Hierarchical flower-like Bi2WO6 hollow microspheres: facile synthesis and excellent catalytic performance

被引：15

作者：

Zhang, Peigen ^{[1
,2
]}

Zhang, Jian ^{[1
]}

Xie, Anjian ^{[1
,2
]}

Li, Shikuo ^{[1
,2
]}

Song, Jiming ^{[1
]}

Shen, Yuhua ^{[1
,2
]}

机构：

[1] Anhui Univ, Sch Chem & Chem Engn, Hefei 230601, Peoples R China

[2] Anhui Univ, Lab Clean Energy & Green Catalysis, Hefei 230601, Peoples R China

来源：

RSC ADVANCES | 2015年 / 5卷 / 29期

关键词：

LIGHT PHOTOCATALYTIC ACTIVITY; HYDROTHERMAL SYNTHESIS; SOLVOTHERMAL SYNTHESIS; NANOSIZED BI2WO6; MICROSTRUCTURES; DEGRADATION; COMPOSITE; WATER;

D O I：

10.1039/c4ra14782k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A one step method has been developed for the fabrication of hierarchical flower-like bismuth tungstate (Bi2WO6) hollow spheres via a solvothermal process. The size of these microspheres is about 1.5 mu m, and the shells are composed of nanosheets with a thickness of about 15 nm. The product has a specific surface area of 95 m(2) g(-1). The formation mechanism of flower-like Bi2WO6 is proposed, which involves the nucleation and formation of nanoparticles followed by their self-assembly to microspheres, oriented growth, Ostwald ripening and transformation into flower-like hollow microspheres. The Bi2WO6 hollow spheres exhibit excellent visible light catalytic efficiency for the degradation of rhodamine B (RhB), up to 98% within 50 min. The efficiency remains at 92% after five photodegradation cycles due to the hierarchical hollow structure and large surface area.

引用

页码：23080 / 23085

页数：6

共 23 条

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