以聚乙烯吡咯烷酮(PVP)为络合剂与钛酸异丙酯、醋酸锌混合制得前驱体溶液,用静电纺丝法制得PVP/Ti(OCH(CH_3)_2)_4/Zn(CH_3COO)_2复合纳米纤维,经700℃煅烧后,生成直径约300～400nm的Zn掺杂TiO_2复合纳米纤维.研究结果表明,前躯体溶液的浓度、纺丝电压和接收距离对纤维的形貌和结构有较大的影响.通过差热一热重分析、红外光谱、扫描电镜、粉末X射线衍射等手段对纳米纤维进行了表征.在日光照射下以Zn掺杂TiO_2复合纳米纤维光降解亚甲基蓝溶液,光降解效率优于TiO_2纳米纤维.
Used as a eomplexant, polyvinylpyrrolidone (PVP) was reacted with zinc acetate and tetraisopropyl titanate to prepare precursor solution which was electrospun into PVP/Ti(OCH (CH_3)_2)_4/Zn (CH_3COO)_2 composite fibers. Zn doped TiO_2 composite nanofibers with diameter of 300 ～ 400nm were prepared from PVP/Ti(OCH (CH_3)_2)_4/Zn(CH_3COO)_2 composite fibers after calcinating. The structure and configuration of composite nanofibers were influenced by the concentration of solution, the voltage of electrospinning and distance (from syringe tip to collector). The Zn doped TiO_2 composite nanofibera were characterized by TG- DSC, FT-IR, and SEM, XRD, respectively. The results indicated that Zn doped TiO_2 composite nanofibers had a better photocatalytic property than that of TiO_2 nanofibers for degradation of methylene blue with sun light.
参考文献
| [1] | Jo SM;Song MY;Ahn YR;Park CR;Kim DY .Nanofibril formation of electrospun TiO2 fibers and its application to dye-sensitized solar cells[J].Journal of Macromolecular Science. Pure and Applied Chemistry,2005(11):1529-1540. |
| [2] | Young Cheol Lee;Young Jin Jung;Pyoung Yong Park;Kyung Hyun Ko .Preparation of TiO_2 Powder by Modified Two-Stage Hydrolysis[J].Journal of Sol-Gel Science and Technology,2004(1):21-28. |
| [3] | I N Kholmanov;E Barborini;S Vinati .The influence of the precursor clusters on the structural and morphological evolution of nanostructured TiO_2 under thermal annealing[J].Nanotechnology,2003(11):1168-1173. |
| [4] | 张青龙,沈毅,吴国友,李真,朱华.纳米TiO2的掺杂改性及应用进展研究[J].稀有金属快报,2005(12):6-10. |
| [5] | Martra G. .Lewis acid and base sites at the surface of microcrystalline TiO2 anatase: relationships between surface morphology and chemical behaviour[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2000(1/2):275-285. |
| [6] | 常国庆,郑曦,陈日耀,陈晓,陈力勤,陈震.同轴静电纺丝法在纳米中空Ti02纤维中填充Ag的应用[J].物理化学学报,2008(10):1790-1796. |
| [7] | 吴自清,金名惠,邱于兵.TiO2/SiO2/Fe3O4的光催化性能及动力学[J].化工进展,2006(01):69-73. |
| [8] | 周秀文,朱祖良,赵君科,杨睿戆.TiO2/CdS复合半导体光催化剂降解甲基橙的实验研究[J].环境污染治理技术与设备,2006(01):106-109. |
| [9] | 徐瑞银,王殿芳,王禹,谷庆宝,李发生.用于染料废水光降解处理的催化剂及其作用机制[J].北京石油化工学院学报,2004(02):26-31. |
| [10] | 赵冬梅,张贞浴,杜宇红,陈九顺.基于静电纺丝技术制备Zn2+掺杂TiO2纳米纤维[J].黑龙江大学自然科学学报,2007(03):407-410. |
| [11] | 彭秧,侯林瑞,原长洲.ZnO/TiO2 纳米管复合材料的制备及其光催化性能[J].新疆大学学报（自然科学版）,2007(02):195-199. |
| [12] | 孙旋,刘红,赵惠忠,南昊.纳米ZnO-TiO2复合光催化剂的制备与表征[J].武汉科技大学学报（自然科学版）,2007(06):595-598. |
| [13] | 丁士文,王利勇,张绍岩,刘淑娟,丁宇,刘燕朝,康全影.纳米TiO2-ZnO复合材料的合成、结构与光催化性能[J].无机化学学报,2003(06):630-635. |
| [14] | 刘亮,王小华,宋卫坤,林雨.ZnO-TiO2在三相光催化反应器中降解酸性大红的研究[J].环境科学与技术,2008(02):31-34. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%