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首页> 外文期刊>Catalysis science & technology >Synthesis and characterization of single-crystalline Bi2O2SiO3 nanosheets with exposed {001} facets
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Synthesis and characterization of single-crystalline Bi2O2SiO3 nanosheets with exposed {001} facets

机译：合成和表征单个水晶Bi2O2SiO3 nanosheets与暴露的{001}面

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摘要

Bismuth oxide silicate (Bi2O2SiO3) single-crystalline nanosheets with exposed {001} facets were synthesized for the first time via a facile one-step CTAB-assisted hydrothermal method in the presence of NaOH. Control experiments were carried out to investigate various factors that affect the formation, morphology and exposed planes of the products systematically. The results revealed that the pH and the amount of CTAB play vital roles in the reaction. Bi2O2SiO3 nanosheets could not be obtained without the addition of sodium hydroxide solution in the synthesis process, and CTAB not only promotes the exposure of {001} facets, but also modulates the size and thickness of these Bi2O2SiO3 nanosheets in a wide range. It was shown that the as-prepared Bi2O2SiO3 nanosheets synthesized under the conditions that the amount of CTAB was 4 mmol and the pH value was 12 exhibited higher photocatalytic activities toward RhB and BPA degradation under simulated sunlight irradiation than all the other samples in our experiment, which might give the main credit to the highly exposed {001} facets and considerable number of oxygen vacancies. The present work provides a new reference for the synthesis of Bi2O2SiO3 nanosheets and other manipulation of facetdependent photoreactivity of semiconductors.
机译：三氧化二铋硅酸盐(Bi2O2SiO3)单个水晶nanosheets暴露与{001}方面是通过首次合成的简单一步CTAB-assisted热液的方法在氢氧化钠的存在。各种因素进行调查影响形成,形态和暴露飞机产品的系统。结果表明,pH值的数量CTAB在其中扮演重要角色的反应。nanosheets不能没有获得加入氢氧化钠溶液合成过程,CTAB不仅促进了{001}面接触,还可以调节尺寸和厚度这些Bi2O2SiO3 nanosheets在一个范围广泛。好Bi2O2SiO3 nanosheets合成条件下,CTAB的数量4更易与pH值高出12展出光催化活动向RhB和双酚a模拟阳光照射下退化比其他所有的样品在我们的实验中,这可能给的主要信贷高度吗暴露的{001}面和相当数量的氧空位。参考Bi2O2SiO3的合成nanosheets和其他操作facetdependent photoreactivity半导体。

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