改性蛭石负载Fe、N共掺杂TiO_2光催化剂的制备及可见光降解苯酚研究  

Preparation and photodegradation of phenol on modified-vermiculite supported Fe,N co-doped TiO_2 photocatalyst under visible light

作　　者：王兰[1] 曾琪静[1] 

机构地区：[1]中国科学院新疆理化技术研究所环境科学与技术研究室,乌鲁木齐830011

出　　处：《化工新型材料》2016年第9期107-109,共3页New Chemical Materials

基　　金：新疆维吾尔自治区自然科学基金(2013211B33)

摘　　要：以改性蛭石为载体,采用水热反应-热处理方法合成了负载型Fe、N共掺杂二氧化钛(TiO_2)纳米光催化材料。利用XRD、UV-Vis DRS、BET和EPR对其结构进行表征。以苯酚溶液为目标降解物,研究所制备样品在可见光下(≥400nm)的光催化活性。结果表明,改性蛭石载体有利于锐钛矿相和大比表面积TiO_2纳米晶的形成;Fe3+和N原子的掺杂及相应产生的氧空位使TiO_2带隙变窄,将光响应范围拓展到了可见光区,同时有利于光生电子-空穴的分离;在可见光照射下,对苯酚具有良好的光催化降解去除效果。Supported Fe,N co-doped TiO2 composite photocatalysts were prepared via a hydrothermal reaction in combination with post-annealing using modified-vermiculite as support.XRD,UV-Vis DRS,BET and EPR technologies were used to characterize the microstructure of photocatalysts.The corresponding results showed that the modified-vermiculite favored the formation of anatase TiO2 nanoparticles with large specific surface area and abundant mesoporous structure.Fe-N co-doping and the formation of oxygen vacancy can not only decrease the band gap of TiO2 and expanded it photoresponse to the visible region,but also promoted the separation of photogenerated electrons and holes.the material showed excellent photocatalytic performance for degrading phenol under visible light irradiation.

关 键 词：负载 TiO2 Fe、N共掺杂 苯酚 可见光 

分 类 号：O643.36[理学—物理化学]