Production of hydrogen, active zerovalent iron and ferroferric oxide octahedron by alkaline etching Al-Fe alloys

Zheng, Tong1; Li, Mingcong1; Chao, Jingbo2; Zhang, Jingqi1; Tang, Yang3; Wan, Pingyu3; Hu, Qing4; Coulon, Frederic5; Bardos, Paul6; Yang, Xiao Jin1

2021-09-15

10.1016/j.matchemphys.2021.124789

MATERIALS CHEMISTRY AND PHYSICS   影响因子和分区

0254-0584

1879-3312

["Hydrogen is becoming important clean energy while zerovalent iron (ZVI) and ferroferric oxide are of great interest to many applications including environmental remediation and chemical catalysis. Here, we report production of hydrogen, zerovalent iron and ferroferric oxide octahedron by etching Al-Fe alloys using NaOH solutions. The rate of hydrogen generation increased with increasing NaOH concentration and the alloy's particle size and decreasing the alloy's Fe concentration. Alkaline etching Al-Fe alloy particles of 425-850 mu m produced 19-53 mu m ZVI particles, which had paralleled ravines of 0.2-0.3 mu m wide on the surface and possessed specific surface areas of 30-70 m2/g. The microscale ZVI was highly active for the removal of a model pollutant acid orange 7 from water. After 3-6 h ageing in the alkaline etching solution, the microscale ZVI particles were transformed to octahedral ferroferric oxide with saturation magnetization of 68.2 emu/g and residual magnetization of 13.2 emu/g and a coercive force of 330 Oe. This study provides a new approach for a facile synthesis of highly active ZVI and octahedral ferroferric oxide along with on-board generation of hydrogen from Al-Fe alloys.","Hydrogen is becoming important clean energy while zerovalent iron (ZVI) and ferroferric oxide are of great interest to many applications including environmental remediation and chemical catalysis. Here, we report production of hydrogen, zerovalent iron and ferroferric oxide octahedron by etching Al-Fe alloys using NaOH solutions. The rate of hydrogen generation increased with increasing NaOH concentration and the alloy's particle size and decreasing the alloy's Fe concentration. Alkaline etching Al-Fe alloy particles of 425-850 mu m produced 19-53 mu m ZVI particles, which had paralleled ravines of 0.2-0.3 mu m wide on the surface and possessed specific surface areas of 30-70 m2/g. The microscale ZVI was highly active for the removal of a model pollutant acid orange 7 from water. After 3-6 h ageing in the alkaline etching solution, the microscale ZVI particles were transformed to octahedral ferroferric oxide with saturation magnetization of 68.2 emu/g and residual magnetization of 13.2 emu/g and a coercive force of 330 Oe. This study provides a new approach for a facile synthesis of highly active ZVI and octahedral ferroferric oxide along with on-board generation of hydrogen from Al-Fe alloys."]

Hydrogen Al-Fe alloys Zerovalent iron Ferroferric oxide octahedron Water treatment

SCI ; EI

英语

其他

Natural Science Foundation of Beijing Municipality[2182050] ; National Natural Science Foundation of China[21506010] ; China Major Science and Technology Program for Water Pollution Control and Treatment[2018ZX07109002]

Materials Science

Materials Science, Multidisciplinary

WOS:000677887700001

ELSEVIER SCIENCE SA

20212410499199

Alkalinity ; Etching ; Hydrogen production ; Iron alloys ; Particle size ; Saturation magnetization ; Sodium hydroxide ; Water pollution

Water Treatment Techniques:445.1 ; Water Pollution:453 ; Gas Fuels:522 ; Iron Alloys:545.2 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Chemistry, General:801.1 ; Chemical Reactions:802.2 ; Inorganic Compounds:804.2

MATERIALS SCIENCE

Web of Science

1.Beijing Univ Chem Technol, Coll Chem Engn, Beijing Key Lab Membrane Sci & Technol, Beijing 100029, Peoples R China
2.Natl Inst Metrol, Chem Metrol & Analyt Sci Div, Beijing 100029, Peoples R China
3.Beijing Univ Chem Technol, Coll Chem, Beijing 100029, Peoples R China
4.Southern Univ Sci & Technol, Shenzhen 518055, Guangdong, Peoples R China
5.Cranfield Univ, Sch Water Energy & Environm, Cranfield MK43 0AL, Beds, England
6.Univ Reading, Reading RG6 6AT, Berks, England

Zheng, Tong,Li, Mingcong,Chao, Jingbo,et al. Production of hydrogen, active zerovalent iron and ferroferric oxide octahedron by alkaline etching Al-Fe alloys[J]. MATERIALS CHEMISTRY AND PHYSICS,2021,270.

Zheng, Tong.,Li, Mingcong.,Chao, Jingbo.,Zhang, Jingqi.,Tang, Yang.,...&Yang, Xiao Jin.(2021).Production of hydrogen, active zerovalent iron and ferroferric oxide octahedron by alkaline etching Al-Fe alloys.MATERIALS CHEMISTRY AND PHYSICS,270.

Zheng, Tong,et al."Production of hydrogen, active zerovalent iron and ferroferric oxide octahedron by alkaline etching Al-Fe alloys".MATERIALS CHEMISTRY AND PHYSICS 270(2021).