In order to upgrade existing electronic technology, we need simultaneously to advance power supply devices to match emerging requirements. Owing to the rapidly growing wearable and portable electronics markets, the demand to develop flexible energy storage devices is among the top priorities for humankind. Flexible supercapacitors (FSCs) have attracted tremendous attention, owing to their unrivaled electrochemical performances, long cyclability and mechanical flexibility. Carbon nanotubes (CNTs), long recognized for their mechanical toughness, with an elastic strain limit of up to 20%, are regarded as potential candidates for FSC electrodes. Along with excellent mechanical properties, high electrical conductivity, and large surface area, their assemblage adaptability from one-dimensional fibers to two-dimensional films to three-dimensional sponges makes CNTs attractive. In this review, we have summarized various assemblies of CNT structures, and their involvement in various device configurations of FSCs. Furthermore, to present a clear scenario of recent developments, we discuss the electrochemical performance of fabricated flexible devices of different CNT structures and their composites, including additional properties such as compressibility and stretchability. Additionally, the drawbacks and benefits of the study and further potential scopes are distinctly emphasized for future researchers.
Pesticides are widely used to prevent bug infestation in agricultural crops and to get rid of other pests and disease-carrying creatures including mice, rats, ticks, and mosquitoes from various environment and h In response to this environmental and human health hazard, a dire need for remediation has emerged in the last few decades. Green approaches for the remediation of pesticides can boost sustainable development. A biomimetic approach for degradation of pesticides can have high potential to generate ripples of positive outcomes. Biomimetic catalysts are synthetic chemical molecules which have been inspired by natural processes to mimic their structural and functional properties. This short review concisely focuses on the synthesis of various biomimetic catalysts including metal-based materials, carbon-based materials and others. In this context, recent advances achieved by such biomimetic catalysts for the degradation of pesticides have been covered. It highlights the importance of adopting a biomimetic approach as it provides a green and efficient method for pesticides degradation
The efficiency of 4-(2-pyridylazo-)-resorcinol (PAR) as corrosion inhibitor for mild steel in H 2 SO 4 was investigated by electrochemical methods such as steady state galvanostatic and potentiostatic polarisation measurements. The dissolution parameters such as corrosion currents, passive current, flade potential, open circuit potential, cathodic and anodic Tafel slopes and efficiencies were determined. Potentiodynamic polarisation was used to assess the ability of heterocyclic organic inhibitor/PAR to provide an effective barrier to corrosion in acidic environments. Electrochemical measurements showed that the heterocyclic compound investigated has a fairly good inhibiting properties. The absorption and corrosion rates based on heat of adsorption and activation energies are calculated from Langmuir's adsorption isotherm. The inhibition efficiency range of 84-93% is obtained for a concentration range of 10 27 -10 21 mol L 21 . Passivating parameters revealed that this inhibitor is strongly passivating. Scanning electronic microscopy observations and quantum chemical calculations along with the electrochemical data suggested that the ability of PAR to act as a physical barrier was more important in providing corrosion protection of mild steel surface against acidic environments.
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