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

doi:10.11944/j.issn.1000-0518.2015.06.140349

Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (6): 683-688.DOI: 10.11944/j.issn.1000-0518.2015.06.140349

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

ZHOU Shuolin, XU Qiong, XIAO Jiafu, ZHONG Wenzhou, YU Ningya, YIN Dulin^*

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

Received:2014-10-15 Accepted:2015-03-24 Published:2015-06-10 Online:2015-06-10
Contact: Dulin YIN
Supported by:
Supported by the National & Local Joint Innovation Platform(No.20123098), the National Natural Science Foundation of China(No.21003043, No.20976043)

Abstract

Abstract:

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 first-order 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 UV-shielding properties of TiO₂ particles as it has advantages like mild reaction conditions, simple operation and excellent reproducibility.

Key words: rutile titanium dioxide, pigment, dimethyl toluene-dicarbamate, UV-shielding, kinetics

CLC Number:

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.

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

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