(中南大學(xué) 化學(xué)化工學(xué)院，長沙 410083)
摘 要: 以氧化鋅和硫化鈉為原料，采用固液化學(xué)反應(yīng)，在超聲波的作用下，制備納米硫化鋅。實驗得出最佳反應(yīng)條件為：反應(yīng)溫度80 ℃，Na2S濃度2.0 mol/L，反應(yīng)時間2 h，反應(yīng)前超聲分散15 min。對最佳條件下得到的納米硫化鋅顆粒進(jìn)行X射線衍射、掃描電鏡、紅外光譜及熱重−微分熱重分析。結(jié)果表明：該顆粒為結(jié)晶完全的閃鋅礦，平均粒度為50 nm，且顆粒在400~4 000 cm−1具有紅外透光性，在純氧氣氛圍中具有良好的熱穩(wěn)定性。
關(guān)鍵字: 超聲波；氧化鋅；納米硫化鋅；晶體
（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. The optimum conditions gained from experiment are as follows: reacting temperature 80 ℃, Na2S concentration 2.0 mol/L, reacting time 2 h, and dispersing with ultrasonic 15 min before reaction. The nanoparticles ZnS obtained by the optimum conditions were characterized by X-ray diffractometry (XRD), scan electron microscopy (SEM), infrared(IR) and thermogravimetry−differential thermogravimetry (TG-DTG). The results show that these particles are good crystal zinc blende with average size of 50 nm, and these particles also possess good IR transmittance in the range from 400 to 4 000 cm−1 and good thermal stability in oxygen.
Key words: ultrasonic; ZnO; nano-ZnS; crystal
