SnLa2O5 wrapped carboxymethyl cellulose mixed calcium alginate nanocomposite beads for efficient reduction of pollutants
Kalsoom Akhtar, Esraa M. Bakhsh, Sher Bahadar Khan, Mansoor Khan, Abdullah M. Asiri
Abstract
In this project, lanthanum oxide doped tin oxide (SnLa 2 O 5 ) nanomaterial was prepared and characterized morphologically and physiochemically by different techniques. The catalytic performance of SnLa 2 O 5 was assessed toward catalytic reduction of 4-nitrophenol (4-NP), methyl orange (MO), congo red (CR), methylene blue (MB) and potassium ferricyanide (K 3 [Fe(CN) 6 ]). SnLa 2 O 5 was found to be efficient for K 3 [Fe(CN) 6 ] in the presence of NaBH 4 , which reduced in only 8.0 min. SnLa 2 O 5 was further wrapped in carboxymethyl cellulose mixed calcium alginate (CMC-Alg) hydrogel beads because the powder catalyst cannot be simply recovered from reaction media to recycle and use again. SnLa 2 O 5 wrapped CMC-Alg (SnLa 2 O 5 /CMC-Alg) was assessed for detail analysis of K 3 [Fe(CN) 6 ] reduction. The effect of NaBH 4 , K 3 [Fe(CN) 6 ] concentration and amount of catalyst was optimized using SnLa 2 O 5 /CMC-Alg. The amount of catalyst has positive impact on catalytic reduction of K 3 [Fe(CN) 6 ]. The kinetic study revealed that K 3 [Fe(CN) 6 ] reduction by SnLa 2 O 5 and SnLa 2 O 5 /CMC-Alg was fast, which completed in 8.0 and 4.0 min with rate constant of 0.4283 min −1 and 0.7461 min −1 , respectively. These findings indicated that the developed SnLa 2 O 5 /CMC-Alg is best and proficient nanocatalyst for K 3 [Fe(CN) 6 ] reduction. The efficiency along with cost-effective and simple treatment route of the developed nanocatalyst have prospect to compete and replace the reputable commercial catalysts.