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Vacancy-Rich and Porous NiFe-Layered Double Hydroxide Ultrathin Nanosheets for Efficient Photocatalytic NO Oxidation and Storage

Li, Hao (author)
Institute of Environmental Engineering, Zürich, Switzerland; Laboratory for Advanced Analytical Technologies, Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
Zhu, Huijun (author)
Linköpings universitet
Shi, Yanbiao (author)
School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China
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Shang, Huan (author)
Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan, China
Zhang, Lizhi (author)
School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China; Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan, China;
Wang, Jing (author)
Institute of Environmental Engineering, Zürich, Switzerland; Laboratory for Advanced Analytical Technologies, Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
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 (creator_code:org_t)
2022-01-21
2022
English.
In: Environmental Science and Technology. - Columbus, OH, United States : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 56:3, s. 1771-1779
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • An appealing strategy in the direction of circular chemistry and sustainable nitrogen exploitation is to efficiently convert NOx pollutants into low-toxic products and simultaneously provide crop plants with metabolic nitrogen. This study demonstrates that such a scenario can be realized by a defect- and morphology-coengineered Ni-Fe-layered double hydroxide (NiFe-LDH) comprising ultrathin nanosheets. Rich oxygen vacancies are introduced onto the NiFe-LDH surface, which facilitate charge carrier transfer and enable photocatalytic O2 activation into superoxide radicals (•O2-) under visible light. •O2- on NiFe-LDH thermodynamically oxidizes NO into nitrate with selectivity over 92%, thus suppressing dangerous NO2 emissions. By merit of abundant mesopores on NiFe-LDH ultrathin nanosheets bearing a high surface area (103.08 m2/g), nitrate can be readily stored without compromising the NO oxidation reactivity or selectivity for long-term usage. The nitrate species can be easily washed off the NiFe-LDH surface and then enriched in the liquid form as easy-to-use chemicals.

Subject headings

NATURVETENSKAP  -- Kemi -- Annan kemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)

Keyword

photocatalysis
NO removal
layered double hydroxide
environmental control
nitrate storage

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ref (subject category)
art (subject category)

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By the author/editor
Li, Hao
Zhu, Huijun
Shi, Yanbiao
Shang, Huan
Zhang, Lizhi
Wang, Jing
About the subject
NATURAL SCIENCES
NATURAL SCIENCES
and Chemical Science ...
and Other Chemistry ...
Articles in the publication
Environmental Sc ...
By the university
Linköping University

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