Antimicrobial resistance is an ever-growing global concern to public health with no clear or immediate solution. Silver nanoparticles (AgNPs) have long been proposed as efficient agents fight the growing number of antibiotic-resistant strains. However, synthesis these particles often linked high costs and use toxic, hazardous chemicals, environmental impact. In this study, we successfully produced AgNPs by green aid extract two brown algae-Cystoseira baccata (CB) Cystoseira tamariscifolia...

AlFe₂B₂ pre-catalyst produces a nanocrystalline Fe₃O₄ shell in alkaline media. The system acts as remarkably stable water oxidation electrocatalyst.

In this paper, we explore the drastic differences in transport properties and catalytic activities for two structural polymorphs of NiP2: cubic (Pa3; No. 205) monoclinic NiP2 (C2/c; 15). The former one has been long assumed to be high-pressure metastable phase, as it had originally synthesized through methods. Synthetic situ synchrotron X-ray diffraction studies unambiguously show that polymorph can at ambient pressure but irreversibly transforms into structure above 876 K. Band calculations...

The integral utilization of sustainable resources with versatile, efficient and cleaner processes is encouraged. Hydrothermal treatment subcritical water a chemical free, tunable rapid technology providing enhanced yield compared to conventional extraction was explored for the benign by design depolymerization carrageenan from Chondrus crispus. Up 90% seaweed solubilized operating under nonisothermal regime during heating up 200 °C 75.5% crude attained at 140 °C. Crude could not be...

The biocompatibility properties of gold and silver nanoparticles synthesized by green chemistry.

Bacterial and fungal infections are a challenging global problem due to the reported increasing resistance of pathogenic microorganisms conventional antimicrobials. Nanomaterials promising strategy fight caused by multidrug-resistant microbes. In this work, gold (Au@UP) silver (Ag@UP) nanoparticles were produced for first time green synthesis using an aqueous extract invasive macroalgae Undaria pinnatifida (UP). The characterized wide range physicochemical techniques. Au@UP Ag@UP...

Contaminated water is one of the world's largest health and environmental problem. Emerging pollutants, such as pharmaceutics, are raising increasing concerns, they non-regulated toxic chemicals found in low concentrations that very resilient to conventional treatments. In search for effective methods address this problem, photocatalysis arises a possible solution degrade organic pollutants. TiO2 most widely used catalysts, but reduced photoactivation under visible radiation constitutes...

Using sunlight as the driving force for photocatalytic processes holds great promise sustainability. As a starting point developing material capable of degrading aquatic pollutants using solar energy stimulus, this work focuses on synthesizing Au-TiO2 nanocomposites deposition-precipitation method. Characterization nanoparticles was performed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and Transmission Electron Microscopy (TEM). A model pollutant, paracetamol,...

Over the last years, there has been an increasing trend towards use of environmentally friendly processes to synthesize nanomaterials. In case nanomedicine, bionanofactories with associated biological properties, such as seaweed, emerged a promising field work due possibility they open for both preservation those properties in nanomaterials synthesized and/or reduction their toxicity. present study, gold ([email protected]) and silver nanoparticles were using aqueous extract Saccorhiza...

Research on gold nanoparticles (AuNPs) occupies a prominent place in the field of biomedicine nowadays, being their putative toxicity and bioactivity areas major concern. The green synthesis metallic using extracts from marine organisms allows avoidance hazardous production steps while maintaining features interest, thus enabling exploitation promising bioactivity.To synthesize characterize AuNPs using, for first time, macroalga Cystoseira tamariscifolia aqueous extract (Au@CT).Algal were...

This study reports on the green and cost-efficient synthesis of gold nanoparticles from three different red algae extracts. The synthesized were fully characterized by UV-Vis spectroscopy, HRTEM, Z-potential. Relevant components occurring in extracts, such as polysaccharides or phenolic content, assessed analytical techniques spectrophotometric assays liquid chromatography. Finally, antioxidant, antitumoral, anti-inflammatory potential both extracts analyzed order to determine a possible...

The significance of gold nanoparticles in nanobiotechnology and the trend towards development green methods synthesis has boosted research on use new natural resources, such as plants, reducing agents for formation nanoparticles. This article focuses Hypericum perforatum L., a plant known since ancient times its multiple applications treatment variety diseases. In this study, flowers, leaves, stems were separated their corresponding ethanolic extracts (HPF, HPL, HPS) extensively...

Macroalgae are sources of bioactive compounds that interesting from both a chemical and medical point view. Although their use in biomedicine has increased significantly recent years, tests conducted to date have been mostly related species temperate latitudes, with the potential application Antarctic biodiversity being minor. The wide variety algae present on coastal areas can be source new antioxidants. Bearing this mind, brown macroalgae Desmarestia antarctica (DA) red Iridaea cordata...

Photodynamic therapy (PDT) has been established as one of the most promising novel cancer therapies with fewer side-effects and enhanced efficacy compared to currently available conventional treatments. However, its application hindered by limitations that photosensitizers (PS) have. The combination PS metallic nanoparticles like platinum (PtNPs), can help overcome these intrinsic drawbacks. In this work, PtNPs natural photosensitizer riboflavin (RF) is proposed. are synthesized using RF...

Chalcogenide semiconducting nanoparticles are promising building blocks for solution-processed fabrication of optoelectronic devices. In this work, we report a new large-scale colloidal synthesis metastable CuInSe2 with hexagonal plate-like morphology. Powder X-ray diffraction analysis the showed that structure is not simple wurtzite-type (space group P63mc), indicating formation an ordered superstructure. Detailed insight into structural aspect was explored by high-resolution electron...

Cancer still poses a global threat, since lot of tumors remain untreatable despite all the available chemotherapeutic drugs, whose side effects, it must also be noted, raise concerns. The antitumoral properties marine seaweeds make them potential source new, less toxic, and more active agents. Furthermore, these natural extracts can combined with nanotechnology to increase their efficacy improve targeting. In this work, Codium tomentosum (CT) aqueous extract was employed for green synthesis...

Photocatalysis is a low-cost solution to efficiently remove resilient emergent pollutants from water matrixes with complex chemical structures, such as pharmaceuticals.