ZnO/TiO2 nanocomposite rods synthesized by microwave-assisted method for humidity sensor application

Ashok, Ch.; Rao, K. Venkateswara

doi:10.1016/j.spmi.2014.09.029

Cited by 35 publications

(12 citation statements)

References 18 publications

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“…The average particle sizes were 38 nm and 43 nm for different heating temperatures such as 500°C and 600°C respectively. These results were nearly equal to the XRD average crystalline sizes [16].…”

Section: Particle Size Analyzersupporting

confidence: 55%

Synthesis and Characterization of MgO/TiO2 Nanocomposites

Ashok¹,

K²,

Chidurala³

2015

J Nanomed Nanotechnol

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The nanostructured material properties were showing surprisingly different from the bulk materials. Among these nanostructured materials nanocomposites are of great technological importance because of their small size and high surface to volume ratio. Due to these reason the nanocomposites were used in various potential applications such as optoelectronics, microelectronics, water purification, paints, biomedical field and different sensor fabrication. Present work concentrates on synthesis and characterization of MgO/TiO 2 nanocomposites by Microwave-assisted method using ionic liquid as the initial precursor and different temperature effects were investigated on it. The obtained MgO/ TiO 2 nanocomposites have been characterized by X-Ray Diffraction (XRD), particle size analyser (PSA), transmission electron microscopy (TEM), Fourier transform infrared spectrometer (FTIR), thermo gravimetric/differential thermal analyzer (TG/DTA) and Keithley electric meter for average crystallite size, average particle size, morphological studies, bond analysis, thermal stability and resistance respectively.

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Section: Particle Size Analyzersupporting

confidence: 55%

Synthesis and Characterization of MgO/TiO2 Nanocomposites

Ashok¹,

K²,

Chidurala³

2015

J Nanomed Nanotechnol

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“…Due to its properties, it is non-toxic, stable with a large band gap of about 3.2 eV and 3 eV for anatase and rutile TiO 2 respectively, it is a material with good transparency and high refractive index (n = 2.52) [13]. TiO 2 has a large variety of potential application as gas sensors, planar waveguide, photocatalyst, ceramic membrane anti-reflective coating in solar cells [14][15][16][17]. Various deposition techniques have been widely used to produce TiO 2 thin films.…”

mentioning

confidence: 99%

Nanocrystalline proprieties of TiO₂ thin film deposited by ultrasonic spray pulverization as an anti-reflection coating for solar cells applications

Sali

Kermadi

Zougar

et al. 2017

Journal of Electrical Engineering

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Titanium oxide (TiO2) films have been synthesized on quartz, silicon and textured silicon substrates by chemical ultrasonic spray deposition. The textured silicon substrate was carried out using Na2CO3solution. The sample surface exhibits uniform pyramids with an average height of 5µm. In this paper, particular attention is given to the TiO2films prepared by spray ultrasonic system using Tetra iso-Propoxide Orthotitanate Titanium (TPOT) as a precursor. The solutions were sprayed onto substrates heated at various temperatures 350 - 550 °C. The properties of films as a function of temperature parameter were investigated using structural and optical analysis. According to XRD, FTIR and Micro-Raman spectroscopies, the anatase phase was found and exhibits nanograins of 9 to 15 nm in size. The indirect and direct bad gap were found to increase by increasing substrate temperature due to the decreasing of nanograins size and were estimated to be around 3.28 and 3.38 eV. A transmittance higher than 80% was found. This paper reports on anti-reflection coating application of TiO2layers due to its good transparency and appropriate refractive index varies between 2.19 - 2.40 at λ = 632.8 nm as a function of temperature determined by UVVisNIR spectrophotometer and Ellipsometry. To achieve optimum anti-reflection characteristics different anti-reflection designs were experimentally examined with polished and textured substrates. The average reflectance of the polished silicon used in this study is 39%, with TiO2it decreases to 9%. The textured surface reduces the average reflectance of silicon to be around 14% and it decreases dramatically to 5% after deposition of a single layer of TiO2as an anti-reflection coating. The gain in density of the short-circuit photocurrent assigned to the reduction of reflection losses up to 44% and 58% were predicted with TiO2single-coating in polished and textured silicon substrates respectively.

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“…Microwave hydrothermal synthesis of ZnO nanocomposites or ZnO hybrid nanostructures with additional heat treatment, where the literature review results [ 724 , 725 , 726 , 727 , 728 , 729 , 730 , 731 , 732 , 733 , 734 , 735 , 736 , 737 , 738 ] are summarised in Table 8 .…”

Section: Microwave Hydrothermal Synthesis Of Znomentioning

confidence: 99%

A Review of Microwave Synthesis of Zinc Oxide Nanomaterials: Reactants, Process Parameters and Morphologies

2020

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Zinc oxide (ZnO) is a multifunctional material due to its exceptional physicochemical properties and broad usefulness. The special properties resulting from the reduction of the material size from the macro scale to the nano scale has made the application of ZnO nanomaterials (ZnO NMs) more popular in numerous consumer products. In recent years, particular attention has been drawn to the development of various methods of ZnO NMs synthesis, which above all meet the requirements of the green chemistry approach. The application of the microwave heating technology when obtaining ZnO NMs enables the development of new methods of syntheses, which are characterised by, among others, the possibility to control the properties, repeatability, reproducibility, short synthesis duration, low price, purity, and fulfilment of the eco-friendly approach criterion. The dynamic development of materials engineering is the reason why it is necessary to obtain ZnO NMs with strictly defined properties. The present review aims to discuss the state of the art regarding the microwave synthesis of undoped and doped ZnO NMs. The first part of the review presents the properties of ZnO and new applications of ZnO NMs. Subsequently, the properties of microwave heating are discussed and compared with conventional heating and areas of application are presented. The final part of the paper presents reactants, parameters of processes, and the morphology of products, with a division of the microwave synthesis of ZnO NMs into three primary groups, namely hydrothermal, solvothermal, and hybrid methods.

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ZnO/TiO2 nanocomposite rods synthesized by microwave-assisted method for humidity sensor application

Cited by 35 publications

References 18 publications

Synthesis and Characterization of MgO/TiO2 Nanocomposites

Synthesis and Characterization of MgO/TiO2 Nanocomposites

Nanocrystalline proprieties of TiO₂ thin film deposited by ultrasonic spray pulverization as an anti-reflection coating for solar cells applications

A Review of Microwave Synthesis of Zinc Oxide Nanomaterials: Reactants, Process Parameters and Morphologies

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ZnO/TiO2 nanocomposite rods synthesized by microwave-assisted method for humidity sensor application

Cited by 35 publications

References 18 publications

Synthesis and Characterization of MgO/TiO2 Nanocomposites

Synthesis and Characterization of MgO/TiO2 Nanocomposites

Nanocrystalline proprieties of TiO2 thin film deposited by ultrasonic spray pulverization as an anti-reflection coating for solar cells applications

A Review of Microwave Synthesis of Zinc Oxide Nanomaterials: Reactants, Process Parameters and Morphologies

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Nanocrystalline proprieties of TiO₂ thin film deposited by ultrasonic spray pulverization as an anti-reflection coating for solar cells applications