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首页> 外文期刊>RSC Advances >The effect of metallic Fe(II) and nonmetallic S codoping on the photocatalytic performance of graphitic carbon nitride
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The effect of metallic Fe(II) and nonmetallic S codoping on the photocatalytic performance of graphitic carbon nitride

机译：金属Fe（II）和非金属谱对石墨氮化物光催化性能的影响

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摘要

The metallic Fe(II) ion and nonmetallic S codoped g-C3N4 photocatalyst was synthesized through the polymerization of melamine, ferrous chloride and trithiocyanuric acid (TCA) at elevated temperature. The performance of Fe(II)-S codoped g-C3N4 compounds in RhB photocatalytic degradation was found to increase 5 times. This significant enhancement in catalytic activity is probably related to the enhanced visible light adsorption and the mobility of photoinduced electron/hole pairs, attributable to bandgap narrowing and also lowering in the surface electrostatic potential compared to that of the pure g-C3N4 nanosheets. XRD and XPS results indicate that the Fe species binds with N-atoms to form Fe-N bonds in the state of Fe(II) ions. Fe(II) doping increases the specific surface area, and enhances the photoinduced electron/hole pairs illustrated by PL, EIS spectra and transient photocurrent response measurements. The theoretical results show that divalent Fe(II) ions coordinating in the pore centre among three triazine units form discrete dopant bands and S dopants substituting the N in triazine skeletons excite much stronger delocalized HOMO and LUMO states, facilitating the migration of photogenerated charge carriers, thus enhancing the visible-light driven photocatalytic performance.
机译：通过在升高的温度下聚合三聚氰胺，亚铁和三氰脲酸（TCA）来合成金属Fe（II）离子和非金属SCOPOPED G-C3N4光催化剂。发现Fe（II）-S的Fe（II）的性能G-C3N4化合物在rHB光催化降解中增加5次。这种催化活性的显着增强可能与增强的可见光吸附和光致电子/空穴对的迁移率有关，与纯G-C3N4纳米晶片相比，由于纯G-C3N4纳米晶片相比，归因于带隙变窄和降低表面静电电位。 XRD和XPS结果表明Fe物种与N-原子结合，以在Fe（II）离子的状态下形成Fe-N键。 Fe（ii）掺杂增加了比表面积，并增强了通过PL，EIS光谱和瞬态光电流响应测量所示的光诱导的电子/空穴对。理论结果表明，三个三嗪单位中孔中心的二价Fe（II）离子在三嗪骨架中的三个三嗪单位中的掺杂剂中促进了更强大的划分的冠状型和Lumo状态，促进了光生电荷载体的迁移，从而提高可见光驱动的光催化性能。

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  • 来源
    《RSC Advances》 |2018年第14期|共11页
  • 作者

    Dou Hailong; Zheng Shaohui; Zhang Yongping;

  • 作者单位

    Southwest Univ Fac Mat &

    Energy Chongqing 400715 Peoples R China;

    Southwest Univ Fac Mat &

    Energy Chongqing 400715 Peoples R China;

    Southwest Univ Fac Mat &

    Energy Chongqing 400715 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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