通过普通尿素沉淀法、超声协助和水热尿素法合成出高结晶度的单斜晶白钨矿型的钒酸铋粉末.利用XRD、SEM、DRS等手段分别对合成材料的晶型、微观形貌及光物理性质等进行研究.结果表明3种方法均能得到结晶度较高的钒酸铋颗粒,但微观形貌上有较大差异.在可见光下对难生化降解的红色染料FN-3G的降解效果表明,所合成的三种BiVO4样品的光催化性能均较好,超声协助法和水热法合成的样品光催化活性增强的机制主要归因于结晶度的提高和比表面积的增大.结晶度的提高可降低电子和空穴复合几率,从而增强光电转换效率;而比表面积的增大主要提高了染料分子的吸附能力.
参考文献
| [1] | Fujishima A;Honda K .Electrochemical photolysis of water at a semiconductor electrode[J].NATURE,1972,238:37-38. |
| [2] | Amy L. Linsebigler;Guangquan Lu;John T. Yates Jr. .Photocatalysis on TiO_2 Surfaces: Principles, Mechanisms, and Selected Results[J].Chemical Reviews,1995(3):735-758. |
| [3] | Zhang, C;Zhu, YF .Synthesis of square Bi2WO6 nanoplates as high-activity visible-light-driven photocatalysts[J].Chemistry of Materials,2005(13):3537-3545. |
| [4] | Long, MC;Cai, WM;Kisch, H .Photoelectrochemical properties of nanocrystalline Aurivillius phase Bi2MoO6 film under visible light irradiation[J].Chemical Physics Letters,2008(1/3):102-105. |
| [5] | Zou Z G;Ye J H;Sayama K;Arakawa H .Direct splitting of water under visible light irradiation with an oxide semiconductor photocatalyst[J].NATURE,2001,414(6864):625-627. |
| [6] | Kudo A;Onorik K;Kato H .A novel aqueous process for preparation of crystal form-controlled and highly crystalline BiVO4 powder from layered vanadates at room temperature and its photocatalytic and photophysical properties[J].Journal of the American Chemical Society,1999,121(49):11459-11467. |
| [7] | Bierlein J D;Sleight A W .Ferroelasticity in BiVO4[J].Solid State communications,1975,16(01):69-70. |
| [8] | Long M;Cai WM;Cai J;Zhou BX;Chai XY;Wu YH .Efficient photocatalytic degradation of phenol over Co3O4/BiVO4 composite under visible light irradiation[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2006(41):20211-20216. |
| [9] | Thresiamma George;Sunny Joseph;Anu Tresa Sunny;Suresh Mathew .Visible-light photocatalytic activities of α-AgVO_3 nanorods and BiVO_4 nanobars[J].International Journal of Nanotechnology,2011(10/12):963-978. |
| [10] | Zhang L;Chen D R;Jiao X L .Monoclinic structured BiVO4 nanosheets:hydrothemal preparation,formation mechanism,and coloristic and photocatalytic properties[J].The Journal of Physical Chemistry(B)Materials Surfaces Interfaces & Physical,2006,110(06):2668-2673. |
| [11] | Haimei Fan;Dejun Wang;Lingling Wang;Haiyan Li;Ping Wang;Tengfei Jiang;Tengfeng Xie .Hydrothermal synthesis and photoelectric properties of BiVO_4 with different morphologies: An efficient visible-light photocatalyst[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2011(17):7758-7762. |
| [12] | Shang M;WangWZ;RenJ;SunSM ZhangL .Anovel BiVO4 hierarchical nanostructure:controllable synthesis,growth mechanism,and application in photocatalysis[J].Cryst Eng Comm,2010,12:1754-1758. |
| [13] | Sayama K;Nomura A;Zou Z G;Abe R Abe Y Arakawa H .Photoelectrochemical decomposition of water on nano crystalline BiVO4 film electrodes under visible light[J].Chemical Communications,2003,23:2908-2909. |
| [14] | Shaohua Shen;Liang Zhao;Liejin Guo .Cetyltrimethylammoniumbromide (ctab)-assisted Hydrothermal Synthesis Of Znin_2s_4 As An Efficient Visible-light-driven Photocatalyst For Hydrogen Production[J].International journal of hydrogen energy,2008(17):4501-4510. |
| [15] | MengX;Zhang L;Dai H X;Zhao Z X Zhang R Z Liu Y X .Surfactant-assisted hydrothermal fabrication and visible-light-driven photocatalytic degradation of methylene blue over multiple morphological BiVO4 singlecrystallites[J].Materials Chemistry and Physics,2011,125(1-2):59-65. |
