粒度變化機(jī)制
(中南大學(xué) 化學(xué)化工學(xué)院，長(zhǎng)沙 410083)
摘 要: 在超聲波作用下，利用氧化鋅粉和硫化鈉溶液反應(yīng)制備納米硫化鋅，對(duì)該方法制備納米ZnS顆粒的粒度變化機(jī)制開展研究。結(jié)果表明，ZnS粒度隨著反應(yīng)溫度的提高及液固比的增加逐漸增大；隨反應(yīng)時(shí)間的延長(zhǎng)，先增大后減小；隨Na2S摩爾濃度的增加而減小；隨超聲波的加入，顆粒粒度顯著變小，并且能夠達(dá)到納米量級(jí)；沒(méi)有超聲波作用所形成的ZnS顆粒只能達(dá)到微米量級(jí)。
關(guān)鍵字: 氧化鋅；納米硫化鋅；結(jié)晶；超聲波
（School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China）
Abstract:Nanoparticles ZnS were prepared with ZnO and Na2S by solid-liquid chemical reaction under ultrasonic condition. Mechanism of the particle size change of nanoparticles ZnS was investigated. The results show that the particle size of ZnS gradually augments along with the increase of the reaction temperature and liquid-to-solid ratio; while with the increase of the reaction time, it augments at first and then reduces; and reduces with the increase of the molar concentration of Na2S. Under the addition of ultrasound, the particle size of ZnS decreases significantly and can achieve the nanometer magnitude.
Key words: ZnO; ZnS nanoparticles; crystal; supersonic wave
