Solvothermal phase selection of Cr3+-doped (NH4)xScF(3+x) compounds (x = 0, 1, 3), structure, and NIR luminescence

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology Pub Date : 2024-09-19 DOI:10.1016/j.apt.2024.104673

Sihan Feng , Zhiyuan Pan , Yun Wang , Xuejiao Wang , Qi Zhu , Ji-Guang Li

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Abstract

5 at% Cr³⁺ doped ScF₃, NH₄ScF₄ and (NH₄)₃ScF₆ were selectively synthesized via solvothermal reaction of metal nitrate and NH₄F in methanol for 24 h, with the effects of NH₄F/M molar ratio (M=Sc_0.95Cr_0.05), methanol content and reaction temperature (up to 140 °C) being systematically investigated. The compounds were characterized in detail for crystal structure, microstructure, thermal behavior and vibrational properties, and broadband NIR luminescence (∼700–1300 nm) with an FWHM (full width at half maximum) as large as ∼156 nm was obtained from the as synthesized ScF₃:Cr³⁺ phosphor powder under 470 nm blue light excitation. The technique is advantageous over aqueous processing since it allows high yield production of the water-soluble ammonium fluoroscandates and was expected to be well applicable to analogous materials such as those of the Al, Ga and In elements.

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掺杂 Cr3+ 的 (NH4)xScF(3+x) 化合物（x = 0、1、3）的溶热相选择、结构和近红外发光特性

通过硝酸金属与 NH4F 在甲醇中的溶解热反应 24 小时，选择性地合成了 5 at% Cr3+ 掺杂的 ScF3、NH4ScF4 和 (NH4)3ScF6，并系统研究了 NH4F/M 摩尔比（M=Sc0.95Cr0.05）、甲醇含量和反应温度（最高 140 °C）的影响。在 470 nm 蓝光激发下，合成的 ScF3:Cr3+ 荧光粉获得了宽带近红外发光（∼700-1300 nm），其 FWHM（半最大全宽）可达 ∼156 nm。与水处理相比，该技术的优势在于可以高产率地生产出水溶性铵荧光粉，并有望很好地应用于类似材料，如铝、镓和铟元素的材料。

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来源期刊

Advanced Powder Technology 工程技术-工程：化工

CiteScore

9.50

自引率

7.70%

发文量

424

审稿时长

55 days

期刊介绍： The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide. The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them. Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)