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

Vietnam Journal of Catalysis and Adsorption - Tập 10 Số 3 - Trang 113-120 - 2021
Nguyen Hoang Hao1, Dao Thi Tuan2, Phung Thi Lan2, Nguyen Thi Mo2, Nguyen Ngoc Ha2, Nguyen Thi Thu Ha2, Le Minh Cam2
2Faculty of Chemistry, Hanoi National University of Education

Tóm tắt

Nanoflower MoS2, nanowire TiO2(NNW) and 3D MoS2/TiO2 nano-heterostructure have been synthesized successfully by simple typical hydrothermal reaction method followed by 200oC 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 TiO2 NNW is 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.

Từ khóa

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

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Thông tin xuất bản

Vietnam Journal of Catalysis and Adsorption

Tập 10 Số 3

113-120

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