以纳米微晶纤维素(NCC)为模板剂,采用酸催化水解法制备了球形介孔TiO2 (SP-TiO2).并采用扫描电镜、透射电镜、X射线衍射、紫外-可见漫反射光谱和低温N2吸附-脱附等手段对其进行了表征.结果表明,所制SP-TiO2为直径100～200 nm的规整球形颗粒,单个球形颗粒由粒径为10～20 nm的TiO2小晶粒组成.其介孔孔径为8.2～13.5 nm,且随焙烧温度的升高而增大.NCC长链结构之间羟基键合所形成的狭小空间构成的微反应器,可有效限制TiO2前驱体的生长和团聚,诱导其晶粒自组装成球形结构,并抑制由锐钛矿相向金红石相转变.600 ℃焙烧的SP-TiO2表现出最高的光催化活性,对苯酚降解率达89％.
参考文献
| [1] | Pan J H;Zhao X S;Lee W I .[J].Chemical Engineering Journal,2011,170:363. |
| [2] | Zhang Q;Li W;Liu S X .[J].Powder Technology,2011,212:145. |
| [3] | 沈俊,田从学,张昭.介孔二氧化钛的非有机模板剂法合成[J].催化学报,2006(11):949-951. |
| [4] | Zhao L L;Yu Y;Song L X;Ruan M L Hu X F Larbot A .[J].Applied Catalysis A:General,2004,263:171. |
| [5] | Tian C X;Zhang Z;Hou J;Luo N .[J].Materials Letters,2008,62:77. |
| [6] | 陈闪山,朱银华,李伟,刘维佳,李力成,杨祝红,刘畅,姚文俊,陆小华,冯新.含TiO2（B）介孔氧化钛材料的制备、特性和应用[J].催化学报,2010(06):605-614. |
| [7] | 刘兴平,蒋荣英,柳松.TiO2/Mo-TiO2的制备、表征和光催化活性[J].催化学报,2010(11):1381-1387. |
| [8] | Antonelli D M;Ying J Y .[J].Angewandte Chemie International Edition,1995,34:2014. |
| [9] | Yang P D;Zhao D Y;Margolese D I;Chmelka B F Stucky G D .[J].Nature,1998,396:152. |
| [10] | Yusuf M M;Imai H;Hirashimal H .[J].Journal of Sol-Gel Science and Technology,2003,28:97. |
| [11] | Zhao J Q;Wan P;Xiang J;Tong T Dong L Gao Z N Shen X Y Tong H .[J].Microporous and Mesoporous Materials,2011,138:200. |
| [12] | Sheng Q;Cong Y;Yuan S;Zhang J Anpo M .[J].Microporous and Mesoporous Materials,2006,95:220. |
| [13] | Shamaila S;Sajjad A K L;Chen F;Zhang J L .[J].Catalysis Today,2011,175:568. |
| [14] | Chen D H;Huang F Z;Cheng Y B;Caruso R A .[J].Advanced Materials,2009,21:2206. |
| [15] | Revol J F;Bradford H;Giasson J;Marchessault R H Gray D G .[J].International Journal of Biological Macromolecules,1992,14:170. |
| [16] | Filson, PB;Dawson-Andoh, BE .Sono-chemical preparation of cellulose nanocrystals from lignocellulose derived materials[J].Bioresource Technology,2009(7):2259-2264. |
| [17] | Marques P A A P;Trindade T;Neto C P .[J].Composites Science and Technology,2006,66:1038. |
| [18] | Lu QY;Gao F;Komarneni S .Cellulose-directed growth of selenium nanobelts in solution[J].Chemistry of Materials: A Publication of the American Chemistry Society,2006(1):159-163. |
| [19] | Dujardin E.;Blaseby M.;Mann S. .Synthesis of mesoporous silica by sol-gel mineralisation of cellulose nanorod nematic suspensions[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2003(4):696-699. |
| [20] | Shin Y;Exarhos G J .[J].Materials Letters,2007,61:2594. |
| [21] | Zhou Y;Ding EY;Li W D .[J].Materials Letters,2007,61:5050. |
| [22] | Ihara T;Miyoshi M;Iriyama Y;Matsumoto O Sugihara S .[J].Applied Catalysis B:Environmental,2003,42:403. |
| [23] | 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. |
| [24] | Parida, K.M.;Naik, B. .Synthesis of mesoporous TiO_(2 - x)N_x spheres by template free homogeneous co-precipitation method and their photo-catalytic activity under visible light illumination[J].Journal of Colloid and Interface Science,2009(1):269-276. |
| [25] | Yu JG;Wang GH;Cheng B;Zhou MH .Effects of hydrothermal temperature and time on the photocatalytic activity and microstructures of bimodal mesoporous TiO2 powders[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2007(3/4):171-180. |
| [26] | Yu J G;Yu J C;Ho W K;Leung M K P Cheng B Zhang G K Zhao X J .[J].Applied Catalysis A:General,2003,255:309. |
| [27] | Kumar K N P;Kumar J;Keizer K .[J].Journal of the American Ceramic Society,1994,77:1396. |
| [28] | Yu JC.;Yu JU.;Ho WK.;Jiang ZT.;Zhang LH. .Effects of F- doping on the photocatalytic activity and microstructures of nanocrystalline TiO2 powders[J].Chemistry of Materials,2002(9):3808-3816. |
| [29] | Liu S X;Chen X Y;Chen X .[J].Journal of Hazardous Materials,2007,143:257. |
| [30] | 陈孝云,刘守新,陈曦.活性炭修饰对TiO2形态结构及光催化活性的影响[J].应用化学,2006(11):1218-1222. |
| [31] | 张青红,高濂,郭景坤.量子尺寸氧化钛纳米晶的制备及其光谱研究[J].无机材料学报,2000(05):929-934. |
| [32] | 高濂;郑珊;张青红.纳米氧化钛光催化材料及应用[M].北京:化学工业出版社,2003:60. |
| [33] | 李晓辉,陈孝云,刘守新,陈曦,王海亮,刘正峰.纳米TiO2光催化剂的酸催化水解合成与表征[J].应用化学,2007(11):1279-1283. |
| [34] | Gao F;Lu QY;Meng XK;Komarneni S .Synthesis of nanorods and nanowires using biomolecules under conventional- and microwave-hydrothermal conditions[J].Journal of Materials Science,2008(7):2377-2386. |
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%