期刊
ENVIRONMENTAL RESEARCH
卷 212, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2022.113405
关键词
Nitrogen oxide; Photocatalysis; g-C3N4; Prepositive NaOH solution; Hydroxyl radical
资金
- National Nature Science Foundation of China [21876104and 21603271]
- Scientific research program for Youth Innovation Team Construction of Shaanxi Provincial Department of Education [21JP107]
- Science and Technology Project Foundation of Xi?an [2020KJWL17]
It was found that the prepositive NaOH solution can significantly improve the photocatalytic NO removal activity of g-C3N4, by increasing humidity and pH value, enhancing adsorption ability, reducing difficulty, and forming synergistic effect.
Photocatalysis technology is used to remove the low concentration NO in recent years. However, the effect of this process is not very satisfactory. In this study, it was found that the prepositive NaOH solution could significantly improve the photocatalytic NO removal activity of g-C3N4. The apparent quantum yield of g-C3N4 in the NO removal process was increased 3.5 times by the prepositive NaOH solution. The reason is that there was a synergistic effect formed between the prepositive NaOH solution and the photocatalytic NO removal process. The prepositive NaOH solution not only could increase the humidity and pH value in the photocatalytic unit, but also could improve the adsorption ability of g-C3N4 for the H2O, NO, and O-2. Moreover, the prepositive NaOH solution reduced the difficulty of the photogenerated carriers' transport and the center dot OH generation. This study provided a new idea for the removal of low-concentration NOx.
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