Synthesis of g-C3N4/Au nanocomposite as a photocatalyst for hydrogen generation

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HASSANZADEH TABRIZI SEYED ALI; OMIDI MAHDI

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Journal: JOURNAL OF NEW MATERIALS Year:2020 | Volume:10 | Issue:2 (38) Page(s): 67-78

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Information Journal Paper

Title

Synthesis of g-C3N4/Au nanocomposite as a photocatalyst for hydrogen generation

Author(s)

HASSANZADEH TABRIZI SEYED ALI | OMIDI MAHDI | Issue Writer Certificate

Keywords

Graphitic carbon nitrideQ1

GoldQ2

PhotocatalystQ2

Heat-treatmentQ2

Hydrogen generationQ1

Abstract

In this study, g-C3N4 was prepared and the effects of two-step heat treatment on its structure and photocatalytic properties were investigated. This material was then coated with Gold nanoparticles by light deposition method and the composite was examined. The photocatalytic activity of the synthesized materials was also studied for Hydrogen generation using sunlight and water. Characterization of the synthesized powders was carried out using various techniques such as X-ray diffraction, transmitted electron microscopy TEM, surface area analysis (BET) and ultraviolet-visible spectrometry (UV-Vis). X-ray diffraction showed that Graphitic carbon nitride has a crystalline structure and its crystallinity is reduced after two stages of thermal treatment which is due to oxidation of Graphitic carbon nitride. In addition, X-ray diffraction confirms the successful sedimentation of Gold on Graphitic carbon nitride. Transmission electron microscopy images show Gold nanoparticles having particle size of about 8 nm. The study of UV-Visible absorption spectra of the synthesized powders showed that after two stages of heat treatment, the band gap of the samples increased and the presence of Gold nanoparticles increased the light absorption in the visible light region via the surface plasmon resonance phenomenon. The specific surface area of the samples after two steps heat treatment and after applying of the Gold nanoparticles increased from 4. 2 to 15. 7 and 29. 3 m2/g, respectively. Graphitic carbon nitride with two steps heat treatment and coated with Gold nanoparticles produced about 1128 μ mol g-1 h-1 under sunlight. The photocatalytic mechanism of the system for the production of hydrogen gas was discussed.

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APA: Copy

HASSANZADEH TABRIZI, SEYED ALI, & OMIDI, MAHDI. (2020). Synthesis of g-C3N4/Au nanocomposite as a photocatalyst for hydrogen generation. JOURNAL OF NEW MATERIALS, 10(2 (38) ), 67-78. SID. https://sid.ir/paper/169942/en

Vancouver: Copy

HASSANZADEH TABRIZI SEYED ALI, OMIDI MAHDI. Synthesis of g-C3N4/Au nanocomposite as a photocatalyst for hydrogen generation. JOURNAL OF NEW MATERIALS[Internet]. 2020;10(2 (38) ):67-78. Available from: https://sid.ir/paper/169942/en

IEEE: Copy

SEYED ALI HASSANZADEH TABRIZI, and MAHDI OMIDI, “Synthesis of g-C3N4/Au nanocomposite as a photocatalyst for hydrogen generation,” JOURNAL OF NEW MATERIALS, vol. 10, no. 2 (38) , pp. 67–78, 2020, [Online]. Available: https://sid.ir/paper/169942/en

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