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<p>The hexagonal n-type tungsten oxide (WO<sub>3</sub>) nanorods were synthesized via a surfactant-assisted hydrothermal method for dual applications in dye-sensitized solar cells (DSSCs) and wastewater treatment. Sodium dodecyl sulfate (SDS) played a crucial role in controlling the morphology, with concentrations varied from 0 to 150&#xa0;mg. The optimized W100 sample with 100&#xa0;mg of SDS comprised well-defined mesoporous WO<sub>3</sub> nanorods. Structural analysis confirmed improved crystallinity with reduced lattice imperfections. Morphological studies revealed a high specific surface area of 33.99 m<sup>2</sup>/g and a pore radius of 21.70&#xa0;Å. Optical measurements showed a narrowed bandgap of 2.00&#xa0;eV, promoting enhanced visible-light absorption. Electrochemical analysis indicated a low charge-transfer resistance of 2.58 Ω and an extended electron lifetime of 0.11&#xa0;s, suggesting efficient charge transport and reduced recombination. As a photoanode, W100 achieved a power conversion efficiency (PCE) of 2.21%. Whereas, the W100 was employed as a Pt-free counter electrode in the DSSC, it achieved a PCE of 2.55%. Additionally, the optimized sample exhibited excellent photocatalytic activity, achieving 95.42% degradation of Rose Bengal dye within 90&#xa0;min, which further improved to 99.49% in 20&#xa0;min upon H<sub>2</sub>O<sub>2</sub> addition. These results highlight the potential of SDS-directed WO<sub>3</sub> nanorods for multifunctional energy and environmental applications.</p>

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SDS-directed WO3 NRs: a cost-effective dual-functional material for DSSC and photocatalysis

  • 期刊论文

  • 发表日期：

    2026年4月26日

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  • Rukhsar Bi Momin,
  • Rekha Rajput,
  • Gopika Rajan,
  • Rahilah Shaikh,
  • Rohidas B. Kale

摘要

The hexagonal n-type tungsten oxide (WO3) nanorods were synthesized via a surfactant-assisted hydrothermal method for dual applications in dye-sensitized solar cells (DSSCs) and wastewater treatment. Sodium dodecyl sulfate (SDS) played a crucial role in controlling the morphology, with concentrations varied from 0 to 150 mg. The optimized W100 sample with 100 mg of SDS comprised well-defined mesoporous WO3 nanorods. Structural analysis confirmed improved crystallinity with reduced lattice imperfections. Morphological studies revealed a high specific surface area of 33.99 m2/g and a pore radius of 21.70 Å. Optical measurements showed a narrowed bandgap of 2.00 eV, promoting enhanced visible-light absorption. Electrochemical analysis indicated a low charge-transfer resistance of 2.58 Ω and an extended electron lifetime of 0.11 s, suggesting efficient charge transport and reduced recombination. As a photoanode, W100 achieved a power conversion efficiency (PCE) of 2.21%. Whereas, the W100 was employed as a Pt-free counter electrode in the DSSC, it achieved a PCE of 2.55%. Additionally, the optimized sample exhibited excellent photocatalytic activity, achieving 95.42% degradation of Rose Bengal dye within 90 min, which further improved to 99.49% in 20 min upon H2O2 addition. These results highlight the potential of SDS-directed WO3 nanorods for multifunctional energy and environmental applications.