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Citation: ZHOU Shuolin, XU Qiong, XIAO Jiafu, ZHONG Wenzhou, YU Ningya, YIN Dulin. Investigation of UV-Shielding Properties of Rutile Titanium Dioxide Pigments via Photodegradation of Dimethyl Toluene-2, 4-dicarbamate[J]. Chinese Journal of Applied Chemistry, ;2015, 32(6): 683-688. doi: 10.11944/j.issn.1000-0518.2015.06.140349 shu

Investigation of UV-Shielding Properties of Rutile Titanium Dioxide Pigments via Photodegradation of Dimethyl Toluene-2, 4-dicarbamate

1.
National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hu'nan Normal University, Changsha 410081, China

Corresponding author: YIN Dulin,
Received Date: 15 October 2014
Available Online: 24 March 2015
Fund Project: 国家地方联合创新平台资助项目(No.20123098) (No.20123098)国家自然科学基金(Nos.21003043,20976043) (Nos.21003043,20976043)

Dimethyl toluene-2,4-dicarbamate(2,4-TDC) was selected as a model molecule to investigate the UV-shielding properties of TiO₂ pigments. The results show that the degradation of 2,4-TDC follows the firstorder kinetics at different volume ratios of tetrahydrofuran to n-hexane. The decrease of the degradation kinetics constant of 2,4-TDC shows an exponential power tendency with the increase of the amount of TiO₂.Moreover,it is found that the reactive species such as ·OH and holes still play a minor role on the photodegradation of 2,4-TDC in presence of TiO₂ pigments. Based on the degradation kinetics constant of 2,4-TDC,the UV-shielding properties of different TiO₂ pigments can be directly evaluated within four hours. This study might have potential applications in industrial production and practical use for evaluating the UVshielding properties of TiO₂ particles as it has advantages like mild reaction conditions,simple operation and excellent reproducibility.
- rutile titanium dioxide,
- pigment,
- dimethyl toluene-dicarbamate,
- UV-shielding,
- kinetics
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