ZnS-CuS nanocomposites act as potential candidate for several applications such as photocatalytic degradation of dyes, microbial fuel cells and photocatalytic hydrogen generation. The synthesis of ZnS-CuS nanocomposites has been reported using several methods including microwave method, cation-exchange reaction, and solvothermal method. The reported methods for the synthesis of ZnS-CuS nanocomposites require longer reaction time (6 - 24 h) and often require stringent conditions. In the present study, the synthesis of ZnS-CuS nanocomposites (ZCS1, ZCS2 and ZCS3) has been carried out at 200 ℃ for 1 h using a novel and cost-effective thermal decomposition method. The characterization was done using various analytical techniques including XRD, FE-SEM, EDX and DRS. The XRD results of ZnS-CuS nanocomposites indicate the presence of ZnS and CuS nanoparticles in the nanocomposites. The FE-SEM results show the presence of agglomerated nanoparticles in pure ZnS, CuS nanoparticles and the ZnS-CuS nanocomposites. Homogeneity of elemental distribution in the ZnS-CuS nanocomposites has been observed using EDX analysis. The DRS results of ZnS-CuS nanocomposites indicate absorption in the UV and visible range of the electromagnetic spectrum. Peroxidase-like activity has been demonstrated by the oxidation of tetramethyl benzidine (substrate) in the presence of H2O2 using ZnS-CuS nanocomposites as the catalyst for the first time. The ZnS-CuS nanocomposites exhibit enhanced peroxidase-like activity as compared to pure ZnS and CuS nanoparticles.

ZnS-CuS nanocomposites act as potential candidate for several applications such as photocatalytic degradation of dyes, microbial fuel cells and photocatalytic hydrogen generation. The synthesis of ZnS-CuS nanocomposites has been reported using several methods including microwave method, cation-exchange reaction, and solvothermal method. The reported methods for the synthesis of ZnS-CuS nanocomposites require longer reaction time (6 - 24 h) and often require stringent conditions. In the present study, the synthesis of ZnS-CuS nanocomposites (ZCS1, ZCS2 and ZCS3) has been carried out at 200 ℃ for 1 h using a novel and cost-effective thermal decomposition method. The characterization was done using various analytical techniques including XRD, FE-SEM, EDX and DRS. The XRD results of ZnS-CuS nanocomposites indicate the presence of ZnS and CuS nanoparticles in the nanocomposites. The FE-SEM results show the presence of agglomerated nanoparticles in pure ZnS, CuS nanoparticles and the ZnS-CuS nanocomposites. Homogeneity of elemental distribution in the ZnS-CuS nanocomposites has been observed using EDX analysis. The DRS results of ZnS-CuS nanocomposites indicate absorption in the UV and visible range of the electromagnetic spectrum. Peroxidase-like activity has been demonstrated by the oxidation of tetramethyl benzidine (substrate) in the presence of H~2~O~2~ using ZnS-CuS nanocomposites as the catalyst for the first time. The ZnS-CuS nanocomposites exhibit enhanced peroxidase-like activity as compared to pure ZnS and CuS nanoparticles.

Synthesis of ZnS-CuS nanocomposites using novel thermal decomposition approach for enhanced peroxidase-like activity

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27th CRSI National Symposium in Chemistry

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