| [16] | 蒋海燕,戴洪兴,孟雪,张磊,邓积光,吉科猛.单斜BiVO4可见光催化降解甲基橙的形貌效应[J].催化学报,2011(06):939-949. |
| [17] | Yuanyuan Liu;Baibiao Huang;Ying Dai .Selective ethanol formation from photocatalytic reduction of carbon dioxide in water with BiVO4 photocatalyst[J].Catalysis Communications,2009(3):210-213. |
| [18] | Songmei Sun;Wenzhong Wang;Lin Zhou .Efficient Methylene Blue Removal over Hydrothermally Synthesized Starlike BiVO4[J].Industrial & Engineering Chemistry Research,2009(4):1735-1739. |
| [19] | García Pérez U M;Sepúlveda-Guzmán S;Martínez-de la C A .Nanostructured BiVO4 photocatalysts synthesized via a polyme~assisted coprecipitation method and their photo catalytic properties under visiblelight irradiation[J].Sol id State Sciences,2012,14(03):293-298. |
| [20] | Liu J B;Wang H;Wang S;Yan H .Hydrothermal prepa ration of BiVO4 powders[J].Materials Science and Engineering:B,2003,104(1 2):3639. |
| [21] | Jianqiang Yu;Akihiko Kudo .Hydrothermal Synthesis of Nanofibrous Bismuth Vanadate[J].Chemistry Letters,2005(6):850-851. |
| [22] | Xi, GC;Ye, JH .Synthesis of bismuth vanadate nanoplates with exposed {001} facets and enhanced visible-light photocatalytic properties[J].Chemical communications,2010(11):1893-1895. |
| [23] | Sun, YF;Wu, CZ;Long, R;Cui, Y;Zhang, SD;Xie, Y .Synthetic loosely packed monoclinic BiVO4 nanoellipsoids with novel multiresponses to visible light, trace gas and temperature[J].Chemical communications,2009(30):4542-4544. |
| [24] | Sun, YF;Xie, Y;Wu, CZ;Long, R .First Experimental Identification of BiVO4 center dot 0.4H(2)O and Its Evolution Mechanism to Final Monoclinic BiVO4[J].Crystal growth & design,2010(2):602-607. |
| [25] | Meng Shang;Wenzhong Wang;Songmei Sun .Efficient Visible Light-Induced Photocatalytic Degradation of Contaminant by Spindle-like PANI/BiVO4[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2009(47):20228-20233. |
| [26] | Su, JZ;Guo, LJ;Yoriya, S;Grimes, CA .Aqueous Growth of Pyramidal-Shaped BiVO4 Nanowire Arrays and Structural Characterization: Application to Photoelectrochemical Water Splitting[J].Crystal growth & design,2010(2):856-861. |
| [27] | Jiang H Y;Dai H X;Meng X;Zhang L Deng J G Liu Y X Au C T .Hydrothermal fabrication and visible-lightdriven photocatalytic properties of bismuth vanadate with multiple morphologies and/or porous structures for methyl orange degradation[J].Journal of Environmental Sciences,2010,24(03):449-457. |
| [28] | Zhao Y;Xie Y;Zhu X;Yan S Wang S X .Surfactant-free synthesis of hyperbranched monoclinic bismuth vanadate and its applications in photocatalysis,gas sensing,and lithium-ion batteries[J].Chemistry-A European Journal,2008,14(05):16011606. |
| [29] | Kohtani S;Makino S;Kudo A;Tokumura K Ishigaki Y Matsunaga T Nikaido O Hayakawa K Nakagaki R .Photocatalytic degradation of 4 wnonylphenol under irradiation from solar simulator:comparison between BiVO4 and TiO2 photocatalysts[J].Chemistry Letters,2002,31(07):660661. |
| [30] | HanMD;ChenXY;SunT;TanOK TseMS .Synthesis of mono-dispersed m-BiVO4 octahedral nano-crystals with enhanced visible light photocatalytic properties[J].CrystEng Comm,2011,13:6674-6679. |
| [31] | Geng B Y;Fang C H;Zhan F M;Yu N .Synthesis of polyhedral ZnSnO3 microcrystals with controlled exposed facets and their selective gas-sensing properties[J].SMALL,2008,4(09):1337-1343. |
| [32] | LuW;YuJ Q;ZhangY;YuDS ZhouXC .Synthesis and photocatalytic properties of BiVO4 by a citric acid complexation process[J].RARE METALS,2011,30(04):203-207. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%