Citation: CUI Bai, LIN Hong, ZHAO Xiao-Chong, LI Jian-Bao, LI Wen-Di. Visible Light Induced Photocatalytic Activity of ZnCo₂O₄ Nanoparticles[J]. Acta Physico-Chimica Sinica, ;2011, 27(10): 2411-2415. doi: 10.3866/PKU.WHXB20110937 shu

Visible Light Induced Photocatalytic Activity of ZnCo₂O₄ Nanoparticles

1.
1. Department of Materials, Imperial College London, South Kensington Campus, London SW7 2AZ, UK;
2. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China;
3. Department of Material Physics and Chemistry, School of Materials Science and Engineering, University of Science & Technology Beijing, Beijing 100083, P. R. China

Received Date: 25 April 2011
Available Online: 8 August 2011
Fund Project: 国家自然科学基金(50572051, 50672041) (50572051, 50672041) 国家高技术研究发展计划项目(863) (2006AA03Z218) (863) (2006AA03Z218)国家重点基础研究发展规划项目(973)(2007CB607504)资助 (973)(2007CB607504)

ZnCo₂O₄ nanoparticles were synthesized by a co-precipitation decomposition method and their optical and photocatalytic properties were investigated. Their crystal structure and microstructures were characterized using X-ray diffraction (XRD), thermogravimetry (TG)/differential scanning calorimetry (DSC), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). The ZnCo₂O₄ nanocrystallites obtained were single-phase with an average size of 10-20 nm. The optical bandgap energies of the nanoparticles were estimated to be 3.39 and 2.09 eV from the UV-Vis absorption spectrum. The ZnCo₂O₄ nanoparticles exhibited high photocatalytic activity for the degradation of methylene blue dye solution under visible light irradiation (λ>420 nm). The photocatalytic activity of the ZnCo₂O₄ nanoparticles is attributed to their ability to absorb bandgap photons under UV and visible light as well as their nanoscale particle size. Based on these experimental results, a possible band structure of ZnCo₂O₄ is proposed.
- Photocatalysis,
- Nanostructure,
- Spinel oxide,
- Band structure,
- ZnCo₂O₄
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沈阳化工大学材料科学与工程学院沈阳 110142

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Visible Light Induced Photocatalytic Activity of ZnCo₂O₄ Nanoparticles