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Construction of Hierarchical Black TiO 2 /Carbon Fiber: Enhanced Photocatalytic Activity Based on Schottky Heterojunctions.

Xiaofeng DongHaiqing LiYi GuoChangchun GeJianrui Zha
Published in: ACS applied bio materials (2024)
Photocatalytic antimicrobials, as emerging advanced oxidative antimicrobial materials, have the advantages of low price and long-lasting antimicrobial properties. Nevertheless, with catalysts increasingly trending toward nanoscale dimensions, the environmental challenge of catalyst recycling becomes more pronounced. In this paper, we propose utilizing one-dimensional carbon fiber as a substrate, employing the nucleating agent method to induce Titanium dioxide (TiO 2 ) growth on the fiber surface. Furthermore, the material's band gap underwent modification through hydrogen calcination, thus resulting in the attainment of hierarchical black TiO 2 /carbon fiber composites with visible light-driven capabilities. The characterization of the materials was conducted via scanning electron microscope (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The results revealed that when the black hydrogenated TiO 2 was composited with carbon fiber, the Schottky heterojunction was formed, and thus effectively improved the photocatalytic effect of the composites. Notably, the degradation rate of methylene blue achieved 96.25% within 150 min when utilizing black TiO 2 /carbon fiber composites, while the inactivation rate of Escherichia coli ( E. coli ) reached 97.58% within 0.5 h and attained complete inactivation within 60 min.
Keyphrases
  • visible light
  • electron microscopy
  • escherichia coli
  • high resolution
  • mass spectrometry
  • computed tomography
  • multidrug resistant
  • gold nanoparticles
  • klebsiella pneumoniae
  • high density
  • single molecule
  • room temperature