Fabrication of a Nanosize Hematite Pigment via Waste Ferrous Sulfate Recycling Using Sulfur Reduction

Nanometer-sized hematite was prepared via a two-step process. In the first step, FeSO 4 ·7H 2 O was oxidized to Fe 2 (SO 4 ) 3 by oxygen in an acidic solution. In the second step, the Fe 2 (SO 4 ) 3 was reduced to nanosize hematite with sulfur vapor at 550 °C. The hematite has good thermal stability...

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Bibliographic Details
Published in:Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2023-02, Vol.54 (1), p.22-28
Main Authors: Wang, Ye, Ren, Genkuan, Jiang, Bing, Yang, Lin, Zhang, Zhiye, Wang, Xinlong, Zhong, Yanjun, Chen, Zhiyuan, Yang, Xiushan, Morita, Kazuki, Ma, Wenhui
Format: Article
Language:English
Subjects:
Acidic oxides
Brief Communication
Characterization and Evaluation of Materials
Chemical engineering
Chemistry and Materials Science
Emulsion paint
Energy consumption
Hematite
Iron oxides
Iron sulfates
Materials Science
Metallic Materials
Nanoparticles
Nanotechnology
Red pigments
Structural Materials
Sulfur
Sulfuric acid
Surfaces and Interfaces
Thermal stability
Thin Films
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Summary:Nanometer-sized hematite was prepared via a two-step process. In the first step, FeSO 4 ·7H 2 O was oxidized to Fe 2 (SO 4 ) 3 by oxygen in an acidic solution. In the second step, the Fe 2 (SO 4 ) 3 was reduced to nanosize hematite with sulfur vapor at 550 °C. The hematite has good thermal stability up to 500 °C and good colloid stability in water-based paint. Its properties satisfy the requirements of the international standard ISO 1248-A-I-1-a for an iron oxide red pigment. Graphical abstract
ISSN:1073-5615
1543-1916
DOI:10.1007/s11663-022-02584-5