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Ag3PW12O40/C3N4 nanocomposites as an efficient photocatalyst for hydrocarbon selective oxidation

机译:Ag3PW12O40 / C3N4纳米复合材料作为烃选择性氧化的有效光催化剂

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Ag _(3) PW _(12) O _(40) /C _(3) N _(4) nanocomposites were successfully synthesized by loading Ag _(3) PW _(12) O _(40) into C _(3) N _(4) , in which case Ag _(3) PW _(12) O _(40) is gained through reaction between AgNO _(3) and H _(3) PW _(12) O _(40) at room temperature. The obtained nanocomposites show efficient and light-operated catalytic activity for hydrocarbon selective oxidation (selective oxidation of cyclooctene and cyclohexane) without adding any oxidant at 60 °C. For cyclooctene, the conversion based on cyclooctene is 41.26%, and the selectivity of selective oxidation to epoxycyclooctane can be up to 77.2%. The nanocomposite catalyst yielded oxidation of cyclohexane to cyclohexanone with 8.62% efficiency and >99.0% selectivity. In the catalytic system, the oxidant (H _(2) O _(2) ) in the catalysis process can be produced by the irradiation of C _(3) N _(4) and then decomposed into HO· with the help of Ag _(3) PW _(12) O _(40) . The observed improvement in the activities of photo-induced oxidation of cyclooctene and cyclohexane is mainly attributed to the high BET surface area of C _(3) N _(4) . With the synergistic effect of Ag _(3) PW _(12) O _(40) and C _(3) N _(4) , the nanocomposite displays considerable catalytic activity, which sheds light on the catalyst design applied in the selective oxidation of hydrocarbon.
机译:Ag _(3)PW _(12)o _(40)/ c _(3)n _(4)纳米复合材料通过加载Ag _(3)PW _(12)O _(40)成C _ (3)N _(4),在这种情况下,通过AGNO _(3)和H _(3)PW _(12)O _之间的反应来获得AG _(3)PW _(12)O _(40)。 (40)在室温下。所得纳米复合材料显示出用于烃选择性氧化(环庚烯和环己烷的选择性氧化)的有效和光照催化活性,而不在60℃下加入任何氧化剂。对于环辛烯,基于环辛烯的转化率为41.26%,选择性氧化对环氧环辛烷的选择性高达77.2%。纳米复合催化剂将环己烷的氧化产生至环己酮,效率为8.62%,选择性为99.0%。在催化系统中,催化过程中的氧化剂(H _(2)O _(2))可以通过C _(3)N _(4)的照射来产生,然后在HO·借助于AG _(3)PW _(12)O _(40)。观察到的环辛烯和环己烷的光诱导氧化活性的改进主要归因于C _(3)N _(4)的高BET表面积。具有Ag _(3)PW _(12)o o _(40)和C _(3)N _(4)的协同作用,纳米复合材料显示相当大的催化活性,其揭示在选择性中施加的催化剂设计烃的氧化。

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