Chicken Egg Shell Waste Derived Calcium Oxide Based Nanohybrid For Rapid Removal of Heavy Metal Ions from Water: Green Synthesis, Kinetics and Reusability. Issue 16 (24th April 2023)

• Record Type: Journal Article
• Authors: Rani, Manviri; Keshu, ; Usha, ; Shanker, Uma
• Is Part Of: ChemistrySelect. Volume 8:Issue 16(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-04-24
• Subjects: Green Synthesis -- Heavy metal removal -- Nanoparticle -- Photocatalysis -- SnO2@CaO nanohybrid; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202203540
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: The carcinogenic metal ions chromium (Cr +6 ) and lead (Pb +2 ) are prominent water pollutants. To substantiate this, green synthesized SnO2 nanoparticle (using S. mukorossi extract) was coupled with egg shell derived CaO nanocrystals. Crystalline nature of synthesized catalyst confirmed by PXRD and microscopic study revealed spherical SnO2 decorated on the irregular surface of CaO. Synthesized nanohybrid followed adsorption and photocatalytic reduction (Cr +6 to Cr +3 ; Pb +2 to Pb 0 ) (Cr +6 : 94 %; Pb +2 : 88 %) phenomenon. Synergism of CaO (51.9 m 2 g −1 ; 2.9 eV) and SnO2 (13.3 m 2 g −1 ; 3.15 eV) was resulted into plenty of surface area (91.9 m 2 g −1 ), low band gap (2.4 eV), and semiconducting nature of nanohybrid. As compared to Pb +2 removal of Cr +6 was faster due to higher value of reduction potential [Cr +6 /Cr +3 (1.35 eV); Pb +2 /Pb 0 (−0.1262 eV)]. Photocatalyst proved to be effective upto 10 th cycle. SnO2 @CaO nanohybrid might be considered a potential photocatalyst in industries with sustainable approach. Abstract : The green synthesized SnO2 coupled with CaO nanoparticle synthesized using waste peels of egg shells. The biocompatible SnO2 @CaO nanohybrid used for the removal of toxic metal ions chromium (Cr +6 ) and lead (Pb +2 ) via adsorption followed by photo‐reduction phenomenon in presence of sunlight. The synthesized photocatalyst proved to be effective upto 10 th cycle.