Effect of Nitrogen-Doped Carbon Dots (NCDs) on the Characteristics of NCD/MIL-53(Fe) Composite and Its Photocatalytic Performance for Methylene Blue Degradation under Visible Light | Zendy

Ngoc Tue Nguyen | Zendy; Xuan Truong Nguyen | Zendy; Nguyễn Đức Trung | Zendy; Tran Hong Minh | Zendy; Thi May Nguyen | Zendy; Tran Thuong Quang | Zendy

Open Access

Effect of Nitrogen-Doped Carbon Dots (NCDs) on the Characteristics of NCD/MIL-53(Fe) Composite and Its Photocatalytic Performance for Methylene Blue Degradation under Visible Light

Author(s) -

Ngoc Tue Nguyen,

Xuan Truong Nguyen,

Nguyễn Đức Trung,

Tran Hong Minh,

Thi May Nguyen,

Tran Thuong Quang

Publication year - 2021

Publication title -

adsorption science and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.682

H-Index - 36

eISSN - 2048-4038

pISSN - 0263-6174

DOI - 10.1155/2021/5906248

Subject(s) - photocatalysis , methylene blue , composite number , catalysis , carbon fibers , degradation (telecommunications) , visible spectrum , metal organic framework , doping , chemistry , band gap , chemical engineering , materials science , nanotechnology , nuclear chemistry , composite material , adsorption , organic chemistry , optoelectronics , telecommunications , computer science , engineering

Metal-organic framework composites, which are combined from metal-organic framework and advanced carbon material, have drawn great attention in many fields of application such as environmental remediation and catalysts. Within this paper, the carbon/MIL-53(Fe) composite was fabricated via an in situ synthesis, in which N-containing carbon dots (NCDs) were mixed with MOF precursors’ solutions under various ratios before going through the solvothermal stage. It was showed that the introduction of a certain amount of NCDs would affect characteristic features and improve the photocatalytic performance of final products. The optimal doping content of NCDs in NCD/MIL-53(Fe) composite was determined. SEM images showed that the M-140 appeared as hexagonal bipyramid-shaped crystals with an average size of 700 nm. Compared with pristine MIL-53(Fe), the M-140 was more visibly light-responsive, and its calculated band gap energy was approximately 2.3 eV. In addition, M-140 catalyst also displayed more excellent photocatalytic activity for Methylene Blue degradation in a pH range from 5 to 7. Under optimal conditions, MB was achieved within 60 minutes and the removal rate was nearly 100% after 5 cycles. The photocatalytic mechanism of the obtained NCD/MIL-53(Fe) composite was discussed.

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