Carbon nanofibers (CNFs) have been synthesized from thermoplastic polyvinylpyrrolidone (PVP) using electrospinning in combination with a novel three-step heat treatment process, which successfully stabilizes the fibrous morphology before carbonization that was proven to be difficult for thermoplastic polymers other than polyacrylonitrile (PAN). These CNFs are both mesoporous and microporous wit...

the present study concentrates on the synthesis of au nanoparticles (aunps) using aqueous solution of polyvinylpyrrolidone (pvp) and tetrachloroaurate by different methods as thermal, sonochemical and electrochemical reduction. the pvp has been used as a reducing agent and acts as a stabilizer for au nano particles that obtained as principal product. in all synthesis procedures, the active radi...

In this study the polymer composite specimen has been prepared by using polymer Polyvinylpyrrolidone (PVP) a Potassium iodide (KI) and alumina nanoparticles. The polymer composite specimens were developed by using solution cast techniques. The main objective of the project is to study microstructure, XRD, ionic conductivity, ionic transference number, glass transition temperature using DSC, mic...

Laser ablation has several advantages over the chemical synthesis of nanoparticles due to its simplicity and because it is a faster and cleaner process. In this paper, we use femtosecond laser ablation to generate highly concentrated silver colloidal nanoparticle solutions. Those high concentrations usually lead to agglomeration of the nanoparticles, rendering the solution nearly useless. We em...

Nanoparticles of rubidium cobalt hexacyanoferrate (RbjCok[Fe(CN)6]l · nH2O) were synthesized using different concentrations of polyvinylpyrrolidone (PVP) to produce four different batches of particles with characteristic diameters ranging from 3 to 13 nm. Upon illumination with white light at 5 K, the magnetization of these particles increases. The long-range ferrimagnetic ordering temperatures...

In this work, a blend of gelatin A (GA) and polyvinylpyrrolidone (PVP K30) was used for semi-solid 3D printing bone scaffold ibuprofen (IBU) delivery. The cross-linking the obtained performed with 1% glutaraldehyde (GTA) solution, followed by lyophilization. thermal mechanical properties, as well drug release profiles, kinetics prepared scaffolds were investigated. cross-linked lyophilized has ...

Based on H-cell measurements, gold (Au) is one of the most selective catalysts for CO 2 reduction reaction (CO RR) to CO. To ensure a high dispersion, typically Au small nanoparticles (NPs) are used as catalyst. However, preparation NPs based conventional synthesis methods often requires use surfactants such polyvinylpyrrolidone (PVP). Here, we present systematic evaluation performance laser-ge...

In the synthesis of nanoparticles, phenomenon agglomeration is an undesirable condition because particles formed can be larger. The use surfactants prevent occurrence this phenomenon. study, was studied in nanosilica from geothermal sludge. method applied sol-gel method. A 1 M sodium hydroxide (NaOH) solution used to prepare sol phase, while gel phase prepared at pH 5 using a 1.5 hydrochloric a...

In nature, the combination of composition, structure, and shape determines matter's functional performance to a large extent. Inspired by which, two electrospun Janus nanofiber formulations were created using side-by-side electrospinning in this work. Tamoxifen citrate (TAM) was used as model drug ethyl cellulose (EC) polyvinylpyrrolidone K60 (PVP) polymer carrier matrices. The fibers have line...