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A one-step deep eutectic solvents assisted synthesis of carbon nitride/metal oxide composites for photocatalytic nitrogen fixation

Abstract

Nitrogen fixation remains a challenge from both academic and industrial backgrounds. Photocatalysis based on versatile semiconductors is a promising route for nitrogen fixation under mild condition. In this study, for the first time, a ternary deep eutectic solvents (DESs) strategy was developed for scalable synthesis of g-C3N4/metal oxide composites. A series of g-C3N4/metal oxide composites were prepared by a facile one-step calcination process using ternary DES containing urea, melamine and metal chlorides. Moreover, since DES is a homogeneous solution, the metal oxide after pyrolysis can be uniformly supported on the g-C3N4 nanosheet. This greatly increases the site of photocatalysis and increases the catalytic efficiency. These composites show extraordinary photocatalytic effects for the reduction of nitrogen at atmospheric environment. With g-C3N4/40 wt. % Fe2O3 as the photocatalyst, the maximum efficiency for ammonia generation can reach 4380 μmol·L-1·h-1, which is the best yield to our best knowledge. The highly photocatalytic activity may be attributed to the efficient interfacial interaction between 2D g-C3N4 nanosheets and Fe2O3 nanoparticles, which promotes the transfer and separation efficiency of the charge carriers.

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Publication details

The article was received on 04 Dec 2018, accepted on 06 Feb 2019 and first published on 06 Feb 2019


Article type: Paper
DOI: 10.1039/C8TA11681D
Citation: J. Mater. Chem. A, 2019, Accepted Manuscript

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    A one-step deep eutectic solvents assisted synthesis of carbon nitride/metal oxide composites for photocatalytic nitrogen fixation

    H. Mou, J. Wang, D. Zhang, D. Yu, W. Chen, D. Wang and T. Mu, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C8TA11681D

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