光催化
材料科学
罗丹明B
化学工程
扫描电子显微镜
溶剂热合成
纳米结构
纳米技术
比表面积
铋
奥斯特瓦尔德成熟
透射电子显微镜
降级(电信)
催化作用
化学
有机化学
复合材料
工程类
冶金
电信
计算机科学
作者
Jinyan Xiong,Gang Cheng,Zhong Lu,Jiale Tang,Xianglin Yu,Rong Chen
出处
期刊:CrystEngComm
[The Royal Society of Chemistry]
日期:2011-01-01
卷期号:13 (7): 2381-2381
被引量:95
摘要
Different shaped bismuth oxide formate (BiOCOOH), including spherical-like, sponge-like, tremella-like, flower-like hierarchical nanostructures have been successfully synthesized through a facile and template-free solvothermal process in different solvents. The products were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflection spectroscopy (DRS) and nitrogen adsorption. Based on the electron microscopy observations of the products obtained under different experimental conditions, a possible growth mechanism which involves Ostwald ripening and self-assembly process was proposed. It was found the solvent plays a crucial role in the formation of the BiOCOOH hierarchical nanostructures. The optical properties, Brunauer–Emmett–Teller (BET) surface areas and photocatalytic activities on the degradation of Rhodamine B (RhB) of the different BiOCOOH hierarchitectures were also evaluated. The results indicated that the synthesized sponge-like BiOCOOH hierarchical nanostructures possessed favorable recycling characteristics, and exhibited the highest photocatalytic activity compared with other BiOCOOH hierarchitectures, because of its largest surface area (30.28 m2 g−1) and large band gap (3.46 eV). This work not only provides new strategies for the controllable synthesis of other novel hierarchical materials, but also develops new promising photocatalysts for degrading organic pollutants and explores significant potential applications in environment pollution.
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