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Citation: CAI Haokun, ZHANG Jian, LU Ping, LEI Kewei, DONG Jian. Polymer Microgel-Supported Ni Catalysts and Their Catalytic Reduction of Aromatic Nitro Compounds[J]. Chinese Journal of Applied Chemistry, ;2015, 32(8): 892-899. doi: 10.11944/j.issn.1000-0518.2015.08.140456 shu

Polymer Microgel-Supported Ni Catalysts and Their Catalytic Reduction of Aromatic Nitro Compounds

CAI Haokun ^a,b ,
ZHANG Jian ^b ,
LU Ping ^b ,
LEI Kewei ^a ,
DONG Jian ^b,,

1.
a School of Material Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315211, China;
2.
b School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang 312000, China

Corresponding author: DONG Jian,
Received Date: 31 December 2014
Available Online: 27 March 2015
Fund Project: 浙江省科技厅基金资助项目(2012C24003) (2012C24003)浙江省自然科学基金项目(LY12E03001) (LY12E03001)

Polymer microgel-supported Ni particles were prepared by impregnation first with a small amount of Ni seeds on microgels,then by electroless nickel plating on the seeded microgels.The nickel particles exhibit good catalytic activity in hydrogen transfer reactions of aromatic nitro compounds with hydrazine hydrate as the hydrogen donor.Dynamic light scattering characterization shows that Ni embedded gel particles have hydrodynamic diameters of approximately 411.9 nm.Results from high resolution transmission electron microscopy and X-ray photoelectron spectroscopy demonstrate that Ni is mainly in the form of NiO.The effect of the hydrazine hydrate amount on the reaction was examined for the reduction of nitrobenzene.The result show that a molar ratio of 1:15 for the substrate to hydrazine hydrate is optimal for the reduction.The optimized conditions are used for reduction of a series of aromatic nitro compounds,giving rise to high yields of aromatic amines.Kinetic analysis shows that the Arrhenius activation energy is 133.7 k J/mol,the enthalpy is130.9 k J/mol,and the entropy is 102.8 J/(mol·K).
- polymer microgel,
- nickel,
- hydrazine hydrate,
- aromatic nitro compounds,
- catalysis
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