Preparation and Photocatalytic Properties of La Doped Bi2WO6 Nanomaterials
ZHANG Xiang-hui
Henan Key Laboratory of Electromagnetic Transformation and Detection, College of Physics and Electronic Information, Luoyang Normal University, Luoyang 471934, Henan, China
Abstract：La doped Bi2WO6 nanomaterials were synthesized by one step hydrothermal method using Bi(NO3)3·5H2O, Na2WO4·2H2O and La(NO3)3·6H2O as the raw materials. The phase composition and optical property of the as-prepared materials were systematically characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy and BET surface area. XRD result reveals that La is doped in Bi2WO6 successfully, and the prepared samples still possess orthorhombic structure. UV-Vis study shows the absorption edge of the prepared samples has a red-shift with the increase of La doping, indicating that La doping can broaden the absorbance range of the La doped Bi2WO6 materials. BET measurement shows that the specific surface area of La doped Bi2WO6 materials is increased with more La doping. In addition, the effect of La doping on the photocatalytic activities of the samples were measured by the degradation of methylene blue (MB). Results show that the best photocatalytic property is found in the 2.0% La doped Bi2WO6 nanomaterial; after 120min of reaction, the degradation rate of MB reaches 91%.
[1] 赫荣安,曹少文,余家国.铋系光催化剂的形貌调控与表面改性研究进展[J].物理化学学报,2016,32(12):2841-2870. HE R A,CAO S W,YU J G.Recent advances in morphology control and surface modification of Bi-based photocatalysts[J].Acta Physico-Chimica Sinica,2016,32(12):2841-2870.
[2] 王泽岩,黄柏标,戴瑛.高效光催化材料的设计与制备[J].中国材料进展,2017,36(1):7-16. WANG Z Y,HUANG B B,DAI Y.Design and synthesis of highly reactive photocatalysts[J].Materials China,2017,36(1):7-16.
[3] 黄凤萍,崔梦丽,张双,等.高硅氧纤维负载纳米Dy/TiO2薄膜的制备及性能[J].材料工程,2017,45(7):66-70. HUANG F P,CUI M L,ZHANG S,et al.Preparation and properties of nano Dy/TiO2 films supported on high silica fiber[J].Journal of Materials Engineering,2017,45(7):66-70.
[4] WANG W K,CHEN J J,LI W W,et al.Synthesis of Pt-loaded self-Interspersed anatase TiO2 with a large fraction of (001) facets for efficient photocatalytic nitrobenzene degradation[J].ACS Applied Materials & Interfaces,2015,7(36):20349-20359.
[5] 赵燕茹,马建中,刘俊莉.可见光响应型ZnO基纳米复合光催化材料的研究进展[J].材料工程,2017,45(6):129-137. ZHAO Y R,MA J Z,LIU J L.Research progress on visible-light responding ZnO-based nanocomposite photocatalyst[J].Journal of Materials Engineering,2017,45(6):129-137.
[6] CHEN D M,WANG Z H,REN T Z,et al.Influence of defects on the photocatalytic activity of ZnO[J].Journal of Physical Chemistry C,2014,118(28):15300-15307.
[7] NGUYEN D T,HONG S S.The effect of solvent on the synthesis of BiVO4 using solvothermal method and their photocatalytic activity under visible light irradiation[J].Topics in Catalysis,2017,60(9/11):782-788.
[8] TAN H L,WEN X M,AMAL R,et al.BiVO4 {010} and {110} relative exposure extent:governing factor of surface charge population and photocatalytic activity[J].Journal of Physical Chemistry Letters,2016,7(7):1400-1405.
[9] ZHU G,ZHAO Q F,LI X L,et al.Visible light photocatalytic degradation of rhodamine B by Bi2WO6 prepared via microwave-assisted method[J].Journal of Materials Science:Materials in Electronics,2016,27(8):8288-8293.
[10] ZHENG H S,GUO W Q,LI S,et al.Surfactant (CTAB) assisted flower-like Bi2WO6 through hydrothermal method:unintentional bromide ion doping and photocatalytic activity[J].Catalysis Communications,2017,88:68-72.
[11] 陈颖,王旭,谷国栋,等.Co2+掺杂对Bi2WO6结构与光催化活性的影响[J].硅酸盐通报,2014,33(10):2626-2630. CHEN Y,WANG X,GU G D,et al.Effects of doping Co2+ on the structure and photocatalytic activity of Bi2WO6[J].Bulletin of the Chinese Ceramic Society,2014,33(10):2626-2630.
[12] KUDO A,HIJⅡ S.H2 or O2 evolution from aqueous solutions on layered oxide photocatalysts consisting of Bi3+ with 6s2 configuration and d0 transition metal ions[J].Chemistry Letters,1999,28(10):1103-1104.
[13] TANG J W,ZOU Z G,YE J H.Photocatalytic decomposition of organic contaminants by Bi2WO6 under visible light irradiation[J].Catalysis Letters,2004,92:53-56.
