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Effective catalytic hydrodechlorination of chlorophenoxyacetic acids over Pd/graphitic carbon nitride

机译：Pd /石墨碳氮乙酸氯苯氧基乙酸的有效催化水解液

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摘要

Catalytic hydrodechlorination (HDC) of chlorophenoxyacetic acids was performed over Pd/graphitic carbon nitride (Pd/g-C3N4) catalysts in the present work. A series of Pd/g-C3N4 catalysts were prepared by a deposition-precipitation method, and characterized by X-ray diffraction (XRD), N-2 adsorption-desorption, transmission electron microscopy (TEM), CO chemisorption and X-ray photoelectron spectroscopy (XPS). The Pd/g-C3N4 catalysts showed excellent activity to convert dichlorophenoxyacetic acid (2,4-D) into phenoxyacetic acid (PA) and the catalytic activity was correlated with the ratio of Pd2+/(Pd-0 + Pd2+) and Pd particle size. In addition, HDC of 2,4-D over Pd/g-C3N4 catalyst followed the Langmuir-Hinshelwood model, indicating an adsorption-controlled mechanism. Other chlorophenoxyacetic acids, such as 2-chlorophenoxyacetic acid (2-CPA), 4-chlorophenoxyacetic acid (4-CPA) and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) could also be completely dechlorinated to PA over Pd/g-C3N4 catalysts.
机译：的氯苯酸催化加氢脱氯（HDC）在目前的工作中在Pd执行/石墨氮化碳（钯/克 - C3N4）催化剂。一系列的Pd / G-C3N4催化剂被沉积 - 沉淀法制备，并且其特征在于通过X射线衍射（XRD），N-2吸附 - 脱附，透射电子显微镜（TEM），CO化学吸附和X射线光电子能谱（XPS）。将Pd /克 - C3N4催化剂显示出优异的活性二氯苯氧乙酸（2,4-d）转化为苯氧基乙酸（PA）和催化活性的Pd 2 + /（PD-0 +加入Pd 2 +）和Pd粒径的比率呈正相关。另外，2,4-d在Pd / G-C3N4催化剂的HDC符合Langmuir-欣谢尔伍德模型，表明吸附控制机制。其他氯苯酸，如2-氯苯氧基乙酸（2-CPA），4-氯苯氧乙酸（4-CPA）和2,4,5-三氯苯氧基乙酸（2,4,5-T）也可以完全脱氯到PA在Pd / G-C3N4催化剂。

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  • 来源
    《RSC Advances》 |2015年第64期|共11页
  • 作者

    Jiang Fang; Tan Wenhui; Chen Huan; Tan Ling; Liu Jingliang;

  • 作者单位

    Nanjing Univ Sci &

    Technol Sch Environm &

    Biol Engn Key Lab Jiangsu Prov Chem Pollut Control &

    Resour Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Sch Environm &

    Biol Engn Key Lab Jiangsu Prov Chem Pollut Control &

    Resour Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Sch Environm &

    Biol Engn Key Lab Jiangsu Prov Chem Pollut Control &

    Resour Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Sch Environm &

    Biol Engn Key Lab Jiangsu Prov Chem Pollut Control &

    Resour Nanjing 210094 Jiangsu Peoples R China;

    Nanjing XiaoZhuang Univ Sch Biochem Environm &

    Engn Nanjing 211171 Jiangsu Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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