Preparation and application of multisensitive poly(NIPAM-co-AAc-co-CoMPc)/TiO2 composites for dinitro butyl phenol wastewater treatment under visible light irradiation
Preparation and application of multisensitive poly(NIPAM-co-AAc-co-CoMPc)/TiO2 composites for dinitro butyl phenol wastewater treatment under visible light irradiation
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DOI：
10.1002/jctb.4275
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发表时间：
2014-12
影响因子：
3.4
通讯作者：
Wen-Feng Jiang;Jingyang Jiang;Wenzhu Zhang;Huilong Wang
中科院分区：
文献类型：
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作者：
Wen-Feng Jiang;Jingyang Jiang;Wenzhu Zhang;Huilong Wang
本论文针对光催化降解二硝基丁基苯酚（DNBP）废水中存在的太阳光利用效率低、纳米TiO 2颗粒难以分离回收等问题，制备了新型的聚（N-异丙基丙烯酰胺-co-丙烯酸-co-四（N-羰基丙烯酸）氨基酞酸钴）/TiO 2（poly（NIPAM-co-AAc-co-CoMPc）/TiO 2）多敏感复合材料。结果纳米TiO 2粒子成功地包裹在球形多敏感性高分子载体中，复合光催化剂可被紫外光和可见光激活。合成的复合材料表现出高的敏感性，外部温度和pH值的刺激。在pH 5.62、催化剂浓度为6 g L-1、可见光照射5 h的条件下，DNBP的去除效果较好。本研究制备的多敏感复合材料具有重复性。结论合成的多敏感复合材料可用于可见光照射下通过控制温度或pH值进行“开-关”光催化降解水中有机污染物。
BACKGROUND In this work, novel multisensitive composites of poly(N-isopropylacrylamide-co-acrylic acid-co-cobalt tetra(N-carbonylacrylic) aminophthalocyanine))/TiO2 (poly(NIPAM-co-AAc-co-CoMPc)/TiO2) were prepared to address the problems of low efficiency for utilizing solar light and difficult separation and recovery of nanometer sized TiO2 particles in the photocatalytic degradation of dinitro butyl phenol (DNBP) in wastewater. RESULTS The results showed that nanometer sized TiO2 particles were successfully encapsulated in multisensitive polymer carriers of spherical shape and that the composite photocatalyst can be activated by both ultraviolet and visible light. The synthesized composites exhibited high sensitivity to external temperature and pH stimuli. The satisfactory removal of DNBP from aqueous solution can be achieved at pH 5.62 with catalyst concentration of 6 g L−1 under visible light irradiation for 5 h. The multisensitive composites prepared in this study have repeatability. CONCLUSION The synthesized multisensitive composites can be used to perform ‘on-off’ photocatalytic degradation of organic contaminants in water under visible light irradiation by controlling temperature or pH. © 2013 Society of Chemical Industry