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首页> 外文期刊>Environmental Science & Technology >Ni-Induced C-AI_2O_3-Framework (_(Ni)CAF) Supported Core-Multishell Catalysts for Efficient Catalytic Ozonation: A Structure-to-Performance Study
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Ni-Induced C-AI_2O_3-Framework (_(Ni)CAF) Supported Core-Multishell Catalysts for Efficient Catalytic Ozonation: A Structure-to-Performance Study

机译：Ni诱导的C-AI_2O_3-Framework（_（Ni）CAF）支撑的核-多壳催化剂用于高效催化臭氧化：结构-性能研究

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During catalytic ozonation, Al2O3-supported catalysts usually have stable structures but relatively low surface activity, while carbon-supported catalysts are opposite. To encourage their synergisms, we designed a Ni-induced C-Al2O3-framework ((Ni)CAF) and reinforced it with a Cu-Co bimetal to create an efficient catalyst (CuCo/(Ni)CAF) with a core-multishell structure. The partial graphitization of carbon adjacent to Ni crystals formed a strong out-shell on the catalyst surface. The rate constant for total organic carbon removal of CuCo/(Ni)CAF (0.172 +/- 0.018 min(-1)) was 67% and 310% higher than that of Al2O3-supported catalysts and Al2O3 alone, respectively. The metals on CuCo/(Ni)CAF contributed to surface-mediated reactions during catalytic ozonation, while the embedded carbon enhanced reactions within the solid-liquid boundary layer and in the bulk solution. Moreover, carbon embedment provided a 76% increase in center dot OH-production efficiency and an 86% increase in organic-adsorption capacity compared to Al2O3-supported catalysts. During the long-term treatment of coal-gasification wastewater (similar to 5 m(3) day(-1)), the pilot-scale demonstration of CuCo/(Ni)CAF-catalyzed ozonation revealed a 120% increase in ozone-utilization efficiency (Delta COD/Delta O-3 = 2.12) compared to that of pure ozonation (0.96). These findings highlight catalysts supported on (Ni)CAF as a facile and efficient approach to achieve both high catalytic activity and excellent structural stability, demonstrating that they are highly viable for practical applications.
机译：在催化臭氧氧化过程中，Al2O3负载的催化剂通常具有稳定的结构，但表面活性相对较低，而碳负载的催化剂则相反。为了鼓励它们的协同作用，我们设计了一个镍诱导的C-Al2O3-骨架（（Ni）CAF），并用Cu-Co双金属对其进行了增强，以创建具有核-多壳结构的高效催化剂（CuCo /（Ni）CAF）。 。与镍晶体相邻的碳的部分石墨化在催化剂表面形成了坚固的外壳。 CuCo /（Ni）CAF的总有机碳去除速率常数（0.172 +/- 0.018 min（-1））分别比负载Al2O3的催化剂和单独的Al2O3高67％和310％。 CuCo /（Ni）CAF上的金属有助于催化臭氧化过程中的表面介导反应，而内嵌的碳增强了固液边界层和本体溶液中的反应。此外，与Al2O3负载的催化剂相比，碳包埋使中心点OH的生产效率提高了76％，有机吸附能力提高了86％。在煤气化废水的长期处理过程中（类似于5 m（3）day（-1）），CuCo /（Ni）CAF催化臭氧化的中试示范表明，臭氧利用量增加了120％与纯臭氧化（0.96）的效率相比（Delta COD / Delta O-3 = 2.12）。这些发现突显了在（Ni）CAF上负载的催化剂是一种既简便又有效的方法，可同时实现高催化活性和出色的结构稳定性，表明它们在实际应用中非常可行。

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  • 来源
    《Environmental Science & Technology》 |2019年第12期|6917-6926|共10页
  • 作者

    Wei Kajia; Cao Xiaoxin; Gu Wancong; Liang Peng; Huang Xia; Zhang Xiaoyuan;

  • 作者单位

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, 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);
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