Preparation of Metal Compounds—from Fundamental Mechanisms to Circular Economy Applications

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: 28 February 2026 | Viewed by 604

Special Issue Editor


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Guest Editor
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
Interests: metal compounds; synthesis process; metal oxidation dissolution; crystallization; ultrasonic technology; unconventional technology

Special Issue Information

Dear Colleagues,

Metal compounds, as core products of deep metal processing, serve as critical functional materials in strategic industries such as new energy, electronic information, and national defense. Their preparation processes directly influence material performance and industrial application efficiency. Conventional metallurgical and synthetic methods often face bottlenecks such as limited reaction kinetics, low impurity removal efficiency, and high energy consumption/emissions. Therefore, enhancing metal compound preparation, including oxidative dissolution, crystallization control, and impurity separation, is pivotal for achieving efficient, low-carbon, and green metal resource conversion.

This Special Issue aims to systematically explore the scientific mechanisms and engineering applications of cutting-edge technologies in metal compound preparation, facilitating their transition from laboratory research to industrial production and supporting circular economy and sustainable development goals.

This Special Issue focuses on cutting-edge advances in metal compound preparation, including, but not limited to, the following topics:

  1. Synthesis mechanisms of metal compounds enhanced by advanced preparation technologies.
  2. Efficient recycling of secondary resources and green preparation.
  3. Energy saving and pollution control in the preparation of metal compounds.

We welcome original research articles and reviews that contribute to the advancement this field. Join us in advancing ultrasonic technology for sustainable metal compound production.

Dr. Thiquynhxuan Le
Guest Editor

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Keywords

  • advanced preparation technology
  • preparation of metal compounds
  • oxidative dissolution
  • crystallization process
  • impurity removal
  • secondary resources

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Published Papers (1 paper)

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Research

21 pages, 4231 KB  
Article
Ultrasonic Enhancement of Tin Dissolution in NaOH/H2O2 System: Electrochemical and Passivation Modulation
by Dongbin Wang, Mingge Fu, Tian Wang, Wenlong Miao, Liuxin Xiang, Thiquynhxuan Le and Libo Zhang
Metals 2025, 15(9), 1016; https://doi.org/10.3390/met15091016 - 12 Sep 2025
Viewed by 487
Abstract
In the alkaline process for sodium stannate preparation, the oxidative dissolution of tin in the NaOH-H2O2 system originates from a spontaneous electrochemical reaction. This study elucidates the mechanism of ultrasound-enhanced tin dissolution in NaOH/H2O2 solutions from an [...] Read more.
In the alkaline process for sodium stannate preparation, the oxidative dissolution of tin in the NaOH-H2O2 system originates from a spontaneous electrochemical reaction. This study elucidates the mechanism of ultrasound-enhanced tin dissolution in NaOH/H2O2 solutions from an electrochemical perspective, with particular emphasis on the tripartite regulatory effects of ultrasound on mass transfer, passivation suppression, and reaction pathway modulation. Electrochemical analysis indicates that ultrasound enhances mass transfer by disrupting the diffusion boundary layer, delays passivation, accelerates the exfoliation of the passive layer, and generates hydroxyl radicals that lower cathodic activation barriers. Under the action of 30 W ultrasound, the apparent diffusion coefficient of the solution increases and the passivation process of the tin sheet is delayed (the oxidation peak potential shift changes from −0.76 V to −0.70 V). After the passive layer is exfoliated by ultrasound, the charge transfer resistance decreases by 85.8% (from 8.09 ± 0.01 Ω to 1.15 ± 0.01 Ω). Ultrasound effectively overcomes the kinetic limitations imposed by the passivation layer through a triple synergistic mechanism involving mass transfer enhancement, passivation inhibition, and -OH path regulation. Full article
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