Photocatalytic Reduction of Cr (VI) over g-C3N4 Photocatalysts Synthesized by Different Precursors

Graphitic carbon nitride (g-C3N4) photocatalysts were synthesized via a one-step pyrolysis process using melamine, dicyandiamide, thiourea, and urea as precursors. The obtained g-C3N4 materials exhibited a si...

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Autores principales:	Juan Liang, Chengjun Jing, Jiarong Wang, Yupawang Men
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Cr (VI) reduction photocatalytic g-C<sub>3</sub>N<sub>4</sub> precursors nanosheet morphology surface characteristics Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/a20981cdfe614b55a0aa72c83427ff09
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spelling	oai:doaj.org-article:a20981cdfe614b55a0aa72c83427ff092021-11-25T18:29:27ZPhotocatalytic Reduction of Cr (VI) over g-C<sub>3</sub>N<sub>4</sub> Photocatalysts Synthesized by Different Precursors10.3390/molecules262270541420-3049https://doaj.org/article/a20981cdfe614b55a0aa72c83427ff092021-11-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/22/7054https://doaj.org/toc/1420-3049Graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) photocatalysts were synthesized via a one-step pyrolysis process using melamine, dicyandiamide, thiourea, and urea as precursors. The obtained g-C<sub>3</sub>N<sub>4</sub> materials exhibited a significantly different performance for the photocatalytic reduction of Cr(VI) under white light irradiation, which is attributed to the altered structure and occupancies surface groups. The urea-derived g-C<sub>3</sub>N<sub>4</sub> with nanosheet morphology, large specific surface area, and high occupancies of surface amine groups exhibited superior photocatalytic activity. The nanosheet morphology and large surface area facilitated the separation and transmission of charge, while the high occupancies of surface amine groups promoted the formation of hydrogen adsorption atomic centers which were beneficial to Cr(VI) reduction. Moreover, the possible reduction pathway of Cr(VI) to Cr(III) over the urea-derived g-C<sub>3</sub>N<sub>4</sub> was proposed and the reduction process was mainly initiated by a direct reduction of photogenerated electrons.Juan LiangChengjun JingJiarong WangYupawang MenMDPI AGarticleCr (VI) reductionphotocatalyticg-C<sub>3</sub>N<sub>4</sub> precursorsnanosheet morphologysurface characteristicsOrganic chemistryQD241-441ENMolecules, Vol 26, Iss 7054, p 7054 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Cr (VI) reduction photocatalytic g-C<sub>3</sub>N<sub>4</sub> precursors nanosheet morphology surface characteristics Organic chemistry QD241-441
spellingShingle	Cr (VI) reduction photocatalytic g-C<sub>3</sub>N<sub>4</sub> precursors nanosheet morphology surface characteristics Organic chemistry QD241-441 Juan Liang Chengjun Jing Jiarong Wang Yupawang Men Photocatalytic Reduction of Cr (VI) over g-C<sub>3</sub>N<sub>4</sub> Photocatalysts Synthesized by Different Precursors
description	Graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) photocatalysts were synthesized via a one-step pyrolysis process using melamine, dicyandiamide, thiourea, and urea as precursors. The obtained g-C<sub>3</sub>N<sub>4</sub> materials exhibited a significantly different performance for the photocatalytic reduction of Cr(VI) under white light irradiation, which is attributed to the altered structure and occupancies surface groups. The urea-derived g-C<sub>3</sub>N<sub>4</sub> with nanosheet morphology, large specific surface area, and high occupancies of surface amine groups exhibited superior photocatalytic activity. The nanosheet morphology and large surface area facilitated the separation and transmission of charge, while the high occupancies of surface amine groups promoted the formation of hydrogen adsorption atomic centers which were beneficial to Cr(VI) reduction. Moreover, the possible reduction pathway of Cr(VI) to Cr(III) over the urea-derived g-C<sub>3</sub>N<sub>4</sub> was proposed and the reduction process was mainly initiated by a direct reduction of photogenerated electrons.
format	article
author	Juan Liang Chengjun Jing Jiarong Wang Yupawang Men
author_facet	Juan Liang Chengjun Jing Jiarong Wang Yupawang Men
author_sort	Juan Liang
title	Photocatalytic Reduction of Cr (VI) over g-C<sub>3</sub>N<sub>4</sub> Photocatalysts Synthesized by Different Precursors
title_short	Photocatalytic Reduction of Cr (VI) over g-C<sub>3</sub>N<sub>4</sub> Photocatalysts Synthesized by Different Precursors
title_full	Photocatalytic Reduction of Cr (VI) over g-C<sub>3</sub>N<sub>4</sub> Photocatalysts Synthesized by Different Precursors
title_fullStr	Photocatalytic Reduction of Cr (VI) over g-C<sub>3</sub>N<sub>4</sub> Photocatalysts Synthesized by Different Precursors
title_full_unstemmed	Photocatalytic Reduction of Cr (VI) over g-C<sub>3</sub>N<sub>4</sub> Photocatalysts Synthesized by Different Precursors
title_sort	photocatalytic reduction of cr (vi) over g-c<sub>3</sub>n<sub>4</sub> photocatalysts synthesized by different precursors
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a20981cdfe614b55a0aa72c83427ff09
work_keys_str_mv	AT juanliang photocatalyticreductionofcrviovergcsub3subnsub4subphotocatalystssynthesizedbydifferentprecursors AT chengjunjing photocatalyticreductionofcrviovergcsub3subnsub4subphotocatalystssynthesizedbydifferentprecursors AT jiarongwang photocatalyticreductionofcrviovergcsub3subnsub4subphotocatalystssynthesizedbydifferentprecursors AT yupawangmen photocatalyticreductionofcrviovergcsub3subnsub4subphotocatalystssynthesizedbydifferentprecursors
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Photocatalytic Reduction of Cr (VI) over g-C<sub>3</sub>N<sub>4</sub> Photocatalysts Synthesized by Different Precursors

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