Study on the synthesis of heterostructure MoS2/TiO2 material for photocatalytic degradation of 2,4-dichlorophenoxyacetic acid

Nguyen Hoang Hao; Dao Thi Tuan; Phung Thi Lan; Nguyen Thi Mo; Nguyen Ngoc Ha; Nguyen Thi Thu Ha; Le Minh Cam

doi:10.51316/jca.2021.059

Authors

Nguyen Hoang Hao Vinh University Author
Dao Thi Tuan Faculty of Chemistry, Hanoi National University of Education Author
Phung Thi Lan Faculty of Chemistry, Hanoi National University of Education Author
Nguyen Thi Mo Faculty of Chemistry, Hanoi National University of Education Author
Nguyen Ngoc Ha Faculty of Chemistry, Hanoi National University of Education Author
Nguyen Thi Thu Ha Faculty of Chemistry, Hanoi National University of Education Author
Le Minh Cam Faculty of Chemistry, Hanoi National University of Education Author

DOI:

https://doi.org/10.51316/jca.2021.059

Keywords:

2,4-D, heterostructure, nanoflower MoS2, nanowire TiO2

Abstract

Nanoflower MoS₂, nanowire TiO₂(NNW) and 3D MoS₂/TiO₂ nano-heterostructure have been synthesized successfully by simple typical hydrothermal reaction method followed by 200^oC calcination under an argon atmosphere. The prepared samples are characterized in detail by XRD, FESEM, UV-vis DRS, EDX and BET. The results suggest that the TiO₂NNWis successfully coupled with MoS₂ to form the heterojunction nanostructure. The hybrid heterostructures can effectively utilize visible-light and solar energy to degrade 2,4-dichlorophenoxyacetic acid (2,4-D). The degradation rate of 2,4-D is as high as 99%. The improved photocatalytic activity owes to the decreased band-gap and the heterosurface properties of MoS₂/TiO₂, promoting the electron-hole pairs separation and absorption capacity to visible light. This work presents a facile approach for fabricating the MoS₂/TiO₂ heterostructures for efficient photocatalytic 2,4-D solution, which will facilitate the development of designing photo catalysts applied in environment and energy.

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