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Advances in Materials Research
  Volume 11, Number 3, September 2022 , pages 225-235

Synthesis, characterization and potential applications of Ag@ZnO nanocomposites with S@g-C3N4
Naveed Ahmad, Mohsin Javed, Muhammad A. Qamar, Umbreen Kiran, Sammia Shahid, Muhammad B. Akbar, Mudassar Sher and Adnan Amjad

    It includes the synthesis of pristine ZnO nanoparticles and a series of Ag-doped zinc oxide nanoparticles was carried out by reflux method by varying the amount of silver (1, 3, 5, 7 and 9% by mol.). The morphology of these nanoparticles was investigated by SEM, XRD and FT-IR techniques. These techniques show that synthesized particles are homogenous spherical nanoparticles having an average particle size of about 50-100 nm along with some agglomeration. The photocatalytic activity of the ZnO nanoparticles and Ag doped ZnO nanoparticles were investigated via photodegradation of methylene blue (MB) as a standard dye. The data from the photocatalytic activity of these nanoparticles show that 7% Ag-doped ZnO nanoparticles exhibit much enhanced photocatalytic activity as compared to pristine ZnO nanoparticles and other percentages of Ag-doped ZnO nanoparticles. Furthermore, 7% Ag-doped ZnO was made composites with sulfur-doped graphitic carbon nitride by physical mixing method and a series of nanocomposites were made (3.5, 7.5, 25, 50, 75% by weight). It was observed that the 25% composites exhibited better photocatalytic performance than pristine S-g-C3N4 and pure 7% Ag-doped ZnO. Tauc's plot also supports the photodegradation results.
Key Words
    composites; nanoparticles; photocatalytic activity; photodegradation; S-g-C3N4; ZnO
(1) Naveed Ahmad, Mohsin Javed, Muhammad A. Qamar, Umbreen Kiran, Sammia Shahid, Mudassar Sher, Adnan Amjad:
Department of Chemistry, University of Management and Technology, Lahore, Pakistan;
(2) Naveed Ahmad:
Department of Chemistry, University of Turin Via Pietro Giuria 5, 10125 Turin, Italy;
(3) Muhammad B. Akbar:
National Center for Nanoscience Technology (NCNST), No. 11, Zhong Guan Cun Bei Yitiao, 100190 Beijing, P.R. China.

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