增强压电光催化 ZnO-MoS2 异质结构的染料降解能力

IF 2.2 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Electronic Materials Pub Date : 2024-09-06 DOI:10.1007/s11664-024-11413-1
James Albert B. Narvaez, Candy C. Mercado
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引用次数: 0

摘要

光催化是一种降解有害化合物的新方法,经常用于环境修复,如消除废水中的甲基橙(MO)染料。然而,由于光催化剂的带隙较大且重组率较高,可见光的使用效率较低,从而限制了光催化过程。为了解决这一问题,人们利用压电光电技术来提高催化降解的效率。本研究利用太阳能和机械能实现了 ZnO-MoS2 异质结构在降解 MO 染料时的压光催化效率。研究人员通过两步水热法合成了平均长度为 3.34 μm、平均直径为 872.6 nm 的一维异质结构,这些异质结构紧密排列在玻璃基底上。在模拟太阳光照射和超声波振动下,ZnO-MoS2 能有效降解 MO,通过在 ZnO 中引入压电势,降解效率从 55% 提高到 84%。超声通过场辅助分离光生电子和空穴,减少了重组,从而有助于光催化。耦合液相色谱法和质谱法证实了 MO 被降解为更小的代谢物。即使重复使用 3 次,催化剂薄膜的降解率也达到了 61%。
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Enhancement of Dye Degradation in Piezo-Photocatalytic ZnO–MoS2 Heterostructures

Photocatalysis is a novel approach to degrade hazardous compounds, frequently employed in environmental remediation such as eliminating methyl orange (MO) dye from wastewater. However, low efficient usage of visible light due to the large band gap of photocatalysts and its high rate of recombination limit the process. To address this issue, piezophototronics has been utilized to improve the efficacy of catalytic degradation. Specifically for this study, the piezo-photocatalytic efficiency of ZnO–MoS2 heterostructures has been realized using solar and mechanical energy in degrading MO dye. One-dimensional heterostructures with an average length of 3.34 μm and an average diameter of 872.6 nm compactly aligned on glass substrates were synthesized through a two-step hydrothermal process. Under simulated solar illumination and ultrasonic vibration, the ZnO–MoS2 effectively degraded MO, improving the degradation efficiency from 55% to 84% by introducing piezopotential in ZnO. Ultrasonication aided the photocatalysis through field-assisted separation of the photogenerated electrons and holes, reducing recombination. Coupled liquid chromatography and mass spectrometry confirmed the degradation of MO into its smaller metabolites. The catalyst films have achieved 61% degradation even after 3 times reuse.

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来源期刊
Journal of Electronic Materials
Journal of Electronic Materials 工程技术-材料科学:综合
CiteScore
4.10
自引率
4.80%
发文量
693
审稿时长
3.8 months
期刊介绍: The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications. Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field. A journal of The Minerals, Metals & Materials Society.
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