Influence of Ce doping on CuO nanoparticles synthesized by microwave irradiation method

Ponnar, M.; Thangamani, C.; Monisha, P.; Gomathi, S.; Pushpanathan, K.

doi:10.1016/j.apsusc.2018.01.126

Cited by 117 publications

(29 citation statements)

References 55 publications

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“…Due to their high surface area to volume ratio, CuO NPs are widely used in sensors, energy storage devices, antimicrobial activity, environmental remediation, and catalytic applications [1][2][3][4]. To date, several experimental methods have been utilized to synthesize CuO NPs, including sol-gel process [5], electrochemical approach [6], sonochemistry [7], and microwave irradiation [8]. While the conventional wet chemistry method was very effective in producing homogeneously sized CuO NPs, the environmental hazards posed by the usage of certain chemical species remained a major concern [9,10].…”

Section: Introductionmentioning

confidence: 99%

Muntingia calabura Leaves Mediated Green Synthesis of CuO Nanorods: Exploiting Phytochemicals for Unique Morphology

et al. 2021

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In this study, phytochemical assisted nanoparticle synthesis was performed using Muntingia calabura leaf extracts to produce copper oxide nanoparticles (CuO NPs) with interesting morphology. Scanning electron microscope (SEM) and transmission electron microscope (TEM) analysis of the biosynthesized CuO NPs reveal formation of distinct, homogeneous, and uniform sized CuO nanorods structure with thickness and length of around 23 nm and 79 nm, respectively. Based on Fourier-transform infrared (FTIR) analysis, the unique combinations of secondary metabolites such as flavonoid and polyphenols in the plant extract are deduced to be effective capping agents to produce nanoparticles with unique morphologies similar to conventional chemical synthesis. X-ray diffraction (XRD) analysis verified the monoclinical, crystalline structure of the CuO NPs. The phase purity and chemical identity of the product was consolidated via X-Ray photoelectron spectroscopy (XPS) and Raman spectroscopic data which indicate the formation of a single phase CuO without the presence of other impurities. The direct and indirect optical band gap energies of the CuO nanorods were recorded to be 3.65 eV and 1.42 eV.

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Section: Introductionmentioning

confidence: 99%

Muntingia calabura Leaves Mediated Green Synthesis of CuO Nanorods: Exploiting Phytochemicals for Unique Morphology

et al. 2021

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“…Parameters ωk , δk , and βk should be obtained in order to train neural network of single hidden layer through Equation (8) in accordance to the operational principle of ELM.…”

Section: Mathematical Background Of the Employed Intelligent And Stepwise Regression-based Algorithmsmentioning

confidence: 99%

“…Modeling of energy gap of doped CuO semiconductors was carried out using fifty-seven samples of the semiconductor as extracted from the literature [8,10,11,[29][30][31][32][33][34][35][36][37]. The lattice parameters of the semiconducting samples after dopant incorporation serve as the model inputs.…”

Section: Description Of Data Acquisition and Data Sourcementioning

confidence: 99%

“…The p-type nature of CuO semiconductor comes into being due to the presence of acceptor levels attached to vacancies in copper atoms, where charge compensation is achieved through incorporation of impurities or formation of Cu 3+ with equivalent concentration [6]. Improvement in its optical properties due to dopants inclusion as well as varying experimental conditions has been reported in the literature [7][8][9]. Doping introduces crystal defects into CuO semiconducting crystal structure which serves as points of photon scattering.…”

Section: Introductionmentioning

confidence: 99%

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Engineering the Energy Gap of Cupric Oxide Nanomaterial Using Extreme Learning Machine and Stepwise Regression Algorithms

Alqahtani

2021

Journal of Nanomaterials

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CuO is a narrow band gap semiconductor with distinct features that render it indispensable in many industrial and technological applications such as environmental friendly catalysts for organic pollutant removal, sensors, photovoltaic, solar cells, batteries, and storage media among others. Engineering of its energy gap becomes imperative and necessary for tailoring its light absorption capacity to a desired level required for a particular application. Elemental doping mechanisms with accompanied lattice distortion symmetry breaking effectively enhance the optical property of this semiconductor and serve as a major route through which material design is achieved. This work develops an extreme learning machine intelligent predictive (ELM-IP) model and stepwise regression (SWR) based model for estimating energy gap of a doped CuO semiconductor. The developed ELM-IP-Sin model which employs sine activation function performs better than the ELM-IP-Sig model (that utilizes sigmoid activation function) and SWR model with a percentage improvement of 14.15% and 50.05%, respectively, using root mean square error (RMSE) metric, while the developed ELM-IP-Sig model outperforms the SWR-based model. The developed models further investigate the dependence of CuO energy gap on iron and cobalt impurity incorporation, and the obtained results agree well with measured values. The outstanding performance of the developed models is highly meritorious in tailoring the light response capacity of CuO semiconductor for photocatalytic and optoelectronics applications at a reduced cost while the experimental stress is circumvented.

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“…Due to their unique properties, perovskite-based photocatalysts promising candidate for photocatalytic degradation for different dyes. Peng et al synthesized LaFeO3/montmorillonite nanocomposites for photocatalytic dye degradation of rhodamine B under visible light irradiation, their degradation rate approximately 99.35% [35] and La0.7Sr0.3MnO3 nano-perovskites used for photocatalytic degradation of methyl orange (MO) [36] and LaFeO3 perovskites/Reduced graphene composites prepared for methylene blue under visible light irradiation [37]. Furthermore, the catalytic behavior of double perovskite structures depends on metals.…”

Section: Introductionmentioning

confidence: 99%

Structural, Optical and Photocatalytic Activity of The Cerium Doped Ba2TiMoO6 Double Perovskite.

Ghrib¹,

Al-Otaibi²,

Mahmoud³

et al. 2021

Preprint

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In this work, it was highlighted synthesis strategy and fundamental characterization of the pure and Ce doped Ba2TiMoO6 with different Ce concentrations were presented. It was investigated its thermal stability by using the Thermal Gravimetric Analysis and Differential Thermal Analysis. The crystal structures and the purity of the compounds were analyzed by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. The Surface morphology was examined by using Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and surface area analysis. The optical properties were examined by using the UV-Vis diffuse reflectance and photoluminescence (PL) spectroscopies. The prepared Ba2TiMoO6 nanopowders are characterized by band gap of 3.41~3.6 eV and violet emission of 426.67 nm wavelength. The degradation efficiency was found approximately 16% of Methyl Blue (MO) after 120 min duration. Our results will predicate new Perovskites materials, which can be used for future environmental applications.

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Influence of Ce doping on CuO nanoparticles synthesized by microwave irradiation method

Cited by 117 publications

References 55 publications

Muntingia calabura Leaves Mediated Green Synthesis of CuO Nanorods: Exploiting Phytochemicals for Unique Morphology

Muntingia calabura Leaves Mediated Green Synthesis of CuO Nanorods: Exploiting Phytochemicals for Unique Morphology

Engineering the Energy Gap of Cupric Oxide Nanomaterial Using Extreme Learning Machine and Stepwise Regression Algorithms

Structural, Optical and Photocatalytic Activity of The Cerium Doped Ba2TiMoO6 Double Perovskite.

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