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对分析纯试剂液体石蜡、苯、甲苯、二甲苯、苯酚、萘、四氢萘、十氢萘等分别进行光催化氧化,反应混合物分离后进行GC-MS分析鉴定。结果表明,光催化氧化产生的自由基是氧化反应发生的动力;支链烷烃的氧化易于正构烷烃;活性氢和给电子基团的存在更有利于正构烷烃或苯环芳烃的解聚;并非光照时间越长就会得到更好的效果,长时间的光辐射可能导致解聚的中间产物重新交联、反应成分更加复杂不利于分离;随着光催化氧化反应的进行,溶液的极性增强,更有利于光解聚反应的进行;稠环芳环化合物较单环化合物更易发生光催化氧化而开环。
The analytical reagent liquid paraffin, benzene, toluene, xylene, phenol, naphthalene, tetrahydronaphthalene, decahydronaphthalene were photocatalyzed oxidation, the reaction mixture was separated and identified by GC-MS analysis. The results showed that the radical generated by photocatalytic oxidation was the driving force for the oxidation reaction. The branched alkanes were easily oxidized to normal paraffins. The presence of active hydrogen and electron donating groups was more favorable for depolymerization of n-paraffins or aromatic hydrocarbons. The longer the light irradiation may lead to the re-crosslinking of the depolymerized intermediate product, the reaction component is more complicated and not conducive to separation; as the photocatalytic oxidation reaction progresses, the polarity of the solution Enhanced, more conducive to the photodecomposition reaction; condensed ring aromatic compounds are more susceptible to monocyclic compounds photocatalytic oxidation and ring opening.