Citation: JI Ping-Li, WANG Jin-Gang, ZHU Xiao-Li, KONG Xiang-Zheng. Preparation of Silver Doped TiO₂ Hollow Nanoparticles and Characterization of Their Structures and Photocatalytic Properties[J]. Acta Physico-Chimica Sinica doi: 10.3866/PKU.WHXB201206262 shu

Preparation of Silver Doped TiO₂ Hollow Nanoparticles and Characterization of Their Structures and Photocatalytic Properties

1.
School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China

Received Date: 5 April 2012
Available Online: 26 June 2012
Fund Project: 国家自然科学基金(20874040, 20904016) (20874040, 20904016)山东省高校科研发展计划(J10LB09)资助项目 (J10LB09)

Anionic polystyrene (PSt) latex particles were synthesized by emulsion polymerization of methacrylic acid and styrene (St). The anionic PSt particles were surface treated with vinyl trimethoxysilane in a mixture of ethanol and water. PSt/TiO₂ composite particles doped with Ag₂O were then prepared through hydrolysis of tetrabutyl titanate and AgNO₃ using the surface treated PSt particles as templates. Hollow Ag-TiO₂ particles were successfully prepared by treating the PSt/TiO₂ composite microspheres at 180 °C, after which they were dried and calcined at 500 °C. The morphology of the PSt/TiO₂ particles and crystal structure of the Ag-TiO₂ hollow particles were characterized with scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). Photocatalytic activity of the Ag-TiO₂ hollow particles for Rhodamine B (RhB) degradation was tested under ultraviolet (UV, 365 nm) and UV-visible (370-760 nm) light. Under UV light, RhB degradation was increased by about 11% when Ag-TiO₂ particles with molar ratio n_Ag/n_Ti of 0.1% were used compared with pure TiO₂ hollow particles. Under UV-visible light, RhB degradation was increased by about 30% for Ag-TiO₂ composite particles with n_Ag/n_Ti of 1.0% and 2.0%.
- Polystyrene nanoparticle template,
- Surface modification,
- Ag-TiO₂ hollow particle,
- Photocatalytic property,
- Rhodamine B photodegradation
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沈阳化工大学材料科学与工程学院沈阳 110142

Preparation of Silver Doped TiO2 Hollow Nanoparticles and Characterization of Their Structures and Photocatalytic Properties

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通讯作者: 陈斌, bchen63@163.com

Preparation of Silver Doped TiO₂ Hollow Nanoparticles and Characterization of Their Structures and Photocatalytic Properties