2D/2D Heterojunction of TiO2 Nanoparticles and Ultrathin G-C3N4 Nanosheets for Efficient Photocatalytic Hydrogen Evolution

Photocatalytic hydrogen evolution is considered one of the promising routes to solve the energy and environmental crises. However, developing efficient and low-cost photocatalysts remains an unsolved challenge. In this work, ultrathin 2D g-C3N4 nanosheets are coupled with flat TiO2 nanoparticles as...

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Published inNanomaterials (Basel, Switzerland) Vol. 12; no. 9; p. 1557
Main Authors Du, Ruifeng, Li, Baoying, Han, Xu, Xiao, Ke, Wang, Xiang, Zhang, Chaoqi, Arbiol, Jordi, Cabot, Andreu
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 04.05.2022
MDPI
Subjects
2D/2D heterojunction
Aqueous solutions
Carbon nitride
charge separation
Composite materials
Ethanol
Evolution
Heterojunctions
Heterostructures
Hydrogen
Hydrogen evolution
Ligands
Light
Morphology
Nanoparticles
Nanosheets
Photocatalysis
Photocatalysts
Scanning electron microscopy
Self-assembly
Semiconductors
Titanium dioxide
Transport properties
United States > US
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Abstract Photocatalytic hydrogen evolution is considered one of the promising routes to solve the energy and environmental crises. However, developing efficient and low-cost photocatalysts remains an unsolved challenge. In this work, ultrathin 2D g-C3N4 nanosheets are coupled with flat TiO2 nanoparticles as face-to-face 2D/2D heterojunction photocatalysts through a simple electrostatic self-assembly method. Compared with g-C3N4 and pure TiO2 nanosheets, 2D/2D TiO2/g-C3N4 heterojunctions exhibit effective charge separation and transport properties that translate into outstanding photocatalytic performances. With the optimized heterostructure composition, stable hydrogen evolution activities are threefold and fourfold higher than those of pure TiO2, and g-C3N4 are consistently obtained. Benefiting from the favorable 2D/2D heterojunction structure, the TiO2/g-C3N4 photocatalyst yields H2 evolution rates up to 3875 μmol·g−1·h−1 with an AQE of 7.16% at 380 nm.
AbstractList Photocatalytic hydrogen evolution is considered one of the promising routes to solve the energy and environmental crises. However, developing efficient and low-cost photocatalysts remains an unsolved challenge. In this work, ultrathin 2D g-C3N4 nanosheets are coupled with flat TiO2 nanoparticles as face-to-face 2D/2D heterojunction photocatalysts through a simple electrostatic self-assembly method. Compared with g-C3N4 and pure TiO2 nanosheets, 2D/2D TiO2/g-C3N4 heterojunctions exhibit effective charge separation and transport properties that translate into outstanding photocatalytic performances. With the optimized heterostructure composition, stable hydrogen evolution activities are threefold and fourfold higher than those of pure TiO2, and g-C3N4 are consistently obtained. Benefiting from the favorable 2D/2D heterojunction structure, the TiO2/g-C3N4 photocatalyst yields H2 evolution rates up to 3875 μmol·g-1·h-1 with an AQE of 7.16% at 380 nm.Photocatalytic hydrogen evolution is considered one of the promising routes to solve the energy and environmental crises. However, developing efficient and low-cost photocatalysts remains an unsolved challenge. In this work, ultrathin 2D g-C3N4 nanosheets are coupled with flat TiO2 nanoparticles as face-to-face 2D/2D heterojunction photocatalysts through a simple electrostatic self-assembly method. Compared with g-C3N4 and pure TiO2 nanosheets, 2D/2D TiO2/g-C3N4 heterojunctions exhibit effective charge separation and transport properties that translate into outstanding photocatalytic performances. With the optimized heterostructure composition, stable hydrogen evolution activities are threefold and fourfold higher than those of pure TiO2, and g-C3N4 are consistently obtained. Benefiting from the favorable 2D/2D heterojunction structure, the TiO2/g-C3N4 photocatalyst yields H2 evolution rates up to 3875 μmol·g-1·h-1 with an AQE of 7.16% at 380 nm.
