| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Effect of heating time on structural, morphology, optical, and photocatalytic properties of g-C3N4 nanosheets |
| Nguyen Manh Hung1,4, Le Thi Mai Oanh1,2, Lam Thi Hang1,3, Pham Do Chung2, Pham Thi Duyen1,5, Dao Viet Thang1,4, Nguyen Van Minh1,2 |
1 Center for Nano Science and Technology, Hanoi National University of Education, 136 Xuan Thuy Road, Cau Giay District, Hanoi, 100000, Vietnam;
2 Department of Physics, Hanoi National University of Education, 136 Xuan Thuy Road, Cau Giay District, Hanoi, 100000, Vietnam;
3 Faculty of Basic Sciences, Hanoi University of Natural Resources and Environment, 41 A Phu Dien Road, North Tu Liem, Hanoi, 100000, Vietnam;
4 Hanoi University of Mining and Geology, Duc Thang ward, North Tu Liem District, Hanoi, 100000, Vietnam;
5 Military science Academy, 322 Le Trong Tan street, Dinh Cong, Hoang Mai, Hanoi, 100000, Vietnam |
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Abstract Effect of heating time on the structural, morphology, optical, and photocatalytic properties of graphitic carbon nitride (g-C3N4) nanosheets prepared at 550℃ in Ar atmosphere is studied. The investigations are carried out by using x-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), UV-vis absorption, and photoluminescence (PL). At a heating temperature of 550℃, g-C3N4 nanocrystals are formed after 0.5 h and become more orderly as the heating time increases. The surface area of the g-C3N4 nanosheets significantly increases as the preparation time increases. The g-C3N4 prepared in 2.5 h shows the highest photocatalytic performance, decomposing completely 10 ppm RhB solution under xenon lamp irradiation for 2.0 h.
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Received: 13 December 2019
Revised: 02 March 2020
Accepted manuscript online:
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PACS:
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71.20.Nr
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(Semiconductor compounds)
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71.20.Rv
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(Polymers and organic compounds)
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| Fund: Project supported by the scientific and technological project at the level of Ministry of Education, Vietnam (Grant No. B2018-SPH-06-CTrVL). |
Corresponding Authors:
Le Thi Mai Oanh
E-mail: lemaioanh@gmail.com
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Cite this article:
Nguyen Manh Hung, Le Thi Mai Oanh, Lam Thi Hang, Pham Do Chung, Pham Thi Duyen, Dao Viet Thang, Nguyen Van Minh Effect of heating time on structural, morphology, optical, and photocatalytic properties of g-C3N4 nanosheets 2020 Chin. Phys. B 29 057801
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