Synthesis of Cu2O nanowire mesocrystals using PTCDA as a modifier and their superior peroxidase-like activity
Synthesis of Cu2O nanowire mesocrystals using PTCDA as a modifier and their superior peroxidase-like activity
复制标题
以PTCDA为修饰剂合成Cu2O纳米线介晶及其优异的类过氧化物酶活性
DOI：
10.1007/s10853-015-9716-3
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发表时间：
2016
影响因子：
4.5
通讯作者：
Fan Hai Ming
中科院分区：
文献类型：
--
作者：
Li Ga Long;Ma Pei;Zhang Yi Fan;Liu Xiao Li;Zhang Huan;Xue Wei Ming;Mi Yu;Luo Yan E.;Fan Hai Ming
Cu2O纳米线介晶(NWMCs)具有良好的八面体形态和各向异性互穿纳米线的高孔率结构，由于其优异的物理化学性质而引起了人们的广泛关注。然而，目前以氧化石墨烯为改性剂的Cu2O纳米复合材料的合成方法存在产物不可控、产率低(~30%)的问题，这在很大程度上阻碍了其工业化应用。在本论文中，我们报道了一种改进的合成方法，该方法可以控制并规模化地制备Cu2O纳米WMCs。系统地研究了生长时间和初始pH对最终产物形貌的影响。在最佳反应条件下，初始pH为5.3，反应时间为15h，可以得到产率高达75%左右的八面体Cu2O纳米WMCs。此外，这种合成方法可以很容易地从50毫升高压灭菌器扩大到500毫升。纳米Cu2O纳米复合材料的高产量和重复性使我们能够通过催化邻苯二胺在过氧化氢存在下的氧化来进一步研究它们的类过氧化物酶活性。Cu2O纳米WMC表现出较好的催化活性，K_(Cat)为1.14×10~(-2)−~2，是辣根过氧化物酶的10倍。此外，经过10批次氧化还原反应后，Cu2O NWMCs的初始活性仍能保持69.5%。我们的研究结果为利用均相分子修饰剂可控大规模合成Cu2O纳米WMCs提供了一条简便的途径，并为将Cu2O NWMCs作为纳米酶应用于未来的工业应用提供了机会。
Cu2O nanowire mesocrystals (NWMCs), which possess well-defined octahedral morphology and high-porosity architecture with anisotropic interpenetrating nanowires, have attracted considerable attention owing to their superior physical and chemical properties. However, the current synthetic approach for Cu2O NWMCs using graphene oxide as modifier leads to uncontrollable products and low productivity (~30 %), which largely hinder their further industrial application. Herein, we report a modified synthetic approach for controllable and large-scale preparation of Cu2O NWMCs using perylene-3,4,9,10-tetracarboxylic dianhydride molecule as modifier. The effects of growth time and initial pH on the morphology of final products have been systemically investigated. Under the optimal reaction condition with initial pH of 5.3 and reaction time of 15 h, the well-defined octahedral Cu2O NWMCs can be obtained with a productivity as high as ~75 %. In addition, this synthetic approach can be easily scaled up from 50 to 500 mL autoclave. The ability of high productivity and reproducibility in synthesis of Cu2O NWMCs enable us to further study their peroxidase-like activity by catalyzing the oxidation ofo-phenylenediamine in the presence of H2O2. The Cu2O NWMCs have exhibited a superior catalytic activity with theKcatof 1.14 × 10−2, 10 times higher than that of horseradish peroxidase. Moreover, the Cu2O NWMCs can also retain 69.5 % of their initial activities after 10-batch redox reactions. Our results provide a facile approach to controllable and large-scale synthesis of Cu2O NWMCs using homogeneous molecule modifier and open up opportunities to use Cu2O NWMCs as nanozyme for future industrial application.