Synthesis and Characterization of Flower-Like Co–La Oxide Micro/Nano Materials

Abstract:

Flower-like Co–La oxide micro/nanomaterials have been synthesized via an ethylene-glycol-mediated process, under the condition of that the mole ratio of lanthanum nitrate (La (NO₃)₃·6H₂O) and cobalt nitrate (Co (NO₃)₂·6H₂O) was 1:1 (based on the amount of Co (NO₃)₂·6H₂O 0.002 mol), the dosage of urea was 2.2 g, the dosage of tetra-butyl ammonium bromide (TBAB) was 6.0 g, with magnetic stirring heating under 170 °C for 60 minutes in the 150mL ethylene glycol, the prepared precursors of Co–La oxides have regular flower-like morphology, in addition, the amount of TBAB and urea plays a significant role on the synthesis of the precursors. The flower-like Co–La oxides micro/nanomaterials were prepared after the precursors were calcinated in the muffle furnace at 800 °C for 2 h, the morphology, crystal properties and element distribution of the products were investigated by the analysis of SEM-EDX, XRD and BET, etc. The structures of these products with regular flower-like morphology are on the micrometer scale, which are hierarchically composed of nanosized building blocks, with highly polycrystalline nature, and the Brunauer–Emmett–Teller (BET) surface area of 68.5 m²/g. Therefore, those micro/nanomaterials have been developed as promising catalytic materials for their not only keeping the high surface area of nanomaterials, but effectively inhibiting aggregation.

• Periodical: Advanced Materials Research (Volume 1058)
• Pages: 25-29
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1058.25
• Online since: November 2014
• Authors: Shi Jing Lin*, Wu Tong Du, Ting Ting Ding, Yu Zhao, You Zhao, Hua Rong, La Ga Tong
• Keywords: Co–La Oxide, Ethylene-Glycol-Mediated Process, Flower-Like Morphology, Micro/Nanomaterials

References

[1] M.K. Jia, G.J. Su, M.H. Zheng, B. Zhang, S.J. Lin, Synthesis of a magnetic micro/nano FexOy-CeO2 composite and its application for degradation of hexachlorobenzene, Sci. China Chem. 53 (2010) 1266−1272.

DOI: 10.1007/s11426-010-3164-3

[2] L. F. Liotta, G. Di Carlo, A. Longo, G. Pantaleo, G. Deganello, G. Marci, A. Martorana, Structural and morphological properties of Co-La catalysts supported on alumina/lanthana for hydrocarbon oxidation, J. Non-Cryst. Solids 345&346(2004)620-623.

DOI: 10.1016/j.jnoncrysol.2004.08.109

[3] J.Y. Luo, M. Meng, X. Li, X.G. Li, Y.Q. Zha, T.D. Hu, Y.N. Xie, J. Zhang, Mesoporous Co3O4-CeO2 and Pd/ Co3O4-CeO2 catalysts: Synthesis, characterization and mechanistic study of their catalytic properties for low-temperature CO oxidation, J. Catal. 254 (2008).

DOI: 10.1016/j.jcat.2008.01.007

[4] S. Kannan, C.S. Swamy, Catalytic decomposition of nitrous oxide over calcined cobalt aluminum hydrotalcites, Catal. Today 53 (1999) 725−737.

DOI: 10.1016/s0920-5861(99)00159-5

[5] J.J. Wei, Z.J. Yang, H.X. Yang, T. Sun, Y.Z. Yang, A mild solution strategy for the synthesis of mesoporous CeO2 nanoflowers derived from Ce(HCOO)3, Crystengcomm 13 (2011) 4950−4955.

DOI: 10.1039/c1ce05324h

[6] D.P. Dutta, N. Manoj, A.K. Tyagi, White light emission from sonochemically synthesized rare earth doped ceria nanophosphors, J. Lumines. 131 (2011) 1807−1812.

