关键词: 化学液相还原, 零价铁纳米颗粒, 水合肼, 多元醇, 碱金属硼氢化物

Abstract: Zerovalent iron nanoparticles (ZVINs) have attracted much attention for their excellent magnetic properties and great potential in many practical applications. This review summarizes the details of synthesizing ZVINs by chemical reduction of iron salts in aqueous solution. ZVINs are easy to agglomerate and oxidize，which makes them difficult to prepare，study，and utilize. Agglomeration of ZVINs can be largely inhibited by stabilizing them with various dispersing agents and oxidation of ZVINs can be minimized by coating them with different shells. In the chemical solution reduction process，three kinds of reducing agents of hydrazine hydrate and polyols and alkali metal borohydrides with different reduction performance are often used to synthesize ZVINs. The advantages and disadvantages of these reducing agents for synthesizing ZVINs are discussed. Further developments of the chemical solution reduction process，to a great extent，depend on the insight into the behavior of dispersing agents and coated shells，on the industrial scale-up of the chemical reduction process，and on the low-cost preparation of ZVINs.

Key words: chemical solution reduction, zerovalent iron nanoparticle, hydrazine hydrate, polyol, alkali metal borohydride