Copper nanoparticles as inexpensive and efficient catalyst: A valuable contribution in organic synthesis

Mechanism of Stress Relaxation and Phase Transformation in Additively Manufactured Ti-6Al-4V via in situ High Temperature XRD and TEM Analyses

Nanostructured nickel oxide is synthesized through a chemical route and annealed at different temperatures. Contribution of crystallite size and microstrain to X-ray diffraction line broadening are analyzed by Williamson-Hall analysis using isotropic and anisotropic models. None of the models perform well in the case of samples with smaller average crystallite sizes. For sample with crystallite size ~3 nm all models show negative slope which is physically meaningless. Analysis of shape factor shows that the line profiles are more Gaussian like. Size-strain plot method, which assumes a different convolution of the crystallite size and microstrain contributions, is found to be most suitable. The study highlights the fact that the convolution of crystallite size and microstrain contributions may differ for samples and should be taken into account while analyzing the observed line broadening. Microstrain values show a regular decrease with increase in the annealing temperature.

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X-ray diffraction line profile analysis of nanostructured nickel oxide: Shape factor and convolution of crystallite size and microstrain contributions

Optical properties of MgO and Mg(OH)2 nanostructures synthesized by a chemical precipitation method using impure brine

Dual S-scheme heterojunction ZnO–V2O5–WO3 nanocomposite with enhanced photocatalytic and antimicrobial activity

Estimation of lattice strain in nanocrystalline RuO2 by Williamson-Hall and size-strain plot methods.

A simple and efficient lepidocrocite-supported copper oxide catalyst (Fe–CuO) has been successfully prepared by a simple precipitation method in aqueous medium from readily available inexpensive starting materials and was used as a heterogeneous nanocatalyst for the N-arylation of imidazole with various aryl halides. The morphology, crystal structure, magnetic property, chemical state and surface area of the catalyst were studied. The N-arylation reaction was chosen to demonstrate the catalytic efficiency of the as-prepared Fe–CuO. Importantly, the catalyst can be easily recovered by magnetic attraction and its catalytic activity remains unaltered even after 6 consecutive cycles. Hence, Fe–CuO is an environmentally friendly, easily applicable and cost effective catalyst.

R. Sivakami

Papers

Estimation of lattice strain in nanocrystalline RuO2 by Williamson-Hall and size-strain plot methods.

Magnetically retrievable lepidocrocite supported copper oxide nanocatalyst (Fe–CuO) for N-arylation of imidazole

Utilization of IoT-assisted computational strategies in wireless sensor networks for smart infrastructure management

An IoT-Based Deep Learning Approach for Online Fault Detection Against Cyber-Attacks

Intelligent Lender – Prediction of Loan Applicant Credibility Based on the Machine Learning Model