Enhanced anticorrosion performance of copper by novel N-doped carbon dots

The corrosion inhibition of mild steel in 0.5 M hydrochloric acid by six synthesized heterocyclic compounds was studied using weight loss measurements. The inhibition efficiency exceeded 95%. The excellent inhibitor performance was attributed to the formation of protection adsorption films on the steel surface. The structures of compounds were confirmed by Fourier transform infrared and nuclear magnetic resonance analysis. The adsorption of inhibitor on steel surface followed the Langmuir adsorption isotherm. Quantum chemical calculations were also adopted to clarify the inhibition mechanism.

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Synthesis and investigations of heterocyclic compounds as corrosion inhibitors for mild steel in hydrochloric acid

Corrosion inhibition of carbon steel in 1 M H2SO4 using new Azo Schiff compound: Electrochemical, gravimetric, adsorption, surface and DFT studies

Photoelectrochemical (PEC) solar-fuel conversion is a promising approach to converting energy from sunlight into storable chemical fuels. The development of low cost, highly efficient, and stable semiconductor-based photoelectrodes is a key step in realizing economically viable PEC energy conversion on a global scale. The p-type Cu-based metal oxides possess a wide range of bandgap values and favorable band edges relative to the water splitting redox couples, thus providing promising candidates for PEC solar conversion applications. However, the improvement of the PEC performance for the binary and ternary copper-based metal oxides is severely hindered by the chemical instability and/or unsatisfactory optoelectronic properties. Thus, a fundamental understanding of the key limitations, improvement strategies, and progress of these materials is critical to design high performance and stable photocathodes. Here, we outline the development of p-type binary and ternary Cu-based metal oxide photocathodes, discuss the merits and major challenges of these p-type materials, and present the latest research effort in modifying the materials towards high-performance photocathodes. The critical strategies that have been successfully employed for Cu2O-based solar cells and photocathodes are emphasized to offer guidelines to advance emerging Cu-based photocathodes. Emphasis is placed on the determination of the faradaic efficiency and onset potential of hydrogen generation for the modified photocathodes to properly evaluate the performance and design tandem devices that achieve bias-free solar water splitting. Furthermore, perspectives regarding emerging issues yet to be addressed for the development of Cu-based metal oxide photocathodes with high photocurrent and photovoltage are also presented.

Earth-abundant Cu-based metal oxide photocathodes for photoelectrochemical water splitting

Copper oxide nanoparticles (CuO NPs) are one of the most widely used nanomaterials nowadays. CuO NPs have numerous applications in biological processes, medicine, energy devices, environmental remediation, and industrial fields from nanotechnology. With the increasing concern about the energy crisis and the challenges of chemical and physical approaches for preparing metal NPs, attempts to develop modern alternative chemistry have gotten much attention. Biological approaches that do not produce toxic waste and therefore do not require purification processes have been the subject of numerous studies. Plants may be extremely useful in the study of biogenic metal NP synthesis. This review aims to shed more light on the interactions between plant extracts and CuO NP synthesis. The use of living plants for CuO NPs biosynthesis is a cost-effective and environmentally friendly process. To date, the findings have revealed many aspects of plant physiology and their relationships to the synthesis of NPs. The current state of the art and potential challenges in the green synthesis of CuO NPs are described in this paper. This study found a recent increase in the green synthesis of CuO NPs using various plant extracts. As a result, a thorough explanation of green synthesis and stabilizing agents for CuO NPs made from these green sources is given. Additionally, the multifunctional applications of CuO NPs synthesized with various plant extracts in environmental remediation, sensing, catalytic reduction, photocatalysis, diverse biological activities, energy storage, and several organic transformations such as reduction, coupling, and multicomponent reactions were carefully reviewed. We expect that this review could serve as a useful guide for readers with a general interest in the plant extract mediated biosynthesis of CuO NPs and their potential applications. 

New frontiers in the plant extract mediated biosynthesis of copper oxide (CuO) nanoparticles and their potential applications: A review

A novel thiophene Schiff base as an efficient corrosion inhibitor for mild steel in 1.0 M HCl: Electrochemical and quantum chemical studies

Photoelectrochemical characteristics of CuO films with different electrodeposition time

Incorporating impurities in ZnO provide opportunities to manipulate its electronic and optical properties, which can be exploited for optoelectronic device applications. Among various elements doped in ZnO crystal structure, limited attempts have been accounted for the Sr–doped ZnO system. Further, no theoretical evidence has been reported so far to explore the Sr–doped ZnO frameworks. Here, we report first principle study for the pure and Sr-doped ZnO (Zn1-xSrxO) structure. We employed the Perdew–Burke–Ernzerhof exchange–correlation function parameters in generalized gradient approximations. In light of these estimations, we calculated the electronic band gap, density of states, and optical parameters, for example, absorption, dielectric functions, reflectivity, refractive index, and energy-loss. The studies suggested that Sr incorporation expanded the optical band gap of ZnO. In addition, the energy-loss significantly increased with Sr content which might be associated with an increase in the degree of ...

Asad Mahmood

Papers

A novel thiophene Schiff base as an efficient corrosion inhibitor for mild steel in 1.0 M HCl: Electrochemical and quantum chemical studies

Photoelectrochemical characteristics of CuO films with different electrodeposition time

Effect of Sr doping on the electronic band structure and optical properties of ZnO: A first principle calculation

Kinetic analysis on the synthesis of Mg0.95Zn0.05TiO3 microwave dielectric ceramic by polymeric precursor method

Assessing the adsorption and photocatalytic activity of TiO2 nanoparticles for the gas phase acetaldehyde: A computational and experimental study