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<p>This study explores the structural, optical, and photocatalytic properties of Ti-doped ZnO (Zn₁₋ₓTiₓO) and its composite with reduced graphene oxide (rGO) for efficient dye degradation. The materials were synthesized via a hydrothermal method, with their structural characteristics analyzed through X-ray diffraction (XRD), transmission electron microscopy (TEM), and Raman spectroscopy. Ti incorporation into the ZnO matrix was confirmed, with doping concentrations up to 6 mol% causing a slight reduction in crystallinity. The Zn<sub>0.94</sub>Ti<sub>0.06</sub>O/rGO composite was successfully formed and its photocatalytic performance was assessed under various conditions, including photocatalyst loading, solution pH, and irradiation time. The composite demonstrated a remarkable 100% degradation of Coomassie Brilliant Blue R-250 (CBB R-250) dye under solar light, surpassing both undoped ZnO and Ti-doped ZnO. A reduced bandgap enabled enhanced visible-light absorption, while scavenger tests revealed that superoxide (O<sub>2</sub>•<sup>−</sup>) and hydroxyl (OH•) radicals played pivotal roles in the degradation process. Cyclic tests confirmed the high stability and reusability of the Zn<sub>0.94</sub>Ti<sub>0.06</sub>O/rGO composite, highlighting its potential as an efficient, eco-friendly photocatalyst for dye removal.</p><p></p>

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Controlled synthesis of Ti-Doped ZnO/rGO nanocomposites for textile wastewater photocatalysis

  • 期刊论文

  • 发表日期：

    2025年10月11日

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  • Haifa Al-Temani,
  • Samah Maatoug,
  • Ali Moulahi,
  • Elham Abu Nab,
  • Raseel Al-Shehri

摘要

This study explores the structural, optical, and photocatalytic properties of Ti-doped ZnO (Zn₁₋ₓTiₓO) and its composite with reduced graphene oxide (rGO) for efficient dye degradation. The materials were synthesized via a hydrothermal method, with their structural characteristics analyzed through X-ray diffraction (XRD), transmission electron microscopy (TEM), and Raman spectroscopy. Ti incorporation into the ZnO matrix was confirmed, with doping concentrations up to 6 mol% causing a slight reduction in crystallinity. The Zn0.94Ti0.06O/rGO composite was successfully formed and its photocatalytic performance was assessed under various conditions, including photocatalyst loading, solution pH, and irradiation time. The composite demonstrated a remarkable 100% degradation of Coomassie Brilliant Blue R-250 (CBB R-250) dye under solar light, surpassing both undoped ZnO and Ti-doped ZnO. A reduced bandgap enabled enhanced visible-light absorption, while scavenger tests revealed that superoxide (O2•−) and hydroxyl (OH•) radicals played pivotal roles in the degradation process. Cyclic tests confirmed the high stability and reusability of the Zn0.94Ti0.06O/rGO composite, highlighting its potential as an efficient, eco-friendly photocatalyst for dye removal.