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Photocatalytic degradation of indigo carmine using [Zn-Al] LDH supported on PAN nanofibres
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Funktionella material, FNM.ORCID-id: 0000-0001-6288-7709
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Funktionella material, FNM.ORCID-id: 0000-0003-4976-862X
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2015 (Engelska)Ingår i: Clay minerals, ISSN 0009-8558, E-ISSN 1471-8030, Vol. 50, nr 2, s. 185-197Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Zn-Al layered double hydroxides (LDH), before and after calcination, were tested for the removal of indigo carmine (IC) dye from solution. These LDH photocatalysts were characterized by powder x-ray diffraction (PXRD), Fourier transform infrared (FTIR) spectroscopy, thermogravimetry/differential thermogravimetry (TG/DTG), nitrogen physisorption at -196 degrees C, scanning electron microscopy (SEM) and diffuse reflectance spectrophotometry (DRS). The different photocatalysts were supported on polyacrylonitrile (PAN) nanofibres, so that filtration was unnecessary. The PXRD and FTIR analyses showed that the IC adsorption on c-Zn-Al-3-500 (LDH calcined at 500 degrees C) was enhanced by construction of the hydrotalcite matrix intercalated with the dye. The intercalation was clearly evidenced by the appearance of a peak at low degrees 2 theta values. All of the materials prepared exhibited photocatalytic activity, which for the c-Zn-Al-3-500 was comparable to that of commercial PAN-supported ZnO nanoparticles (100% degradation after 180 min). Kinetic studies showed that the degradation of the IC followed a pseudo-first order rate. The high activity and the ease of both synthesis and separation processes rendered this photocatalyst a promising candidate for environmental remediation.

Ort, förlag, år, upplaga, sidor
Mineralogical Society , 2015. Vol. 50, nr 2, s. 185-197
Nyckelord [en]
[Zn-Al] LDH, nanofibres, indigo carmine, retention, photocatalysis
Nationell ämneskategori
Mineral- och gruvteknik Geoteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-176381DOI: 10.1180/claymin.2015.050.2.03ISI: 000362443900003Scopus ID: 2-s2.0-84946056613OAI: oai:DiVA.org:kth-176381DiVA, id: diva2:867027
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QC 20151104

Tillgänglig från: 2015-11-04 Skapad: 2015-11-03 Senast uppdaterad: 2024-03-15Bibliografiskt granskad

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Uheida, AbdusalamMuhammed, Mamoun

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