欢迎登录材料期刊网

材料期刊网

高级检索

从钛钾比较高的二钛酸钾晶须出发,通过离子交换和热处理等步骤制备了具有不同微观结构的晶须状TiO2,然后通过均相沉积-沉淀法在制得的TiO2上担载1%的Au.采用X射线衍射、扫描电镜、低温N2吸附-脱附及透射电镜等技术对催化剂样品进行了表征,并测定了其催化CO氧化反应性能.结果表明,600℃处理所得晶须状TiO2载体(T(600))具有丰富的介孔结构,比表面积为59 m2/g,平均孔径为11 nm,担载Au后其孔道结构保持良好,而800℃处理所得晶须状TiO2样品(T(800))孔结构完全坍塌,但仍保持纯锐钛矿晶型.在相同担载条件下Au/T(800)上的Au颗粒尺寸明显小于Au/T(600)上的,但两者催化CO氧化反应活性相差不大,CO完全转化温度分别为80和70℃,活性均比Au/P25的高.

参考文献

[1] Haruta M;Yamada N;Kobayashi T;Iijima S .[J].Journal of Catalysis,1989,115:301.
[2] Fu Q;Weber A;Flytzani-Stephanopoulos M .[J].Catalysis Letters,2001,77:87.
[3] Valden M;Lai X;Goodman D W .[J].Science,1998,281:1647.
[4] Yuan Z Y;Idakiev V;Vantomme A;Tabakova T Ren T Z Su B L .[J].Catalysis Today,2008,131:203.
[5] Huang P X;Wu F;Zhu B L;Gao X P Zhu H Y Yan T Y Huang W P Wu S H Song D Y .[J].Journal of Physical Chemistry B,2005,109:19169.
[6] Zhong, Z;Ho, J;Teo, J;Shen, S;Gedanken, A .Synthesis of porous alpha-Fe2O3 nanorods and deposition of very small gold particles in the pores for catalytic oxidation of CO[J].Chemistry of Materials,2007(19):4776-4782.
[7] Si R;Flytzani-Stephanopoulos M .[J].Angewandte Chemie International Edition,2008,47:2884.
[8] 李娟,塔娜,李勇,申文杰.纳米尺度CeO2在多相催化反应中的形貌效应[J].催化学报,2008(09):823-830.
[9] Tauster S J;Fung S C;Garten R L .[J].Journal of the American Chemical Society,1978,100:170.
[10] Haruta M;Tsubota S;Kobayashi T;Kageyama H Genet M J Delmon B .[J].Journal of Catalysis,1993,144:175.
[11] Zhu B L;Li K R;Feng Y F;Zhang S M Wu S H Huang W P .[J].Catalysis Letters,2007,118:55.
[12] 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.
[13] 杨祝红,暴宁钟,刘畅,冯新,谢敬伟,吉晓燕,陆小华.TiO2纤维的制备及其光催化活性研究[J].高等学校化学学报,2002(07):1371-1374.
[14] 杨祝红,暴宁钟,郑仲,刘畅,何明,冯新,陆小华.用溶剂热处理法制备TiO2纤维及其光催化降解甲基橙的活性[J].催化学报,2002(06):539-542.
[15] 史月萍,杨祝红,冯新,郑仲,陆小华.掺铂二氧化钛纤维光催化降解氯仿的研究[J].催化学报,2003(09):663-668.
[16] 周雪锋,李伟,郑仲,何明,杨祝红,冯新,陆小华.二氧化钛纤维表面担载Pt纳米结构的原子力显微镜研究[J].催化学报,2007(04):327-332.
[17] Bao N Z;Feng X;Shen L M;Lu X H .[J].Crystal Growth and Design,2002,2:437.
[18] Zanella R;Giorgio S;Henry C R;Louis C .[J].Journal of Physical Chemistry B,2002,106:7634.
[19] Liu C;He M;Lu XH;Zhang QT;Xu ZZ .Reaction and crystallization mechanism of potassium dititanate fibers synthesized by low-temperature calcination[J].Crystal growth & design,2005(4):1399-1404.
[20] Wang J G;Hammer B .[J].Physical Review Letters,2006,97:4.
[21] Yang H G;Sun C H;Qiao S Z;Zou J Liu G Smith S C Cheng H M Lu G Q .[J].Nature,2008,453:638.
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:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%