Ultrathin nanosheets g-C3N4@Bi2WO6 core-shell structure via low temperature reassembled strategy to promote photocatalytic activity

By Yingying Wang, Wenjun Jiang, Wenjia Luo, Xianjie Chen, Yongfa Zhu. Applied Catalysis B: Environmental, 2018

151 citations recorded by the source corpus.

Abstract In this work, ultrathin nanosheet g-C3N4@Bi2WO6 core-shell structure is fabricated by a new method of CN precursor in situ coating and low temperature reassembled. The CN small molecules were successfully polymerized to form ultrathin g-C3N4 layer (about 1 nm) on the surface of Bi2WO6 nanosheet under low temperature. And the g-C3N4@Bi2WO6 photocatalyst with 1 nm thickness of shell layers has the highest photocatalytic degradation phenol activity with visible light irradiation which is almost 5.7 times as high as that of bulk g-C3N4 and also 1.9 times compare to Bi2WO6 nanosheet. Simultaneously, phenol degradation activity by using g-C3N4@Bi2WO6 photocatalyst under full spectrum is 3.3 times that of bulk g-C3N4 and 1.5 times that of Bi2WO6 nanosheet. Superoxide radicals ( O2−) and hydroxyl radicals ( OH) as the main oxidative species proved by electron spin resonance spectroscopy (ESR). The interface catalytic system was found, that is the interface between the Bi2WO6 core and g-C3N4 shell effectively promote the phenol degradation activity revealed through a comprehensive contrast experiment. The establishment of g-C3N4@Bi2WO6 core-shell catalytic system can offer blueprints for the construction of other new interface catalytic system.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/6c4ff516eea01c21550a074dffedd8ab4ee95e1a

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In Electrical and Electronic Engineering

1. Huaming Li
2. Yongfa Zhu
3. Hui Xu
4. W. Yao
5. Hua Tang
6. Jingsan Xu
7. Xiaofei Yang
8. Juan-Yu Yang

In Materials Chemistry

1. Huaming Li
2. Hui Xu
3. Hua Tang
4. Qinqin Liu
5. W. Yao
6. Xiaofei Yang
7. Yongfa Zhu
8. H. Miao

In Renewable Energy, Sustainability and the Environment

1. Huaming Li
2. Hui Xu
3. Yongfa Zhu
4. W. Yao
5. Hua Tang
6. Qinqin Liu
7. Xiaofei Yang
8. H. Miao

Citations in the corpus

• Enhanced organic pollutant photodegradation via adsorption/photocatalysis synergy using a 3D g-C3N4/TiO2 free-separation photocatalyst (2019, background): “The arc radius of the gC3N4/TiO2 sample are much smaller than bulk g-C3N4 and g-C3N4/ TiO2-mix, reflecting that the resistance of the solid-state interface layer and the barrier of the charge transfer on the surface are decreased in the g-C3N4/TiO2 samples [41,42].”
• Unveiling the origin of boosted photocatalytic hydrogen evolution in simultaneously (S, P, O)-Codoped and exfoliated ultrathin g-C3N4 nanosheets (2019, background): “Among various visible-light-driven photocatalysts, metal-free polymeric graphitic carbon nitride (g-C3N4) has attracted huge interest due to its suitable band structure for hydrogen production reaction (HER), high thermal and chemical stability as well as low cost [7-17].”