以Ti(SO4)2 为原料, 在一定温度下直接水解、胶溶、加入晶种、熟化, 制备出单分散性、热稳定性良好、平均粒径在22nm左右、比表面积在80m2/g以上的TiO2纳米微粒.研究了Ti(SO4)2 浓度、水解时间及晶种对纳米微粒粒径的影响.对样品进行了TG-DTA, XRD和SEM分析.结果表明: 样品经真空冷冻干燥后, TiO2粉体主要为锐钛矿型, 且随焙烧时间增加和温度升高, 其金红石型含量显著增多, 粉体粒径也有一定增大, 但在不同的温度区间粒径增长速率有较大的区别.
参考文献
| [1] | Hoffman M R;Martin S T;Choi W .Environmental application of semiconductor photocatalysis[J].Chemical Reviews,1995,95(01):69-96. |
| [2] | Jung K Y;Park S B .Enhanced photocatativity of silica-embeclded titania prepared by sel-gel process for the decomposition of trichloroethylene[J].Applied Catalysis B:Environmental,2000,25(04):249-256. |
| [3] | Bacsa R R;Kiwi J .Effect of rutile phase on the photocatalytic properties of nanocrystalline titania during the degradation of p-coumaric acid[J].Applied Catalysis B:Environmental,1998,16:19-29. |
| [4] | Deo G;Turek A M;Wachs I E et al.Physical and chemical characterization of surface vanadium oxide supported on titania:influence of the titania phase (anatase,rutile,brookite and B)[J].Applied Catalysis A:General,1992(91):27-42. |
| [5] | 张汝冰,高濂.以正钛酸为原料制备纳米TiO2光催化剂[J].无机材料学报,2002(02):253-258. |
| [6] | Anderson M A;Rubin A J;刘莲生.水溶液吸附化学[M].北京:科学出版社,1989:89-90. |
| [7] | 刘颖;王长葆;王建华 .超细Fe3O4粉分散体系的制备[J].功能材料,1999,30(01):24-28. |
| [8] | Ogawa H;Abe A .Preparation of tin oxide films from ultrafine particle[J].Journal of the Electrochemical Society,1981,128(03):685-689. |
| [9] | 刘河洲,胡文彬,顾明元,吴人洁.纳米TiO2晶粒生长动力学研究[J].无机材料学报,2002(03):429-436. |
| [10] | Fu XZ.;Yang Q.;Anderson MA.;Zeltner WA. .CATALYTIC HYDROLYSIS OF DICHLORODIFLUOROMETHANE (CFC-12) ON SOL-GEL-DERIVED TITANIA UNMODIFIED AND MODIFIED WITH H2SO4[J].Journal of Catalysis,1997(2):482-490. |
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%