Effect of Al(OH)3 prepared from fly ash on the structural and catalytic properties of g-C3N4-based materials

doi:10.1016/j.cjche.2024.05.026

Chinese Journal of Chemical Engineering ›› 2024, Vol. 74 ›› Issue (10): 44-51.DOI: 10.1016/j.cjche.2024.05.026

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Effect of Al(OH)₃ prepared from fly ash on the structural and catalytic properties of g-C₃N₄-based materials

Qingbo Yu^1,3, Xianhua Li¹, Qingping Wang^2,3

1 The First Affiliated Hospital of Anhui University of Science and Technology (Huainan First People's Hospital), Anhui University of Science and Technology, Huainan 232001, China;
2 Anhui Industrial Generic Technology Research Center for New Materials from Coal-based Solid Wastes, Huainan 232001, China;
3 School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China

Received:2024-04-03 Revised:2024-04-24 Accepted:2024-05-16 Online:2024-07-10 Published:2024-10-28
Contact: Qingbo Yu,Tel.:+86 13865542653.E-mail:yuqingbo007@163.com
Supported by:
This work was supported by the Medical Special Cultivation Project of Anhui University of Science and Technology (YZ2023H2B012, YZ2023H2B013), the Anhui Provincial Key Research and Development Project (2022i01020015), the University Synergy Innovation Program of Anhui Province (XT-2022-083, GXXT-2023-019), and National Natural Science Foundation of China (52227901).

Effect of Al(OH)₃ prepared from fly ash on the structural and catalytic properties of g-C₃N₄-based materials

Qingbo Yu^1,3, Xianhua Li¹, Qingping Wang^2,3

1 The First Affiliated Hospital of Anhui University of Science and Technology (Huainan First People's Hospital), Anhui University of Science and Technology, Huainan 232001, China;
2 Anhui Industrial Generic Technology Research Center for New Materials from Coal-based Solid Wastes, Huainan 232001, China;
3 School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China

通讯作者: Qingbo Yu,Tel.:+86 13865542653.E-mail:yuqingbo007@163.com
基金资助:
This work was supported by the Medical Special Cultivation Project of Anhui University of Science and Technology (YZ2023H2B012, YZ2023H2B013), the Anhui Provincial Key Research and Development Project (2022i01020015), the University Synergy Innovation Program of Anhui Province (XT-2022-083, GXXT-2023-019), and National Natural Science Foundation of China (52227901).

Abstract

Abstract: In order to find the optimal combination method of secondary utilization of fly ash and graphite-phase carbon nitride (g-C₃N₄) modification, an efficient composite photocatalyst of γ-Al₂O₃/g-C₃N₄ was obtained by calcining the composite precursors of Al(OH)₃/ dicyandiamide (DCDA). The introduction of Al(OH)₃ prepared by combining fly ash into the precursors causes hydrogen-bonding interactions between Al(OH)₃ and DCDA, which facilitate the removal of N atoms from the edges of the CN framework of g-C₃N₄ during condensation, and the composites prepared possess more cyano defects. In addition, γ-Al₂O₃ and g-C₃N₄ form a chemical bond at the interface, and this chemical bonding causes the density of the electron cloud in the vicinity of the N atoms to increase. Among them, the strongest chemical bonding between Al₂O₃ and g-C₃N₄ was observed in ACN-1, whereas the most cyanine defects were formed in ACN-1, which made ACN-1 exhibit the best photocatalytic degradation of methylene blue, which is 2.48 times higher than that of the pristine g-C₃N₄.

Key words: Precursors, g-C₃N₄, Waste treatment, Catalyst, Synthesis

摘要： In order to find the optimal combination method of secondary utilization of fly ash and graphite-phase carbon nitride (g-C₃N₄) modification, an efficient composite photocatalyst of γ-Al₂O₃/g-C₃N₄ was obtained by calcining the composite precursors of Al(OH)₃/ dicyandiamide (DCDA). The introduction of Al(OH)₃ prepared by combining fly ash into the precursors causes hydrogen-bonding interactions between Al(OH)₃ and DCDA, which facilitate the removal of N atoms from the edges of the CN framework of g-C₃N₄ during condensation, and the composites prepared possess more cyano defects. In addition, γ-Al₂O₃ and g-C₃N₄ form a chemical bond at the interface, and this chemical bonding causes the density of the electron cloud in the vicinity of the N atoms to increase. Among them, the strongest chemical bonding between Al₂O₃ and g-C₃N₄ was observed in ACN-1, whereas the most cyanine defects were formed in ACN-1, which made ACN-1 exhibit the best photocatalytic degradation of methylene blue, which is 2.48 times higher than that of the pristine g-C₃N₄.

关键词: Precursors, g-C₃N₄, Waste treatment, Catalyst, Synthesis

Qingbo Yu, Xianhua Li, Qingping Wang. Effect of Al(OH)₃ prepared from fly ash on the structural and catalytic properties of g-C₃N₄-based materials[J]. Chinese Journal of Chemical Engineering, 2024, 74(10): 44-51.

Qingbo Yu, Xianhua Li, Qingping Wang. Effect of Al(OH)₃ prepared from fly ash on the structural and catalytic properties of g-C₃N₄-based materials[J]. 中国化学工程学报, 2024, 74(10): 44-51.

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Effect of Al(OH)₃ prepared from fly ash on the structural and catalytic properties of g-C₃N₄-based materials

Effect of Al(OH)₃ prepared from fly ash on the structural and catalytic properties of g-C₃N₄-based materials

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