The biosynthesis of oxide semiconductor nanoparticles (NPs) using materials found in nature opens a wide field study focused on sustainability and environmental protection. Biosynthesized NPs have the capacity to eliminate organic dyes, which pollute water cause severe damage environment. In present work, green synthesis zinc (ZnO) was carried out Capsicum annuum var. Anaheim extract. photocatalytic elimination methylene blue (MB), methyl orange (MO), Rhodamine B (RhB) UV radiation...

This study investigates the corrosion resistance of chitosan and its crosslinked form coatings applied on stainless steel as substrate using various analytical techniques. Fourier transform infrared spectroscopy (FTIR-ATR), scanning electron microscopy (SEM), energy-dispersive X-ray (EDS) were employed for surface characterization. Electrochemical impedance (EIS) potentiodynamic polarization (PDP) techniques used to analyze electrochemical behavior. Four evaluated along with naked (ss):...

The corrosion behavior in molten salts of Inconel 718 (IN 718) superalloy was investigated by Electrochemical Impedance Spectroscopy (EIS). test temperatures used were salt melting points Na2SO4, 80V2O5-20Na2SO4, NaVO3 and natural ash (collected a power plant). Different experimental runs made attempting to establish the material behavior. results showed that process controlled activation some cases diffusion. aggressiveness increased with temperature, as indicated for rates values derived....

Because of the significant environmental impact that concrete production causes, and as sustainability contribution for this industry; presently some improvements are being implemented in its durability components been replaced alternative recyclable materials. Concrete carbonation is one main causes reinforcement electrochemical corrosion. Coarse Recycled Aggregates (RCA) Supplementary Cementing Materials (SCM) such fly ash silica fume were used to produce durable environmentally friendly...

Cementitious materials are indispensable in the construction industry and urban development worldwide because cement pastes, mortars, concrete provide mechanical strength, high durability, excellent stability to various structures that used a lot of civil works. Owing impact relevance these materials, it is frequently seek ways improve their properties characteristics. In recent years, nanomaterials such as nanoparticles (NPs) nanofibers (NFs) has allowed cementitious mechanical, thermal,...

The high demand for nanomaterials in the field of industry and science has forced researchers to develop new synthesis methods that are more efficient, economical, environmentally friendly. At present, application green taken a great advantage over conventional because it helps with control characteristics properties resulting nanomaterials. In this research, ZnO nanoparticles (NPs) were synthesized by biosynthesis using dried boldo (Peumus boldus) leaves. biosynthesized NPs had purity,...

Symmetry in nanomaterials is essential to know the behavior of their properties. In present research, photocatalytic properties SnO2 and ZnO nanoparticles were compared for degradation cationic dyes Methylene Blue (MB) Rhodamine B (RB). The obtained through a green synthesis process assisted by Randia echinocarpa extracts; they then analyzed Fourier transform infrared spectroscopy (FT-IR) X-ray diffraction (XRD) characterize structure. Transmission electron microscopy (TEM) was used identify...

Metals are widely used in various industrial applications due to their advantageous properties, but they often exhibit signs of degradation over time because prolonged exposure environmental conditions. To prevent corrosion, coatings have gained popularity owing practicality maintaining the original shape and dimensions object being protected. Nevertheless, traditional may pose significant toxicological concerns, leading researchers explore eco-friendly alternatives such as chitosan-based...

In this study, 0.5, 1, 3, and 5 % nano-silver containing hydroxyapatite coatings (nAg-HA) on a Ti6Al4V substrate were developed by atmospheric plasma spray (APS), their antibacterial efficiency was evaluated in the following bacterial strains: Escherichia coli, Staphylococcus aureus Pseudomonas aeruginosa. The optimal operating parameters for application determined online diagnostic of thermal HVOF- spraying processes. Scanning electron microscopy (SEM) showed that both micro (Ag) particles...

Abstract In this work, we report the influence of single-ionized oxygen vacancies ( $$V^{\prime}_{{\text{O}}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>V</mml:mi> <mml:mtext>O</mml:mtext> <mml:mo>′</mml:mo> </mml:msubsup> </mml:math> ) as a spin ½ system in ferromagnetic response undoped and Cr-doped SnO 2 nanowires. For study, nanowires were synthesized by thermal evaporation method. Raman, Auger, X-ray photoelectron spectroscopies confirmed...

Currently it is necessary to find alternatives towards a sustainable construction, in order optimize the management of natural resources. Thus, using recycled fine aggregate (RFA) viable recycling option for production new cementitious materials. In addition, use polymeric microfibers would cause an increase properties these this work, mortars were studied with 25% RFA and addition polyacrylonitrile PAN 0.05% cement weight. The obtained by electrospinning method, which had average diameter...

In this work, the photocatalytic activity of nanoparticles (NPs) zinc oxide synthetized by Prosopis laevigata as a stabilizing agent was evaluated in degradation methylene blue (MB) dye under UV radiation. The theoretical study process carried out Langmuir–Hinshelwood–Hougen–Watson (LHHW) model. Zinc were synthesized varying concentration natural extract from 1, 2, and 4% (weight/volume), identifying samples ZnO_PL1%, ZnO_PL2%, ZnO_PL4%, respectively. characterization Fourier transform...

In the present study, biological hydroxyapatite (HA) was obtained from bovine bones through a thermal process. A total of 0% and 1% silver nanoparticles (Ag-NPs) synthesized Opuntia ficus (nopal) were added to coatings using an atmospheric plasma spray (APS) on Ti6Al4V substrate. Following this, its antimicrobial efficiency evaluated against following bacterial strains: Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa. This conducted according Japanese Industrial Standard...

Polyethylene terephthalate (PET) waste has become a major challenge for the conservation of environment due to difficult degradation. For this reason, it is important develop new recycling strategies reusing waste. In work, electrospinning technique was used synthesize composite nanofibers polyvinylpyrrolidone (PVP), PET (RPET) that obtained from chemical postconsumer with glycolysis and styrene (ST) as crosslinking agent. The polymer solutions were analyzed by viscosity frequency sweeping,...

The Ti-15Mo alloys have been studied by using electrochemical measurements. test was made to analyze their resistance and predictability corrosion from green dust samples, SPS samples arc-melt alloying. behavior in Ringer's solution evaluated Potentiodynamic polarization curves, noise SEM (Scanning Electron Microscope). Images were used study predictability.