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

Abstract

With an increasing global usage of dyes and colorants in various industries, the increase in dye contamination level in water has frequently reported. Developments of appropriate techniques for the degradation of dyes in industrial wastewater are critical and urgently required. Utilization of low-cost materials for the treatment of various dyes using an alternative driving energy could be promising in near future. In the study, activated carbon (AC) was prepared using agricultural waste (coconut shell) and utilized for designing the CeO 2 /AC composites using soft chemical route. The effect of AC on the composite was studied by varying the AC and CeO 2 weight ratios, and as-prepared photocatalytic composites were characterized using suitable analytical techniques. Characterization results clearly indicated a remarkable impact of AC on porosity and surface area, surface morphology, structural and textural properties and photocatalytic activities of the composites. Complete removal of industrial dyes used in aqueous media was observed and 91.3% of degradation efficiency of organic pollutants in real-time textile industrial wastewater within 5 h under LED light source. Reusability study clearly indicated that CeO 2 / AC composites could be reused up to three cycles for the removal of organic pollutants and dyes in aqueous media under visible light source as an alternative driving energy.

Biogenic and chemically synthesized Solanum tuberosum peel–silver nanoparticle hybrid for the ultrasonic aided adsorption of bromophenol blue dye

“…This is attributed to their high selectivity, efficient active sites, high surface area to mass ratio, high adsorption capacity and catalytic activity 41 , 42 . However, due to the difficulty in separating the metallic nanoparticles from solution, instead the impregnation of these nanoparticles onto suitable adsorbent substrate to form hybrid materials has gained significant attention recently 43 , 44 . This impregnation of metallic nanoparticles onto adsorbents has been found to enhance the trapping of contaminants from water 45 , 46 .…”

Biosorption of cationic Hg2+ and Remazol brilliant blue anionic dye from binary solution using Gelidium corneum biomass

“…It was reported that the absorption bands due to C–O stretching appeared at ν = 1167, and 1106 cm −1 as cited by Aghazadeh and Nikpassand 81 . Besides, the absorption bands at ν = 1031 (strong S=O stretching) 82 , 880 (strong C–H binding “1,2,4-trisubstituted”), 778 (strong C–H binding “1,2,3-trisubstituted”), 731 (strong C–H binding “1,2-disubstituted”) 83 , 669 (strong C–halogen “halogen = Cl, Br or I” “halogenated compound”) 84 , 605 (phosphate) 85 , 532 and 456 (two bi-phenyl rings “conjugated”) 86 .…”