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首页> 外文期刊>Polymer Degradation and Stability >Photocatalytic efficiency of TiO_2/poly[acrylamide-co-(acrylic acid)] composite for textile dye degradation
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Photocatalytic efficiency of TiO_2/poly[acrylamide-co-(acrylic acid)] composite for textile dye degradation

机译：TiO_2 /聚[丙烯酰胺-共-（丙烯酸）]复合物对织物染料降解的光催化效率

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摘要

A novel photocatalytically degradable TiO_2/poly[acrylamide-co-(acrylic acid)] composite hydrogel (TiO_2/ poly[AAm-co-AAc]) was synthesized by polymerization in an aqueous solution with N,N'-methyl-enebisacrylamide as the crosslinker and ammonium persulphate and TEMED as the initiator pair. The combined and separate effects of photodegradation and adsorption processes for dye removal were evaluated using methylene blue (MB) as the model dye for a photodegradation target, and compared with those of the neat poly[AAm-co-AAc], and a commercially available TiO_2 photocatalyst (Degussa P-25). Without photodegradation (i.e. in the dark), the TiO_2/poly[AAm-co-AAc] composite adsorbed up to 85% of the MB from a 5 mg L~(-1) MB solution in 15 min compared to only 10% for the pristine TiO_2. The reproducibility in photodegradation of the reused poly[AAm-co-AAc] composite was also investigated, where poly[AAm-co-AAc] was found to be photocatalytically degraded under UV irradiation. Therefore, the TiO_2/poly[AAm-co-AAc] composite hydrogel is a good dye adsorber with self-photodegradability and it also can easily be separated from the reaction by simple nitration. With these properties, the TiO_2/poly [AAm-co-AAc] hydrogel can be called a green polymer for use in the photodegradation-adsorption process for the abatement of various pollutants.
机译：以N，N'-甲基-烯撑双丙烯酰胺为水溶液，通过水溶液聚合制备了一种新型的光催化降解TiO_2 /聚[丙烯酰胺-共-（丙烯酸）]复合水凝胶（TiO_2 /聚[AAm-co-AAc]）。交联剂和过硫酸铵和TEMED作为引发剂对。使用亚甲基蓝（MB）作为光降解目标的模型染料，评估了光降解和吸附去除染料的组合效果和分离效果，并将其与纯聚[AAm-co-AAc]和市售的纯聚[AAm-co-AAc]比较TiO_2光催化剂（Degussa P-25）。在没有光降解的情况下（即在黑暗中），TiO_2 /聚[AAm-co-AAc]复合材料在15分钟内从5 mg L〜（-1）MB溶液中吸附了高达85％的MB，而在10min时仅为10％。原始的TiO_2。还研究了重复使用的聚[AAm-co-AAc]复合材料在光降解方面的可再现性，发现聚[AAm-co-AAc]在紫外线照射下被光催化降解。因此，TiO_2 /聚[AAm-co-AAc]复合水凝胶是一种良好的染料吸附剂，具有自光降解性，并且还可以通过简单的硝化作用轻易地从反应中分离出来。具有这些特性，TiO_2 /聚[AAm-co-AAc]水凝胶可被称为绿色聚合物，用于光降解-吸附过程中以减少各种污染物。

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  • 来源
    《Polymer Degradation and Stability》 |2010年第9期|p.1894-1902|共9页
  • 作者

    Wiyong Kangwansupamonkon; rnWalasinee Jitbunpot; rnSuda Kiatkamjornwong;

  • 作者单位

    National Nanotechnology Center, National Science and Technology Development Agency 111 Thailand Science Park, Paholyothin Road, Klong 1, Klong Luang, Pathumthani 12120, Thailand;

    rnProgram of Petrochemistry and Polymer Science, Faculty of Science, Chulalongkorn University, Phyathai Road, Bangkok 10330, Thailand;

    rnDepartment of Imaging and Printing Technology, Faculty of Science, Chulalongkorn University, Phyathai Road, Bangkok 10330, Thailand;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    TiO_2; hydrogel; photocatalytic degradation; dye removal;

    机译：TiO_2;水凝胶光催化降解;去除染料;

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