Photoremediation of toxic dye from aqueous environment using monometallic and bimetallic quantum dots based nanocomposites
Khan, Gaurav Sharma, Anuj Kumar, Mu Naushad, Amit Kumar, Ala'a H. Al-Muhtaseb, Pooja Dhiman, Ayman A. Ghfar, Florian J. Stadler, M.R. . 2018
Iron nanoparticles (Fe NPs), monometallic Fe@carbon quantum dots (Fe@CQDs) and bimetallic Fe/
Ag@carbon quantum dots (Fe/Ag@CQDs) nanocomposites were prepared by simple co-precipitation/
reduction method. The nanoparticles (NPs), monometallic nanocomposite (MNCs) and bimetallic
nanocomposite (BMNCs) were characterized using various techniques. The adsorptional/photocatalytic
activity of NPs, MNCs, and BMNCs were investigated for the removal of fast green (FG) dye from aqueous
medium. The degradation of FG dye under combined adsorptional/photocatalytic condition was efficient.
The catalytic nature of synthesized NPs, MNCs and BMNCs was also explored for the oxidation of benzyl
alcohol and esterification of acetic acid. For oxidation of benzyl alcohol with H2O2 in the presence of
acetonitrile (ratio of butyl alcohol: H2O2 was 2:1) at temperature 80 C, the Fe NPs gave maximum yield
(87%). The esterification of acetic acid with ethyl, isopropyl and butyl alcohol showed that butyl alcohol
gave maximum yield of 82%, 80%, and 84% for Fe NPs, Fe@CQDs MNCs and Fe/Ag@CQDs BMNCs,
respectively.
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