Simulated sunlight photodegradation of aqueous phthalate esters catalyzed by the polyoxotungstate/titania nanocomposite.
Simulated sunlight photodegradation of aqueous phthalate esters catalyzed by the polyoxotungstate/titania nanocomposite.
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DOI：
10.1016/j.jhazmat.2010.02.049
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发表时间：
2010-06
影响因子：
13.6
通讯作者：
Lei Xu;Xia Yang;Yihang Guo;Fengyan Ma;Yingna Guo;Xing Yuan;M. Huo
中科院分区：
文献类型：
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作者：
Lei Xu;Xia Yang;Yihang Guo;Fengyan Ma;Yingna Guo;Xing Yuan;M. Huo
一系列多孔多钨酸/二氧化钛纳米复合材料（PW12/TiO2），其粒径小于10nm，BET比表面积约为10nm。通过溶胶-凝胶化学结合溶剂热处理制备了200m2g−1。该复合材料首次成功应用于模拟太阳光照射（λ=320-680nm）下降解邻苯二甲酸二正丁酯（DBP）、邻苯二甲酸二乙酯（DEP）和邻苯二甲酸二甲酯（DMP）等水性邻苯二甲酸酯（PAE），模拟太阳光照射悬浮液后，DBP、DEP和DMP的转化率分别达到98%、84%和80%包括 PAE (5mgL−1, 100mL) 和 PW12/TiO2-19.8 (100mg)，持续 90 分钟。此外，通过进一步增加光照时间至12h，DBP和DEP几乎完全矿化。基于反应体系中鉴定的中间体，提出了PAEs的光催化降解途径。
A series of porous polyoxotungstate/titania nanocomposites (PW12/TiO2) with particle size lower than 10nm and BET surface area of ca. 200m2g−1was prepared by sol–gel chemistry combined with solvothermal treatment. The composites were successfully applied to the degradation of aqueous phthalate esters (PAEs) including di-n-butyl phthalate (DBP), diethyl phthalate (DEP), and dimethyl phthalate (DMP) under the simulated sunlight irradiation (λ=320–680nm) for the first time, and the conversion of DBP, DEP, and DMP reached to 98%, 84%, and 80%, respectively, after the simulated sunlight irradiation the suspension including PAE (5mgL−1, 100mL) and PW12/TiO2-19.8 (100mg) for 90min. In addition, nearly total mineralization of DBP and DEP was realized by further increasing light irradiation time to 12h. Based on the intermediates identified in the reaction system, the photocatalytic degradation pathway of PAEs was put forward.