[14] 郑玉芹,谈国强,博海洋,等.pH值对Bi2WO6粉体的微波水热法合成及光催化性能的影响[J].硅酸盐学报,2011,39(3):481-485. ZHENG Y Q,TAN G Q,BO H Y,et al.Effect of pH value on synthesis of Bi2WO6 powders by microwave hydrothermal method and photocatalytic properties[J].Journal of the Chinese Ceramic Society,2011,39(3):481-485.
[15] 余忠雄,向垒,钟方龙,等.pH对低温燃烧法合成钨酸铋光催化降解罗丹明B的影响[J].无机材料学报,2015,30(5):535-541. YU Z X,XIANG L,ZHONG F L,et al.Effects of solution pH on photocatalytic degradation of rhodamine B using bismuth tungstate prepared by low-temperature combustion method[J].Journal of Inorganic Materials,2015,30(5):535-541.
[16] HE D Q,WANG L L,LI H Y,et al.Self-assembled 3D hierarchical clew-like Bi2WO6 microspheres:synthesis, photo-induced charges transfer properties, and photocatalytic activities[J].Cryst Eng Comm,2011,13:4053-4059.
[17] ZHANG X H,GAI W Z.Effect of surfactant on the photocatalytic activity of Bi2WO6 nanoparticles[J].Journal of Materials Science:Materials in Electronics,2017,28(13):9777-9781.
[18] SHANG M,WANG W Z,SUN S M,et al.Bi2WO6 nanocrystals with high photocatalytic activities under visible light[J].Journal of Physical Chemistry C,2008,112:10407-10411.
[19] 宋丽花,谈国强,夏傲,等.反应温度对微波水热法合成Bi2WO6粉体及光催化性能影响的研究[J].无机化学学报,2011,27(11):2133-2137. SONG L H,TAN G Q,XIA A,et al.Effect of reaction temperature on microwave-hydrothermal synthesis and photocatalytic properties of Bi2WO6 powders[J].Chinese Journal of Inorganic Chemistry,2011,27(11):2133-2137.
[20] 郑化杰,孟繁梅,关毅,等.掺杂型Bi2WO6可见光光催化材料的最新研究进展[J].功能材料,2016,47(12):12076-12082. ZHENG H J,MENG F M,GUAN Y,et al.Latest studies of doped Bi2WO6 visible light photocatalyst materials[J].Journal of Functional Materials,2016,47(12):12076-12082.
[21] LI W T,HUANG W Z,ZHOU H,et al.Synthesis and photo activity enhancement of Ba doped Bi2WO6 photocatalyst[J].Materials Research Bulletin,2015,64:432-437.
[22] 王丹军,岳林林,郭莉,等.Fe3+掺杂三维分级纳米Bi2WO6的合成及其光催化活性增强机理[J].无机化学学报,2014,30(4):961-968. WANG D J,YUE L L,GUO L,et al.Synthesis and enhanced photocatalytic mechanism of Fe3+ doped three-dimensional Bi2WO6 hierarchical nanoarchitectures[J].Chinese Journal of Inorganic Chemistry,2014,30(4):961-968.
[23] ETOGO A,LIU R,REN J B,et al.Facile one-pot solvothermal preparation of Mo-doped Bi2WO6 biscuit-like microstructures for visible-light-driven photocatalytic water oxidation[J].Journal of Materials Chemistry A,2016,4(34):13242-13250.
[24] AHSAINE H A,EL JAOUHARI A,SLASSI A,et al.Electronic band structure and visible-light photocatalytic activity of Bi2WO6:elucidating the effect of lutetium doping[J].RSC Advances,2016,6(103):101105-101114.
[25] LI J,NI G,HAN Y,et al.Synthesis of La doped Bi2WO6 nanosheets with high visible light photocatalytic activity[J].Journal of Materials Science:Materials in Electronics,2017,28(14):10148-10157.
[26] GU H D,YU L,WANG J,et al.Tunable luminescence and enhanced photocatalytic activity for Eu(Ⅲ) doped Bi2WO6 nanoparticles[J].Spectrochimica Acta Part A:Molecular and Biomolecular Spectroscopy,2017,177:58-62.
[27] 刘国聪,金真,张喜斌,等.La掺杂BiVO4微米球的水热合成和光催化性能[J].中国有色金属学报,2013,23(3):793-801. LIU G C,JIN Z,ZHANG X B,et al.Hydrothermal synthesis and photocatalytic properties of La-doped BiVO4 microspheres[J].The Chinese Journal of Nonferrous Metals,2013,23(3):793-801.
[28] 孟婉婉,胡瑞生,杨军,等.La掺杂BiFeO3对苯酚光催化降解性能的影响[J].催化学报,2016,37(8):1283-1292. MENG W W,HU R S,YANG J,et al.Influence of lanthanum-doping on photocatalytic properties of BiFeO3 for phenol degradation[J].Chinese Journal of Catalysis,2016,37(8):1283-1292.
2018, Vol. 46 
