Photocatalytic degradation of indigo carmine using [Zn-Al] LDH supported on PAN nanofibres
2015 (English)In: Clay minerals, ISSN 0009-8558, E-ISSN 1471-8030, Vol. 50, no 2, 185-197 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
[Abderrazek, K.; Srasra, N. Frini; Srasra, E.] Natl Res Ctr Mat Sci, Soliman, Tunisia. [Uheida, A.; Muhammed, M.] Royal Inst Technol KTH, Funct Mat Div, Stockholm, Sweden. [Seffen, M.] 4011 Hammam Sousse Sousse Univ, Lab Energy & Mat LABEM, High Sch Sci & Technol, Sousse, Tunisia. [Abderrazek, K.; Srasra, N. Frini] Tunis El Manar Univ, Fac Sci Tunis, El Manar, Tunisia., 2015. Vol. 50, no 2, 185-197 p.
[Zn-Al] LDH, nanofibres, indigo carmine, retention, photocatalysis
Mineral and Mine Engineering Geotechnical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-176381DOI: 10.1180/claymin.2015.050.2.03ISI: 000362443900003ScopusID: 2-s2.0-84946056613OAI: oai:DiVA.org:kth-176381DiVA: diva2:867027
QC 201511042015-11-042015-11-032015-11-04Bibliographically approved