Abstract
TiO2-supported activated carbon felts (TiO2–ACFTs) were prepared by dip coating of felts composed of activated carbon fibers (ACFs) with either polyester fibers (PS-A20) and/or a polyethylene pulp (PE-W15) in a TiO2 aqueous suspension followed by calcination at 250 °C for 1 h. The as-prepared TiO2–ACFTs with 29–35 wt.% TiO2 were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and N2 adsorption. The TiO2–ACFT(PS-A20) samples with 0 and 29 wt.% TiO2 were microporous with specific surface areas (S BET) of 996 and 738 m2/g, respectively, whereas the TiO2–ACFT(PE-W15) samples with 0 and 35 wt.% TiO2 were mesoporous with S BET of 826 and 586 m2/g, respectively. Adsorption and photocatalytic activity of the as-prepared samples were evaluated by measuring adsorption in the dark and photodegradation of gaseous acetaldehyde (AcH) and methylene blue (MB) in aqueous solution under UV light. The TiO2 loading caused a considerable decrease in the S BET and MB adsorption capacity along with an increase in MB photodegradation and AcH mineralization. Lemna minor was chosen as a representative aquatic plant for ecotoxicity tests measuring detoxification of water obtained from the MB photodegradation reaction with the TiO2–ACFT samples under UV light.
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Acknowledgments
ZCK thanks the Japan Society for the Promotion of Science (JSPS), Japan, for the RONPAKU-JSPS Fellowship award under which the present study was carried out. MH would like to thank the Japan Society for the Promotion of Science (JSPS) for financial support.
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Kadirova, Z.C., Hojamberdiev, M., Katsumata, Ki. et al. Photodegradation of gaseous acetaldehyde and methylene blue in aqueous solution with titanium dioxide-loaded activated carbon fiber polymer materials and aquatic plant ecotoxicity tests. Environ Sci Pollut Res 21, 4309–4319 (2014). https://doi.org/10.1007/s11356-013-2405-3
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DOI: https://doi.org/10.1007/s11356-013-2405-3