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<p>This study investigates sulfur- (S-) and phosphorus- (P-) doped TiO₂ nanofibers as photocatalysts for hydrogen (H₂) production and organic pollutant removal from wastewater and methylene blue (MB)-contaminated water. Nanofibers were synthesized via electrospinning and optimized using Central Composite Design (CCD). Structural analysis confirmed anatase phase, high crystallinity (&gt;67%), and uniform fiber morphology (140–180&#xa0;nm). In wastewater, S-doped TiO₂ showed superior H₂ yield (446.6 mL/g) at 0.05% doping and 80&#xa0;min, outperforming P-doped TiO₂ (406.6 mL/g). In contrast, P-doped TiO₂ excelled in MB-contaminated water (466.6 mL/g vs. 380 mL/g for S-doped) due to dye-sensitized charge transfer. Optimal yields under CCD conditions were 395.2 mL/g (S-doped) and 350.2 mL/g (P-doped) in wastewater and 399.4 mL/g (P-doped) vs. 335.5 mL/g (S-doped) in MB solution (R² &gt; 0.98). P-doped TiO₂ demonstrated better reusability (14.7% yield loss) compared to S-doped (23.5%) over five cycles. S-doped TiO₂ achieved greater COD (75.1%) and TSS (53.6%) removal in wastewater, while P-doped TiO₂ showed better MB degradation and cycle stability. These findings reveal complementary strengths of doped TiO₂ nanofibers, enabling targeted applications in photocatalytic H₂ production and wastewater treatment.</p>

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Development of S and P doped TiO2 nanofibers and their investigation as photocatalyst for H2 production with removal of organic pollutants from diverse water matrices

  • 期刊论文

  • 发表日期：

    2025年7月23日

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  • Ali M. Bastaweesy,
  • Moatasem Kamel,
  • Basma M. Tony,
  • Gehan M.K. Tolba

摘要

This study investigates sulfur- (S-) and phosphorus- (P-) doped TiO₂ nanofibers as photocatalysts for hydrogen (H₂) production and organic pollutant removal from wastewater and methylene blue (MB)-contaminated water. Nanofibers were synthesized via electrospinning and optimized using Central Composite Design (CCD). Structural analysis confirmed anatase phase, high crystallinity (>67%), and uniform fiber morphology (140–180 nm). In wastewater, S-doped TiO₂ showed superior H₂ yield (446.6 mL/g) at 0.05% doping and 80 min, outperforming P-doped TiO₂ (406.6 mL/g). In contrast, P-doped TiO₂ excelled in MB-contaminated water (466.6 mL/g vs. 380 mL/g for S-doped) due to dye-sensitized charge transfer. Optimal yields under CCD conditions were 395.2 mL/g (S-doped) and 350.2 mL/g (P-doped) in wastewater and 399.4 mL/g (P-doped) vs. 335.5 mL/g (S-doped) in MB solution (R² > 0.98). P-doped TiO₂ demonstrated better reusability (14.7% yield loss) compared to S-doped (23.5%) over five cycles. S-doped TiO₂ achieved greater COD (75.1%) and TSS (53.6%) removal in wastewater, while P-doped TiO₂ showed better MB degradation and cycle stability. These findings reveal complementary strengths of doped TiO₂ nanofibers, enabling targeted applications in photocatalytic H₂ production and wastewater treatment.