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为了研究氧化石墨烯在萘氧化过程中的作用,构建了萘-叔丁基过氧化氢(TBHP)-氧化石墨烯的催化氧化体系。考察了氧化石墨烯种类、溶剂种类、氧化剂含量、石墨烯用量、反应温度、反应时间对萘氧化反应的影响。结果表明,氧化石墨烯的引入可以提高萘的转化率和1,4-萘醌的收率;当萘用量为100 mg,叔丁基过氧化氢为2.4 m L,氧化石墨烯为20 mg且n(O)/n(C)=0.10,以乙酸为反应溶剂,在100℃反应22 h,萘的转化率达到29.05%,苯酐和1,4-萘醌的选择性之和为92.34%,收率分别为18.48%和8.34%。在此基础上,初步探讨了氧化石墨烯对萘氧化的作用机理。
In order to study the role of graphene oxide in naphthalene oxidation, a catalytic oxidation system of naphthalene-tert-butyl hydroperoxide (TBHP) -granyl oxide was constructed. The effects of graphene oxide type, solvent type, oxidant content, graphene dosage, reaction temperature and reaction time on the oxidation of naphthalene were investigated. The results show that the introduction of graphene oxide can improve the conversion of naphthalene and the yield of 1,4-naphthoquinone. When the dosage of naphthalene is 100 mg, the concentration of t-butyl hydroperoxide is 2.4 m L, the content of graphene oxide is 20 mg n (O) / n (C) = 0.10. The conversion of naphthalene reached 29.05% with acetic acid as the reaction solvent at 100 ℃ for 22 h. The selectivity to phthalic anhydride and 1,4-naphthoquinone was 92.34% The yields were 18.48% and 8.34% respectively. On this basis, the mechanism of the oxidation of naphthalene by graphene oxide was preliminary discussed.