分别采用钛酸四丁酯(无水乙醇作为溶剂)和稳定的四氯化钛(蒸馏水作为溶剂)为两种钛源,以加糖热解法[1]在不同的温度下处理得到二氧化钛粉体,并利用扫描电镜和X射线衍射对粉体微观结构和晶型进行分析.结果表明,两种制备方法得到的粉体晶粒尺寸均一,在50 nm左右.而锐钛矿和金红石型的成相温区存在明显差异:前者在300到500℃之间合成出较纯的锐钛矿相,600到700℃之间完成锐钛矿到金红石型的晶相转变;后者300℃就已经形成较好的锐钛矿结晶相,晶相转变发生在700到900℃之间.而两种方法的成相温度均低于一般方法.
Ti(OBu)_4 with absolute alcohol as solvent and stabilized TiCl_4 with distilled water as solutes were employed to be titanium resources, respectively, and TiO_2 powders were obtained by pyrogenation-with-sugar-protection method. The microstructure and crystal type were analyzed by SEM and XRD. Results show that the obtained powders by both methods have uniform size of about 500 nm. However there are obvious differences in phase-formation temperature regions of anatase and rutile phase. The former method can synthesize pure anatase at 300-500 ℃ and phase transformation to rutile is finished at 600-700 ℃. In the later method good anatase phases have been formed at 300 ℃ and phase transferred at 700-900 ℃, The phase formation temperatures of the two methods are both lower than commonly used method.
参考文献
| [1] | Sun L et al.[J].Materials Chemistry and Physics,2009,113(01):329. |
| [2] | Fujishima A;Honda K .[J].Nature,1972,238:37. |
| [3] | He M;Lu XH;Feng X;Yu L;Yang ZH .A simple approach to mesoporous fibrous titania from potassium dititanate[J].Chemical communications,2004(19):2202-2203. |
| [4] | HawladerM N A;UddinM S;Zhu H J .[J].International Journal of Solar Energy,2000,20(04):227. |
| [5] | Hoon Park;Hyun Seock Jie;Keun-Hwa Chae et al.[J].Current Applied Physics,2005,8:778. |
| [6] | Dong-Gen Huang .[J].化学学报,2006,64(17):1805. |
| [7] | Sharma SD;Singh D;Saini KK;Kant C;Sharma V;Jain SC;Sharma CP .Sol-gel-derived super-hydrophilic nickel doped TiO2 film as active photo-catalyst[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2006(1):40-46. |
| [8] | Zhong Faguo .[J].Journal of Chemical Engineering of Chinese Universities,2006,20(01):138. |
| [9] | Fan Jinshan .[J].Journal of the Synthetic Crystals,2006,35(02):347. |
| [10] | Lin H F;Tung C Y;Lin H M et al.[J].Nano-Structured Materials,1997,9(1-8):697. |
| [11] | Lin H;Kumon S;Kozuka H et al.[J].Thin Solid Films,1998,315:266. |
| [12] | Yu Jiaguo;Zhao Xiujian;Zhao Qingnan .[J].Materials Chemistry and Physics,2001,69:25. |
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