以Bi(NO3)3·5H2O、NH4VO3和Ni(NO3)2·6H2O为原料,采用水热法合成了Ni-BiVO4光催化剂,并利用XRD、SEM、XPS、Raman、UV-Vis DRS等测试手段对产品进行表征和分析,探讨不同pH值对BiVO4颗粒晶相与形貌的影响.以亚甲基蓝作为模型污染物考察Ni-BiVO4催化剂的光催化性能.结果表明,提高前驱液pH值,可得到单斜晶系白钨矿型Ni-BiVO4光催化剂.光催化剂中的Ni元素以NiO形式存在.Ni的引入使可见光吸收带发生红移,能带隙减小至2.35 eV.可见光催化降解亚甲基蓝溶液的结果表明,Ni掺杂有利于提高BiVO4的活性.其中pH值为5.0、Ni掺杂量为2.0wt％的BiVO4具有最好的光催化效果,可见光照射120 min后,对初始浓度为10 mg/L的亚甲基蓝溶液的最高降解率由纯BiVO4的77％提高到99.45％.并对Ni引入后光催化活性提高的机理进行了分析.
参考文献
| [1] | 张萍,王焕英,许保恩,次立杰,刘树彬,张星辰.化学沉淀法制备BiVO4及其表征[J].人工晶体学报,2008(03):716-720. |
| [2] | Lim AR.;Jang MS.;Choh SH. .PROMINENT FERROELASTIC DOMAIN WALLS IN BIVO4 CRYSTAL[J].Journal of Physics. Condensed Matter,1995(37):7309-7323. |
| [3] | Saimi Tokunaga;Hideki Kato;Akihiko Kudo .Selective Preparation of Monoclinic and Tetragonal BiVO_4 with Scheelite Structure and Their Phtotocatalytic Properties[J].Chemistry of Materials,2001(12):4624-4628. |
| [4] | Ponchio Chatchai;Yoshinori Murakami;Shin-ya Kishioka;Atsuko Y. Nosaka;Yoshio Nosaka .Efficient photocatalytic activity of water oxidation over WO{sub}3/BiVO{sub}4 composite under visible light irradiation[J].Electrochimica Acta,2009(3):1147-1152. |
| [5] | 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. |
| [6] | Yao W;Iwai H;Ye J .Effects of molybdenum substitution on the photocatalytic behavior of BiVO4[J].Dalton transactions: An international journal of inorganic chemistry,2008(11):1426-1430. |
| [7] | 朱振峰,张炼.钒酸铋掺杂体系的研究进展[J].中国陶瓷,2012(02):8-10. |
| [8] | M. Guillodo;J. Fouletier;L. Dessemond .Electrical properties of dense Me-doped bismuth vanadate (Me=Cu, Co) pO_2-dependent conductivity determined by impedance spectroscopy[J].Journal of the European Ceramic Society,2001(13):2331-2344. |
| [9] | Hui Xu;Huaming Li;Chundu Wu;Jinyu Chu;Yongsheng Yan;Huoming Shu;Zheng Gu .Preparation, characterization and photocatalytic properties of Cu-loaded BiVO_4[J].Journal of hazardous materials,2008(1/2):877-884. |
| [10] | Hai-qing Jiang;Hiromitsu Endo;Hirotaka Natori;Masayuki Nagai;Koichi Kobayashi .Fabrication And Efficient Photocatalytic Degradation Of Methylene Blue Over Cuo/bivo_4 Composite Under Visible-light Irradiation[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2009(3):700-706. |
| [11] | Synthesis and characterization of Ag/BiVO_4 composite photocatalyst[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2010(10):3224. |
| [12] | 陈渊,周科朝,黄苏萍,李志友,刘国聪.水热法制备Cu掺杂可见光催化剂BiVO4及其光催化性能研究[J].无机材料学报,2012(01):19-25. |
| [13] | 张爱平,张进治.水热法制备不同形貌和结构的BiVO4粉末[J].物理学报,2009(04):2336-2344. |
| [14] | 常琳,刘晶冰,王金淑,张文熊.可见光响应的铁掺杂TiO2中空微球的制备及其光催化性能[J].无机化学学报,2010(05):744-748. |
| [15] | Ma W.;Zhang M.;Lu Z. .Investigation of structural transformations in nanophase titanium dioxide by Raman spectroscopy[J].Applied physics, A. Materials science & processing,1998(6):621-627. |
| [16] | 舒火明,谢吉民,许晖,李华明,徐远国,顾正.ZnO/AgNbO3光催化剂的表征及活性研究[J].无机材料学报,2010(09):935-941. |
| [17] | Yang Hai;Bei Cheng;Jiaguo Yu .Enhanced Photocatalytic H2-Production Activity of TiO2 by Ni(OH)2 Cluster Modification[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2011(11):4953-4958. |
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%