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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Sonoluminescence of Na atom from NaCl solutions doped with ethanol
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Sonoluminescence of Na atom from NaCl solutions doped with ethanol

机译：乙醇掺杂的NaCl溶液中Na原子的声致发光

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Sonoluminescence spectra from argon-saturated NaCl solution were measured in the concentration range of 0.5-4 M at the frequency of 138 kHz. The line broadening of sodium atom emission was observed at various acoustic powers in the range from 1.8 to 16.2 W. The sodium D line showed a maximum intensity at a NaCl concentration of 2 M, which corresponded to the maximum production of OH radicals estimated by KI dosimetry. The effects of the addition of a small amount of ethanol on the line width and intensity were closely investigated at various acoustic powers. The sodium line width increases with ethanol concentration and also with power, whereas the line intensity is strongly quenched with increasing ethanol concentration. The results conclusively show that the sodium emission occurs in the gas phase within bubbles. The line broadening is due to interactions with high-pressure argon, and the maximum relative density of gas at bubble collapse was estimated to be 59.5 from the comparison with spectroscopic data. Further line broadening and quenching upon the addition of ethanol arise from collisions with gaseous products obtained from the decomposition of ethanol. The mechanism of sodium excitation is inferred to be as follows. Sodium ions enter bubbles as droplets, and salts are formed because of the high temperature within bubbles. Sodium atoms are generated by the dissociation of salts and then undergo electronic excitation by OH and H radicals.
机译：在138 kHz的频率下，在0.5-4 M的浓度范围内测量了氩饱和NaCl溶液的声致发光光谱。在1.8至16.2 W范围内的各种声功率下，观察到钠原子发射的谱线展宽。钠D谱线在2M的NaCl浓度下显示出最大强度，这对应于KI估计的最大的OH自由基产生。剂量学。在各种声功率下，都仔细研究了添加少量乙醇对线宽和强度的影响。钠线宽度随乙醇浓度和功率而增加，而线强度随乙醇浓度增加而强烈淬灭。结果最终表明钠的释放发生在气泡内的气相中。该线变宽是由于与高压氩气的相互作用所致，根据与光谱数据的比较，气泡破裂时气体的最大相对密度估计为59.5。与乙醇分解产生的气态产物的碰撞会导致添加乙醇时进一步的加宽和猝灭。钠激发的机理推测如下。钠离子以小滴形式进入气泡，并且由于气泡中的高温而形成盐。钠原子通过盐的离解生成，然后通过OH和H自由基进行电子激发。

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