以四氯化钛为钛源,离子液体1-丁基-3-甲基咪唑六氟磷酸盐([Bmim] PF6)/水为混合溶剂,采用液相水解-沉淀法合成纳米TiO2光催化剂.以苯酚为模型物,考察了TiO2紫外下催化活性.采用XRD、TG/DSC、TEM、FTIR、DRS、低温N2物理吸附-脱附等技术对催化剂的结构进行表征.结果表明,在离子液体/水混合溶剂中合成TiO2的光催化活性较纯水溶剂中合成TiO2的光催化活性高,且在较宽的活化温度范围内(500 ～ 700℃)都表现出较高的光催化活性.这一结果可归因于在离子液体/水混合介质中合成的TiO2颗粒小、分散性好、比表面积大(138 m2/g)、吸附性能强.另外,离子液体的存在一定程度上降低了TiO2粒子表面羟基数量及表面酸度,提高了锐钛矿相TiO2向金红石相转变的温度.
参考文献
| [1] | Zheng, W.;Liu, X.;Yan, Z.;Zhu, L. .Ionic liquid-assisted synthesis of large-scale TiO_2 nanoparticles with controllable phase by hydrolysis of TiCl_4[J].ACS nano,2009(1):115-122. |
| [2] | Paramasivam I;Macak J M;Selvam T et al.Electrochemical synthesis of self-organized TiO2 nanotubular structures using an ionic liquid[Bmim]BF4[J].Electrochimica Acta,2008,54(02):643-64g. |
| [3] | Kristof Demeestere;Jo Dewulf;Teruhisa Ohno;Pepe Herrera Salgado;Herman Van Langenhove .Visible light mediated photocatalytic degradation of gaseous trichloroethylene and dimethyl sulfide on modified titanium dioxide[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2005(1/2):140-149. |
| [4] | 邵艳群,唐电,熊惟皓,张腾.Sol-gel法制备纳米TiO2锐钛矿相的晶化动力学[J].材料热处理学报,2003(04):46-50. |
| [5] | Herrmann J M;Matos J;Disdier J et al.Solar photocatalytic degradation of 4-chlorophenol using the synergistic effect between titania and activated carbon in aqueous suspension[J].Catalysis Today,1999,54(2-3):255-265. |
| [6] | Eun Hyung Choi;Suk-In Hong;Dong Ju Moon .Preparation of Thermally Stable Mesostructured Nano-sized TiO2 Particles by Modified Sol-Gel Method Using Ionic Liquid[J].Catalysis Letters,2008(1/2):84-89. |
| [7] | Torimoto T;Okawal Y .Effect of activated carbon content in TiO2-loaded activated carbon on photodegradation behaviors of dichloromethane[J].Journal of Photochemistry and Photobiology A:Chemistry,1997,103(1-2):153-157. |
| [8] | 陈孝云 .可见光响应TiO<,2>与TiO<,2>/活性炭复合材料的合成及表征[D].东北林业大学,2007. |
| [9] | 吕珺 |
| [10] | 纪红兵,佘远斌.绿色化学化工基本问题的发展与研究[J].化工进展,2007(05):605-614. |
| [11] | Vasile i.Parvulescu;Christopher Hardacre .Catalysis in Ionic Liquids[J].Chemical Reviews,2007(6):2615-2665. |
| [12] | Tamar L. Greaves;Calum J. Drummond .Protic Ionic Liquids: Properties and Applications[J].Chemical Reviews,2008(1):206-237. |
| [13] | Yoo, KS;Lee, TG;Kim, J .Preparation and characterization of mesoporous TiO2 particles by modified sol-gel method using ionic liquids[J].Microporous and Mesoporous Materials,2005(1/3):211-217. |
| [14] | Nakashima T;Kimizuka N .Interfacial synthesis of hollow TiO2 microspheres in ionic liquids[J].Journal of the American Chemical Society,2003,125:6386-6387. |
| [15] | 陈中胜,龚伟平,陈腾飞,熊国宣,许文苑.室温离子液体辅助制备纳米TiO2研究进展[J].化工进展,2010(06):1096-1101. |
| [16] | 曹洁明,房宝青,王军,郑明波,邓少高,马贤佳.离子液体在无机纳米材料合成上的应用[J].化学进展,2005(06):1028-1033. |
