For the first time, we report in situ exfoliated titanate nanosheet-supported silver nanoparticles (AgNPs) toward environmental sustainability through rapid catalytic reduction of p-nitrophenol (4-NP), organic dyes for decoloration, as well as by inhibiting the growth of microbes. The ternary nanocomposite hydrogel has been synthesized through stabilization of an anionically charged titanate sheet by threedimensional amino-functionalized chemically cross-linked amylopectin for proper growth and stabilization of AgNPs. Here, titanate nanosheets act as an excellent solid support for proper fabrication of AgNPs that could restrict its agglomeration and rapid leaching of AgNPs from the ternary nanocomposite hydrogel. The structural confirmation as well as the stability of titanate nanosheets along with AgNPs have been studied using various characterization techniques. The preparaed nanocomposite hydrogel demonstrates excellent catalytic efficacy and recycling ability toward rapid reduction of toxic 4-NP and decoloration of organic dyes. Notably, the complete reduction of 4-NP could be accomplished within 16 s using 5 mg of as synthesized cl-AP/exf.LT-AgNPs in the presence of excess NaBH 4 . The excellent catalytic efficiency of the ternary nanocomposite hydrogel arises from the synergistic effects of cross-linked amylopectin stabilized titanate nanosheets and in situ fabrication of AgNPs. Moreover, the strong bactericidal activity (3.2 mg/mL for 10 7 cells/mL of Escherichia coli and Bacillus subtilis) of the ternary nanocomposite hydrogel would overcome the limitations for removal of water-soluble organic pollutants and microbial contaminants owing to future perspective on environmental sustainability.

No abstract

A novel composite has recently been synthesized by in situ carbon dots (CDs) deposited functionalized chitosan (polypyrrole grafted chitosan) with improved photocatalytic activity toward degradation of toxic 2-chloro phenol (2-CP) into small compounds. The CDs has been prepared using waste watermelon seeds. Various advanced characterization techniques have been performed to confirm the development of copolymer and composite. In situ incorporation of CDs on the copolymer not only enhanced the photocatalytic rate but also make the composite system an efficient photocatalyst under solar light irradiation.

No abstract

Recently, we have developed a novel nanocomposite [cl‐Ch‐p(DEAEM)/Au] comprised of in‐situ deposition on AuNPs on cationically functionalized chitosan (in presence of chemical crosslinker) and its potential application towards efficient photocatalytic degradation of Reactive Black 5 (RB 5) and Congo red (CR) dyes under exposure of sunlight. The physical, morphological and structural properties of nanocomposite have been characterised using UV‐Vis, FT‐IR, 1H and 13C NMR, PL, FESEM, TEM, EDAX, TGA, XRD, LC–MS and Zeta potential analyses. Here, it has been observed that the nanocomposite can remove both RB 5 and CR dyes rapidly and efficiently through adsorption, followed by photocatalytic degradation under exposure of sunlight. Besides, the adsorbed dyes have been isolated effectively and the nanocomposite has been regenerated in presence of sunlight just by altering the pH of the media and could be reusable for at least 4 times without remarkable decrease in its efficacy.