DOI: 10.1016/j.jlumin.2011.04.017

[7] E. Moretti, L. Storaro, A. Talon, M. Lenarda, P. Riello, R. Frattini, M.V.M. de Yuso, A. Jimenez-Lopez, E. Rodriguez-Castellon, F. Ternero, A. Caballero, J.P. Holgado, Effect of thermal treatments on the catalytic behaviour in the CO preferential oxidation of a CuO-CeO2-ZrO2 catalyst with a flower-like morphology, Appl. Catal. B 102 (2011).

DOI: 10.1016/j.apcatb.2011.01.004

[8] J.P. Cheng, X. Chen, R. Ma, F. Liu, X.B. Zhang, A facile method to fabricate porous Co3O4 hierarchical microspheres, Mater. Charact. 62 (2011) 775−780.

DOI: 10.1016/j.matchar.2011.05.008

[9] M.K. Jia, G.J. Su, M.H. Zheng, B. Zhang, S.J. Lin, Development of Self-Assembled 3D Micro/Nano FexOy Materials for Application in Degradation of Hexachlorobenzene, J. Nanosci. Nanotechnol. 11 (2011) 2100−2106.

DOI: 10.1166/jnn.2011.3121

[10] L.S. Zhong, J.S. Hu, H.P. Liang, A.M. Cao, W.G. Song, L.J. Wan, Self-assembled 3D flowerlike iron oxide nanostructures and their application in water treatment, Adv Mater. 18 (2006) 2426−2431.

DOI: 10.1002/adma.200600504

[11] L.S. Zhong, J.S. Hu, A.M. Cao, Q. Liu, W. G. Song, L. J. Wan, 3D flowerlike Ceria micro/nanocomposite structure and its application for water treatment and CO removal, Chem. Mater. 19 (2007) 1648−1655.

DOI: 10.1021/cm062471b

[12] A.M. Cao, J.D. Monnell, C. Matranga, J.M. Wu, L.L. Cao, D. Gao, Hierarchical nanostructured copper oxide and its application in arsenic removal, J. Phys. Chem. C 111 (2007) 18624−18628.

DOI: 10.1021/jp0773379

[13] S.W. Bain, Z. Ma, Z.M. Cui, L.S. Zhang, F. Niu, W.G. Song, Synthesis of micrometer-sized nanostructured magnesium oxide and its high catalytic activity in the clainsen-schmidt condensation reaction, J. Phys. Chem. C 112 (2008) 11340−11344.

DOI: 10.1021/jp802863j

[14] S.J. Lin, G.J. Su, M.H. Zheng, M.K. Jia, C.S. Qi, W. Li, The degradation of 1, 2, 4- trichlorobenzene using synthesized Co3O4 and the hypothesized mechanism, J. Hazard. Mater. 192(2011)1697−1704.

DOI: 10.1016/j.jhazmat.2011.07.008

[15] S.J. Lin, G.J. Su, M.H. Zheng, D.K. Ji, M.K. Jia, Y.X. Liu, Synthesis of flower-like Co3O4–CeO2 composite oxide and its application to catalytic degradation of 1, 2, 4-trichlorobenzene, Appl. Catal. B: Environ. 123−124(2012)440−447.

DOI: 10.1016/j.apcatb.2012.05.011

[16] Y. Cheng, Y. S. Wang, Y.H. Zheng, Y. Qin, Two-step self-assembly of nanodisks into plate-built cylinders through oriented aggregation, J. Phys. Chem. B 109 (2005) 11548−11551.

DOI: 10.1021/jp050641m

[17] H. Cölfen, M. Antonietti, Mesocrystals: inorganic superstructures made by highly parallel crystallization and controlled alignment, Angew. Chem. Int. Ed. 44 (2005) 5576−5591.

DOI: 10.1002/anie.200500496

[18] D. Larcher, G. Sudant, R. Patrice, J.M. Tarascon, Some insights on the use of polyols-based metal alkoxides powders as precursors for tailored metal-oxides particles, Chem. Mater. 15(2003)3543−3551.

DOI: 10.1021/cm030048m