access icon free Optical and adsorption properties of mesoporous SiO2/Zn2SiO4:Eu3+ hollow nanospheres

Mesoporous SiO2/Zn2SiO4:Eu3+ hollow nanospheres were successfully synthesised via the combination of layer-by-layer and combustion technique. The structures and morphologies of as-obtained SiO2/Zn2SiO4:Eu3+ nanospheres were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and N2 adsorption–desorption isotherms techniques. SiO2/Zn2SiO4:Eu3+ nanospheres can be tested as adsorbents to remove heavy metal ions, which showed good adsorption capacity and selectively adsorption especially for Pb2+ and Cu2+ than Cd2+. The optical properties studies of as-synthesised samples showed that mesoporous SiO2/Zn2SiO4:Eu3+ hollow nanospheres had strong red emission around 618 nm, and the optimal loading dosage of Eu3+ was determined. Moreover, the mesoporous SiO2/Zn2SiO4:Eu3+ hollow nanospheres could offer cell optical imaging by conventional fluorescence with 543 nm excitation.

Inspec keywords: cadmium; nanofabrication; adsorption; nitrogen; copper; combustion synthesis; mesoporous materials; lead; scanning electron microscopy; X-ray diffraction; nanoporous materials; transmission electron microscopy; zinc compounds; silicon compounds; fluorescence; desorption

Other keywords: Pb; X-ray diffraction; XRD; optical properties; N2; red emission; cell optical imaging; adsorption properties; combustion technique; adsorbents; SiO2-Zn2SiO4:Eu; Cu; N2 adsorption-desorption isotherms; structural properties; heavy metal ion removal; fluorescence; wavelength 543 nm; transmission electron microscopy; Cd; scanning electron microscopy; mesoporous hollow nanospheres; layer-by-layer technique; SEM; morphological properties; TEM

Subjects: Flames, combustion, and explosions; Sorption and accommodation coefficients (surface chemistry); Structure of powders and porous materials; Other methods of nanofabrication; Photoluminescence in other inorganic materials; Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials; Optical properties of other inorganic semiconductors and insulators (thin films, low-dimensional and nanoscale structures); Low-dimensional structures: growth, structure and nonelectronic properties; Adsorption and desorption kinetics; evaporation and condensation

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