利用机械化学法合成了单相ZnO粉体,XRD分析结果表明,ZnSO4/NaOH(mol比)在1/2.1～1/3.0之间均可合成ZnO粒子,ZnO产率在ZnSO4/NaOH为1/2.5时最大,TEM分析表明,ZnO粒子的粒径在40～80nm范围,对于反应机理,认为是固-固反应中放出的大量的热,使Zn(OH)2直接转化为ZnO粒子,光吸收性能表明,纳米ZnO粉体的紫外吸收性能(200～400nm)较普通ZnO粉体强得多。
ZnO nanoparticles were synthesized by the mechanochemical processing. XRD patterns indicate all products are
single ZnO phase while ZnSO4/NaOH(mol ratio)is in the range from 1/2.1 to 1/3.0, and ZnO yield will obtain the maximum when ZnSO4/NaOH(mol ratio) is 1/2.5. TEM micrographs show the particle size of ZnO is about 40～80nm.
The heat released by the solid-solid reaction of ZnSO_4 and NaOH makes the product of Zn(OH)2 tramsform directly to ZnO particles. The optical
absorptivity of ultraviolet (200～400nm) for nanometer ZnO is much better than that of normal ZnO powders.
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