Ultrafine MnO₂ nanoparticles decorated on graphene oxide as a highly efficient and recyclable catalyst for aerobic oxidation of benzyl alcohol

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• 作者：Zonggao Hu^a ; Yafei Zhao^a ; Jindun Liu^a ; Jingtao Wang^a ; Bing Zhang^a ; ^{zhangb@zzu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Xu Xiang^b ; ^{xiangxu@mail.buct.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：MnO2 ; Graphene oxide ; Heterogeneous catalyst ; Selective aerobic oxidation ; Benzyl alcohol
• 刊名：Journal of Colloid and Interface Science
• 出版年：2016
• 出版时间：1 December 2016
• 年：2016
• 卷：483
• 期：Complete
• 页码：26-33
• 全文大小：2833 K

文摘

The highly active and selective aerobic oxidation of aromatic alcohols over earth-abundant, inexpensive and recyclable catalysts is highly desirable. We fabricated herein MnO₂/graphene oxide (GO) composites by a facile in-situ growth approach at room temperature and used them in selective aerobic oxidation of benzyl alcohol to benzaldehyde. TEM, XRD, FTIR, XPS and N₂ adsorption/desorption analysis were employed to systematically investigate the morphology, particle size, structure and surface properties of the catalysts. The 96.8% benzyl alcohol conversion and 100% benzaldehyde selectivity over the MnO₂/GO (10/100) catalyst with well dispersive ultrafine MnO₂ nanoparticles (ca. 3 nm) can be obtained within 3 h under 383 K. Simultaneously, no appreciable loss of activity and selectivity occurred after recycling use up to six times. Due to their significant low cost, excellent catalytic performance, the MnO₂/GO composites have huge application prospect in organic synthesis.