Ag2O–Bi2O3 composites: synthesis, characterization and high efficient photocatalytic activities
Ag2O–Bi2O3 composites: synthesis, characterization and high efficient photocatalytic activities
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DOI：
10.1039/c2ce25301a
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发表时间：
2012-08
期刊：
影响因子：
3.1
通讯作者：
Lin Zhu;B. Wei;Lingling Xu;Z. Lü;Hailin Zhang;Hong Gao;Jixin Che
中科院分区：
文献类型：
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作者：
Lin Zhu;B. Wei;Lingling Xu;Z. Lü;Hailin Zhang;Hong Gao;Jixin Che
合成了Ag2O纳米粒子修饰的α-Bi2O3复合光催化剂，并通过X射线衍射（XRD）、扫描电子显微镜（SEM）和紫外-可见漫反射光谱进行表征。 XRD图谱证实该复合材料由立方相Ag2O和单斜α-Bi2O3相组成。由于酸蚀 Bi2O3 微棒表面粗糙，Ag2O 负载量大大增加。通过甲基橙（MO）的降解来评估Ag2O-Bi2O3复合材料的光催化活性。估计了Ag2O含量和光催化活性之间的相关性。以Ag/Bi比例为3:1为原料的复合材料表现出最高的可见光活性，其增强机制归因于载流子转移导致光生电子和空穴的分离。
Ag2O nanoparticle modified α-Bi2O3 composite photocatalysts were synthesized and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-vis diffuse reflectance spectroscopy. XRD patterns confirmed that the composites consist of cubic phase Ag2O and monoclinic α-Bi2O3 phase. The Ag2O loading was greatly increased due to the rough surface of the acid etched Bi2O3 microrods. Photocatalytic activity of the Ag2O–Bi2O3 composites was evaluated using the degradation of methyl orange (MO). The correlation between the Ag2O content and photocatalytic activity was estimated. The composite with Ag to Bi ratio of 3 : 1 as raw material showed the highest visible light activity and the enhancement mechanism was attributed to the separation of photoinduced electron and holes by the carrier transfer.