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首页> 外文期刊>Journal of Hazardous Materials >In-situ construction of Bi/defective Bi_4NbO_8Cl for non-noble metal based Mott-Schottky photocatalysts towards organic pollutants removal
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In-situ construction of Bi/defective Bi_4NbO_8Cl for non-noble metal based Mott-Schottky photocatalysts towards organic pollutants removal

机译：原位构建BI /缺陷Bi_4nbo_8CL的非贵金属基于Mott-Schottky光催化剂去除有机污染物

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摘要

The strategy to improve the photocatalytic performance is still a challenge for the novel Sillen-Aurivillius perovskite type Bi4NbO8Cl. Herein, heterostructured Bi/Bi4NbO8Cl was fabricated via in-situ solvothermal method, without the additional introduction of Bi-sources. Simultaneously, the amount of oxygen vacancies (OVs) were increased, as the [Bi2O2] blocks released in the solvothermal process to serve as precursors for Bi particles. Due to the large work function of Bi, a Schottky barrier formed at the Bi/Bi4NbO8Cl interface, promoting photoinduced charge separation generated in the Bi4NbO8Cl semiconductor, supplying more holes for the organic compounds decomposition, which could be widely applied in water decontamination. Furthermore, the OVs facilitate the consumption of photo-induced electrons by assisting oxygen activation to produce superoxide radicals (center dot O-2(-)), leaving more holes in the valence band of Bi4NbO8Cl, and thus result in the enhancement of Rhodamine B (RhB) degradation by 1.82 times over Bi/Bi4NbO8Cl photocatalysts. Through the synergistic effect of Bi and OVs, the Bi/Bi4NbO8Cl also exhibits enhanced photocatalytic performance towards various organic water-contaminants, such as methyl orange, acid orange 7, p-nitrophenol and tetracycline hydrochloride.
机译：改善光催化性能的策略仍然是新的Sillen-Aurivillius Perovskite Bi4nbo8Cl的挑战。在此，通过原位溶剂热法制造异质结构BI / BI4NO8CL，而无需额外引入BI-源。同时，增加氧空位（OV）的量，作为在溶剂热过程中释放的[Bi2O2]嵌段作为Bi颗粒的前体。由于BI的功函数大，在BI / BI4NBO8CL界面中形成的肖特基屏障，促进在BI4NO8CON半导体中产生的光诱导电荷分离，供应更多的有机化合物分解的孔，这可以广泛应用于水净化。此外，OVS通过辅助氧气激活来促进光诱导电子的消耗，以产生超氧化物自由基（中央点O-2（）），在Bi4No8Cl的价带中留下更多孔，从而导致罗丹明B的增强（RHB）通过BI / BI4NBO8CL光催化剂的1.82倍降解1.82倍。通过BI和OV的协同作用，BI / BI4NO8CL8CL也表现出对各种有机水污染物的增强的光催化性能，例如甲基橙，酸橙7，对硝基苯酚和四环素盐酸盐。

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  • 来源
    《Journal of Hazardous Materials》 |2020年第jul5期|122408.1-122408.9|共9页
  • 作者

    Wu Xilu; Zhang Yelong; Wang Kun; Zhang Shuai; Qu Xiaofei; Shi Liang; Du Fanglin;

  • 作者单位

    Qingdao Univ Sci & Technol Coll Mat Sci & Engn Zhengzhou Rd 53 Qingdao 266042 Shandong Peoples R China;

    Wuyi Univ Sch Appl Phys & Mat 22 Dongcheng Village Jiangmen 529020 Guangdong Peoples R China;

    Qingdao Univ Sci & Technol Coll Mat Sci & Engn Zhengzhou Rd 53 Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci & Technol Coll Mat Sci & Engn Zhengzhou Rd 53 Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci & Technol Coll Mat Sci & Engn Zhengzhou Rd 53 Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci & Technol Coll Mat Sci & Engn Zhengzhou Rd 53 Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci & Technol Coll Mat Sci & Engn Zhengzhou Rd 53 Qingdao 266042 Shandong 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);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    In-situ synthesis; Heterostructures; Bi/Bi4NbO8Cl; Photocatalysis;

    机译：原位合成;异质结构;BI / BI4NBO8CL;光催化;

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