Facile ultrasonic-assisted synthesis of micro-nanosheet structure Bi4Ti3O12/g-C3N4 composites with enhanced photocatalytic activity on organic pollutants

doi:10.1016/j.cjche.2018.02.017

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (12): 2628-2635.DOI: 10.1016/j.cjche.2018.02.017

• Energy, Resources and Environmental Technology • Previous Articles Next Articles

Facile ultrasonic-assisted synthesis of micro-nanosheet structure Bi₄Ti₃O₁₂/g-C₃N₄ composites with enhanced photocatalytic activity on organic pollutants

Huihui Gan¹, Futao Yi^1,2, Huining Zhang¹, Yongxing Qian¹, Huixia Jin¹, Kefeng Zhang¹

1 School of Civil Engineering and Architecture, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China;
2 College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China

Received:2017-11-30 Revised:2018-01-25 Online:2019-01-09 Published:2018-12-28
Contact: Huihui Gan
Supported by:
Supported by the National Natural Science Foundation of China (51509220), the Natural Science Foundation of Zhejiang Province (LQ14E090003), Ningbo Science and Technology Plan Projects (2014C50007, 2014C51003) and Ningbo major social development projects (2017C510006).

Facile ultrasonic-assisted synthesis of micro-nanosheet structure Bi₄Ti₃O₁₂/g-C₃N₄ composites with enhanced photocatalytic activity on organic pollutants

Huihui Gan¹, Futao Yi^1,2, Huining Zhang¹, Yongxing Qian¹, Huixia Jin¹, Kefeng Zhang¹

1 School of Civil Engineering and Architecture, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China;
2 College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China

通讯作者: Huihui Gan
基金资助:
Supported by the National Natural Science Foundation of China (51509220), the Natural Science Foundation of Zhejiang Province (LQ14E090003), Ningbo Science and Technology Plan Projects (2014C50007, 2014C51003) and Ningbo major social development projects (2017C510006).

Abstract

Abstract: The Bi₄Ti₃O₁₂/g-C₃N₄ composites with microsheet and nanosheet structure were prepared through facile ultrasonic-assisted method. The SEM and TEM results suggested that the nanosheets g-C₃N₄ were stacked on the surface of regular Bi₄Ti₃O₁₂ sheets. Comparing with pure Bi₄Ti₃O₁₂ and g-C₃N₄, the Bi₄Ti₃O₁₂/g-C₃N₄ composites showed significant enhancement in photocatalytic efficiency for the degradation of RhB in solution. With the mass ratio of g-C₃N₄ increasing to 10 wt%, the Bi₄Ti₃O₁₂/g-C₃N₄-10% presented the best photocatalytic activity. Its photocatalysis reaction constant was approximately 2 times higher than the single component Bi₄Ti₃O₁₂ or g-C₃N₄. Meanwhile, good stability and durability for the Bi₄Ti₃O₁₂/g-C₃N₄-10% were confirmed by the recycling experiment and FT-IR analysis. The possible mechanism for the improvements was the matched band positions and the effective separation of photo-excited electrons (e^-) and holes (h⁺). Furthermore, based on the results of active species trapping, photo-generated holes (h⁺) and superoxide radical (·O₂^-) could be the main radicals in reaction.

Key words: Rhodamine B, Photocatalyst, Ultrasonic assisted synthesis, Bi₄Ti₃O₁₂, g-C₃N₄

摘要： The Bi₄Ti₃O₁₂/g-C₃N₄ composites with microsheet and nanosheet structure were prepared through facile ultrasonic-assisted method. The SEM and TEM results suggested that the nanosheets g-C₃N₄ were stacked on the surface of regular Bi₄Ti₃O₁₂ sheets. Comparing with pure Bi₄Ti₃O₁₂ and g-C₃N₄, the Bi₄Ti₃O₁₂/g-C₃N₄ composites showed significant enhancement in photocatalytic efficiency for the degradation of RhB in solution. With the mass ratio of g-C₃N₄ increasing to 10 wt%, the Bi₄Ti₃O₁₂/g-C₃N₄-10% presented the best photocatalytic activity. Its photocatalysis reaction constant was approximately 2 times higher than the single component Bi₄Ti₃O₁₂ or g-C₃N₄. Meanwhile, good stability and durability for the Bi₄Ti₃O₁₂/g-C₃N₄-10% were confirmed by the recycling experiment and FT-IR analysis. The possible mechanism for the improvements was the matched band positions and the effective separation of photo-excited electrons (e^-) and holes (h⁺). Furthermore, based on the results of active species trapping, photo-generated holes (h⁺) and superoxide radical (·O₂^-) could be the main radicals in reaction.

关键词: Rhodamine B, Photocatalyst, Ultrasonic assisted synthesis, Bi₄Ti₃O₁₂, g-C₃N₄

Huihui Gan, Futao Yi, Huining Zhang, Yongxing Qian, Huixia Jin, Kefeng Zhang. Facile ultrasonic-assisted synthesis of micro-nanosheet structure Bi₄Ti₃O₁₂/g-C₃N₄ composites with enhanced photocatalytic activity on organic pollutants[J]. Chin.J.Chem.Eng., 2018, 26(12): 2628-2635.

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Facile ultrasonic-assisted synthesis of micro-nanosheet structure Bi₄Ti₃O₁₂/g-C₃N₄ composites with enhanced photocatalytic activity on organic pollutants

Facile ultrasonic-assisted synthesis of micro-nanosheet structure Bi₄Ti₃O₁₂/g-C₃N₄ composites with enhanced photocatalytic activity on organic pollutants

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