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Photoremediation of toxic dye from aqueous environment using monometallic and bimetallic quantum dots based nanocomposites

2017; Elsevier BV; Volume: 172; Linguagem: Inglês

10.1016/j.jclepro.2017.11.122

1879-1786

Gaurav Sharma, Anuj Kumar, Mu. Naushad, Amit Kumar, Ala’a H. Al‐Muhtaseb, Pooja Dhiman, Ayman A. Ghfar, Florian J. Stadler, Mohammad Rizwan Khan,

Nanomaterials for catalytic reactions

Iron nanoparticles (Fe NPs), monometallic [email protected] quantum dots ([email protected]) and bimetallic Fe/[email protected] quantum dots (Fe/[email protected]) 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, [email protected] MNCs and Fe/[email protected] BMNCs, respectively.