesis ◽  
Structures And Properties

New complexes based on three precursors via in situ nitration have been prepared. Moreover, the solid state UV-vis spectra and band gap energy of those complexes were investigated, and the luminescent properties (1–3, 7 and 8) and magnetic properties (3–6 and 9) were also discussed.

scholarly journals Synthesis, characterization and photocatalytic activity of Zn2+, Mn2+ and Co2+ doped SnO2 nanoparticles

2019 ◽  
Vol 9 (5) ◽  
pp. 4199-4204 ◽  
Author(s):  
Oeindrila Mukhopadhyay ◽  
Soumita Dhole ◽  
Badal Kumar Mandal ◽  
Fazlur-Rahman Nawaz Khan ◽  
Yong-Chien Ling
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Transition Metal ◽  
Band Gap ◽  
Sno2 Nanoparticles ◽  
Transition Metal Ions ◽  
Band Gap Energy ◽  
Blue Dye ◽  
Gap Energy ◽  
Sno2 Nps

Nanomaterials with many improved properties have been used in versatile applications. Herein we have synthesized SnO2 NPs doped with transition metal ions such as Zn2+, Mn2+ and Co2+ through a facile and inexpensive hydrothermal approach. The synthesized nanomaterials were characterized by XRD, FT-IR, SEM and UV-Vis analysis. The optical properties of the NPs were characterized by using UV–vis and photoluminescence spectroscopy (PLS). Their photocatalytic performances were investigated by degrading methylene blue (MB) dye with UV irradiation. Transition metal doping to SnO2 NPs improved the photocatalytic activity to degradation of methylene blue dye due to tuning of band gap energy i.e. lowering of band gap energy compared to undoped SnO2 NPs. The results suggest that the synthesized NPs could be used efficiently for remediation/degradation of environmentally hazardous dyes from waste water or environmental cleanup.

scholarly journals Testing the Efficacy of the Synthesis of Iron Antimony Sulfide Powders from Single Source Precursors

Inorganics ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 61
Author(s):  
Fadiyah Makin ◽  
Dalal Alzahrani ◽  
Firoz Alam ◽  
Floriana Tuna ◽  
David J. Lewis
Keyword(s):  
Band Gap ◽  
Iron Sulfide ◽  
Nir Spectroscopy ◽  
Band Gap Energy ◽  
Single Source ◽  
Single Source Precursors ◽  
X Ray ◽  
Gap Energy ◽  
Antimony Sulfide ◽  
Different Temperatures

The antimony-iron sulfide system in general does not produce alloys below 540 °C from traditional solid-state methods. However, single source precursors have been known to produce unexpected products that arise from kinetically trapped polymorphs. In this paper, we test the efficacy of this approach toward the Fe-Sb-S system. Antimony and iron diethyldithiocarbamate complexes of the form Sb[S2CN(Et2)]3 (1) and Fe[S2CN(Et2)]3 (2) were synthesised, characterised, and used as single-source precursors for the preparation of Sb2S3, FexSy, and mixed iron antimony sulfide Sb2(1−x)Fe2xS3 (0 ≥ x ≥ 1) powders using the solvent-less thermolysis method at different temperatures ranging from 300 to 475 °C. The effect of different mole fractions of the iron precursor was evaluated on morphology, shape, and optical and magnetic properties of Sb2(1−x)Fe2xS3 (0 ≥ x ≥ 1). The obtained powders were characterized by X-ray diffraction (XRD), Raman spectroscopy scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy, magnetometer measurement, and UV/vis/NIR spectroscopy. The results demonstrated that the crystalline structure, morphology, and elemental composition of the samples changed with the mole fraction of the precursor. There was significant phase separation between Sb and Fe sulfides noted from EDX spectroscopic mapping, yet an optoelectronic study monitoring the direct band gap energy of antimony sulfide shows that the band gap energy increases as a function of Fe content, which suggests limited alloying is possible from the single source route.

scholarly journals Effect of Stepwise Replacement of LiF by Bi2O3 and of Annealing on Optical Properties of LiF⋅B2O3 Glasses

ISRN Optics ◽  
2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Susheel Arora ◽  
Virender Kundu ◽  
D. R. Goyal ◽  
A. S. Maan
Keyword(s):  
Optical Properties ◽  
Band Gap ◽  
Optical Band Gap ◽  
Urbach Energy ◽  
Optical Characterization ◽  
Band Gap Energy ◽  
Gap Energy ◽  
Different Temperatures ◽  
Quench Method

Bismuth fluoroborate glasses with compositions xBi2O3⋅(40-x)LiF⋅60  B2O3  (x=0,5,10,15,  and  20) are synthesized by melt-quench method. Optical characterization was carried out to examine variation of optical band gap energy (Eg) and Urbach energy (EU) with respect to the concentration. It reflects the effect of stepwise replacement of non-oxide and less polarizable LiF by an oxide and more polarizable (Bi2O3) group on the optical properties of the samples. The value of Eg decreases with increase in concentration of Bi2O3. The samples were subjected to annealing at different temperatures (300°C, 350°C, and 400°C), and the effect of annealing on the optical properties of various samples was again studied. Annealing affects remarkably the values of Eg and EU in the samples with x=0.

scholarly journals Effect of SnO2 Nanoparticles on Band Gap Energy of x(SnO2)-y(Ag)-β-Carotene/FTO Thin Film

