Co-reporter:Hai Zhu, Gan Li, Quan Chi, Yanxi Zhao, Hanfan Liu, Jinlin Li and Tao Huang
CrystEngComm 2012 vol. 14(Issue 5) pp:1531-1533
Publication Date(Web):10 Jan 2012
DOI:10.1039/C2CE06247J
Well-defined tetrapod/Mitsubishi-like Pd nanocrystals with uniform dimensions were successfully synthesized by using Pd(acac)2 as a precursor and CO as a reducing agent in the presence of sodium acetate. Carboxylate anions such as acetate anions played an essential role in controlling the tetrapod morphologies of the final products.
Co-reporter:Hai Zhu, Quan Chi, Yanxi Zhao, Chunya Li, Heqing Tang, Jinlin Li, Tao Huang, Hanfan Liu
Materials Research Bulletin 2012 47(11) pp: 3637-3643
Publication Date(Web):
DOI:10.1016/j.materresbull.2012.06.048
Co-reporter:Yanchun Yu, Yanxi Zhao, Tao Huang, Hanfan Liu
Materials Research Bulletin 2010 45(2) pp: 159-164
Publication Date(Web):
DOI:10.1016/j.materresbull.2009.09.028
Co-reporter:Xia Tong, Yanxi Zhao, Tao Huang, Hanfan Liu, Kong Yong Liew
Applied Surface Science 2009 Volume 255(Issue 23) pp:9463-9468
Publication Date(Web):15 September 2009
DOI:10.1016/j.apsusc.2009.07.059
Abstract
Pd nanoparticles with uniform, self-assembled pompon-like nanostructure were synthesized by thermal decomposition of palladium acetate under microwave irradiation with methyl isobutyl ketone (MIBK) as a solvent in the presence of a little amount of ethylene glycol (EG) and KOH without using any special stabilizers. The as-synthesized Pd nano-pompons were characterized by transmission electron microscopy, X-ray photoelectron spectroscopy and X-ray powder diffraction. The results show that the as-prepared Pd nano-pompons with the average diameters in the range of 28–81 nm were self-assemblies organized by hundreds of smaller primary nanoparticles with an average dimension of about 2.4 nm. The sizes of Pd nano-pompons can be well controlled by adjusting the concentration of palladium acetate. A little amount of EG and KOH also plays an important role in controlling the size, uniformity and dispersion of Pd nano-pompons. The Pd nano-pompons can be easily supported on γ-Al2O3 and their catalytic activity was examined preliminarily.
Co-reporter:Yixian Chen, Baolin He, Tao Huang, Hanfan Liu
Colloids and Surfaces A: Physicochemical and Engineering Aspects 2009 Volume 348(1–3) pp:145-150
Publication Date(Web):20 September 2009
DOI:10.1016/j.colsurfa.2009.07.007
The controlled synthesis of Pd icosahedra in tetraethylene glycol with H2PdCl4 as a precursor and polyvinylpyrrolidone (PVP) as a stabilizer was demonstrated. Tetraethylene glycol served as both solvent and reducing agent, and uniform Pd icosahedra with a mean size of 45 ± 5 nm were successfully synthesized with a high yield of over 90% in oil-bath at 160 °C for 2.5 h. A certain affinity for the metal particles, a higher viscosity and a milder reducing power of tetraethylene glycol would be responsible for the formation of uniform and stable Pd icosahedra with a high yield. The optimum KOH/Pd(II) ratio, PVP/Pd(II) ratio, temperature, and heating time for the reaction system was 1.4/1, 1/1, 160 °C, and 2.5 h, respectively.
Co-reporter:Wei Xu, Kong Yong Liew, Hanfan Liu, Tao Huang, Chuntao Sun, Yanxi Zhao
Materials Letters 2008 Volume 62(17–18) pp:2571-2573
Publication Date(Web):30 June 2008
DOI:10.1016/j.matlet.2007.12.057
Nickel nanoparticles with uniform, monomorphic self-assembled flower-like microstructure were synthesized by reduction of nickel chloride with hydrazine hydrate in the presence of polyvinylpyrrolidone (PVP) in ethylene glycol under microwave irradiation. An appropriate amount of Na2CO3 was necessary for the formation of monomorphic and uniform Ni nanoflowers. Small amount of NaOH and a higher concentration of hydrazine were beneficial to the formation of Ni nanoflowers with a smaller diameter and a narrower distribution. The transmission electron microscopy (TEM) and X-ray diffraction measurements manifested that the as-synthesized Ni nanoflower was the assembles self-organized by hundreds of smaller primary nanoparticles with an average dimension of about 6.3 nm.
