锌纳米颗粒的制备及其应用

在干法室温条件下,以锌粉为原材料,通过滚压振动研磨法制备锌纳米颗粒,经过表征发现研磨11h后的锌纳米颗粒,分散性好,粒度均匀。将该锌纳米颗粒应用到制氢过程中,以氩气为载气携带水蒸气进入反应器,与预热的锌纳米颗粒接触,发生水解反应,生成氢气和氧化锌纳米结构。利用气相色谱仪检测可知,氢气的生成速率最高可达184mL/min。利用能量发射谱图和透射电镜检测可知,固体产物为棒状和块状混合的氧化锌纳米结构,在可见光区有着优异的吸光特性,尤其在波长大于400nm的范围内,吸收因子明显高于商业纳米氢化锌和锌纳米颗粒。

Preparation of Zn Nano-particles and Application in Hydrogen Production

The Zn nano-particles prepared by vibration mill were used as one reactant, then let Ar carried the other reactant-water vapour in while the Zn nano-particles was heated. Once the vapour contacted with heated Zn nano-particles, the water-splitting reaction started, hydrogen yielded and solid zinc oxide nanostructures gained. The hydrogen yield rate was tested by GC, finally the solid production was detected by EDS and TEM. It proved that the Zn nano-particles milled for 11 h acted well while contacted with water vapor, and the hydrogen yield rate could reach to a high level of 184 mL/min. TEM images showed a great dispersivity featuring nano-rods intermixed with nano-flakes. These zinc oxide hybrid nano-structures showed a great absorbency comparing with bought ZnO nano-particles and milled Zn nano-particles, especially in visible light with the wave length over 400 nm。