Photocatalytic Activity of ZnxMn3−xO4 Oxides and ZnO Prepared From Spent Alkaline Batteries
Oxides with ZnxMn3−xO4 stoichiometries and ZnO were synthesized from the “black mass” material recovered from spent alkaline batteries. The oxides were characterized by XRF, XRD with Rietveld refinement, SEM, and TEM methods. Optical characterization included diffuse reflectance (DRS) and photolumin...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2020-08-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fchem.2020.00661/full |
| _version_ | 1818968998414385152 |
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| author | Lorena Alcaraz Eva Jiménez-Relinque Lorenzo Plaza Irene García-Díaz Marta Castellote Félix A. López |
| author_facet | Lorena Alcaraz Eva Jiménez-Relinque Lorenzo Plaza Irene García-Díaz Marta Castellote Félix A. López |
| author_sort | Lorena Alcaraz |
| collection | DOAJ |
| description | Oxides with ZnxMn3−xO4 stoichiometries and ZnO were synthesized from the “black mass” material recovered from spent alkaline batteries. The oxides were characterized by XRF, XRD with Rietveld refinement, SEM, and TEM methods. Optical characterization included diffuse reflectance (DRS) and photoluminescence (PL) measurements. ZnO presented a clear band edge in the UV region, and PL signals were detected. The Zn/Mn oxides showed strong absorption in the UV region and a continuous absorption band in the Vis-IR regions. There is a non-detected PL signal due to excited charges being trapped on sub-band energy states and/or transfer by non-radiative paths. Photocatalytic activity under both irradiation conditions was evaluated using the resazurin dye test, terephthalic acid fluorescence probe method, and NOx air purification evaluation. In the three photoactivity tests, ZnO performed well under both UV and Vis irradiation, whereas no evidence of any appreciable photocatalytic activity was observed for the Zn/Mn oxides. The results are discussed in terms of the findings of previously reported optical measurements. |
| first_indexed | 2024-12-20T14:13:36Z |
| format | Article |
| id | doaj.art-ad95da1d60e04e69a71dbb4f891a7969 |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-12-20T14:13:36Z |
| publishDate | 2020-08-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Chemistry |
| spelling | doaj.art-ad95da1d60e04e69a71dbb4f891a79692022-12-21T19:38:06ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462020-08-01810.3389/fchem.2020.00661552380Photocatalytic Activity of ZnxMn3−xO4 Oxides and ZnO Prepared From Spent Alkaline BatteriesLorena Alcaraz0Eva Jiménez-Relinque1Lorenzo Plaza2Irene García-Díaz3Marta Castellote4Félix A. López5National Center for Metallurgical Research (CENIM-CSIC), Madrid, SpainInstitute of Construction Science, “Eduardo Torroja” (IETcc-CSIC), Madrid, SpainInstitute of Construction Science, “Eduardo Torroja” (IETcc-CSIC), Madrid, SpainNational Center for Metallurgical Research (CENIM-CSIC), Madrid, SpainInstitute of Construction Science, “Eduardo Torroja” (IETcc-CSIC), Madrid, SpainNational Center for Metallurgical Research (CENIM-CSIC), Madrid, SpainOxides with ZnxMn3−xO4 stoichiometries and ZnO were synthesized from the “black mass” material recovered from spent alkaline batteries. The oxides were characterized by XRF, XRD with Rietveld refinement, SEM, and TEM methods. Optical characterization included diffuse reflectance (DRS) and photoluminescence (PL) measurements. ZnO presented a clear band edge in the UV region, and PL signals were detected. The Zn/Mn oxides showed strong absorption in the UV region and a continuous absorption band in the Vis-IR regions. There is a non-detected PL signal due to excited charges being trapped on sub-band energy states and/or transfer by non-radiative paths. Photocatalytic activity under both irradiation conditions was evaluated using the resazurin dye test, terephthalic acid fluorescence probe method, and NOx air purification evaluation. In the three photoactivity tests, ZnO performed well under both UV and Vis irradiation, whereas no evidence of any appreciable photocatalytic activity was observed for the Zn/Mn oxides. The results are discussed in terms of the findings of previously reported optical measurements.https://www.frontiersin.org/article/10.3389/fchem.2020.00661/fullZn/Mn binary oxideZnOspent alkaline batteriesphotocatalysisUV and Vis irradiation |
| spellingShingle | Lorena Alcaraz Eva Jiménez-Relinque Lorenzo Plaza Irene García-Díaz Marta Castellote Félix A. López Photocatalytic Activity of ZnxMn3−xO4 Oxides and ZnO Prepared From Spent Alkaline Batteries Frontiers in Chemistry Zn/Mn binary oxide ZnO spent alkaline batteries photocatalysis UV and Vis irradiation |
| title | Photocatalytic Activity of ZnxMn3−xO4 Oxides and ZnO Prepared From Spent Alkaline Batteries |
| title_full | Photocatalytic Activity of ZnxMn3−xO4 Oxides and ZnO Prepared From Spent Alkaline Batteries |
| title_fullStr | Photocatalytic Activity of ZnxMn3−xO4 Oxides and ZnO Prepared From Spent Alkaline Batteries |
| title_full_unstemmed | Photocatalytic Activity of ZnxMn3−xO4 Oxides and ZnO Prepared From Spent Alkaline Batteries |
| title_short | Photocatalytic Activity of ZnxMn3−xO4 Oxides and ZnO Prepared From Spent Alkaline Batteries |
| title_sort | photocatalytic activity of znxmn3 xo4 oxides and zno prepared from spent alkaline batteries |
| topic | Zn/Mn binary oxide ZnO spent alkaline batteries photocatalysis UV and Vis irradiation |
| url | https://www.frontiersin.org/article/10.3389/fchem.2020.00661/full |
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