Selective hydrothermal synthesis of BiOBr microflowers and Bi2O3 shuttles with concave surfaces
Selective hydrothermal synthesis of BiOBr microflowers and Bi2O3 shuttles with concave surfaces
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DOI：
10.1016/j.jssc.2011.04.015
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发表时间：
2011-06
影响因子：
3.3
通讯作者：
Peipei Xiao;Lingling Zhu;Yongchun Zhu;Yitai Qian
中科院分区：
文献类型：
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作者：
Peipei Xiao;Lingling Zhu;Yongchun Zhu;Yitai Qian
通过控制NaOH的加入量，在Bi (NO3) 3-十六烷基三甲基溴化铵(CTAB)-NaOH反应体系中水热合成了不同形状的BiOBr和Bi2O3。在加入8mmol NaOH的条件下，合成了由纳米薄片构成的BiOBr微花。这些单晶纳米片的厚度约为20 nm。在相同的条件下，NaOH加入量为28 mmol时，可以得到表面凹的Bi2O3梭形物。梭体长度为100 μm，梭体中间直径为50 μm。通过在可见光（λ> 420 nm）照射下对甲基橙（MO）的降解，评价了制备的BiOBr微花在90 min内的光催化活性，降解率高达96%。-图摘要：通过控制NaOH的添加量，在Bi (NO3) 3-十六烷基三甲基溴化铵(CTAB)-NaOH反应体系中水热合成BiOBr微花和凹表面Bi2O3梭状物。重点：→用水热法合成了纳米薄片构建的BiOBr微花。→还合成了具有凹表面的Bi2O3梭子。→根据实验结果研究了它们的形成机理。→在可见光照射下评价BiOBr微花的光催化活性。
Through controlling the amount of NaOH added, BiOBr and Bi2O3 with different shapes were hydrothermally synthesized in the reaction system of Bi (NO3) 3-hexadecyl trimethyl ammonium bromide (CTAB)-NaOH. As 8 mmol of NaOH was added, BiOBr microflowers constructed of nanoflakes were synthesized. The thickness of these single-crystal nanoflakes was about 20 nm. In the similar condition, when the amount of NaOH added was 28 mmol, Bi2O3 shuttles with concave surfaces were obtained. The length of these shuttles was 100 μm and the diameter at the middle of these shuttles was 50 μm. The photocatalytic activity of as-prepared BiOBr microflowers was evaluated by the degradation of methyl orange (MO) under visible-light irradiation (λ> 420 nm), which was up to 96% within 90 min.-Graphical abstract: Through controlling the amount of NaOH added, BiOBr microflowers and Bi2O3 shuttles with concave surfaces were hydrothermally synthesized in the reaction system of Bi (NO3) 3-hexadecyl trimethyl ammonium bromide (CTAB)-NaOH. Highlights:→ BiOBr microflowers constructed of nanoflakes were synthesized hydrothermally.→ Bi2O3 shuttles with concave surfaces were also synthesized.→ Their formation mechanisms were studied based on the experimental results.→ The photocatalytic activity of BiOBr microflowers was evaluated under visible-light irradiation.