InP quantum dots on g-C3N4 nanosheets to promote molecular oxygen activation under visible light |
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| Affiliation: | 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China;2. The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China;1. School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, China;2. Chengdu Institute of Organic Chemistry, Chinese Academy of Science, Chengdu 610041, China;1. The Center of New Energy Materials and Technology, School of Materials Science and Engineering, Southwest Petroleum University, Chengdu, 610500, China;2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China;1. Research Center for Environmental Science & Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China;2. School of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, China;3. Department of Environmental Science and Engineering, Fuzhou University, Fuzhou 350108, China;4. The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China;5. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China |
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| Abstract: | Largely limited by the high dissociation energy of the O O bond, the photocatalytic molecular oxygen activation is highly challenged, which restrains the application of photocatalytic oxidation technology for atmospheric pollutants removal. Herein, we design and fabricate the InP QDs/g-C3N4 compounds. The introduction of InP QDs promotes the charge transfer within the interface resulting in the effective separation of photo-generated carriers. Furthermore, InP QDs greatly facilitates the activation of molecular oxygen and promote the formation of O2 ? under visible-light illumination. These conclusions are identified by experimental and calculation results. Hence, NO can be combined with the O2? to form OONO intermediate to direct conversion into NO3?. As a result, the NO removal ratio of g-C3N4 has a onefold increase after InP QDs loaded and the generation of NO2 is effectively inhibited. This work may provide a strategy to design highly efficient materials for molecular oxygen activation. |
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| Keywords: | InP quantum dots Molecular oxygen activation Photocatalytic NO removal |
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