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Tytuł:
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Single layered hollow NiO-NiS catalyst with large specific surface area and highly efficient visible-light-driven carbon dioxide conversion.
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Autorzy:
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Park BH; Department of Chemistry, College of Natural Sciences, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
Kim M; School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
Park NK; School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
Ryu HJ; Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, Republic of Korea.
Baek JI; Korea Electric Power Corporation Research Institute, 105 Munji-ro, Yuseong-gu, Daejeon, 34056, Republic of Korea.
Kang M; Department of Chemistry, College of Natural Sciences, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea. Electronic address: .
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Źródło:
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Chemosphere [Chemosphere] 2021 Oct; Vol. 280, pp. 130759. Date of Electronic Publication: 2021 May 03.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Publication: Oxford : Elsevier Science Ltd
Original Publication: Oxford, New York, : Pergamon Press.
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MeSH Terms:
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Carbon Dioxide*
Light*
Adsorption ; Catalysis ; Methane
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Contributed Indexing:
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Keywords: Carbon dioxide photoreduction; Effective charge separation; Large specific surface area; Single layered hollow
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Substance Nomenclature:
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142M471B3J (Carbon Dioxide)
OP0UW79H66 (Methane)
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Entry Date(s):
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Date Created: 20210508 Date Completed: 20210623 Latest Revision: 20210623
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Update Code:
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20240105
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DOI:
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10.1016/j.chemosphere.2021.130759
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PMID:
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33964757
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A sea urchin-shaped, single-layer, and hollow NiO-NiS photocatalyst with a large surface area was designed for carbon dioxide (CO 2 ) conversion in this study. A d-glucose polymeric hollow frame was fabricated using a d-glucose monomer, and NiO particles were stably grown on it using the hydrothermal method to form a hollow NiO surface. The d-glucose frame was removed by heat treatment to create hollowed NiO; hollowed NiO-NiS (h-NiO-NiS) was subsequently obtained through ion exchange between the O ions in NiO and S ions in the sulfur powder. Additionally, we attempted to determine the correlation among the surface area of the h-NiO-NiS catalyst, CO 2 gas adsorption capacity, and catalyst performance. The surface area of the h-NiO-NiS catalyst was ten times larger than that of the nanometer-sized NiO-NiS (n-NiO-NiS, 21.2 m 2 g -1 ) catalyst. The CO 2 photocatalytic conversion performance of the hollowed catalyst was approximately seven times larger than that of the nanosized catalyst. As the amount of ion-exchanged S increased, methane selectivity increased, and optimal methane production was obtained when the weight ratio of NiO and sulfur powder was 1 : 4. Using temperature-programmed desorption (TPD) analyses of CO 2 and H 2 O, the adsorption of water molecules on the Ni-S surface and that of CO 2 gas on the Ni-O surface during CO 2 conversion reaction were confirmed. The h-NiO-NiS catalyst facilitated an effective charge separation through a well-developed interfacial transition between the linked NiS and NiO, and resulted in increased CO 2 photoreduction performance under sunlight.
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