Anhydrous synthesis and organic waterproof skin of NaBiF4: Yb3+/Er3+ microspheres
Source abstract
Abstract
Abstract Uniform up-converting (UC) microspheres NaBiF4: Yb3+/Er3+ were obtained via ultrafast chemical precipitation in anhydrous condition using ethylene glycol (EG) as solvents, and the water-dosage dependent hydrolyzates were further investigated in detail for the first time. The super sensitivity of NaBiF4: Yb3+/Er3+ to water seriously hinders its potential application because of the formation of new component BiF3: Yb3+/Er3+ in the hydrolysis process and leading to the change of UC emission. In order to improve the hydrolysis-resistance of NaBiF4: Yb3+/Er3+, a layer of organic shell was formed on the surface of NaBiF4: Yb3+/Er3+ microspheres through esterification between the surface absorbed EG molecules and citric acid monohydrate (CA) or Poly (acrylic acid) (PAA). The protective shell was proved to be formed through transmission electron microscope (TEM) images and Fourier Transform infrared (FT-IR) spectra, and the water-resistance of the organic skin modified NaBiF4: Yb3+/Er3+ were also confirmed by immersing in water for several days. Organic protective layer could effectively enhance the water-resistance and retard hydrolysis of NaBiF4: Yb3+/Er3+ at the cost of slightly reduced UC emission intensity. The strategy provides a new efficient scheme to improve hydrolysis resistance of materials.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Microwave Dielectric Ceramics Synthesis · Advanced Sensor and Energy Harvesting Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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