期刊
MATERIALS TODAY COMMUNICATIONS
卷 33, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mtcomm.2022.104574
关键词
Magnetic nanosystems; Copper ferrites; Calcium phosphate; Core -shell; Sol -gel; Optical; Electrochemical sensing and biosensing
Calcium phosphate/ CuxFe3-xO4 core-shell nanoceramics were synthesized using the sol-gel process and characterized. The nanoceramics exhibited a porous structure with internal Cu-ferrite coating, showing improved optical and electrochemical properties. This makes them promising candidates for magneto-optical and peroxide sensor applications.
Calcium phosphate/ CuxFe3-xO4 core-shell nanoceramics have been synthesized using the organic sol-gel process and calcined at 600 oC. The nanoceramics were explored by X-ray powder diffractometry (XRD), transmission electron microscopy (TEM)), Fourier transform infrared spectroscopy (FT-IR), UV-visible Diffuse Reflectance spectra (DRS), and electrochemical techniques including cyclic voltammetry (CV), and electrochemical imped-ance spectroscopy (EIS). The FTIR results confirmed the presence of calcium phosphate (CP) and CP coated with Cu-ferrite (0-30 mol% Cu:Fe3O4) core-shell nanoceramics. TEM analysis displayed nanospheres of calcium phosphate shielded with a porous spheres-like morphology with internal nanoparticles of about 33 nm. The reflectance spectra increase for all samples with increasing wavelength. Both direct and indirect gap transitions were detected with lower values of the direct case than the indirect type. The dielectric constant, refractive index, and optical electronegativity of all samples were calculated. When the ferricyanide was applied as the standard redox probe for the electrochemical characterization, CV and EIS results revealed a remarkable enhancement in the generated electrochemical signals. Moreover, modified screen-printed electrodes with the 20 Cu-CPF produced the highest redox current (0.198 mA) towards the direct oxidation of hydrogen peroxide. The obtained interesting features nominate the newly developed core-shell calcium phosphate/CuxFe3-xO4 nano -ceramics as promising candidates for talented magneto-optical and peroxide sensor applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据