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<p>Photocatalysis holds great promise as a replacement for various conventional wastewater treatment technologies, because it employs visible light to break down organic and inorganic pollutants. Integrated photocatalyst adsorbent (IPCA) is a system that merges the process of photocatalysis and adsorption, offering an efficient solution for degrading toxic organic compounds under UV or visible-light exposure. Here, a simple and economical methodology was employed for the synthesis of hydrogel IPCA, which consists of PVA, graphite, and TiO<sub>2</sub> nanoparticles (PVA/Gr/TiO<sub>2</sub>), for the degradation of methylene blue dye. To compare the effects of photocatalyst in dye degradation, another hydrogel membrane (PVA/Gr) without the addition of TiO<sub>2</sub> was also prepared. TiO<sub>2</sub> nanoparticles function as photocatalytic material, while graphite strengthens the structural stability of the hydrogel matrix. Although TiO<sub>2</sub> itself acts as an efficient photocatalyst in dye degradation technology, using it in powder form poses challenges for catalyst recovery and reuse. Therefore, integrating TiO<sub>2</sub> into a membrane-based adsorbent offers a more efficient approach in wastewater treatment. A comprehensive physicochemical characterization was conducted to analyze the impact of TiO<sub>2</sub> nanoparticles on the properties of hydrogel membrane. PVA/Gr/TiO<sub>2</sub> IPCA exhibits good photocatalytic degradation of methylene blue dye under natural light condition. The incorporation of TiO<sub>2</sub> nanoparticles into the PVA/graphite matrix significantly improved the hydrogel membrane’s photocatalytic and adsorption capabilities. Future research is required to broaden the hydrogel IPCA’s applicability in real-time settings.</p> Graphical abstract <p></p>

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Synthesis of TiO2 nanoparticles incorporated Integrated Photocatalyst Adsorbent (PVA/Graphite/TiO2) as a hydrogel membrane towards efficient photocatalytic wastewater treatment

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Buvana Sampath,
  • Julie Charles

摘要

Photocatalysis holds great promise as a replacement for various conventional wastewater treatment technologies, because it employs visible light to break down organic and inorganic pollutants. Integrated photocatalyst adsorbent (IPCA) is a system that merges the process of photocatalysis and adsorption, offering an efficient solution for degrading toxic organic compounds under UV or visible-light exposure. Here, a simple and economical methodology was employed for the synthesis of hydrogel IPCA, which consists of PVA, graphite, and TiO2 nanoparticles (PVA/Gr/TiO2), for the degradation of methylene blue dye. To compare the effects of photocatalyst in dye degradation, another hydrogel membrane (PVA/Gr) without the addition of TiO2 was also prepared. TiO2 nanoparticles function as photocatalytic material, while graphite strengthens the structural stability of the hydrogel matrix. Although TiO2 itself acts as an efficient photocatalyst in dye degradation technology, using it in powder form poses challenges for catalyst recovery and reuse. Therefore, integrating TiO2 into a membrane-based adsorbent offers a more efficient approach in wastewater treatment. A comprehensive physicochemical characterization was conducted to analyze the impact of TiO2 nanoparticles on the properties of hydrogel membrane. PVA/Gr/TiO2 IPCA exhibits good photocatalytic degradation of methylene blue dye under natural light condition. The incorporation of TiO2 nanoparticles into the PVA/graphite matrix significantly improved the hydrogel membrane’s photocatalytic and adsorption capabilities. Future research is required to broaden the hydrogel IPCA’s applicability in real-time settings.

Graphical abstract