Facile synthesis of porous 1,3,5-Trihydroxybenzene substituted g-C3N4 for boosted photocatalytic Rhodamine B degradation and H2O2 production

The reinforced light-harvesting capability, suppressed photocarrier recombination and increased specific surface area represented a possibility of excellent photocatalytic performance for graphitic carbon nitride (g-C3N4)-based photocatalysts. Herein, the porous 1,3,5-Trihydroxybenzene substituted g...

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Bibliographic Details
Published in:Journal of alloys and compounds 2022-12, Vol.925, p.166604, Article 166604
Main Authors: Zhang, Min, Jiang, Yiguo, Xu, Xiuquan, Yu, Xiaofeng, Shen, Wenyan, Luo, Miaomiao, Ding, Luyao, Chen, Haiwen
Format: Article
Language:English
Subjects:
1,3,5-Trihydroxybenzene
Aromatic compounds
Carbon nitride
Graphical representations
H2O2 production
Hydrogen peroxide
Photocatalysis
Photocatalysts
Photodegradation
Pollutants
Porous g-C3N4
Rate constants
Rh B degradation
Rhodamine
Specific surface
Substitutes
Surface area
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Summary:The reinforced light-harvesting capability, suppressed photocarrier recombination and increased specific surface area represented a possibility of excellent photocatalytic performance for graphitic carbon nitride (g-C3N4)-based photocatalysts. Herein, the porous 1,3,5-Trihydroxybenzene substituted g-C3N4 (denoted as PTBCN) composites with superior visible-light-driven photocatalytic properties were rationally constructed via a two-step reaction combination of freeze-drying and thermal-polymerization. The optimal PTBCN-2 achieved the maximum photocatalytic Rhodamine B (Rh B) degradation and H2O2 evolution rate constants, nearly 6.56 and 3.17 times higher than that of bare g-C3N4. The outstanding performances of PTBCN-2 were probably attributed to the extended specific surface area, robust visible light response, adjusted electronic band structure, accelerated separation and transfer of photocarriers as well as good hydrophilicity. As a result, the above integrated merits were directly responsible for the huge superoxide anion (•O2−) generation, which dominated the efficient photocatalytic reactions. This work provided a new idea to design and construct high efficiency porous aromatic ring substituted g-C3N4-related photocatalysts for organic pollutants degradation and H2O2 production. [Display omitted] •Porous TB ring substituted g-C3N4 was rationally constructed.•The PTBCN exhibited excellent photocatalytic performance and stability.•The structure, properties, and the mechanism of improvement were elucidated in detail.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2022.166604