Effect of nanosized CeO₂ or ZnO loading on adsorption and catalytic properties of activated carbon

Abstract

This graphical abstract describes in general the treatment processes of dye-polluted water using the prepared samples. Activated carbon undergoes both adsorption and catalytic oxidation processes, further the photocatalytic efficiency of each catalyst supported by activated carbon enhanced the removal of dye completely in a short time in addition to adsorption process in the early irradiation time.

Multi‐walled carbon nanotubes supported amorphous Fe2O3 and Ag2O–Fe2O3 as Fenton catalysts for degradation of maxilon red dye

“…In the first stage, the removal of dye is attained rapidly and somewhat less quickly in the second one. By comparing to a previous study, the photodegradation and wet catalytic peroxide oxidation of MR dye using CeO 2 ‐activated carbon and ZnO‐activated carbon were found to be lower than that obtained using Fe 2 O 3 /MWCNTs and Ag 2 O–Fe 2 O 3 /MWCNTs. Thus, the prepared composites are very valuable catalysts for the decomposition of MR dye molecules in their wastewater discharges.…”

“…Basic Red 46 (CAS#61847‐54‐9) was obtained from Best Chem. Co., Germany . The chemical formula of MR 3GL is C 18 H 23 BrN 6 [(1H‐1,2,4‐Triazolium,1,4‐dimethyl‐5‐[[4‐[methyl(phenylmethyl)amino]phenyl]azo]‐, bromide)] and its molecular weight 403.3194 g/mol.…”

“…Recently, advanced oxidation processes (AOPs) carried out using eco‐friendly hydrogen peroxide as an oxidant reagent which forms hydroxyl radicals with high strong oxidation potential ( E 0 = 2.80 V) in the presence of metal oxide catalysts such as CuO, MnO 2 , ZnO, and CeO 2 or zero‐valent metal (e.g., Ni) supported on carbon materials have received much interest in the recent years. Therefore, the AOPs are very efficient for the degradation of several organic contaminants coexisted in wastewater, in particular, which are difficult to break up by conventional methods.…”

Preparation and characterization of cost-effective AC/CeO2 nanocomposites for the degradation of selected industrial dyes

“…The band observed at 1625 cm −1 is assigned to stretching vibration of C=O bond in carbonyl group. The absorption bands of phosphorous-containing groups (e.g., P=O, P-O-P, P=OOH, P-O-C) and C-O groups are located between 1300 and 1000 cm −1 (Puziy et al 2002;Bandosz and Ania 2006;El-Khouly et al 2017), respectively. The formation of various functional carbonylic and alcoholic groups can be observed at 3430 cm −1 (-OH), 1625 cm −1 (COOH) and 1082 cm −1 (C-O) (El-Khouly et al 2017), indicating that the fictionalization process has been effectively taken place.…”

“…In the case of CeO 2 , the characteristic peak of Ce-O bond appears at around 450 cm −1 , whereas in the case of composite it has been shifted to 461 cm −1 . The shift may be due to the formation of chemical bond between cerium and AC through oxygen-containing groups (Gupta and Saleh 2011a, b;Irajiboroujeni et al 2016;El-Khouly et al 2017). During the synthesis of composite, strong interactions between metal oxide and ACs have formed, which may be a plausible reason for the enhanced physical and chemical properties of the synthesized composite.…”