Laser-initiated chemical reactions in carbon suspensions
Laser-initiated chemical reactions in carbon suspensions
复制标题
DOI：
10.1021/jp0208135
复制
发表时间：
2002-10-31
影响因子：
2.9
通讯作者：
Crowell, RA
中科院分区：
文献类型：
--
作者：
McGrath, TE;Diebold, GJ;Crowell, RA
我们报道了在胶体碳悬浮液中激光引发的化学反应。用高功率纳秒、皮秒和费罗秒激光脉冲照射悬浮在水、甲苯和苯中的直径为13至75 nm的碳颗粒，可形成许多气态碳氢化合物以及一系列液相产物。在上述辐照后的产物气体中，碳-蒸汽反应的主要反应产物H-2和CO以及C-1-C-4等多种碳氢化合物被检测到。在甲苯和苯中辐照颗粒碳，主要生成H-2和少量的C-1-C-3烃。甲苯悬浮液和苯悬浮液的主要液体产物分别为联苯和联苯，但存在大量浓度较小的多环芳烃。脉冲激光辐照产生的产物的数量取决于颗粒的大小和浓度，以及激光的能量和脉冲宽度。所报道的化学反应发生在以极高温和极短持续时间的压力为特征的条件下。
We report on laser-initiated chemical reactions in colloidal carbon suspensions. Irradiation of carbon particles ranging in size from 13 to 75 nm in diameter suspended in water, toluene, and benzene with high power nanosecond, picosecond, and feratosecond laser pulses leads to the formation of a number of gaseous hydrocarbons as well as a series of liquid-phase products. In the product gas above irradiated carbon suspensions in water, H-2 and CO, the main reaction products of the carbon-steam reaction, and numerous hydrocarbons ranging from C-1-C-4 were detected. Irradiation of particulate carbon in toluene and benzene gave H-2 as the main gas product with small amounts Of C-1-C-3 hydrocarbons. Bibenzyl and biphenyl were found as the main liquid products produced in toluene and benzene suspensions, respectively, but with numerous polycyclic aromatic hydrocarbons in smaller concentrations. The amount of products generated by pulsed laser irradiation is shown to depend on particle size and concentration, as well as the laser fluence and pulse width. The chemical reactions reported take place under conditions characterized by extremely high temperatures and pressures of short duration.