Synthesis and Characterization of TiO2 Nanotubes (TiO2-NTs) Decorated with Platine Nanoparticles (Pt-NPs): Photocatalytic Performance for Simultaneous Removal of Microorganisms and Volatile Organic Compounds

Abstract

This work reports on the effect of TiO2 nanotubes (TiO2-NTs), decorated wih platinum nanoparticles (Pt-NPs), on the removal of bacteria and volatile organic compounds (VOCs). The Pt-NPs were loaded onto the TiO2-NTs using the electrodeposition method at four decoration times (100, 200, 300, and 600 s). The realized Pt-NPs/TiO2-NTs nanocomposites were used for the degradation of cyclohexane, a highly toxic and carcinogenic VOC pollutant in the chemical industry. The achieved Pt-NPs/TiO2-NTs nanocomposites were characterized using X-ray diffraction (XRD), photoluminescence (PL), diffuse reflectance spectroscopy (UV–Vis), and scanning (SEM) and transmission (TEM) electron microscopy. To understand the photocatalytic and antibacterial behavior of the Pt-NPs/TiO2-NTs, simultaneous treatment of Escherichia coli and cyclohexane was conducted while varying the catalyst time decoration. We noticed a complete bacterial inactivation rate with 90% VOC removal within 60 min of visible light irradiation. Moreover, the Langmuir–Hinshelwood model correlated well with the experimental results of the photocatalytic treatment of indoor air.

Synergistic Effects of Multiple Heterojunctions and Dopant Atom for Enhancing the Photocatalytic Activity of C-Modified Zn-Doped TiO2 Nanofiber Film

“…Residual dyes in wastewater, although at low concentrations, are harmful to animals, plants and humans due to their non-degradability and toxicity [5][6][7]. Because of their unique physicochemical characteristics, nanoscale semiconductor photocatalytic materials are widely used in dye removal [8]. In recent decades, TiO 2 has become an attractive semiconductor for photocatalysis due to its favorable stability and environmental friendliness [9][10][11][12].…”

Photocatalytic Activity of Silicon Nanowires Decorated with PbS Nanoparticles Deposited by Pulsed Laser Deposition for Efficient Wastewater Treatment

“…The SiNWs were elaborated by the Ag-assisted chemical etching technique (Ag-ACE) [ 12 ], and the PbS nanoparticles were deposited by pulsed laser deposition [ 13 , 14 , 15 ]. On the other hand, semiconductor-mediated photocatalysis is a widely adopted procedure [ 16 , 17 , 18 , 19 , 20 ] to degrade dyes and organic contaminants in wastewater, especially those decorated with nanoparticles [ 21 , 22 ]. It is our belief that the photodegradation effectiveness of dyes by PbS/SiNWs nanohybrids is reported first in this work.…”