利用快速燃烧法合成的钛掺杂氧化锌纳米颗粒增强亚甲基蓝的光催化降解
Enhanced Photocatalytic Degradation of Methylene Blue Using Ti-Doped ZnO Nanoparticles Synthesized by Rapid Combustion.
作者信息
Wongrerkdee Sutthipoj, Wongrerkdee Sawitree, Boonruang Chatdanai, Sujinnapram Supphadate
机构信息
Department of Physics, Faculty of Liberal Arts and Science, Kasetsart University Kamphaeng Saen Campus, Kamphaeng Saen, Nakhon Pathom 73140, Thailand.
Faculty of Engineering, Rajamangala University of Technology Lanna Tak, Muang, Tak 63000, Thailand.
出版信息
Toxics. 2022 Dec 29;11(1):33. doi: 10.3390/toxics11010033.
ZnO and Ti-doped ZnO (Ti-ZnO) nanoparticles were synthesized using rapid combustion. The morphology of ZnO and Ti-ZnO featured nanoparticles within cluster-like structures. The ZnO and Ti-ZnO structures exhibited similar hexagonal wurtzite structures and crystal sizes. This behavior occurred because Zn sites of the ZnO lattice were substituted by Ti ions. The chemical structure characterization implied the major vibration of the ZnO structure. The physisorption analysis showed similar mesoporous and non-rigid aggregation structures for ZnO and Ti-ZnO using N adsorption-desorption. However, Ti-ZnO demonstrated a specific surface area two times higher than that of ZnO. This was a major factor in improving the photocatalytic degradation of methylene blue (MB). The photocatalytic degradation analysis showed a kinetic degradation rate constant of 2.54 × 10 min for Ti-ZnO, which was almost 80% higher than that of ZnO (1.40 × 10 min). The transformation mechanism of MB molecules into other products, including carbon dioxide, aldehyde, and sulfate ions, was also examined.
采用快速燃烧法合成了氧化锌（ZnO）和钛掺杂氧化锌（Ti-ZnO）纳米颗粒。ZnO和Ti-ZnO的形态以簇状结构内的纳米颗粒为特征。ZnO和Ti-ZnO结构呈现出相似的六方纤锌矿结构和晶体尺寸。出现这种现象是因为ZnO晶格中的Zn位点被Ti离子取代。化学结构表征表明了ZnO结构的主要振动。物理吸附分析表明，使用N吸附-脱附法，ZnO和Ti-ZnO具有相似的介孔和非刚性聚集结构。然而，Ti-ZnO的比表面积是ZnO的两倍。这是提高亚甲基蓝（MB）光催化降解性能的一个主要因素。光催化降解分析表明，Ti-ZnO的动力学降解速率常数为2.54×10⁻³ min⁻¹，几乎比ZnO（1.40×10⁻³ min⁻¹）高80%。还研究了MB分子转化为其他产物（包括二氧化碳、醛和硫酸根离子）的转化机制。
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