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Unveiling the collective effects of moisture and oxygen on the photocatalytic degradation of m-Xylene using a titanium dioxide supported platinum catalyst

Title
Unveiling the collective effects of moisture and oxygen on the photocatalytic degradation of m-Xylene using a titanium dioxide supported platinum catalyst
Author
김기현
Keywords
Air pollution; Aromatic hydrocarbon; Oxygen content; Photocatalysis; Relative humidity
Issue Date
2022-07
Publisher
Elsevier B.V.
Citation
Chemical Engineering Journal, v. 439, article no. 135747, Page. 1-13
Abstract
The development of practical photocatalytic system is of great significance in pursuit of efficient removal of hazardous volatile organic compounds (VOC) in indoor environments. The photocatalytic degradation (PCD) of VOC, as assessed commonly in terms of conversion efficiency (e.g., into intermediate/by-product species), is affected by the combined effects of multiple variables in the reaction environment such as relative humidity (RH) level and oxygen (O2) content. In this research, the interactive relationship between such variables (e.g., RH from 0 to 100% and the O2 level from 0 to 21%) has been studied using m-xylene (X) as model compound in a dynamic flow reactor system made of the titanium dioxide-supported platinum (Pt/TiO2). Accordingly, the involvement of water (H2O) and O2 is found to synergistically increase the PCD efficiency for the mineralization of xylene through the generation of a large number of reactive oxygen species (ROS: e.g., superoxide anion and hydroxyl radicals from the adsorbed O2 and H2O molecules, respectively) under ultraviolet (UV) irradiation. The detailed information acquired in this research is expected to offer valuable insights into the degradation pathways of aromatic VOC and the interactive roles between PCD process variables, especially water and oxygen.
URI
https://www.sciencedirect.com/science/article/pii/S1385894722012475?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/176654
ISSN
1385-8947;1873-3212
DOI
10.1016/j.cej.2022.135747
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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