Journal
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Volume 423, Issue -, Pages 339-346Publisher
ELSEVIER
DOI: 10.1016/j.molcata.2016.07.029
Keywords
Photocatalytic oxidation; NO; TiO2-GR; UV/H2O2; Mechanism
Categories
Funding
- Assembly Foundation of The Industry and Information Ministry of the People's Republic of China [2012 (543)]
- National Natural Science Foundation of China [51408309, 51578288]
- Science and Technology Support Program of Jiangsu Province [BE2014713]
- Natural Science Foundation of Jiangsu Province [BK20140777]
- Industry-Academia Cooperation Innovation Fund Projects of Jiangsu Province [BY2014004-10]
- Science and technology project of Nanjing [201306012]
- Jiangsu Province Scientific and Technological Achievements into a Special Fund Project [BA2015062]
- Priority Academic Program Development of Jiangsu Higher Education of Jiangsu Higher Education Institutions
- Key Project of Chinese National Programs for Research and Development [2016YFC0203800]
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This study aimed at investigating the photocatalytic oxidation (PCO) of NO under the UV/H2O2 system over a series of TiO2-Graphene (TiO2-GR) catalysts, which was able to dramatically improve the PCO efficiency of NO compared with pure TiO2, and the NO oxidative product was the stable nitrate. The electronic interfacial interaction between GR and TiO2 resulted in a negative shift of the CB of TiO2 evidenced by MS. The excellent conductivity of GR suppressed e(-)/h(+) pairs recombination effectively, and GR as a kind of dispersant reduced the size of TiO2, increased the active sites. These advantages offered e(-) and h(+) more opportunities to participate in PCO of NO, resulting in significant improvement of the PCO efficiency. The effects of the active species involved in the photocatalytic process were also examined. Moreover, different tests were designed to further confirm the improved mechanism. Further investigations showed that their could oxidize NO directly. (C) 2016 Elsevier B.V. All rights reserved.
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