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首页> 外文期刊>Applied Surface Science >A novel route to porous N-doping carbon grafted carbon nitride for enhanced photocatalytic activity on CO_2 reduction
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A novel route to porous N-doping carbon grafted carbon nitride for enhanced photocatalytic activity on CO_2 reduction

机译：多孔N掺杂碳接枝氮化碳碳碳氮化途径，用于增强CO_2减少的光催化活性

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摘要

Bulk graphitic carbon nitride (g-C3N4) shows inferior photocatalytic performance on CO2 conversion due to low CO2 capture and severe charge carriers recombination. In this work, a porous nitrogen-doping carbon grafted carbon nitride (N-doping carbon/CN) has been fabricated via the temperature-programmed thermal polymerization of urea with carboxyl functionalized polystyrene (HOOC-PS) nanospheres as template and carbon source. A series of characterizations including XRD, XPS, FE-SEM, TEM, BET-BJH and CO2-TPD have been investigated. It is found that, in comparison of bulk g-C3N4 synthesized by direct thermopolymerization of urea, N-doping carbon/CN presents pronounced nanopores, larger surface area and increased basic sites, which result in a high CO2 adsorption of about 5.5 times that on bulk g-C3N4. In addition, XPS results uncover N-doping carbon units have been grafted into g-C3N4 matrix through chemical interactions, which accelerate electron transport on N doping carbon/CN. As a result, porous N-doping carbon/CN exhibits prominent photocatalytic activity on CO2 reduction with water vapor under visible light. The average CO production rate reaches 15.4 mu mol center dot g(1)center dot h(-1), about 7.0 times that on bulk g-C3N4 (2. 2 mu mol center dot g(1)center dot h(-1)).
机译：散装石墨碳氮化物（G-C3N4）显示由于低二氧化碳捕获和严重电荷载流子重组而在二氧化碳转化率上的劣质光催化性能。在这项工作中，通过用羧基官能化聚苯乙烯（HOOC-PS）纳米球作为模板和碳源，通过尿素的温度编程的热聚合来制造多孔氮掺杂碳覆碳碳氮化物（N-掺杂碳/ Cn）。已经调查了一系列特征，包括XRD，XPS，Fe-SEM，TEM，BET-BJH和CO2-TPD。发现，相当于通过尿素的直接热聚合合成的体G-C3N4，N-掺杂碳/ CN呈现明显的纳米孔，较大的表面积和增加的基本位点，这导致高CO 2吸附约5.5倍的约5.5倍散装G-C3N4。此外，通过化学相互作用将XPS结果揭开N-掺杂碳单元已接枝到G-C3N4基质中，该化学相互作用加速了N掺杂碳/ CN的电子传输。结果，多孔N-掺杂碳/ CN在可见光下的水蒸气中表现出突出的光催化活性。平均CO生产率达到15.4μmol中心点G（1）中央点H（-1），约7.0倍，在散装G-C3N4上（2.2μmol中心点G（1）中心点H（-1 ）））。

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  • 来源
    《Applied Surface Science》 |2021年第2期|148411.1-148411.9|共9页
  • 作者

    Liu Bing; Liu Mengping; Tian Lihong; Guo Fei; Xia Yu; Wang Tianlong; Hu Wei; Guan Rong;

  • 作者单位

    Hubei Univ Key Lab Synth & Applicat Organ Funct Mol Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Educ Wuhan 430062 Peoples R China;

    Hubei Univ Key Lab Synth & Applicat Organ Funct Mol Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Educ Wuhan 430062 Peoples R China;

    Hubei Univ Key Lab Synth & Applicat Organ Funct Mol Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Educ Wuhan 430062 Peoples R China;

    Hubei Univ Key Lab Synth & Applicat Organ Funct Mol Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Educ Wuhan 430062 Peoples R China;

    Hubei Univ Key Lab Synth & Applicat Organ Funct Mol Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Educ Wuhan 430062 Peoples R China;

    Hubei Univ Key Lab Synth & Applicat Organ Funct Mol Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Educ Wuhan 430062 Peoples R China;

    Hubei Univ Key Lab Synth & Applicat Organ Funct Mol Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Educ Wuhan 430062 Peoples R China;

    Hubei Univ Key Lab Synth & Applicat Organ Funct Mol Hubei Collaborat Innovat Ctr Adv Organochem Mat Minist Educ Wuhan 430062 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Porous carbon nitride; Nitrogen-doping carbon; Photocatalytic; CO2 reduction;

    机译：多孔碳氮化物;氮掺杂碳;光催化;CO2减少;

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