“…15 . Other technologies proposed to minimize the effect of these contaminants include non-thermal plasma, electrochemical oxidation, adsorption and ozonation [ 105 , 106 ]. Fig.…”
Section: Some Technologies For the Treatment Flue Gasesmentioning
“…15 . Other technologies proposed to minimize the effect of these contaminants include non-thermal plasma, electrochemical oxidation, adsorption and ozonation [ 105 , 106 ]. Fig.…”
Section: Some Technologies For the Treatment Flue Gasesmentioning
“…Traditional physical methods (e.g., air stripping, carbon adsorption) may also prove inadequate in removing 1,4-D. Although the most effective distillation method exists, it is not widely adopted because of its high cost [3]. Advanced oxidation processes (AOPs) have been considered a promising alternative for 1,4-D degradation, exhibiting significant efficiency [4].…”
Photocatalysts exhibiting high activity for the degradation of 1,4-dioxane (1,4-D) have been a subject of intense focus due to their high toxicity and challenging degradability. Bismuth oxide (Bi2O3) is recognized as an ideal photocatalyst; however, there have been limited studies on its effectiveness in 1,4-D degradation. It is crucial to address the issue of low photocatalytic efficiency attributed to the instability and easy recombination of photogenerated electrons and holes in Bi2O3 upon photoexcitation. In this study, Cu-MOF and oxygen vacancy were utilized to improve the 1,4-D photocatalytic degradation efficiency of Bi2O3 by preparing Bi2O3, Bi2O3/Cu-MOF, Bi2O3−x, and Bi2O3−x/Cu-MOF. The results revealed that the incorporation of Cu-MOF induced a larger specific surface area, a well-developed pore structure, and a smaller particle size in Bi2O3, facilitating enhanced visible light utilization and an improved photoelectron transfer rate, leading to the highest photocatalytic activity observed in Bi2O3/Cu-MOF. In addition, oxygen vacancies were found to negatively affect the photocatalytic activity of Bi2O3, mainly due to the transformation of the β-Bi2O3 crystalline phase into α-Bi2O3 caused by oxygen vacancies. Further, the synergistic effect of MOF and oxygen vacancies did not positively affect the photocatalytic activity of Bi2O3. Therefore, the construction of heterojunctions using Cu-MOF can significantly enhance the efficiency of degradation of 1,4-D, and Bi2O3/Cu-MOF appears to be a promising photocatalyst for 1,4-D degradation. This study opens new avenues for the design and optimization of advanced photocatalytic materials with improved efficiency for the treatment of recalcitrant organic pollutants.
“…In addition, hydrophilization of the surface results in a self-cleaning function in which contaminants are cleaned by rain [37,38]. When the surface on which the photocatalyst is coated is organic, a silica film is formed to prepare the substrate for deformation after a long time and the surface is then coated with the photocatalyst [39]. Indoor air purification and fine dust removal can be achieved by a photocatalytic reaction when the polycarbonate surface is coated with a photocatalyst thin film.…”
N- and Ni-coated TiO2 (NNT) were prepared by a facile sol-gel method as a photosensitive photocatalyst to visible light. NNT sol was used to coat the surface of an LED lamp cap and body made of polycarbonate with a thin NNT film. The coated thin film was dried in an oven at 130 °C. This NNT thin film had an amorphous TiO2 structure and absorbed 600 nm of visible light. The decomposition properties of formaldehyde on the NNT photocatalyst after irradiation with visible light were investigated. The LED lamp was irradiated with visible light at 500–620 nm and 6 W. Formaldehyde was decomposed by a photocatalytic reaction by visible light irradiation on the NNT-coated polycarbonate surface. Escherichia coli (E. coli), Staphylococcus aureus, and Pseudomonas aeruginosa were also used to examine the sterilizing properties of pathogenic bacteria using an LED lamp kit. The pathogenic bacteria on the NNT-coated polycarbonate surface were sterilized by irradiation with visible light.
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