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<p>Bi-based nanomaterials are emerging as promising candidates for photocatalytic applications due to visible light excitation and low-cost. Al-introduced bismuth tungsten composite coatings were fabricated on soda-lime glass via fast and low-cost laser deposition in air. The coating shows good photocatalytic activity, maintaining 0° static water contact angle (WCA) during 2-month outdoor exposure. Without the photocatalytic coating, WCA would increase substantially due to the unavoidable organic contaminant deposition from the ambient. Al-addition enhanced the surface roughness and potentially increased oxygen vacancy, thereby improving the hydrophilicity and photocatalytic activity of the coatings. The methyl orange solution in a jar was effectively degraded by the composite coating under natural sunlight, the experimental results demonstrated that the sample introduced with aluminum degraded 75.9% of the methyl orange solution within 6&#xa0;days. Notice that the jar blocked almost all UV radiation and part of visible and IR radiation. Additionally, over 70% of the dust deposited on the Al-introduced sample was removed by a single-spray cleaning, compared to only 30% removal for the reference, demonstrating the self-cleaning effect of the sample.</p> Graphical abstract

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Introduction of Al to bismuth tungsten-based composite coatings prepared by laser deposition for visible light photocatalysis and long-term superhydrophilicity

  • 期刊论文

  • 发表日期：

    2025年10月12日

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  • Longze Chen,
  • Xiaowen Qi,
  • Xiaolong Fang,
  • Youfu Wang,
  • Chaoran Sun,
  • Jia Liu,
  • Longfei Mi,
  • Xiaojie Chen,
  • Hongtao Cui

摘要

Bi-based nanomaterials are emerging as promising candidates for photocatalytic applications due to visible light excitation and low-cost. Al-introduced bismuth tungsten composite coatings were fabricated on soda-lime glass via fast and low-cost laser deposition in air. The coating shows good photocatalytic activity, maintaining 0° static water contact angle (WCA) during 2-month outdoor exposure. Without the photocatalytic coating, WCA would increase substantially due to the unavoidable organic contaminant deposition from the ambient. Al-addition enhanced the surface roughness and potentially increased oxygen vacancy, thereby improving the hydrophilicity and photocatalytic activity of the coatings. The methyl orange solution in a jar was effectively degraded by the composite coating under natural sunlight, the experimental results demonstrated that the sample introduced with aluminum degraded 75.9% of the methyl orange solution within 6 days. Notice that the jar blocked almost all UV radiation and part of visible and IR radiation. Additionally, over 70% of the dust deposited on the Al-introduced sample was removed by a single-spray cleaning, compared to only 30% removal for the reference, demonstrating the self-cleaning effect of the sample.

Graphical abstract