非热等离子体和ZnO纳米颗粒对有机染料降解的协同效应

IF 2.5 4区 综合性期刊 Q2 CHEMISTRY, MULTIDISCIPLINARY
E. Abdel-Fattah, S. Alotibi
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引用次数: 0

摘要

研究了非热等离子体和ZnO纳米粒子对亚甲基蓝降解效率的协同效应。首先,采用水热法制备ZnO纳米颗粒;扫描电镜(SEM)观察到纳米颗粒直径为30 ~ 50 nm, x射线衍射(XRD)和拉曼光谱(Raman spectroscopy)证实了纳米颗粒具有六边形ZnO晶格结构。x射线光发射光谱证实了ZnO的组成和氧空位的存在;光学带隙能量为3.17 eV。等离子体辐射的光学发射证实了各种活性等离子体的存在。其次,发现单独在等离子体中,MB在60 min后的最大降解效率为85%,当与0.2 gL−1 ZnO结合时,降解效率提高到95%;但当ZnO负载增加到0.4 gL−1时,这一比例下降到75%。这些结果清楚地表明,将等离子体与适量的ZnO结合是一种很有前途的高级氧化技术,因为它提供了额外的羟基自由基来源,同时也提供了可以激发ZnO催化剂的光子来源。介绍了等离子体单独降解和等离子体与氧化锌复合降解氧化锌的机理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synergistic Effect of Nonthermal Plasma and ZnO Nanoparticles on Organic Dye Degradation
The synergetic effect of nonthermal plasma and ZnO nanoparticles (NPs) on the degradation efficiency of methylene blue was investigated. First, the ZnO nanoparticles were synthesized via the hydrothermal route; the spherical nanoparticles had diameters of 30–50 nm, as observed with a scanning electron microscope (SEM), and had hexagonal ZnO lattice structures, which was confirmed by both X-ray diffraction (XRD) and Raman spectroscopy. The X-ray-photoemission spectroscopy confirmed the ZnO composition and the presence of oxygen vacancies; meanwhile, the optical band gap energy was 3.17 eV. The optical emission of plasma radiation confirmed the presence of various active plasma species. Second, it was found that the maximum degradation efficiency of MB after 60 min was 85% in plasma alone and increased to 95% when combined with 0.2 gL−1 ZnO; but this decreased to 75% when ZnO loading increased to 0.4 gL−1. These results clearly show that combining plasma with the right amount of ZnO is a promising advanced oxidation technique as it provides an additional source of hydroxyl radicals and, at the same time, a source of photons that can excite the ZnO catalyst. The degradation mechanism for plasma alone and the plasma in combination with ZnO was presented.
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来源期刊
Applied Sciences-Basel
Applied Sciences-Basel CHEMISTRY, MULTIDISCIPLINARYMATERIALS SCIE-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
5.30
自引率
11.10%
发文量
10882
期刊介绍: Applied Sciences (ISSN 2076-3417) provides an advanced forum on all aspects of applied natural sciences. It publishes reviews, research papers and communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files and software regarding the full details of the calculation or experimental procedure, if unable to be published in a normal way, can be deposited as supplementary electronic material.
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