Entezari M H, Kruus P, Otson R
Ottawa-Carleton Chemistry Institute, Department of Chemistry, Carleton University, Ontario, Canada.
Ultrason Sonochem. 1997 Jan;4(1):49-54. doi: 10.1016/s1350-4177(96)00016-8.
Investigations were made of the effects of frequency, temperature, intensity and gases on the rate of sonochemical dissociation of carbon disulfide. Application of 900 kHz ultrasound did not produce any noticeable change. When carbon disulfide was irradiated with 20 kHz, the liquid formed a heterogeneous mixture of black particles in a yellow solution. The rate of dissociation decreased with increasing temperature, in agreement with most sonochemical reactions. The rate also decreased with decreasing area of the horn tip, keeping total power constant. This dependence on the horn tip area, as well as that on the frequency, is in opposition to the dependence for the formation of iodine from the sonication of aqueous potassium iodide solution [See Part II, Ultrasonics Sonochemistry 3 (1996) 19]. The X-ray spectrum of the black particles and the yellow residue obtained after evaporation showed the presence of amorphous carbon and monoclinic sulfur. The rate of sono-dissociation of carbon disulfide in the presence of different gases is in the order He > H2 > Air > Ar > O2 > CO2.
研究了频率、温度、强度和气体对二硫化碳声化学解离速率的影响。施加900kHz超声未产生任何明显变化。用20kHz照射二硫化碳时，液体在黄色溶液中形成黑色颗粒的非均相混合物。与大多数声化学反应一致，解离速率随温度升高而降低。在总功率恒定的情况下，速率也随变幅杆尖端面积减小而降低。这种对变幅杆尖端面积以及频率的依赖性与碘化钾水溶液超声处理生成碘的依赖性相反[见第二部分，《超声化学》3(1996)19]。黑色颗粒的X射线光谱以及蒸发后得到的黄色残渣表明存在无定形碳和单斜硫。在不同气体存在下二硫化碳的声解离速率顺序为：氦＞氢＞空气＞氩＞氧＞二氧化碳。
