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  1. Home
  3. Solid-state In Situ Synthesis Of G-c3n4/zno Nanocomposites For Photocatalytic Water Cleaning.
  1. Home
  3. Solid-state In Situ Synthesis Of G-c3n4/zno Nanocomposites For Photocatalytic Water Cleaning.

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Solid-state in situ synthesis of g-C3N4/ZnO nanocomposites for photocatalytic water cleaning.

Adina Zholdas1,2, Abylay Abilkhan2, Islam Rakhimbek2

  • 1Department of General and Inorganic Chemistry, Al-Farabi Kazakh National University 050040 Almaty Kazakhstan batukhan.tatykayev@nu.edu.kz.

RSC Advances
|October 20, 2025

View abstract on PubMed

Summary
This summary is machine-generated.

We developed a green, solvent-free method to create graphitic carbon nitride/zinc oxide (g-C3N4/ZnO) nanocomposites. These advanced materials efficiently degrade pollutants in wastewater using solar energy, offering a sustainable solution.

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Area of Science:

  • Materials Science
  • Environmental Science
  • Nanotechnology

Background:

  • Wastewater remediation requires efficient and sustainable photocatalytic materials.
  • Existing methods often involve organic solvents and lack scalability.
  • Developing robust heterojunctions is key for enhanced photocatalytic activity.

Purpose of the Study:

  • To present a scalable, solvent-free synthesis of g-C3N4/ZnO heterostructured nanocomposites.
  • To investigate their efficiency for solar-driven wastewater treatment.
  • To understand the degradation mechanism and catalyst reusability.

Main Methods:

  • A two-step synthesis involving thermal polymerization of melamine for g-C3N4, followed by mechanochemical introduction of ZnO.
  • Characterization of synthesized nanocomposites with varying g-C3N4 content (2-20 wt%).
  • Photocatalytic degradation experiments using methylene blue under simulated solar irradiation and reactive species trapping.

Main Results:

  • The optimized ZOCN10 (10 wt% g-C3N4) composite showed a rate constant of 0.0389 min⁻¹.
  • Achieved ~95% methylene blue removal within 90 minutes, significantly outperforming pristine ZnO and g-C3N4.
  • Identified holes (h⁺) and superoxide radicals (O2⁻) as primary active species.

Conclusions:

  • The mechanochemically assisted, solvent-free approach yields high-performance g-C3N4/ZnO photocatalysts.
  • The developed nanocomposites are effective for solar-driven wastewater purification with good reusability.
  • This method offers a green, cost-effective, and scalable route for advanced water treatment solutions.