Non-centrosymmetric Hollow BiOCl Nanocaps with Tailored Openings for the Photocatalytic Degradation of Rhodamine B
Non-centrosymmetric Hollow BiOCl Nanocaps with Tailored Openings for the Photocatalytic Degradation of Rhodamine B
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DOI：
10.1021/acsanm.1c04011
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发表时间：
2022-02
影响因子：
5.9
通讯作者：
Yanqun Zhang;Kefeng Zhao;Jingtao Huang;Hsien‐Yi Hsu;Jingwei Xu;R. Luque;Wenxin Niu;G. Xu
中科院分区：
文献类型：
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作者：
Yanqun Zhang;Kefeng Zhao;Jingtao Huang;Hsien‐Yi Hsu;Jingwei Xu;R. Luque;Wenxin Niu;G. Xu
表面活性剂胶束已被用作合成中空纳米结构的有力工具。尽管如此，使用胶束来引导具有开放内部的中空纳米结构的生长仍然是具有挑战性的，特别是对于结晶材料。在这里，我们报告了一个通用的方法，精确地合成非中心对称的空心BiOCl纳米帽与开放的内部第一次。阐明了空心BiOCl纳米帽的生长机理，并通过微调其生长条件可以精确控制BiOCl纳米帽的开口。非中心对称BiOCl纳米帽对罗丹明B的光降解动力学常数为0.1217 min-1，是普通BiOCl纳米片的7.8倍.这表明BiOCl纳米帽对有色罗丹明B的降解表现出优异的光催化性能。此外，BiOCl纳米帽也可以扩展到工业废水中无色污染物的光降解。更重要的是，胶束定向生长策略可以推广到合成非中心对称的BiOCl 0.5Br 0.5和BiOBr空心纳米帽。这种合成策略预示着一种设计具有胶束的非中心对称中空纳米结构的范例，并可能为具有可定制结构和性能的独特中空纳米材料开辟一条途径。
Micelles of surfactants have been employed as a powerful tool for the synthesis of hollow nanostructures. Nonetheless, it is still challenging to use micelles to direct the growth of hollow nanostructures with open interiors, especially for crystalline materials. Herein, we report a versatile method to precisely synthesize non-centrosymmetric hollow BiOCl nanocaps with open interiors for the first time. The growth mechanism of the hollow BiOCl nanocaps is elucidated, and the openings of BiOCl nanocaps can be precisely controlled by fine tuning their growth conditions. The non-centrosymmetric BiOCl nanocaps yield a pseudo-first-order degradation kinetic rate constant of up to 0.1217 min–1in the photodegradation of rhodamine-B, 7.8 times higher than that of common BiOCl nanoplates. This suggests that BiOCl nanocaps show excellent photocatalytic performance to degrade colored rhodamine B. Furthermore, the BiOCl nanocaps can be also extended in the photodegradation of colorless contaminants in industrial wastewater. More importantly, the micelle-directed growth strategy can be generalized to synthesize non-centrosymmetric BiOCl0.5Br0.5and BiOBr hollow nanocaps. This synthetic strategy heralds a paradigm for designing non-centrosymmetric hollow nanostructures with micelles and may open up an avenue for unique hollow nanomaterials with tailorable structures and properties.