Photocatalytic hydrogen evolution is considered one of the promising routes to solve the energy and environmental crises. However, developing efficient and low-cost photocatalysts remains an unsolved challenge. In this work, ultrathin 2D g-C3N4 nanosheets are coupled with flat TiO2 nanoparticles as face-to-face 2D/2D heterojunction photocatalysts through a simple electrostatic self-assembly method. Compared with g-C3N4 and pure TiO2 nanosheets, 2D/2D TiO2/g-C3N4 heterojunctions exhibit effective charge separation and transport properties that translate into outstanding photocatalytic performances. With the optimized heterostructure composition, stable hydrogen evolution activities are threefold and fourfold higher than those of pure TiO2, and g-C3N4 are consistently obtained. Benefiting from the favorable 2D/2D heterojunction structure, the TiO2/g-C3N4 photocatalyst yields H2 evolution rates up to 3875 μmol·g−1·h−1 with an AQE of 7.16% at 380 nm.
Photocatalytic hydrogen evolution is considered one of the promising routes to solve the energy and environmental crises. However, developing efficient and low-cost photocatalysts remains an unsolved challenge. In this work, ultrathin 2D g-C 3 N 4 nanosheets are coupled with flat TiO 2 nanoparticles as face-to-face 2D/2D heterojunction photocatalysts through a simple electrostatic self-assembly method. Compared with g-C 3 N 4 and pure TiO 2 nanosheets, 2D/2D TiO 2 /g-C 3 N 4 heterojunctions exhibit effective charge separation and transport properties that translate into outstanding photocatalytic performances. With the optimized heterostructure composition, stable hydrogen evolution activities are threefold and fourfold higher than those of pure TiO 2, and g-C 3 N 4 are consistently obtained. Benefiting from the favorable 2D/2D heterojunction structure, the TiO 2 /g-C 3 N 4 photocatalyst yields H 2 evolution rates up to 3875 μmol·g −1 ·h −1 with an AQE of 7.16% at 380 nm.
Author Xiao, Ke
Wang, Xiang
Arbiol, Jordi
Zhang, Chaoqi
Li, Baoying
Cabot, Andreu
Du, Ruifeng
Han, Xu
AuthorAffiliation 3 Shandong Provincial Key Laboratory of Molecular Engineering, State Key Laboratory of Biobased Material and Green Papermaking, School of Chemistry and Chemical Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
4 Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Barcelona, Spain; xuhan@irec.cat (X.H.); arbiol@icrea.cat (J.A.)
1 Catalonia Energy Research Institute—IREC, Sant Adrià de Besòs, 08930 Barcelona, Spain; ruifengdu@irec.cat (R.D.); kexiao@irec.cat (K.X.); xwang@irec.cat (X.W.); czhang@irec.cat (C.Z.)
5 ICREA, Pg. Lluis Companys 23, 08010 Barcelona, Spain
2 Departament d’Enginyeria Electrònica i Biomèdica, Universitat de Barcelona, 08028 Barcelona, Spain
AuthorAffiliation_xml – name: 2 Departament d’Enginyeria Electrònica i Biomèdica, Universitat de Barcelona, 08028 Barcelona, Spain
– name: 1 Catalonia Energy Research Institute—IREC, Sant Adrià de Besòs, 08930 Barcelona, Spain; ruifengdu@irec.cat (R.D.); kexiao@irec.cat (K.X.); xwang@irec.cat (X.W.); czhang@irec.cat (C.Z.)
– name: 4 Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Barcelona, Spain; xuhan@irec.cat (X.H.); arbiol@icrea.cat (J.A.)
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Snippet Photocatalytic hydrogen evolution is considered one of the promising routes to solve the energy and environmental crises. However, developing efficient and...
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SubjectTerms 2D/2D heterojunction
Aqueous solutions
Carbon nitride
charge separation
Composite materials
Ethanol
Evolution
Heterojunctions
Heterostructures
Hydrogen
Hydrogen evolution
Ligands
Light
Morphology
Nanoparticles
Nanosheets
Photocatalysis
Photocatalysts
Scanning electron microscopy
Self-assembly
Semiconductors
Titanium dioxide
Transport properties
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Title 2D/2D Heterojunction of TiO2 Nanoparticles and Ultrathin G-C3N4 Nanosheets for Efficient Photocatalytic Hydrogen Evolution
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Volume 12
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