赵路, 于炳坤, 王亮. NiS/g-C3N4的合成及其可见光催化制H2O2性能的研究[J]. 燃料化学学报(中英文). DOI: 10.3724/2097-213X.2024.JFCT.0017
引用本文: 赵路, 于炳坤, 王亮. NiS/g-C3N4的合成及其可见光催化制H2O2性能的研究[J]. 燃料化学学报(中英文). DOI: 10.3724/2097-213X.2024.JFCT.0017
ZHAO Lu, YU Bingkun, WANG Liang. Preparation of NiS/g-C3N4 and its performance of H2O2 production under visible light[J]. Journal of Fuel Chemistry and Technology. DOI: 10.3724/2097-213X.2024.JFCT.0017
Citation: ZHAO Lu, YU Bingkun, WANG Liang. Preparation of NiS/g-C3N4 and its performance of H2O2 production under visible light[J]. Journal of Fuel Chemistry and Technology. DOI: 10.3724/2097-213X.2024.JFCT.0017

NiS/g-C3N4的合成及其可见光催化制H2O2性能的研究

Preparation of NiS/g-C3N4 and its performance of H2O2 production under visible light

  • 摘要: 光催化合成H2O2因其绿色、可持续的优点而备受关注,其中构建高效的光催化剂是关键,石墨相g-C3N4作为新型半导体材料,其具有良好的热稳定性、化学稳定性和可见光响应能力,逐渐发展成为光催化研究领域的一个研究热点,本论文采用浸渍法制备了NiS/g-C3N4光催化剂,表征结果表明,NiS的引入增加了g-C3N4的反应活性位点,构建了丰富的电荷传输通道,有利于界面光生载流子的迁移与分离。NiS/g-C3N4用于在可见光下光催化合成H2O2,此过程不需要引入额外的牺牲剂。实验结果表明,NiS/g-C3N4(3%)在120 min内H2O2产量可达到141.81 μM,是块状g-C3N4的3.8倍。通过所制备样品光催化产H2O2的循环实验,对其稳定性进行了研究。采用光催化产H2O2反应过程中活性基团的捕获实验来探究光催化反应的机理,基于结果分析提出了NiS/g-C3N4异质结光催化产H2O2可能的双通道机理

     

    Abstract: Photocatalytic H2O2 production has attracted much attention due to its green and sustainable advantages, in which constructing an efficient photocatalyst is the key. As a new semiconductor material, g-C3N4 has the advantages of good thermal stability, chemical stability and visible light response ability. Therefore, g-C3N4 has gradually become a research hotspot in the field of photocatalysis. In this paper, NiS/g-C3N4 is successfully prepared NiS/g-C3N4 by impregnation method, and the characterization indicates that the introduction of NiS increases the reactive sites of g-C3N4 and constructs abundant charge transport channels, which is conducive to the migration and separation of photogenerated carriers at the interface. The synthesized NiS/g-C3N4 was used for the photocatalytic H2O2 production under visible light without the introduction of additional sacrificial agents. The results show that H2O2 yield of NiS/g-C3N4 (3%) can reach 141.81 μM in 120 min, which is 3.8 times higher than that of bulk g-C3N4.The stability of the prepared samples was investigated by cycling experiments of photocatalytic H2O2 production. The trapping agent experiment of the active group in the photocatalytic hydrogen peroxide production is carried out. Based on the analysis of the results, the possible photocatalytic mechanism of the photocatalytic hydrogen peroxide production by NiS/g-C3N4 heterojunction is proposed.

     

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