Efficient Recycling Blast Furnace Slag by Constructing Ti-Embedded Layered Double Hydroxide as Visible-Light-Driven Photocatalyst
Autor: | Ningning Song, Yongfeng Cai, Lingmin Sun, Peng Hu, Qinqin Zhou, Junshu Wu, Jinshu Wang |
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Jazyk: | angličtina |
Rok vydání: | 2022 |
Předmět: |
titanium-containing blast furnace slag
layered double hydroxide Ti-embedding visible light response photocatalysis Technology Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 |
Zdroj: | Materials, Vol 15, Iss 4, p 1514 (2022) |
Druh dokumentu: | article |
ISSN: | 15041514 1996-1944 |
DOI: | 10.3390/ma15041514 |
Popis: | In this work, a strategy of heat treatment-precipitation has been developed to recycle Ti-containing metallurgical solid waste by forming Ti-embedded MgAl layered double hydroxide (TMA-LDH). This facile and simple route is featured by the dedicated utilization of the composition of slag with high overall recovery efficiency. Importantly, as-obtained product exhibits visible light response distinctly different from that of pristine MA-LDH ascribed to the Fe doping inherited from initial slag. Its mesoporous nanostructure also provides more microchannels for mass and carrier transfer. As such, excellent photocatalytic activity towards degradation of tetracycline hydrochloride is achieved, and 88% removal could be obtained in 60 min. Furthermore, 44% increase in efficiency than that of Ti-excluded LDH also indicates the synergistically promoting effect of Ti incorporation. Mechanism investigation suggests that Ti incorporation regulates the electronic structure of pristine LDH with more active sites, and favors the formation of radicals with improved oxidative ability for photocatalysis. |
Databáze: | Directory of Open Access Journals |
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