| [17] | Yong Zhou;Markus Antonietti .Synthesis of Very Small TiO_2 Nanocrystals in a Room-Temperature Ionic Liquid and Their Self-Assembly toward Mesoporous Spherical Aggregates[J].Journal of the American Chemical Society,2003(49):14960-14961. |
| [18] | Liu Y;Li J;Wang MJ;Li ZY;Liu HT;He P;Yang XR;Li JH .Preparation and properties of nanostructure anatase TiO2 monoliths using 1-butyl-3-methylimidazolium tetrafluoroborate room-temperature ionic liquids as template solvents[J].Crystal growth & design,2005(4):1643-1649. |
| [19] | Hong Liu;Yuguang Liang;Hongjiu Hu .Hydrothermal synthesis of mesostructured nanocrystalline TiO_2 in an ionic liquid-water mixture and its photocatalytic performance[J].Solid state sciences,2009(9):1655-1660. |
| [20] | 王钦,杨青林,车玉萍,郭林,邓元,嵇天浩.以偏钛酸为原料在室温离子液体中水热制备二氧化钛光催化剂[J].稀有金属,2007(z1):29-32. |
| [21] | Yoo K;Choi H;Dionysiou DD .Ionic liquid assisted preparation of nanostructured TiO2 particles[J].Chemical communications,2004(17):2000-2001. |
| [22] | Kye Sang Yoo;Hyeok Choi;Dionysios D.Dionysiou .Synthesis of anatase nanostructured TiO_2 particles at low temperature using ionic liquid for photocatalysis[J].Catalysis Communications,2005(4):259-262. |
| [23] | Yongai Zhai;Yu Gao;Fengqi Liu .Synthesis of nanostructured TiO_2 particles in room temperature ionic liquid and its photocatalytic performance[J].Materials Letters,2007(28):5056-5058. |
| [24] | 王振中,朱光明,陈北强.室温离子液体[bmim]PF6的合成[J].化学工程师,2007(06):14-16. |
| [25] | Benesi H A .Acidity of catalyst surfaces.Ⅱ.amine titration using hammett indicators[J].Journal of Physical Chemistry,1957,61:970-973. |
| [26] | 刘守新,陈孝云,陈曦.酸催化水解法制备可见光响应N掺杂纳米TiO2催化剂[J].催化学报,2006(08):697-702. |
| [27] | 陈孝云,陈星,洪时伟,陈筱,黄彪.碱法纳米纤维素模板剂合成介孔TiO2及其性能[J].催化学报,2011(11):1762-1767. |
| [28] | 白波,赵景联.纳米TiO2的微波水热法制备及其光催化性能研究[J].化学通报（印刷版）,2005(10):776-780. |
| [29] | 刘士荣,龚雁,倪忠斌,陈明清.醇热法制备介孔TiO2及其光催化性能[J].材料研究学报,2010(06):610-614. |
| [30] | Zhang Z;Wang C C;Zakaria R J et al.Role of paricle size in nanocrystalline TiO2-based photocatalysts[J].Journal of Physical Chemistry B,1998,102(52):10871-10878. |
| [31] | He X;David A .Recent advances in synthesis and application of transition metal containing mesoporous molecular sieves[J].Angewandte Chemie International Edition,2002,41:214-229. |
| [32] | Asahi R;Morikawa T;Ohwaki K et al.Visible-light photocatalysis in nitrogen-doped titanium oxides[J].Science,2001,293(5528):269-271. |
| [33] | Khan S U M;Al-Shahry M;Ingter W B .Efficient photochemical water splitting by a chemically modified N-TiO2[J].Science,2002,297:224-2245. |
| [34] | 陈孝云,陆东芳,黄锦锋,卢燕凤,郑建强.离子液体-水混合介质中合成N、F共掺杂宽光域响应多孔TiO2光催化剂及性能[J].物理化学学报,2012(01):161-169. |
| [35] | 苏雅玲,李轶,杜瑛珣,雷乐成.氟掺杂TiO2纳米管的可见光催化活性及第一性原理计算[J].物理化学学报,2011(04):939-945. |
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%