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Optimized Self‐Templating Synthesis Method for Highly Crystalline Hollow Cu2O Nanoboxes
Small Methods ( IF 10.7 ) Pub Date : 2020-09-13 , DOI: 10.1002/smtd.202000521
Ruoyun Dai 1 , Weng‐Chon Cheong 1 , Jiqing Jiao 2 , Chao Zhang 2 , Yu Zhang 3 , Zheng Chen 4 , Caiyun Nan 3 , Chen Chen 1
Affiliation  

Hollow nanomaterials consisting of non‐noble metal oxides have wide applications in catalysis, and many preparation methods for this kind of structures are established. However, it is still challenging to fabricate non‐noble‐metal hollow structures featuring high crystallinity, regular polyhedral morphologies, and small sizes, owing to their relatively low chemical stability and the stringent hollowing conditions. Here in this work, an optimized self‐templating synthesis method with refined control over the heating program and solution environment, which can alleviate the common issues of morphology and crystallinity degradation from precursors during hollowing process, is reported. Through this method, highly crystalline Cu2O nanobox with sizes below 50 nm is successfully prepared. Benefiting from the unique hollow structures, the Cu2O nanobox/C catalyst gives outstanding performances in catalyzing the oxidative homocoupling of phenylacetylene, with the advantages of lower metal loading, mild reaction conditions, and no additives. This optimized method can be extended to the preparation of other non‐noble‐metal hollow materials with sophisticated architectures.

中文翻译:

高结晶空心Cu2O纳米盒的优化自模板合成方法

由非贵金属氧化物组成的中空纳米材料在催化中具有广泛的应用,并为此建立了许多制备方法。然而,由于其相对较低的化学稳定性和严格的空心条件,制造具有高结晶度,规则的多面体形貌和小尺寸的非贵金属空心结构仍然是一项挑战。在这项工作中,报告了一种优化的自模板合成方法,该方法可对加热程序和溶液环境进行精确控制,可减轻空心加工过程中前体的形貌和结晶度降低的常见问题。通过这种方法,高度结晶的Cu 2成功制备了尺寸小于50 nm的O纳米盒。得益于独特的中空结构,Cu 2 O纳米盒/ C催化剂在催化苯基乙炔的氧化均偶联反应方面具有出色的性能,具有较低的金属负载量,适度的反应条件和无添加剂的优点。这种优化的方法可以扩展到其他具有复杂结构的非贵金属空心材料的制备。
更新日期:2020-09-13
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