Core-Shell Titanate Luminescent Material for Stability
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Solution Overview
Problem
Current titanate luminescent materials lack high stability and optimal luminescent properties, limiting their application in lighting and display technologies.
Innovation Solution
A titanate luminescent material with a core-shell structure, specifically A1-xTiO3:Prx@TiO2My, where A is Ca, Sr, or Ba, M is Ag, Au, Pt, or Cu nanoparticles, and x and y are within defined ranges, is developed using a method involving metal salt solutions, triethanolamine titanium isopropoxide, and reducing agents, resulting in enhanced internal quantum efficiency and luminous intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional titanate luminescent materials are used, then the material structure is simple, but the stability and luminescent properties are insufficient
Solution Approach 1:
The patent employs a core-shell structure where metal nanoparticles (core) are embedded within a titanate matrix (shell). This nested configuration protects the metal nanoparticles while enhancing the luminescent properties and stability of the overall material system.
Solution Approach 2:
The invention creates a composite luminescent material combining metal nanoparticles (Ag, Au, Pt, Pd, or Cu) with titanate matrix (A1-xTiO3:Prx). This composite structure integrates the optical properties of metal nanoparticles with the chemical stability and luminescent characteristics of the titanate host, achieving superior performance compared to conventional single-phase materials.
2Use of energy by moving object
If conventional preparation methods are used, then the process is simple, but the internal quantum efficiency and luminous intensity are low
Solution Approach 1:
The preparation method involves preliminary formation of metal nanoparticle cores before embedding them in the titanate matrix. This sequential approach allows for controlled synthesis of the core-shell structure, ensuring optimal distribution and size of metal nanoparticles, which directly enhances the internal quantum efficiency and luminous intensity of the final luminescent material.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The material exhibits improved stability, color purity, and luminous efficiency, making it suitable for industrial production and applications in lighting and display technologies.
Implementation Method 1
adding a reducing agent, heating at a temperature of 120° C. to 160° C. with stirring, and obtaining TiO2@My colloid
Implementation Method 2
The coordinates of red color of Pr3+ excited by photoluminescence and cathode ray are: x=0.680, y=0.311
Implementation Method 3
metal nanoparticles as a core, TiO2 as an intermediate layer shell, and A1-xTiO3:Prx as an outer layer shell, such that a titanate luminescent material with a core-shell structure is provided, thus increasing an internal quantum efficiency thereof
Data Source
AI summary
A titanate luminescent material has a formula of A1-xTiO3:Prx@TiO2@My; wherein A is at least one selected from the group consisting of Ca, Sr, and Ba; M is at least one nanoparticles selected from the group consisting of Ag, Au, Pt, Pd, and Cu; 0<x≦0.01; y is the molar ratio between M and Ti in A1-xTiO3:Prx@TiO2, and 0<y≦1×10−2; @ represents coating; M is a core, TiO2 is an intermediate layer shell, and A1-xTiO3:Prx is an outer layer shell. The titanate luminescent material has a high stability and a better luminescent performance. A preparation method of the titanate luminescent material is also provided.