α-Fe2O3 Nanoparticles/Vermiculite Clay Material: Structural, Optical and Photocatalytic Properties
Photocatalysis is increasingly becoming a center of interest due to its wide use in environmental remediation. Hematite (α-Fe2O3) is one promising candidate for photocatalytic applications. Clay materials as vermiculite (Ver) can be used as a carrier to accommodate and stabilize photocatalysts. Two...
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| Veröffentlicht in: | Materials 2019-06, Vol.12 (11), p.1880 |
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| creator | Valášková, Marta Tokarský, Jonáš Pavlovský, Jiří Prostějovský, Tomáš Kočí, Kamila |
| description | Photocatalysis is increasingly becoming a center of interest due to its wide use in environmental remediation. Hematite (α-Fe2O3) is one promising candidate for photocatalytic applications. Clay materials as vermiculite (Ver) can be used as a carrier to accommodate and stabilize photocatalysts. Two different temperatures (500 °C and 700 °C) were used for preparation of α-Fe2O3 nanoparticles/vermiculite clay materials. The experimental methods used for determination of structural, optical and photocatalytic properties were X-ray fluorescence (ED-XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive X-ray spectrometry (EDS), N2 adsorption method (BET), diffuse reflectance UV-Vis spectroscopy (DRS), photoluminescence spectroscopy (PL) and photocatalytic reduction of CO2, respectively. The data from XRD were confronted with molecular modeling of the material arrangement in the interlayer space of vermiculite structure and the possibility of anchoring the α-Fe2O3 nanoparticles to the surface and edge of vermiculite. Correlations between structural, textural, optical and electrical properties and photocatalytic activity have been studied in detail. The α-Fe2O3 and α-Fe2O3/Ver materials with higher specific surface areas, a smaller crystallite size and structural defects (oxygen vacancies) that a play crucial role in photocatalytic activity, were prepared at a lower calcination temperature of 500 °C. |
| doi_str_mv | 10.3390/ma12111880 |
| format | Article |
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Hematite (α-Fe2O3) is one promising candidate for photocatalytic applications. Clay materials as vermiculite (Ver) can be used as a carrier to accommodate and stabilize photocatalysts. Two different temperatures (500 °C and 700 °C) were used for preparation of α-Fe2O3 nanoparticles/vermiculite clay materials. The experimental methods used for determination of structural, optical and photocatalytic properties were X-ray fluorescence (ED-XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive X-ray spectrometry (EDS), N2 adsorption method (BET), diffuse reflectance UV-Vis spectroscopy (DRS), photoluminescence spectroscopy (PL) and photocatalytic reduction of CO2, respectively. The data from XRD were confronted with molecular modeling of the material arrangement in the interlayer space of vermiculite structure and the possibility of anchoring the α-Fe2O3 nanoparticles to the surface and edge of vermiculite. Correlations between structural, textural, optical and electrical properties and photocatalytic activity have been studied in detail. The α-Fe2O3 and α-Fe2O3/Ver materials with higher specific surface areas, a smaller crystallite size and structural defects (oxygen vacancies) that a play crucial role in photocatalytic activity, were prepared at a lower calcination temperature of 500 °C.