Synthesis of nickel–cerium oxide solid-solution hollow fine particles by ultrasonic spray pyrolysis with citric acid addition

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL Advanced Powder Technology Pub Date : 2024-07-07 DOI:10.1016/j.apt.2024.104563

Takuya Kinonshita , Daisuke Murakami , Yoshiya Wada , Yoshiki Okada

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Abstract

Fine hollow nickel (Ni) and cerium (Ce) oxide (Ni_xCe₁₋_xO₂₋_x) composite particles were synthesized from nickel and cerium nitrates by spray pyrolysis with citric acid as a templating additive. The synthesis of Ni_xCe₁₋_xO₂₋_x solid-solution particles was achieved when the molar ratio of Ni in the starting material was 25 mol%. When the Ni molar ratio was higher than 33 mol%, the particles consisted of two crystalline phases: a solid solution and nickel oxide. Citric acid acted as a template and generated cavities inside the particles. Changing the concentration of citric acid enabled control of the internal structure of the particles. Solid particles with solid interiors, sponge-like particles with an internal network structure, and hollow particles with a large spherical internal cavity were produced by regulating the citric acid concentration.

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通过添加柠檬酸的超声喷雾热解法合成氧化镍铈固溶体空心微粒

以镍和铈硝酸盐为原料，以柠檬酸为模板添加剂，通过喷雾热解合成了细小的中空镍（Ni）和铈（Ce）氧化物（NixCe1-xO2-x）复合颗粒。当起始材料中镍的摩尔比为 25 摩尔%时，就能合成 NixCe1-xO2-x 固溶粒子。当镍摩尔比高于 33 摩尔%时，颗粒由两种结晶相组成：固溶体和氧化镍。柠檬酸作为模板在颗粒内部产生空穴。改变柠檬酸的浓度可以控制颗粒的内部结构。通过调节柠檬酸浓度，可以制备出具有实心内部结构的实心颗粒、具有内部网络结构的海绵状颗粒以及具有大球形内部空腔的空心颗粒。

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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.)