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Crystal-plane effect of Cu2O templates on compositions, structures and catalytic performance of Ag/Cu2O nanocomposites
CrystEngComm ( IF 2.6 ) Pub Date : 2019-02-25 00:00:00 , DOI: 10.1039/c8ce02164c Zhenhua Zhang 1, 2, 3, 4, 5 , Rui Song 1, 2, 3, 4, 5 , Zongyou Yu 1, 2, 3, 4, 5 , Weixin Huang 1, 2, 3, 4, 5
CrystEngComm ( IF 2.6 ) Pub Date : 2019-02-25 00:00:00 , DOI: 10.1039/c8ce02164c Zhenhua Zhang 1, 2, 3, 4, 5 , Rui Song 1, 2, 3, 4, 5 , Zongyou Yu 1, 2, 3, 4, 5 , Weixin Huang 1, 2, 3, 4, 5
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Various Ag/Cu2O nanocomposites were prepared via the galvanic replacement reaction involving AgNO3 reacting respectively with uniform Cu2O cubes and octahedra. Their compositions and structures were comprehensively characterized microscopically and spectroscopically. The results reveal that the crystal plane of employed Cu2O solid templates determines the compositions and structures of the resulting Ag/Cu2O nanocomposites. A smooth surface mixed with nanoneedles or nanosheets of Ag/c-Cu2O structures was fabricated on Cu2O cubes while flocculent Ag/o-Cu2O structures were fabricated on Cu2O octahedra. The catalytic performance of Ag/Cu2O nanocomposites were evaluated in CO oxidation with excess O2. In situ surface restructuring occurs on various Ag/Cu2O nanocomposites to form Ag–CuO/Cu2O nanocomposites. The catalytic activity of the resulting Ag–CuO/Cu2O nanocomposites depends on the structures of CuO and Ag that are affected by the original crystal plane of Cu2O solid templates and the Ag loading. These results broaden the crystal-plane effect of Cu2O nanocrystals as solid templates for synthesis of multicomponent nanocomposites via liquid–solid interfacial reactions.
中文翻译：
Cu 2 O模板的晶面效应对Ag / Cu 2 O纳米复合材料的 组成，结构和催化性能的影响
通过电流置换反应制备了各种Ag / Cu 2 O纳米复合材料，涉及AgNO 3分别与均匀的Cu 2 O立方体和八面体反应。通过显微镜和光谱对它们的组成和结构进行了全面表征。结果表明，所使用的Cu 2 O固体模板的晶面决定了所得Ag / Cu 2 O纳米复合材料的组成和结构。光滑表面有Ag /纳米针的纳米片或混合的C-Cu系2 O结构，制作在Cu 2个ö立方体而絮状的Ag /邻的Cu 2层O结构分别在Cu制成2八面体。在过量O 2的CO氧化反应中评价了Ag / Cu 2 O纳米复合材料的催化性能。原位表面重构发生在各种Ag / Cu 2 O纳米复合材料上，形成了Ag–CuO / Cu 2 O纳米复合材料。生成的Ag–CuO / Cu 2 O纳米复合材料的催化活性取决于CuO和Ag的结构，这些结构受Cu 2 O固体模板的原始晶面和Ag含量的影响。这些结果拓宽了Cu 2 O纳米晶体的晶体平面效应，作为通过液-固界面反应合成多组分纳米复合材料的固体模板。
更新日期：2019-02-25
中文翻译：
Cu 2 O模板的晶面效应对Ag / Cu 2 O纳米复合材料的 组成，结构和催化性能的影响
通过电流置换反应制备了各种Ag / Cu 2 O纳米复合材料，涉及AgNO 3分别与均匀的Cu 2 O立方体和八面体反应。通过显微镜和光谱对它们的组成和结构进行了全面表征。结果表明，所使用的Cu 2 O固体模板的晶面决定了所得Ag / Cu 2 O纳米复合材料的组成和结构。光滑表面有Ag /纳米针的纳米片或混合的C-Cu系2 O结构，制作在Cu 2个ö立方体而絮状的Ag /邻的Cu 2层O结构分别在Cu制成2八面体。在过量O 2的CO氧化反应中评价了Ag / Cu 2 O纳米复合材料的催化性能。原位表面重构发生在各种Ag / Cu 2 O纳米复合材料上，形成了Ag–CuO / Cu 2 O纳米复合材料。生成的Ag–CuO / Cu 2 O纳米复合材料的催化活性取决于CuO和Ag的结构，这些结构受Cu 2 O固体模板的原始晶面和Ag含量的影响。这些结果拓宽了Cu 2 O纳米晶体的晶体平面效应，作为通过液-固界面反应合成多组分纳米复合材料的固体模板。
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