Template-free synthesis of hierarchical constructed flower-like δ-Bi 2 O 3 microspheres with photocatalytic performance
Template-free synthesis of hierarchical constructed flower-like δ-Bi 2 O 3 microspheres with photocatalytic performance
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DOI：
10.1049/mnl.2012.0201
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发表时间：
2012-07
影响因子：
1.3
通讯作者：
Jinsong Xie;Liangsong Li;Changan Tian;Chengliang Han;Difang Zhao
中科院分区：
文献类型：
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作者：
Jinsong Xie;Liangsong Li;Changan Tian;Chengliang Han;Difang Zhao
以甘氨酸和硝酸铋为原料，在不添加其他添加剂的情况下，通过简单的水热法制备了从纳米颗粒到纳米片状再到微球的花状δ-Bi2O3微球。用X射线粉末衍射仪、场发射扫描电子显微镜和透射电子显微镜对样品的晶体结构和形貌进行了表征。样品的UV-Vis漫反射光谱表明，产物在紫外光区有较强的吸收，估算禁带宽度为3.55 eV。此外，在紫外光照射下，样品对罗丹明B染料的降解表现出较高的光催化活性和良好的稳定性，在废水处理领域具有广阔的应用前景。
Step-wise self-assembled flower-like δ-Bi2O3 microspheres from nanoparticles to nanosheets to microspheres were fabricated via a simple hydrothermal process, using glycine and Bi (NO3)3·5H2O as starting materials without other additives. The crystal structures and morphologies of the as-obtained samples were characterised by X-ray powder diffraction, field emission scanning electron microscope and transmission electron microscopy. The UV–vis diffuse reflectance spectrum of the sample showed the product has an intense absorption in UV light regions and an estimated bandgap 3.55 eV. Moreover, under UV-light irradiation the sample exhibited high photocatalytic behaviour for the degradation of rhodamine B dye and excellent stability, which possibly has a board application in wastewater disposal fields.