Journal
CHEMICAL ENGINEERING JOURNAL
Volume 387, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.124171
Keywords
Ti3+ self-doped TiO2; Copper decorated; Photocatalysis; Antifungal; Fluorescent staining
Categories
Funding
- National Natural Science Foundation of China [21571160]
- National Natural Science Foundation of China-Henan Talents Fostering Joint Funds [U1504311]
- Key Research Projects of the Science and Technology Department of Henan Province [182102210153]
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In this study, Ti(3+ )self-doped TiO2 decorated with metallic copper photocatalyst (marked as Cu/Ti3+-TiO2) was successfully prepared by a novel method. The ESA (Electron Spin Resonance) analysis indicated that the synthesized sample contained Ti3+. The TEM (transmission electron microscopy) images showed that the TiO2 nanoparticles were modified with nano copper. The as-synthesized photocatalyst was found to exhibit markedly enhanced photocatalytic inactivation of E. coli. under visible light irradiation compared with pure TiO2, especially in the case of the 10% Cu/Ti3+-TiO2 sample. The photodisinfection effect of the 10% Cu/Ti3+-TiO2 sample was further confirmed using five agricultural pathogenic fungal spores. The photocatalytic inactivation effect against F. graminearum and Bottyosphaeria dothidea spores was certified by fluorescent staining of CFDA-AM (the acetoxymethyl ester of the esterase substrate 5-carboxyfluorescein diacetate)/PI (Propidium Iodide). In addition, fluorescent staining by H(2)DCFDA demonstrated that the intracellular ROS (reactive oxygen species) of the F. graminearum macroconidia was increased after treatment by the photocatalysis.
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