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首页> 外文期刊>Journal of Hazardous Materials >Nanostructured Co-Mn containing perovskites for degradation of pollutants: Insight into the activity and stability
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Nanostructured Co-Mn containing perovskites for degradation of pollutants: Insight into the activity and stability

机译：纳米结构含钙锰矿的钙锰矿可降解污染物：深入了解活性和稳定性

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摘要

The efficient oxidative removal of persistent organic components in wastewater relies on low-cost heterogeneous catalysts that offer high catalytic activity, stability, and recyclability. Here, we designed a series of nanostructured Co-Mn containing perovskite catalysts, LaCo1-xMnO3+delta (LCM, x = 0, 0.3, 0.5, 0.7, and 1.0), with over-stoichiometric oxygen (8 0) to show superior catalytic activity for the degradation of a variety of persistent aqueous organic pollutants by activating peroxymonosulfate (PMS). The nature of LCM for catalysis was comprehensively investigated. A "volcano-shaped" correlation was observed between the catalytic activity and electron filling (e(g)) of Co in LCM. Among these compounds, LaCo0.5Mn0.5O3+delta (LCM55) exhibited an excellent activity with e(g) = 1.27. The high interstitial oxygen ion diffusion rate (D-O(2-) = 1.58 +/- 0.01 x 10(-13) cm(2)s(-1)) of LCM55 also contributes to its catalytic activity. The enhanced stability of LCM55 can be ascribed to its stronger relative acidity (3.22). Moreover, an increased solution pH (pH = 7) generated a faster organic degradation rate and a decrease in metal leaching (0.004 mM) for LCM55 perovskite, justifying it as a potential material for environmental remediation.
机译：废水中持久性有机成分的有效氧化去除取决于低成本的多相催化剂，该催化剂具有较高的催化活性，稳定性和可回收性。在这里，我们设计了一系列纳米结构的含钴锰钙钛矿型催化剂LaCo1-xMnO3 + delta（LCM，x = 0、0.3、0.5、0.7和1.0），其中氧的化学计量过高（8> 0）通过活化过一硫酸盐（PMS）降解各种持久性有机污染物的催化活性。全面研究了LCM催化的性质。在LCM中，Co的催化活性与电子填充（e（g））之间观察到“火山状”的相关性。在这些化合物中，LaCo0.5Mn0.5O3 +δ（LCM55）表现出极好的活性，e（g）= 1.27。 LCM55的高间隙氧离子扩散速率（D-O（2-）= 1.58 +/- 0.01 x 10（-13）cm（2）s（-1））也有助于其催化活性。 LCM55增强的稳定性可以归因于其较强的相对酸度（3.22）。此外，对于LCM55钙钛矿来说，溶液pH值的增加（pH> = 7）产生更快的有机降解速率和金属浸出的减少（0.004 mM），证明它是潜在的环境修复材料。

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  • 来源
    《Journal of Hazardous Materials》 |2018年第may5期|177-185|共9页
  • 作者

    Miao Jie; Sunarso Jaka; Duan Xiaoguang; Zhou Wei; Wang Shaobin; Shao Zongping;

  • 作者单位

    Nanjing Tech Univ, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, State Key Lab Mat Oriented Chem Engn, Coll Chem Engn, 5 Xin Mofan Rd, Nanjing 210009, Jiangsu, Peoples R China;

    Swinburne Univ Technol, Fac Engn Comp & Sci, Jalan Simpang Tiga, Kuching 93350, Sarawak, Malaysia;

    Curtin Univ, Dept Chem Engn, GPO Box U1987, Perth, WA 6845, Australia;

    Nanjing Tech Univ, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, State Key Lab Mat Oriented Chem Engn, Coll Chem Engn, 5 Xin Mofan Rd, Nanjing 210009, Jiangsu, Peoples R China;

    Curtin Univ, Dept Chem Engn, GPO Box U1987, Perth, WA 6845, Australia;

    Nanjing Tech Univ, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, State Key Lab Mat Oriented Chem Engn, Coll Chem Engn, 5 Xin Mofan Rd, Nanjing 210009, Jiangsu, 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
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  • 关键词

    Perovskite; Over-stoichiometric oxygen; Organic pollutants; PMS; e(g) occupancy;

    机译：钙钛矿;化学计量过量的氧气;有机污染物;PMS;e（g）占有率;

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