TiO_2纳米带负载FePcS光催化降解有毒有机污染物  

Photocatalytic Degradation of Toxic Organic Pollutants Catalyzed by FePcS Immobilized on TiO_2 Nanobelt

作　　者：汪淑廉[1] 饶志[1] 王攀[1] 曹婷婷[1] 赵小蓉[1] 黄应平[1] 

机构地区：[1]三峡大学三峡库区生态环境教育部工程研究中心,湖北宜昌443002

出　　处：《三峡大学学报（自然科学版）》2011年第1期88-93,共6页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金(20877048);湖北省青年杰出人才基金(5ABB030);催化材料科学湖北省暨国家民委教育部共建重点实验室开放基金项目(CHCL10007)

摘　　要：以制备的TiO2纳米带为载体负载四磺基铁酞菁(Iron-phthalocyanine tetrasulfonic acid,FePcS),得到FePcS-TiO2复合体催化剂.通过紫外可见漫反射光谱(UV-vis DRS)对催化剂进行了表征.同时以有机染料罗丹明B(Rhodamine B,RhB)和无色小分子水杨酸(Salicylic acid,SA)为降解对象探讨了光催化活化分子氧降解有毒有机污染物的催化活性.实验结果表明:在可见光照射下(λ≥420 nm),FePcS-TiO2复合体光催化剂的催化性能较好,光照240 min后使有机污染物RhB褪色率达到100%,14 h后矿化率达到100%;光照10 h后对无色小分子有机物SA降解率达到83.17%,表明FePcS-TiO2对有机物的光催化降解是一个深度矿化的过程.降解过程主要涉及羟基自由基(.OH)的氧化机理.Compound catalyst FePcS-TiO2 was prepared using TiO2 nanobelt as support to load iron-phthalocyanine tetrasulfonic acid（FePcS）.UV-visible diffuse reflectance（UV-vis DRS） was employed to characterize the catalyst.The photocatalytic degradation of organic dye rhodamine B（RhB） and colorless small molecular organic substance salicylic acid（SA） were used as probe reactions to evaluate the photocatalytic activity of the catalyst.The results indicated that FePcS-TiO2 had good photocatalytic properties under visible light irradiation（λ≥420 nm）.RhB can be efficiently degraded by FePcS-TiO2 under visible light irradiation with 100% decolorization after 240min and 100% mineralization rate after 14h,while SA was degraded by 83.17% under visible irradiation for 10h.The photocatalytic degradation of toxic organic pollutants was a process of deep oxidation and the oxidative process was predominated mainly by the hydroxyl radical（·OH）.

关 键 词：FePcS-TiO2 光催化 降解 矿化 

分 类 号：O643.36[理学—物理化学]