Co nanoparticles prepared

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Synthesis and CO gas adsorption properties of GO/ZnFe2O4 nanocomposites

In this work, ZnFe2O4 nanoparticles were synthesized by hydrothermal method while the hummer method was used to synthesize GO nanosheet. GO/ZnFe2O4 nanocomposites (GO/ZFO) were prepared by mixing GO with ZnFe2O4 in mass ratio of 1:99, respectively.

8p viengfa 28-10-2024 3 1 Download

Synthesis and characterization of lanthanum-doped cobalt ferrite nanoparticles prepared via simple co-precipitation

In this study, spinel ferrite nanoparticles CoFe2-xLaxO4 (x = 0, 0.025, and 0.05) were successfully synthesized via a simple co-precipitation method using a 5% NaOH solution as a precipitating agent. The physicochemical properties of the materials, annealed at 850 °C for one hour, were characterized using powder X-ray diffraction (PXRD), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), and vibrating-sample magnetometry (VSM) at room temperature.

10p viling 11-10-2024 2 1 Download

Preparation of astaxanthin/pycnogenol nanoparticles: A delivery system with improved astaxanthin stability and bioavailability

Astaxanthin (AST) and pycnogenol (PYC) are natural bioactive compounds commonly used in pharmaceuticals and functional foods due to their highly antioxidant activity and potential health benefits. However, the widespread application of astaxanthin is hindered by its poor water solubility and highly unsaturated structure. In this study, nanoparticles co-delivering astaxanthin and pycnogenol (NAP) were fabricated to enhance the dispersibility, stability, and bioavailability of astaxanthin.

9p vifilm 11-10-2024 1 0 Download
Dissertation summary: Fabrication and magnetic characterization of Fe, Co nanoparticles prepared by high energy ball milling

Find the optimal technology parameters and components for fabricating Fe-based nanomaterials using high-energy ball milling method; clarify the relationship between technological conditions with the structural characteristics and magnetic properties of fabricated materials; assess the applicability of Fe, Fe-Co nano materials in fabricating nanocomposite magnets and magnetic induction heating.

24p capheviahe26 25-01-2021 19 2 Download
Nguyên cứu tổng hợp perovskit LaMn0,5Cu0,5O3 có kích thước nanomet bằng phương pháp đốt cháy gel polyvinyl ancol và muối nitrat kim loại

LaMn0.5Cu0.5O3 was synthesized as nanoparticles with relatively high surface area (19 m2/g) at low temperature (600o C) from gel precursor prepared by using polyvinyl alcohol (PVA) and corresponding metal nitrates. Influence of pH, PVA/metals mole ratio and temperature of gel formation on the crystallization of perovskites was studied. Samples were characterized by X-ray diffraction (XRD), thermogravimetric and differential thermal analysis (TG-DTA), transmission electron microscopy (TEM) and BET (Brunaure-Emmet-Teller) measurements.

6p uocvong01 24-09-2015 46 3 Download
Tổng hợp oxit phức hợp perovskit La1-xSrxCoO3 kích thước nanomet bằng phương pháp Sol-Gel xitrat và nghiên cứu hoạt tính xúc tác của chúng

Nanoparticle of Perovskite La1-xSrxCoO3 (x = 0, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7) were prepared by using citric acid sol-gel method. The structure and morphology of products were investigated by X-ray difraction (XRD) and transmission electron microscopy (TEM). The specific surface area (BET) was determined by N2 adsorption/desorption at 77 K. The catalytic oxidation of propene and removal NOx were studied by Temperature Program Surface Reaction (TPSR) over every compositions. The results show that the contened of substituted ion Sr2+ influenced on the oxidation temperature of propene.

6p uocvong01 24-09-2015 61 2 Download