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Bio-mediated Synthesis of ZnS–ZnO Nanocomposite from Cucumis melo Pulp and Chicken Feathers: Photodegradation of Dyes and Antibacterial Activities
Abstract
An innovative way was found for the synthesis of effi cient photocatalyst in the form of ZnS–ZnO nanocomposite from
Cucumis melo pulp and chicken feather powder as a source of fuel and oxygen and sulfur, respectively, by combustion
followed by hydrothermal method and is reported in this work. Diff erent analytical techniques are employed, such as
XRD, SEM, TEM, PL EDS, FT-IR, DRS, and EIS techniques for structural, morphological, optical, and electrochemical
properties. The SEM analysis confi rmed ZnS–ZnO nanocomposite formation. The XRD data of ZnS–ZnO nanocomposite
resembled pure crystalline ZnO and ZnS nanoparticles. DRS confi rmed the band gap of the synthesized material, which
was calculated using a K-M plot and found to be 3.29 eV, 3.38 eV, and 3.12 eV for ZnO, ZnS nanoparticles, and ZnS-ZnO
nanocomposite, respectively. The synthesized ZnS–ZnO nanocomposite showed enhanced photocatalytic activity towards
MB [92%], RhB [98.4%], and CR [90.9%] dyes in water under UV light source. Radicals formation was confi rmed by the
ESR technique. TOC analysis was done to verify the degradation of dyes. ZnS–ZnO nanocomposite also exhibited potent
or robust antibacterial activity.
