CuO‐SiO2 based nanocomposites: Synthesis, characterization, photocatalytic, antileishmanial, and antioxidant studies

• Published in: Journal of the Chinese Chemical Society (Taipei) 2022-09, Vol.69 (9), p.1637-1653
• Main Authors: Yaseen, Muhammad, Farooq, Saima, Khan, Abbas, Shah, Nasrullah, Shah, Luqman Ali, Bibi, Shaista, Khan, Imdad Ullah, Ahmad, Sajjad
• Format: Article
• Language: English
• Subjects: antileishmanial; antioxidant; Antioxidants; Aqueous solutions; Bimetals; Copper; Copper oxides; crystal violet; Dyes; Electron microscopy; Ethanol; Infrared spectroscopy; Microscopy; Nanocomposites; Nanoparticles; Photocatalysis; photocatalytic degradation; Photodegradation; Pollutants; Pollution abatement; Precursors; Silicon dioxide; SiO2; Sol-gel processes; Synthesis
• ISSN: 0009-4536; 2192-6549
• DOI: 10.1002/jccs.202200182

The abatement of toxic pollutants and drug‐resistant pathogens from water is one of the major environmental issues. In this work, we are reporting the preparation, detailed characterization and photocatalytic degradation, and biological activities of bimetallic oxides (CuO‐SiO2) nanocomposite. For this purpose, CuO, SiO2 nanoparticles, and CuO‐SiO2 nanocomposites were successfully synthesized through sol–gel process. The nanoparticles and nanocomposite were prepared by taking the Cu(NO3)2.3H2O as copper oxide precursor and TEOS as silica precursor using absolute ethanol and water as solvents The molar ratio of TEOS: Glycerol: H2O used was 1.5:1:6.6 respectively. The synthesized nanoparticles and nanocomposites were characterized by using Scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier‐transform infrared spectroscopy (FTIR), X‐ray diffraction (XRD) and Brunauer–Emmett–Teller (BET). The nanocomposites and individual nanoparticles were then applied as catalysts for their activities toward catalytic/photocatalytic degradation of crystal violet (CV) dye in an aqueous medium. The degradation progress was monitored by UV–Visible spectroscopic analysis. It was found that CuO‐SiO2 nanocomposite shows good photocatalytic activities toward the removal of crystal violet dye as compared to the catalytic activities of its individual constitutes. The antileishmanial and antioxidant activities results indicate that synthesized materials have promising biological attributes. Binary nanocomposite of CuO‐SiO2 was successfully synthesized using the sol–gel process and applied for various potential applications. The catalytic/photocatalytic activities of the individual particles (CuO and SiO2), toward removal of CV dye from water, were compared with those of CuO‐SiO2 nanocomposite. Similarly, the activities, in terms of antileishmanial and antioxidant, of the synthesized materials were also traced.