Characterisation of Zinc Oxide and Cadmium Oxide Nanostructures Obtained from the Low Temperature Thermal Decomposition of Inorganic Precursors

Kalimuthu, Kalpanadevi; Sinduja, C. R.; Manimekalai, R.

doi:10.1155/2013/823040

Cited by 13 publications

(11 citation statements)

References 20 publications

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“…X-ray Analysis. 27 Although both catalysts showed a structure of mixed phases, the FCC phase is more dominant owing to the number of its significant peaks, according to the given spectrum. The exhibited sharp and intense peaks in the spectrum can explicitly reveal the high crystalline structures of both of the prepared catalysts.…”

Section: Resultsmentioning

confidence: 94%

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Photoassisted Desulfurization Induced by Visible-Light Irradiation for the Production of Ultra-Low Sulfur Diesel Fuel Using Nanoparticles of CdO

et al. 2016

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The heterogeneous photocatalytic desulfurization processes have been paid wide attention due to their effectiveness in removing the condensed organo-sulfur compounds. Such methods may gain greater consideration via utilizing the visible light in general and sun spectrum in particular. This research work aims to produce low sulfur diesel fuel through a catalyzed photochemical route using nanoparticles of CdO under the visible-light irradiation. Two various structures of CdO were prepared in this study by both the chemical precipitation and autoignition techniques. The structural and morphological characteristics of the obtained cadmium oxides were determined via different tools of analyzes. The production of a low sulfur diesel fuel was then investigated under various operating parameters, such as type of light source, catalyst-to-feed dosage, and reaction time. The effect of adding oxidizing agents at different concentrations on the desulfurization process was also studied. After the maximum sulfur removal had been detected under the optimum conditions, the ultimate removal of sulfur was attained through a subsequent solvent extraction step. A diesel fuel with a sulfur content of 45 ppm was acquired at the end of this research study. A total sulfur removal of 99.6 wt % was obtained because the original diesel fuel feedstock has an overall concentration of the sulfur compounds of 11 500 ppm.

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Section: Resultsmentioning

confidence: 94%

“…All of the detected peaks are indicative of the formation of CdO, however, at different phases. Specifically, the obtained peaks at 2θ of 33, 38, and 55° are characteristics of the CdO hexagonal closed-packed (HCP) phase, while the face-centered cubic (FCC) phase was detected via the given signals at 65 and 69° …”

Section: Resultsmentioning

confidence: 99%

Photoassisted Desulfurization Induced by Visible-Light Irradiation for the Production of Ultra-Low Sulfur Diesel Fuel Using Nanoparticles of CdO

et al. 2016

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“…Since the invention of atomic force microscopy (AFM) in the 1980s, the signal to noise ratio (SNR) phenomenon has been studied and continuously improved. 1,2 In order to fully characterize an unknown sample, it is important to extract the maximum amount of information from the tip motion of a cantilever in a single-pass experiment. Depending on how the AFM is operated and how the data is interpreted, it is possible to obtain not only a surface topography of a sample but material characteristics as well.…”

Section: Introductionmentioning

confidence: 99%

Effects of laser spot positioning with optical beam deflection method on tapping mode and bimodal AFM

Putnam

Damircheli

Eslami

2020

Proceedings of the Institution of Mechanical Engineers, Part K:

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This work focuses on the importance of laser location and its effect on contact mode, tapping mode, and bimodal AFM both theoretically and experimentally. It is found that the current guidelines in the field might lead to mischaracterization of matter especially in bimodal AFM. A numerical study is done for a cantilever with its tip located at the end while interacting with two different polymers of Polystyrene (PS) and Low-density polyethylene (LDPE). Different observables are recorded at the end of the cantilever, 80% of its length, and 60% of its length. These results are verified by experiments in contact mode, tapping mode and bimodal AFM. Bimodal AFM observables are converted to energy quantities (i.e., virial and dissipated power) which are used to characterize soft matter in this field. Similar to simulation, for each of these measurements three different laser locations are selected. Finally, it is found there are certain locations on the cantilever that should be avoided for placing the laser while exciting higher eigenmodes. Hence, locating the laser around 80% of its length while performing bimodal AFM with the first and second eigenmodes on polymer surfaces can decrease phase contrast. It is concluded that: (1) contact mode AFM on stiff surfaces might not be effected by change of laser location, (2) misalignment of laser can cause up to 40% of mischaracterization in tapping mode and (3) 10% of phase contrast reduction in addition to 20% percent of reduction in amplitude oscillations in bimodal AFM. It is shown this can lead to mischaracterization of material. By positioning the laser location closer to the clamped end of the cantilever, surface indentation can occur. Although this is considered as a surface damage in soft matter imaging, it can be considered as a new capability of multifrequency AFM for surface modification.

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“…In the fields of science and technology, nanotechnology is much substantial. Nanosized research has opened revolutionary opportunities for a wide number of technological applications in the past decade (Kalpanadevi et al 2013). Regarding the nano size materials, transparent metal oxide films are of technological importance for liquid crystal displays, chemical sensors for solar cells, and nanoporous films for dye sensitized solar cells (Jayakrishnan and Hodes 2003).…”

Section: Introductionmentioning

confidence: 99%

An investigation of effects of bath temperature on CdO films prepared by electrodeposition

Yıldırım

Altıokka

2017

Appl Nanosci

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CdO thin films were prepared by electrodeposition method. Solution temperatures were varied from 58 to 98°C. It was understood from the film thicknesses and current densities that the reaction rate increased as the temperature increased. Good crystallization and a thick film were obtained at 98°C. It was found that the energy band gap varied between 1.99 and 2.61 eV depending on the bath temperature. SEM images also showed that surface morphologies were dependent on bath temperature.

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Characterisation of Zinc Oxide and Cadmium Oxide Nanostructures Obtained from the Low Temperature Thermal Decomposition of Inorganic Precursors

Cited by 13 publications

References 20 publications

Photoassisted Desulfurization Induced by Visible-Light Irradiation for the Production of Ultra-Low Sulfur Diesel Fuel Using Nanoparticles of CdO

Photoassisted Desulfurization Induced by Visible-Light Irradiation for the Production of Ultra-Low Sulfur Diesel Fuel Using Nanoparticles of CdO

Effects of laser spot positioning with optical beam deflection method on tapping mode and bimodal AFM

An investigation of effects of bath temperature on CdO films prepared by electrodeposition

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