Ning Xueer, Hao Aize, Cao Yali, Hu Jindou, Xie Jing, Jia Dianzeng
Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region, Institute of Applied Chemistry, Xinjiang University, Urumqi, Xinjiang 830046, China.
Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region, Institute of Applied Chemistry, Xinjiang University, Urumqi, Xinjiang 830046, China.
J Colloid Interface Sci. 2020 Oct 1;577:290-299. doi: 10.1016/j.jcis.2020.05.082. Epub 2020 May 23.
The piezoelectric zinc oxides with different morphology (ZnO nanoparticles and nanorods, hereafter abbreviated as ZnO NPs and NRs) are successfully synthesized using facile, green and harmless solid-state chemistry method at room temperature. The piezocatalytic activity of zinc oxide towards methylene blue (MB) of organic pollutants degradation has been explored under ultrasonic vibration. The ZnO NRs exhibit effectively enhanced piezocatalytic performance towards degradation dye compared with the ZnO NPs. In particular, the piezocatalytic decolorization ratio of MB solution is up to ~38% in ZnO NRs under 120 min, ~ 99% under 5.5 h and show good recycling utilization characteristics, indicating great potential for dye wastewater decolorization treatment. The main oxidizing hydroxyl radical (OH) and superoxide radicals (O) of the piezocatalytic reactions are confirmed and the production of piezocatalytic degradation process induced polarization electric charges. Moreover, we investigate the relationship between morphology and piezoelectric potential based on the finite element method for ZnO NPs and NRs, which further clarify the enhanced piezocatalytic activity and insight into piezocatalytic mechanism. This work offers a novel strategy towards wastewater decontamination applications and further understanding the relationship between piezocatalysis, morphology, and piezocatalytic mechanism in piezoelectric materials.
采用简便、绿色且无害的室温固态化学方法成功合成了具有不同形貌的压电氧化锌（氧化锌纳米颗粒和纳米棒，以下简称为ZnO NPs和NRs）。在超声振动下研究了氧化锌对有机污染物亚甲基蓝（MB）降解的压电催化活性。与ZnO NPs相比，ZnO NRs对染料降解表现出有效增强的压电催化性能。特别是，在ZnO NRs中，MB溶液在120分钟内的压电催化脱色率高达约38%，在5.5小时内高达约99%，并显示出良好的循环利用特性，表明其在染料废水脱色处理方面具有巨大潜力。确定了压电催化反应的主要氧化羟基自由基（OH）和超氧自由基（O）以及压电催化降解过程中感应极化电荷的产生。此外，我们基于有限元方法研究了ZnO NPs和NRs的形貌与压电势之间的关系，这进一步阐明了增强的压电催化活性并深入了解了压电催化机理。这项工作为废水净化应用以及进一步理解压电材料中的压电催化、形貌和压电催化机理之间的关系提供了一种新策略。
Zotero 插件