Facile Synthesis of Monodisperse Porous ZnO Spheres by a Soluble Starch-Assisted Method and Their Photocatalytic Activity

被引：226

作者：

Zhang, Gaoke ^{[1
,2
]}

Shen, Xiong ^{[2
]}

Yang, Yanqing ^{[1
]}

机构：

[1] Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Peoples R China

[2] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 15期

基金：

中国国家自然科学基金;

关键词：

RESONANT RAMAN-SCATTERING; ZINC-OXIDE; MICROSPHERES; MICROSTRUCTURES; NANOSTRUCTURES; NANOPARTICLES; LUMINESCENCE; COMPLEXES; POROSITY; DEFECTS;

D O I：

10.1021/jp110256s

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study monodisperse porous ZnO spheres were fabricated by a facile and low-cost soluble-starch-assisted method. The as-obtained samples were characterized by X-ray diffraction (XRD), Raman spectroscopy scanning electron microscopy (SEM), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy (DRS), thermogravimetric and differential scanning calorimetry (TG-DSC), Fourier transform infrared (FTIR) spectroscopy and Brunauer-Emmett-Teller (BET) analysis. The Raman spectra revealed that the uncalcined powders were composed of ZnO and starch. The BET analysis showed that mesopores (25 nm) and macropores (180 nm) coexisted in the typical porous ZnO spheres. The photocatalytic activities of the as-obtained ZnO samples were evaluated in the photocatalytic degradations of aqueous solutions of rhodamine B (RhB) and 4-nitrophenol (4-NP) at room temperature. A possible growth mechanism of the as-obtained porous ZnO spheres is also discussed.

引用

页码：7145 / 7152

页数：8

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