2018 ◽  
Vol 1093 ◽  
pp. 012049 ◽  
Author(s):  
Solehudin ◽  
Markus Diantoro ◽  
Ulwiyatus Sa’adah ◽  
Arif Hidayat
Keyword(s):  
Thin Film ◽  
Band Gap ◽  
Sno2 Nanoparticles ◽  
Band Gap Energy ◽  
Gap Energy ◽  
Β Carotene

scholarly journals Dielectric, electrical conduction and magnetic properties of multiferroic Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O3 perovskite compound

2017 ◽  
Vol 07 (05) ◽  
pp. 1750034 ◽  
Author(s):  
Poonam Kumari ◽  
Radheshyam Rai ◽  
Seema Sharma ◽  
M. A. Valente
Keyword(s):  
Magnetic Properties ◽  
Perovskite Phase ◽  
Impedance Analysis ◽  
Hexagonal Structure ◽  
Nyquist Plot ◽  
Magnetic Studies ◽  
Electrical And Magnetic Properties ◽  
Different Temperatures ◽  
Higher Temperature ◽  
Magnetization Field

This work focuses on the structural, electrical and magnetic properties of Bi[Formula: see text]Tb[Formula: see text]Ba[Formula: see text]Fe[Formula: see text]Ti[Formula: see text]O3 ceramics, fabricated by solid state reaction procedure. XRD forms of the samples at RT exhibited perovskite phase through the hexagonal structure at room temperature. Dielectric studies of the materials with frequency at different temperatures (25–400[Formula: see text]C) exhibit two dielectric anomalies, first at 175[Formula: see text]C (ferroelectric–ferroelectric transition) and second at around 320[Formula: see text]C (ferroelectric–paraelectric transition). The Curie temperature moved towards the low side temperature with the increase in frequency. The less value of activation energy got for these samples could be attributed to the influence of electronic contribution to the conductivity. A significant change in the magnetic studies was observed for Bi[Formula: see text]Tb[Formula: see text]Ba[Formula: see text]Fe[Formula: see text]Ti[Formula: see text]O3 ceramic. The impedance analysis confirms the non-Debye type nature of the ceramic and relaxation frequency moved to a higher temperature. The Nyquist plot and conductivity studies showed the NTCR behavior of samples. The highest magnetization field was found at temperature [Formula: see text]268.15[Formula: see text]C.

scholarly journals The high photocatalytic activity and reduced band gap energy of La and Mn co-doped BiFeO3/graphene nanoplatelet (GNP) nanohybrids

RSC Advances ◽  
2017 ◽  
Vol 7 (57) ◽  
pp. 35928-35937 ◽  
Author(s):  
Sabeen Fatima ◽  
S. Irfan Ali ◽  
Muhammad Z. Iqbal ◽  
Syed Rizwan
Keyword(s):  
Photocatalytic Activity ◽  
Band Gap ◽  
Band Gap Energy ◽  
High Photocatalytic Activity ◽  
Graphene Nanoplatelet ◽  
Gap Energy ◽  
Co Precipitation ◽  
Hydrothermal Methods ◽  
Co Doped

This article details a comparison of the photocatalytic activity of La, Mn co-doped BiFeO3/GNP nanohybrids prepared by co-precipitation and hydrothermal methods.

Modification of optical properties of PC-PBT/Cr2O3 and PC-PBT/CdS nanocomposites by gamma irradiation

2020 ◽  
Vol 92 (2) ◽  
pp. 20402
Author(s):  
Kaoutar Benthami ◽  
Mai ME. Barakat ◽  
Samir A. Nouh
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Band Gap ◽  
Color Difference ◽  
Band Gap Energy ◽  
Polybutylene Terephthalate ◽  
Γ Irradiation ◽  
Gap Energy ◽  
Vis Spectroscopy ◽  
Oxygen Atoms

Nanocomposite (NCP) films of polycarbonate-polybutylene terephthalate (PC-PBT) blend as a host material to Cr2O3 and CdS nanoparticles (NPs) were fabricated by both thermolysis and casting techniques. Samples from the PC-PBT/Cr2O3 and PC-PBT/CdS NCPs were irradiated using different doses (20–110 kGy) of γ radiation. The induced modifications in the optical properties of the γ irradiated NCPs have been studied as a function of γ dose using UV Vis spectroscopy and CIE color difference method. Optical dielectric loss and Tauc's model were used to estimate the optical band gaps of the NCP films and to identify the types of electronic transition. The value of optical band gap energy of PC-PBT/Cr2O3 NCP was reduced from 3.23 to 3.06 upon γ irradiation up to 110 kGy, while it decreased from 4.26 to 4.14 eV for PC-PBT/CdS NCP, indicating the growth of disordered phase in both NCPs. This was accompanied by a rise in the refractive index for both the PC-PBT/Cr2O3 and PC-PBT/CdS NCP films, leading to an enhancement in their isotropic nature. The Cr2O3 NPs were found to be more effective in changing the band gap energy and refractive index due to the presence of excess oxygen atoms that help with the oxygen atoms of the carbonyl group in increasing the chance of covalent bonds formation between the NPs and the PC-PBT blend. Moreover, the color intensity, ΔE has been computed; results show that both the two synthesized NCPs have a response to color alteration by γ irradiation, but the PC-PBT/Cr2O3 has a more response since the values of ΔE achieved a significant color difference >5 which is an acceptable match in commercial reproduction on printing presses. According to the resulting enhancement in the optical characteristics of the developed NCPs, they can be a suitable candidate as activate materials in optoelectronic devices, or shielding sheets for solar cells.

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