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Acta Phys. Chim. Sin.  2012, Vol. 28 Issue (11): 2713-2720    DOI: 10.3866/PKU.WHXB201207163
Photocatalytic Properties of Aluminum Doped Zinc Oxide Nanocrystals Controlled Prepared via a Synergistic Ultrasonic/Hydrothermal Technique
YANG Xiao-Hong2, TONG Qin1, LIU Chang1, LIU Jin-Ku1, HE Wen-Zhi3, LI Guang-Ming3
1. Department of Chemistry, East China University of Science and Technology, Shanghai 200237, P.R. China;
2. 2Department of Chemistry, Chizhou University, Chizhou 247000, Anhui Province, P.R. China;
3. School of Environmental Science and Engineering, Tongji University, Shanghai 200092, P.R. China
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Aluminum doped zinc oxide (ZAO) nanocrystals approximately 20 nm in diameter and with good dispersity and crystallinity were efficiently synthesized through a synergistic combination of ultrasonic and hydrothermal methods. The morphologies, structures, and optical properties of these nanocrystals, as well as the thermochemistry of the precursor, were determined using transmission electron microscopy (TEM), powder X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy, and thermogravimetric-differential thermal analysis (TG-DTA). ZAO nanocrystals were investigated with regard to the photocatalysis of rhodamine B (RhB) in solution, including studies of degradation rates and catalysis mechanism. It was found that both the particle size and crystallinity of the material can be controlled through the ultrasonic/hydrothermal synergetic effect. The main absorption peak of the product in a typical UV-Vis spectrum appeared at ~369 nm and its energy band gap was determined to be 3.36 eV. The ZAO produced by this method exhibits enhanced photocatalytic activity; compared to catalysis by materials produced solely by ultrasonic or hydrothermal routes, the degradation time of an RhB solution is reduced by 77.8%. In addition, it was found that this ZAO photocatalyst may be recycled and used more than once.

Key wordsUltrasonic route      Hydrothermal route      Aluminum doped zinc oxide      Nanocrystal      Photocatalysis     
Received: 17 May 2012      Published: 16 July 2012
MSC2000:  O643  

The project was supported by the National Natural Science Foundation of China (21071024) and the State Key Laboratory of Pollution Control, Resource Reuse Foundation (PCRRF11019).

Cite this article:

YANG Xiao-Hong, TONG Qin, LIU Chang, LIU Jin-Ku, HE Wen-Zhi, LI Guang-Ming. Photocatalytic Properties of Aluminum Doped Zinc Oxide Nanocrystals Controlled Prepared via a Synergistic Ultrasonic/Hydrothermal Technique. Acta Phys. Chim. Sin., 2012, 28(11): 2713-2720.

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