Intermixing of MoS₂ and WS₂ photocatalysts toward methylene blue photodegradation.

IF 2.6 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Beilstein Journal of Nanotechnology Pub Date : 2024-07-05 eCollection Date: 2024-01-01 DOI:10.3762/bjnano.15.68

Maryam Al Qaydi, Nitul S Rajput, Michael Lejeune, Abdellatif Bouchalkha, Mimoun El Marssi, Steevy Cordette, Chaouki Kasmi, Mustapha Jouiad

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引用次数: 0

Abstract

Visible-light-driven photocatalysis using layered materials has garnered increasing attention regarding the degradation of organic dyes. Herein, transition-metal dichalcogenides MoS₂ and WS₂ prepared by chemical vapor deposition as well as their intermixing are evaluated for photodegradation (PD) of methylene blue under solar simulator irradiation. Our findings revealed that WS₂ exhibited the highest PD efficiency of 67.6% and achieved an impressive PD rate constant of 6.1 × 10^-3 min^-1. Conversely, MoS₂ displayed a somewhat lower PD performance of 43.5% but demonstrated remarkable stability. The intriguing result of this study relies on the synergetic effect observed when both MoS₂ and WS₂ are combined in a ratio of 20% of MoS₂ and 80% of WS₂. This precise blend resulted in an optimized PD efficiency and exceptional stability reaching 97% upon several cycles. This finding underscores the advantageous outcomes of intermixing WS₂ and MoS₂, shedding light on the development of an efficient and enduring photocatalyst for visible-light-driven photodegradation of methylene blue.

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将 MoS2 和 WS2 光催化剂混合用于亚甲基蓝的光降解。

利用层状材料的可见光驱动光催化技术降解有机染料的研究越来越受到关注。在此，我们评估了通过化学气相沉积法制备的过渡金属二卤化物 MoS2 和 WS2 以及它们的混合物在太阳模拟器照射下对亚甲基蓝的光降解（PD）效果。我们的研究结果表明，WS2 的光降解效率最高，达到 67.6%，光降解速率常数为 6.1 × 10-3 min-1。相反，MoS2 的光致脱色性能稍低，仅为 43.5%，但却表现出显著的稳定性。本研究令人感兴趣的结果是，当 MoS2 和 WS2 以 20% 的 MoS2 和 80% 的 WS2 的比例混合时，观察到了协同效应。这种精确的混合带来了优化的 PD 效率和卓越的稳定性，在多次循环后达到 97%。这一发现强调了 WS2 和 MoS2 混合使用的优势，为开发一种高效、持久的光催化剂提供了启示，该催化剂可用于可见光驱动的亚甲基蓝光降解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Beilstein Journal of Nanotechnology NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.70

自引率

3.20%

发文量

109

审稿时长

2 months

期刊介绍： The Beilstein Journal of Nanotechnology is an international, peer-reviewed, Open Access journal. It provides a unique platform for rapid publication without any charges (free for author and reader) – Platinum Open Access. The content is freely accessible 365 days a year to any user worldwide. Articles are available online immediately upon publication and are publicly archived in all major repositories. In addition, it provides a platform for publishing thematic issues (theme-based collections of articles) on topical issues in nanoscience and nanotechnology. The journal is published and completely funded by the Beilstein-Institut, a non-profit foundation located in Frankfurt am Main, Germany. The editor-in-chief is Professor Thomas Schimmel – Karlsruhe Institute of Technology. He is supported by more than 20 associate editors who are responsible for a particular subject area within the scope of the journal.