Recycling blast furnace dust into metals (Al, Zn and Ti)-doped hematite with enhanced photocatalytic activity

•A dust-derived metals-doped α-Fe2O3 is built for waste cleaning waste.•Dopants (Zn, Al and Ti) and Fe for doped α-Fe2O3 are all recovered from the dust.•Appropriate co-doping of Zn, Al and Ti enhance photocatalytic activity of α-Fe2O3.•Dust-derived α-Fe2O3 delivers superior gradation rate of MB tha...

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Published inJournal of environmental chemical engineering Vol. 4; no. 1; pp. 341 - 345
Main Authors Wu, Zhao-Jin, Wang, Lu-Chuang, Gao, Zhi-Fang, Liu, Wei-Ming, Wu, Xing-Rong
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.03.2016
Subjects
Blast furnace dust
Doping
Hematite
Photodegradation
Recycling
Hematite
Photodegradation
Recycling
Blast furnace dust
Doping
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Summary:•A dust-derived metals-doped α-Fe2O3 is built for waste cleaning waste.•Dopants (Zn, Al and Ti) and Fe for doped α-Fe2O3 are all recovered from the dust.•Appropriate co-doping of Zn, Al and Ti enhance photocatalytic activity of α-Fe2O3.•Dust-derived α-Fe2O3 delivers superior gradation rate of MB than pristine one. Metals (Al, Zn, Ti)-doped hematite is prepared from blast furnace dust through sulfolysis and hydrothermal processes, where all the Fe and dopants (Al, Zn and Ti) are recovered from the dust without any chemical agents as start materials. Results indicate that the dust-derived hematite shows an enhanced methylene-blue’s photodegradation rate of 72.2% than the pristine one within 150min under simulated sunlight illumination, owing to the appropriate co-doping of the dust-derived metals to α-Fe2O3.
ISSN:2213-3437
2213-3437
DOI:10.1016/j.jece.2015.11.030