多孔棒状FeVO_4的制备及可见光催化性能研究  

Preparation and Visible-light-driven Photocatalytic Performance of Porous Rod-like FeVO_4

作　　者：蒋海燕[1] 夏云生[2] 李育珍[3] JIANG Hai-Yanl;XIA Yun-Sheng;LI Yu-Zhen(College of Chemistry and Pharmaceutical Sciences,Qingdao Agricultural University,Qingdao 266109,China;College of Chemistry and Chemical Engineering,Bohai University,Jinzhou 121013,China;College of Environmental Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]青岛农业大学化学与药学院,青岛266109 [2]渤海大学化学化工学院,锦州121013 [3]太原理工大学环境科学与工程学院,太原030024

出　　处：《无机材料学报》2018年第9期949-955,共7页Journal of Inorganic Materials

基　　金：青岛农业大学博士启动基金(663/1113317);山西省重点研发计划(一般)社会发展项目(201703D321009-5);国家自然科学基金(21676028);大学生创新创业项目(8003-02030381)~~

摘　　要：以Fe(NO_3)_3和NH_4VO_3为无机源,氨水为pH调节剂,采用水热法制备了多种形貌纯三斜相的多孔FeVO_4。采用X射线衍射、扫描电子显微镜和紫外–可见漫反射光谱等技术表征了样品的物理性质。结果表明,水热温度和反应液的pH对晶相结构和粒子形貌有较大的影响:当水热温度为180℃,反应液的pH为4.0或7.0时,可制得多孔三斜相FeVO_4纳米棒;当水热温度为120℃,反应液的pH为4.0时制得的三斜相FeVO_4为片状结构;而当水热温度为180℃,反应液的pH升至10.0或水热温度变为240℃,反应液的pH保持4.0不变时均制得含有少量FeVO_4的Fe_2O_3。在可见光照射光催化降解甲基橙的反应中,具有最高比表面积(10.4 m^2/g)的多孔棒状FeVO_4光催化活性最高,这是因为它具有最高的结晶度、比表面积和表面氧空位密度、多孔结构和最低的带隙能。Pure triclinic porous FeVO4 with multiple morphologies were fabricated by adopting hydrothermal strategy using Fe（NO3）3 and NH4 VO3 as inorganic source and NH3 solution as pH adjuster. The samples were characterized by means of techniques such as X-ray diffraction, scanning electron microscopy, and ultraviolet-visible diffuse reflectance spectroscopy. It was found that hydrothermal temperature and pH of the precursor solution exerted a great effect on the crystalline structure and the particle morphology of the product. Porous triclinic FeVO4 nanorods were generated hydrothermally at 180℃ and pH of 4 or 7, sheet-like FeVO4 was obtained at pH 4.0 and hydrothermal temperature of 120℃. However, the mixture of Fe2 O3（in majority） and FeVO4（in minority） was prepared when pH of the precursor solution was raised to 10 at 180℃ or the hydrothermal temperature was raised to 240℃ at pH 4.0. Among the FeVO4 samples, porous FeVO4 nanorods with the highest surface area of 10.4 m^2/g exhibited the best visible-light-driven photocatalytic performance for the degradation of MO. It is concluded that such an excellent photocatalytic performance is attributed to its higher crystallinity, surface area, and surface oxygen vacancy density, porous structure, and lower bandgap energy.

关 键 词：多孔纳米棒 FEVO4 水热法 光催化活性 

分 类 号：TQ174[化学工程—陶瓷工业]