Green Synthesis of TEMPO@DFNS-Li2MnO3 Ceramic Nanostructures and Their Application as Photocatalysts Under Visible–UV Light for Removal of Organic Dyes in Water

Anchoring 2,2,6,6-tetra-methylpiperidine-1oxyl radical (TEMPO) in the nanospaces a fibre of dendritic fibrous nanosilica (DFNS) together with Li2MnO3 nanoparticles (NPs) can lead to an unheard potent for the production of bifunctutional nanocatalyst (TEMPO@DFNS-Li2MnO3). The difference in the performance of DFNd2Sn2O7 photocatalyst in the removal of Acid Blue 92, Methyl orange, Acid Brown 214, Acid Black 1, eriochrome black T, and erythrosine under Visible and UV light was compared. Under the distance of TEMPO, catalytic activity in the case of Li2MnO3 nanoparticle is studied in the case of nano and bulk Li2MnO3 structures to removal of organic dyes on a multigram scale in aqueous solution. The analyses of BET, VSM, TGA, XRD, FE-SEM, EDX, UV–Vis, and TEM are used for characterizing the catalyst. The catalyst activity is evaluated considering different components of the catalyst for the synthesis of removal of organic dyes. The reasonable procedures were proposed according to the cooperation among the Li2MnO3 and TEMPO groups NPs sites over the catalyst that can be recovered and then reused without any significant reactivity loss considering at least 10 consecutive turns.