Biogenic synthesis of copper oxide nanoparticles using plant extract and its prodigious potential for photocatalytic degradation of dyes

Green synthesis of copper oxide nanoparticles for biomedical application and environmental remediation

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Metal oxide nanostructures for sensor applications

Metal-oxide semiconductors for carbon monoxide (CO) gas sensing: A review

Electrochemical sensing and remediation of 4-nitrophenol using bio-synthesized copper oxide nanoparticles

In this study, cupric oxide (CuO) nanoparticles were synthesized via sonochemical method. The samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscope, and transmission electron microscopy. The spherical CuO nanoparticles were dispersed in sodium hexametaphosphate under sonication (25 kHz) to analyze the particle size distribution and UV absorption spectra. Using these absorption spectra, we further examined the CuO nanoparticle to explore the possibility of using them as a material for applications such as solar cell and textile production.

/pdf/study-of-structural-and-optical-properties-of-cupric-oxide-1bymmcs2of.pdf

Study of structural and optical properties of cupric oxide nanoparticles

Investigations on micro hardness, electrical and thermal conductivity of AA7075 surface hybrid composites produced through friction stir processing

In recent years, application of aluminum materials in aircraft structures with output responses like maximum material removal rate and minimal surface roughness is at great necessity. This performance is attained during the wire cut electrical discharge machining and is influenced by the extent of ceramic inclusions in the aluminum matrix. The current research focuses on improving the machining performance of as-prepared aluminum zirconium diboride AA2024–ZrB2 prepared at different weight ratios of ZrB2 particles as 0, 2.5, 5, 7.5 and 10 wt%. The as-prepared samples are investigated for different characterizations like phase identification using X-ray diffraction technique; microstructure analysis using both optical microscope and field emission scanning electron microscope; and analysis of mechanical properties using tensile strength and micro-hardness tests. During the machining process, four input parameters like pulse on time Ton (μs), pulse off time Toff (μs), gap voltage GV (V) and ZrB2 wt% are considered for optimization and obtains 23 μs, 41 μs and GV 100 V at 2.5 wt% ZrB2. During machining, multi-response optimization, using response surface methodology with desirability function is performed. The output responses as of maximum material removal rate (MRR) of 0.0765 g/min and minimum surface roughness (SR) of 3.618 μm are obtained. The addition of different wt% ZrB2 in the base matrix has greatly influenced the output response like MRR and SR in the aluminum matrix.

Optimization of CNC-WEDM Parameters for AA2024/ZrB2 in situ Stir Cast Composites Using Response Surface Methodology with Desirability Function Technique

Simple solid-state and sol–gel routes have been used to synthesize nanocomposites of tin oxide and magnesium aluminate at calcination temperature of 900 K for gas sensing applications. The effects of the surface structure of magnesium aluminate on the gas response for different concentrations of tin oxide addition were investigated for potential use in gas sensors. (SnO2)x doped in small amounts x into magnesium aluminate resulted in three nanocomposite samples MAS0.25, MAS0.50, and MAS0.75 for x = 0.25, 0.50, and 0.75, respectively, plus MgAl2O4 (MA) for x = 0. The response to different pressures of gases such as oxygen (O2), carbon monoxide (CO), and ethanol (C2H5OH) was quantitatively analyzed for all samples at different operating temperatures. The temperature was varied linearly by increasing the supply to a heating pad mounted below the sensor sample, regardless of the gas pressure inside the chamber. All the sample materials showed good response at different gas pressures (1 bar to 2 bar) and operating temperatures (300 K to 600 K). It was noted that the composite samples showed enhanced and fast response to gases, at both lower and higher operating temperatures, with detection of even the smallest change in gas pressure.

Fabrication of Nanocomposites of SnO 2 and MgAl 2 O 4 for Gas Sensing Applications

https://iopscience.iop.org/article/10.1088/2053-1591/aa6140/pdf

N. Nithyavathy

Papers

Study of structural and optical properties of cupric oxide nanoparticles

Investigations on micro hardness, electrical and thermal conductivity of AA7075 surface hybrid composites produced through friction stir processing

Optimization of CNC-WEDM Parameters for AA2024/ZrB2 in situ Stir Cast Composites Using Response Surface Methodology with Desirability Function Technique

Fabrication of Nanocomposites of SnO 2 and MgAl 2 O 4 for Gas Sensing Applications

An efficient photoanode for dye sensitized solar cells using naturally derived S/TiO2 nanoparticles