ZnO Graphene Nanocomposite Quiz

What method was used to synthesize ZnO decorated graphene nanocomposite?

• Chemical precipitation

• Solvothermal method

• Microwave synthesis

• Hydrothermal method

What was the main application demonstrated for the GZ composite?

• Photocatalysis

• Energy storage

• Electronics

• Biomedicine

What is the band gap energy of ZnO?

• 2.5 eV

• 3.37 eV

• 1.8 eV

• 4.0 eV

What pollutants are targeted for removal using photocatalysis?

• Organic dyes

• Heavy metals

• Microplastics

• Nutrients

What technique was used to analyze the homogeneity of the prepared samples?

• Raman mapping

• X-ray diffraction

• SEM

• EDX

What is the chemical formula for zinc acetate dihydrate?

• Zn(CH3COO)2·2H2O

• ZnO

• Zn(CH3COO)2

• ZnO2

What was the result of the photocatalytic activity study of GZ composites?

• Higher activity than pristine ZnO

• Lower activity than pristine ZnO

• No activity

• Equal activity to pristine ZnO

What techniques were used to characterize the synthesized samples?

• Powder XRD

• EDX spectrometry

• Micro-Raman

• UV-Visible diffuse reflectance spectra

What was the excitation source used for the Micro-Raman measurements?

• He-Ne laser

• He-Cd laser

• X-ray

• UV light

What was the concentration of MB in the aqueous solution used for photocatalytic activity experiments?

• 1×10⁵ M

• 1×10⁶ M

• 1×10⁴ M

• 1×10⁷ M