As a new type of catalytic material, colloidal nickel catalyst has some special properties in catalytic activity and selectivity.

This paper studies the preparation of colloidal nickel and explores the effect of preparation conditions on catalytic hydrogenation of Cinnamaldehyde.

Nano-NiCu ferrite particles were manufactured by the sol-gel method.

The results of experiments indicate that both of these two kinds of compound ferrite have some microwave absorption property and nano-NiCu ferrite is better than nano-MnZn ferrite in the microwave absorption properties.

Ti3+ was employed as shielding effect agent to prepare stabilized dispersed copper colloid by disproportionating reaction of Cu+.

01 percent of total copper can effectively prevent the copper colloid from oxidation.

This paper studies the methods and reaction conditions for the preparation of colloidal copper catalysts without N_2 protection.

Colloidal copper particles were prepared by reducing copper(Ⅱ) chloride solution with the mixed solution of hydrazine hydrate and sodium hydroxide in the presence of stabilizer polyvinyl pyrrolidone(PVP).