Citation: ZHANG Qiao-Ling, LI Lei, LIU You-Zhi, WEI Bing, GUO Jia-Xin, FENG Yu-Jie. Grafting Dynamics, Structures and Properties of Nano TiO₂-SA Photocatalytic Materials[J]. Acta Physico-Chimica Sinica, ;2015, 31(6): 1015-1024. doi: 10.3866/PKU.WHXB201504143 shu

Grafting Dynamics, Structures and Properties of Nano TiO₂-SA Photocatalytic Materials

1.
1 Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan 030051, P. R. China;
2 State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, P. R. China

Received Date: 26 January 2015
Available Online: 14 April 2015
Fund Project: 山西省自然科学基金(2012011008-2) (2012011008-2)哈尔滨工业大学城市水资源与水环境国家重点实验室开放基金(QA201401)资助项目 (QA201401)

Salicylic acid (SA) was successfully grafted onto nano-TiO₂ surfaces (TiO₂-SA) by post-treatment surface modification. The effects of ultrasound stiring, solvents, material ratio, pH value, and temperature on the grafting process and photocatalytic material properties were investigated, and the grafting reaction kinetics was determined. The structures of the materials were determined using Fourier transform infrared (FT- IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). A structural model was proposed. The properties of the photocatalytic material were examined using contact angle analysis, simultaneous thermogravimetry-differential scanning calorimetry (TG-DSC), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), and scanning electron microscopy (SEM). Compared with bare TiO₂, the modified TiO₂ had od hydrophobicity and dispersion properties, a lower sedimentation velocity in solvents, better adsorption stability at oil-water interfaces, and extended visible light absorption. The TiO₂-SA gave excellent photocatalytic performances in nitrobenzene degradation under ultraviolet-light irradiation.
- Titanium dioxide,
- Salicylic acid,
- Dispersion,
- Structure model,
- Pickering emulsion
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Grafting Dynamics, Structures and Properties of Nano TiO₂-SA Photocatalytic Materials