</description><identifier>ISSN: 1996-1944</identifier><identifier>EISSN: 1996-1944</identifier><identifier>DOI: 10.3390/ma12111880</identifier><identifier>PMID: 31212663</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Aqueous solutions ; Atoms & subatomic particles ; Carbon dioxide ; Catalytic activity ; Chemical precipitation ; Clay ; Crystal defects ; Crystallites ; Electrical properties ; Environmental impact ; Ferric oxide ; Hematite ; Interlayers ; Iron ; Lattice vacancies ; Minerals ; Morphology ; Nanoparticles ; Optical properties ; Oxidation ; Photocatalysis ; Photoluminescence ; Radiation ; Vermiculite ; X-ray diffraction ; X-ray fluorescence</subject><ispartof>Materials, 2019-06, Vol.12 (11), p.1880</ispartof><rights>2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). 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Hematite (α-Fe2O3) is one promising candidate for photocatalytic applications. Clay materials as vermiculite (Ver) can be used as a carrier to accommodate and stabilize photocatalysts. Two different temperatures (500 °C and 700 °C) were used for preparation of α-Fe2O3 nanoparticles/vermiculite clay materials. The experimental methods used for determination of structural, optical and photocatalytic properties were X-ray fluorescence (ED-XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive X-ray spectrometry (EDS), N2 adsorption method (BET), diffuse reflectance UV-Vis spectroscopy (DRS), photoluminescence spectroscopy (PL) and photocatalytic reduction of CO2, respectively. The data from XRD were confronted with molecular modeling of the material arrangement in the interlayer space of vermiculite structure and the possibility of anchoring the α-Fe2O3 nanoparticles to the surface and edge of vermiculite. Correlations between structural, textural, optical and electrical properties and photocatalytic activity have been studied in detail. The α-Fe2O3 and α-Fe2O3/Ver materials with higher specific surface areas, a smaller crystallite size and structural defects (oxygen vacancies) that a play crucial role in photocatalytic activity, were prepared at a lower calcination temperature of 500 °C.</description><subject>Aqueous solutions</subject><subject>Atoms & subatomic particles</subject><subject>Carbon dioxide</subject><subject>Catalytic activity</subject><subject>Chemical precipitation</subject><subject>Clay</subject><subject>Crystal defects</subject><subject>Crystallites</subject><subject>Electrical properties</subject><subject>Environmental impact</subject><subject>Ferric oxide</subject><subject>Hematite</subject><subject>Interlayers</subject><subject>Iron</subject><subject>Lattice vacancies</subject><subject>Minerals</subject><subject>Morphology</subject><subject>Nanoparticles</subject><subject>Optical properties</subject><subject>Oxidation</subject><subject>Photocatalysis</subject><subject>Photoluminescence</subject><subject>Radiation</subject><subject>Vermiculite</subject><subject>X-ray diffraction</subject><subject>X-ray fluorescence</subject><issn>1996-1944</issn><issn>1996-1944</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpdUd1qFjEQDaLYUnvjEyx4I-LaJJNNEy8E-bAqVL-CP7dhvuys3ZLdbJOs8D2WL-IzmdLi39zMMHPmzBkOY48FfwFg-cmEQgohjOH32KGwVrfCKnX_r_qAHed8xWsACCPtQ3YAdUdqDYfM__zRnpHcQvMR57hgKqMPlE--UppGv4axULMJuG8-YKE0YnjZfCpp9WVNGJ4326XiMTQ4983FZSzRY8Gwr83mIsWFKh3lR-zBgCHT8V0-Yl_O3nzevGvPt2_fb16ftx4MlBaNJeGtRRjU7tTbToPsrAFCpWwvdoOu-jve9WT6oQPrSWg87QeyVnHVGzhir255l3U3Ue9pLlWkW9I4Ydq7iKP7dzKPl-5b_O605tx2shI8vSNI8XqlXNw0Zk8h4ExxzU5KBR0Xmt_cevIf9Cquaa7vOdkpoy1wxSvq2S3Kp5hzouG3GMHdjX3uj33wCy6jjHA</recordid><startdate>20190611</startdate><enddate>20190611</enddate><creator>Valášková, Marta</creator><creator>Tokarský, Jonáš</creator><creator>Pavlovský, Jiří</creator><creator>Prostějovský, Tomáš</creator><creator>Kočí, Kamila</creator><general>MDPI AG</general><general>MDPI</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0001-6295-8976</orcidid></search><sort><creationdate>20190611</creationdate><title>α-Fe2O3 Nanoparticles/Vermiculite Clay Material: Structural, Optical and Photocatalytic Properties</title><author>Valášková, Marta ; Tokarský, Jonáš ; Pavlovský, Jiří ; Prostějovský, Tomáš ; Kočí, Kamila</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c383t-a89e1c99a3f4b7c956325983ea449d1bf6331505de8df539ce16a7dfe99404d83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Aqueous solutions</topic><topic>Atoms & subatomic particles</topic><topic>Carbon dioxide</topic><topic>Catalytic activity</topic><topic>Chemical precipitation</topic><topic>Clay</topic><topic>Crystal defects</topic><topic>Crystallites</topic><topic>Electrical properties</topic><topic>Environmental impact</topic><topic>Ferric oxide</topic><topic>Hematite</topic><topic>Interlayers</topic><topic>Iron</topic><topic>Lattice vacancies</topic><topic>Minerals</topic><topic>Morphology</topic><topic>Nanoparticles</topic><topic>Optical properties</topic><topic>Oxidation</topic><topic>Photocatalysis</topic><topic>Photoluminescence</topic><topic>Radiation</topic><topic>Vermiculite</topic><topic>X-ray diffraction</topic><topic>X-ray fluorescence</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Valášková, Marta</creatorcontrib><creatorcontrib>Tokarský, Jonáš</creatorcontrib><creatorcontrib>Pavlovský, Jiří</creatorcontrib><creatorcontrib>Prostějovský, Tomáš</creatorcontrib><creatorcontrib>Kočí, Kamila</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>Materials Science Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Valášková, Marta</au><au>Tokarský, Jonáš</au><au>Pavlovský, Jiří</au><au>Prostějovský, Tomáš</au><au>Kočí, Kamila</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>α-Fe2O3 Nanoparticles/Vermiculite Clay Material: Structural, Optical and Photocatalytic Properties</atitle><jtitle>Materials</jtitle><date>2019-06-11</date><risdate>2019</risdate><volume>12</volume><issue>11</issue><spage>1880</spage><pages>1880-</pages><issn>1996-1944</issn><eissn>1996-1944</eissn><abstract>Photocatalysis is increasingly becoming a center of interest due to its wide use in environmental remediation. Hematite (α-Fe2O3) is one promising candidate for photocatalytic applications. Clay materials as vermiculite (Ver) can be used as a carrier to accommodate and stabilize photocatalysts. Two different temperatures (500 °C and 700 °C) were used for preparation of α-Fe2O3 nanoparticles/vermiculite clay materials. The experimental methods used for determination of structural, optical and photocatalytic properties were X-ray fluorescence (ED-XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive X-ray spectrometry (EDS), N2 adsorption method (BET), diffuse reflectance UV-Vis spectroscopy (DRS), photoluminescence spectroscopy (PL) and photocatalytic reduction of CO2, respectively. The data from XRD were confronted with molecular modeling of the material arrangement in the interlayer space of vermiculite structure and the possibility of anchoring the α-Fe2O3 nanoparticles to the surface and edge of vermiculite. Correlations between structural, textural, optical and electrical properties and photocatalytic activity have been studied in detail. The α-Fe2O3 and α-Fe2O3/Ver materials with higher specific surface areas, a smaller crystallite size and structural defects (oxygen vacancies) that a play crucial role in photocatalytic activity, were prepared at a lower calcination temperature of 500 °C.</abstract><cop>Basel</cop><pub>MDPI AG</pub><pmid>31212663</pmid><doi>10.3390/ma12111880</doi><orcidid>https://orcid.org/0000-0001-6295-8976</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Aqueous solutions Atoms & subatomic particles Carbon dioxide Catalytic activity Chemical precipitation Clay Crystal defects Crystallites Electrical properties Environmental impact Ferric oxide Hematite Interlayers Iron Lattice vacancies Minerals Morphology Nanoparticles Optical properties Oxidation Photocatalysis Photoluminescence Radiation Vermiculite X-ray diffraction X-ray fluorescence |
| title | α-Fe2O3 Nanoparticles/Vermiculite Clay Material: Structural, Optical and Photocatalytic Properties |
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