Effect of oxidants on photoelectrocatalytic decolourization using α-Fe₂O₃/TiO₂/activated charcoal plate nanocomposite under visible light

Abstract

Effect of oxidants on the decolourization efficiency of Lanasol Yellow 4G in photoelectrocatalytic process using α-Fe2O3/TiO2/ACP nanocomposite under visible light.

Synthesis of GO supported Fe2O3–TiO2 nanocomposites for enhanced visible-light photocatalytic applications

“…The C 1s peak can be deconvoluted into three main components corresponding to carbon atoms in different functional groups (Fig. 19,22 As shown in Fig. The non-oxygenated ring carbon (C-C bond, 284.8 eV), the C in C-O bonds (286.4 eV), and the carbonyl C (CvO, 288.7 eV) of GO.…”

“…The non-oxygenated ring carbon (C-C bond, 284.8 eV), the C in C-O bonds (286.4 eV), and the carbonyl C (CvO, 288.7 eV) of GO. 17,19,22 The absorption edge of the ternary composite samples (Fe 2 O 3 -TiO 2 /GO) increases with increasing GO loading, reaches a maximum absorption (468 nm, 2.64 eV) at 1.0% GO, and then decreases on further GO addition to 10% (462 nm, 2.68 eV). Moreover, the carbon-oxygen species in GO could serve as active sites for interactions between TiO 2 and Fe 2 O 3 .…”

“…9 Many methods have been used to enhance the photocatalytic activity of Fe 2 O 3 , including surface alteration, metal/nonmetal doping, and coupling with another semiconductor. 22,23 Nevertheless, this composite also suffers from a small surface area and a low quantum efficiency. It is therefore highly desirable to couple Fe 2 O 3 with a semiconductor that has a lower conduction band (CB) edge to achieve transfer of photoexcited electrons under visible light, to retard charge recombination.…”

“…Recently, activated carbon has been used for charge transport between Fe 2 O 3 and a coupled semiconductor. 22,23 Nevertheless, this composite also suffers from a small surface area and a low quantum efficiency. Therefore, hybridizing Fe 2 O 3 with a suitable support may address this issue, and improve the photocatalytic activity.…”

Treatment of textile wastewater under visible LED lamps using CuO/ZnO nanoparticles immobilized on scoria rocks

“…In this research, ZnO has been selected as photocatalyst because of its high catalytic efficiency, low cost, and non-toxic nature. It is of high importance to separate the electron-hole pairs to increase photon efficiency by reducing electron-hole recombination and to produce visible-light-active photocatalysts [5][6][7] . UV light constitutes less than 5% of solar irradiation while visible light constitutes more than 43% 4 .…”