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首页> 外文期刊>Nanotechnology >Rapid mineralization of methyl orange by nanocrystalline-assembled mesoporous Cu2O microspheres
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Rapid mineralization of methyl orange by nanocrystalline-assembled mesoporous Cu2O microspheres

机译：通过纳米晶组装的介孔Cu2O微球快速矿化甲基橙

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In this study, nanocrystalline-assembled mesoporous Cu2O microspheres (MCMs) with enhanced visible-light driven photocatalytic activity were synthesized by a facile one-step hydrothermal method. MCMs exhibit excellent visible-light driven photocatalytic activity with 85% removal of methyl orange (MO) (60% removal of total organic carbon (TOC)) in 40 min. The excellent photocatalytic performance is dependent on the specific morphology and excellent visible-light absorption ability. Interestingly, MCMs can efficiently remove MO with or without light. The amount and categories of active species were determined by electron paramagnetic resonance and photoluminance (PL). Reactive oxygen species (ROS) (mainly center dot O-2(-) and H2O2) and Cu (I) radicals are important in fading and further mineralization of MO. With the assistance of gas chromatography-mass spectrometer, TOC and x-ray photoelectron spectroscopy, the degradation pathways in light and dark conditions were analyzed. It has been proven that MO could be efficiently mineralized by ROS generated in light, while reaction in dark condition was more likely to be an efficient fading process.
机译：在该研究中，通过容易的一步水热法合成了具有增强的可见光驱动光催化活性的纳米晶组装的介孔Cu2O微球（MCM）。 MCMS表现出优异的可见光驱动光催化活性，85％除去甲基橙（Mo）（60％的总机碳（TOC））在40分钟内。优异的光催化性能取决于具体的形态和优异的可见光吸收能力。有趣的是，MCM可以有效地删除mo，无论有无光。有源物种的量和类别由电子顺磁共振和光孔（PL）确定。活性氧（ROS）（主要是中央点O-2（ - ）和H2O2）和Cu（I）基团在褪色和进一步的Mo矿化方面是重要的。随着气相色谱 - 质谱仪，TOC和X射线光电子能谱的辅助，分析了光和暗条件下的降解途径。已经证明，MO可以通过光产生的ROS有效地矿化，而在暗状态中的反应更可能是有效的衰落过程。

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