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首页> 外文期刊>Materials Research Bulletin >Synthesis of Z-Scheme heterojunction ZnNb_2O_6/g-C_3N_4 nanocomposite as a high efficient photo-catalyst for the degradation of 2,4-DCP under simulated sunlight
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Synthesis of Z-Scheme heterojunction ZnNb_2O_6/g-C_3N_4 nanocomposite as a high efficient photo-catalyst for the degradation of 2,4-DCP under simulated sunlight

机译：在模拟阳光下为Z-SchementZnBβ0_6/ G-C_3N_4纳米复合物作为高效光催化剂的高效光催化剂的优化光催化剂，如模拟阳光下的2,4-DCP降解

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摘要

In view of the deterioration of the environment and the shortage of resources, it is necessary to develop efficient photocatalysts for the degradation of organic pollutants. Herein, a novel and environmentally friendly ZnNb2O6/g-C3N4 heterojunction nanocomposite was synthesized by calcination-hydrothermal method successfully. The chemical and physical capabilities of the material were characterized by various kinds of analytical instruments. Compared with ZnNb2O6 and g-C3N4, ZnNb2O6/g-C3N4 showed the strongest photocatalytic activity. The nanomaterial was used in the removal of the pollutant 2,4-DCP. The effects of degradation conditions were discussed including component ratio, material dosage, initial analyze concentration, pH and salinity. After 180 min' simulated sunlight illumination, the removal efficiency of 2,4-DCP (10 mg/L) reached 95.7% under the optimum condition. Furthermore, the possible photocatalytic mechanisms were discussed according to four aspects: (i) The conformation of the active species; (ii) The calculation of valence and conduction band; (iii) The analysis Z-scheme heterojunction mechanism; (iv) The speculation of feasible photocatalytic paths. In conclusion, the ZnNb2O6/g-C3N4 (ZC-7) nanocomposite has the least recombination rate of electron-hole pairs and the highest photocatalytic efficiency.
机译：鉴于环境恶化和资源短缺，有必要为有机污染物的降解开发有效的光催化剂。本文，通过成功煅烧 - 水热法合成了一种新颖的和环保型ZnNB2O6 / G-C3N4杂结纳米复合材料。材料的化学和物理能力是通过各种分析仪器的特征。与ZnNB2O6和G-C3N4相比，ZnNB2O6 / G-C3N4显示出最强的光催化活性。纳米材料用于除去污染物2,4-DCP。讨论了降解条件的影响，包括组分比，物质剂量，初始分析浓度，pH和盐度。在180分钟的模拟阳光照射后，在最佳条件下，2,4-DCP（10mg / L）的去除效率达到95.7％。此外，根据四个方面讨论了可能的光催化机制：（i）活性物种的构象; （ii）计算价和传导带; （iii）分析Z方案异质结机制; （iv）可行光催化路径的猜测。总之，ZnNB2O6 / G-C3N4（ZC-7）纳米复合材料具有最小的电子 - 空穴对复合速率和最高的光催化效率。

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  • 来源
    《Materials Research Bulletin》 |2020年第10期|110939.1-110939.8|共8页
  • 作者

    Gu Xinyue; Mei Jie; Lai Jiahao; Lv Siying; Yang Jing; Cui Shihai; Chen Sen;

  • 作者单位

    Nanjing Normal Univ Jiangsu Collaborat Innovat Ctr Biomed Funct Mat Jiangsu Prov Key Lab Mat Cycling & Pollut Control Coll Chem & Mat Sci Jiangsu Key Lab Biomed Mat 1 Wenyuan Rd Nanjing 210023 Peoples R China;

    Nanjing Normal Univ Taizhou Coll Nanjing 225300 Peoples R China;

    Nanjing Normal Univ Jiangsu Collaborat Innovat Ctr Biomed Funct Mat Jiangsu Prov Key Lab Mat Cycling & Pollut Control Coll Chem & Mat Sci Jiangsu Key Lab Biomed Mat 1 Wenyuan Rd Nanjing 210023 Peoples R China;

    Nanjing Normal Univ Jiangsu Collaborat Innovat Ctr Biomed Funct Mat Jiangsu Prov Key Lab Mat Cycling & Pollut Control Coll Chem & Mat Sci Jiangsu Key Lab Biomed Mat 1 Wenyuan Rd Nanjing 210023 Peoples R China;

    Nanjing Normal Univ Jiangsu Collaborat Innovat Ctr Biomed Funct Mat Jiangsu Prov Key Lab Mat Cycling & Pollut Control Coll Chem & Mat Sci Jiangsu Key Lab Biomed Mat 1 Wenyuan Rd Nanjing 210023 Peoples R China;

    Nanjing Normal Univ Jiangsu Collaborat Innovat Ctr Biomed Funct Mat Jiangsu Prov Key Lab Mat Cycling & Pollut Control Coll Chem & Mat Sci Jiangsu Key Lab Biomed Mat 1 Wenyuan Rd Nanjing 210023 Peoples R China;

    Nanjing Res Acad Environm Sci 175 Huju Rd Nanjing 210013 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    ZnNb2O6/g-C3N4 nanocomposite; 2,4-dichlorophenol; Photocatalytic degradation; Z-Scheme heterojunction; Degradation mechanism;

    机译：ZnNB2O6 / G-C3N4纳米复合材料;2,4-二氯苯酚;光催化降解;Z形方案异质结;降解机制;

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