Photodegradation of Herbaceous Lignin and Unsaturated Polyester with a Novel TiO2 Photocatalyst System
Photodegradation of Herbaceous Lignin and Unsaturated Polyester with a Novel TiO2 Photocatalyst System
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DOI：
10.1007/s10924-014-0657-8
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发表时间：
2014-06
影响因子：
5.3
通讯作者：
Kensuke Miyazaki;Hiroaki Sato;Taiki Watanabe;Hisayuki Nakatani
中科院分区：
文献类型：
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作者：
Kensuke Miyazaki;Hiroaki Sato;Taiki Watanabe;Hisayuki Nakatani
采用新型TiO 2/聚氧化乙烯（PEO）+亚油酸甲酯（ML）光催化体系对草本木质素和不饱和聚酯进行了光降解研究。木质素和不饱和聚酯的光降解率分别为51%和40%，表明TiO 2/PEO + ML具有较高的光催化活性。TiO 2光催化剂产生的ML·由于其疏水的分子结构，能够攻击木质素和不饱和聚酯，并作为引发剂发挥良好的作用。为了研究TiO 2/PEO + ML光降解不饱和聚酯的详细机理，采用1H-NMR对光降解不饱和聚酯的氯仿可溶部分进行了表征。结果表明，TiO 2/PEO + ML催化剂优先裂解碳-碳键。
Photodegradation of a herbaceous lignin and unsaturated polyester was carried out with a novel TiO2/polyethylene oxide (PEO) + methyl linoleate (ML) photocatalyst system. The lignin and unsaturated polyester photodegradation ratios were 51 and 40 %, respectively, showing that the TiO2/PEO + ML had high photocatalyst activity. The ML· produced by the TiO2photocatalyst was able to attack the lignin and unsaturated polyester because of its hydrophobic molecular structure and worked well as the initiator. In order to study the detailed mechanism of photodegradation with the TiO2/PEO + ML, the chloroform soluble fraction of the photodegraded unsaturated polyester was characterized with1H-NMR measurement. The result showed that the TiO2/PEO + ML preferentially cleaved carbon–carbon bond.