Morphology evolution in hydrothermal synthesis of mesoporous alumina

被引：0

作者：

Li, Yan-Hui ^{[1
]}

Peng, Cheng ^{[1
]}

Zhao, Wei ^{[1
]}

Bai, Ming-Min ^{[1
]}

Rao, Ping-Gen ^{[1
]}

机构：

[1] School of Materials Science and Engineering, South China University of Technology, Guangzhou

来源：

Wuji Cailiao Xuebao/Journal of Inorganic Materials | 2014年 / 29卷 / 10期

关键词：

Boehmite; γ-Al[!sub]2[!/sub]O[!sub]3[!/sub; Mesoporous; Photoluminescence; Topotactical;

D O I：

10.15541/jim20140104

中图分类号：

学科分类号：

摘要：

Boehmite with varied morphologies was successfully synthesized from aluminum ammonium sulfate hydrate and urea, as well as poly-glycol-2000 by hydrothermal method. The experimental results show that boehmite microspheres, microfibers and 3D hierarchical structured AlOOH can be fabricated only by adjusting hydrothermal temperature. SEM images indicate that boehmite decomposes into γ-Al2O3 phase after heat-treatment through a topotactical process. TEM studies present that the mesopores are formed in γ-Al2O3 particles. Based on these investigations, a temperature-dependent morphology formation mechanism is proposed. Besides, the as-synthesized alumina excited at 325 nm shows emission in the range of 380 nm to 500 nm, centered at 409 nm and 467 nm.

引用

页码：1115 / 1120

页数：5

共 33 条

[1] Uddin A., Tsuda H., Wu S., Et al., Catalytic decomposition of biomass tars with iron oxide catalysts, Fuel, 87, 4, pp. 451-459, (2008)
[2] Zhu Z., Liu H., Sun H., Et al., Surfactant assisted hydrothermal and thermal decomposition synthesis of alumina microfibers with mesoporous structure, 155, 3, pp. 925-930, (2009)
[3] Pham A.L.T., Lee C., Doyle F.M., Et al., A silica-supported iron oxide catalyst capable of activating hydrogen peroxide at neutral pH values, 43, 23, pp. 8930-8935, (2009)
[4] Reddy C., Cao S.A.W., Tan O., Et al., Preparation and Characterization of Iron Oxide-zirconia Nano Powder for Its Use as an Ethanol Sensor Material, (2012)
[5] Biswal R.C., Pure and Pt-loaded gamma iron oxide as sensor for detection of sub ppm level of acetone, Sens Actuators B, 157, 1, pp. 183-188, (2011)
[6] Guardia P., Labarta A., Batlle X., Tuning the size, the shape, and the magnetic properties of iron oxide nanoparticles, 115, 2, pp. 390-396, (2010)
[7] Laurent S., Forge D., Port M., Et al., Magnetic iron oxide nanoparticles: synthesis, stabilization, vectorization, physicochemical characterizations, and biological applications, 108, 6, (2008)
[8] Brezesinski T., Wang J., Tolbert S.H., Et al., Ordered mesoporous α-MoO<sub>3</sub> with iso-oriented nanocrystalline walls for thin-film pseudocapacitors, 9, 2, pp. 146-151, (2010)
[9] Vivero-Escoto J.L., Slowing I.I., Trewyn B.G., Et al., Mesoporous silica nanoparticles for intracellular controlled drug delivery, Small, 6, 18, pp. 1952-1967, (2010)
[10] Chen D., Huang F., Cheng Y.B., Et al., Mesoporous anatase TiO<sub>2</sub> beads with high surface areas and controllable pore sizes: a superior candidate for high-performance dye-sensitized solar cells, 21, 21, pp. 2206-2210, (2009)

← 1 2 3 4 →