Mn-doped ZnO nanopowders prepared by sol-gel and microwave-assisted sol-gel methods and their photocatalytic properties.

IF 2.6 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Beilstein Journal of Nanotechnology Pub Date : 2024-10-28 eCollection Date: 2024-01-01 DOI:10.3762/bjnano.15.104
Cristina Maria Vlăduț, Crina Anastasescu, Silviu Preda, Oana Catalina Mocioiu, Simona Petrescu, Jeanina Pandele-Cusu, Dana Culita, Veronica Bratan, Ioan Balint, Maria Zaharescu
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Abstract

Although the microwave-assisted sol-gel method is quite frequently used for the preparation of oxide nanostructures, the synergism of the reaction pathways is not fully explained. However, state-of-the-art theoretical and practical results of high novelty can be achieved by continuously evaluating the as-synthesized materials. The present paper presents a comparative study of Mn-doped ZnO nanopowders prepared by both sol-gel and microwave-assisted sol-gel methods. The structural, morphological, and optical properties of the as-obtained powders were established and correlated with their newly proved functionality, namely, the ability to photogenerate distinct reactive oxygen species (·OH or O2 -) and to act as photoactive materials in aqueous media. The solar light-induced mineralization of oxalic acid by Mn-doped ZnO materials was clearly observed while similar amounts of generated CO2 were measured for both catalysts. These inexpensive semiconductor materials, which proved to be light-responsive, can be further used for developing water depollution technologies based on solar light energy.

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溶胶-凝胶法和微波辅助溶胶-凝胶法制备的掺锰氧化锌纳米粉体及其光催化性能。
尽管微波辅助溶胶-凝胶法常用于制备氧化物纳米结构,但其反应途径的协同作用尚未得到充分解释。然而,通过对合成材料的不断评估,可以获得具有高度新颖性的最新理论和实践成果。本文比较研究了溶胶-凝胶法和微波辅助溶胶-凝胶法制备的掺锰氧化锌纳米粉体。研究确定了所获粉末的结构、形态和光学特性,并将其与新证明的功能(即在水介质中能够光生成不同的活性氧(-OH 或 O2-)并作为光活性材料)相关联。我们清楚地观察到掺锰氧化锌材料在太阳光诱导下对草酸的矿化作用,同时测量到两种催化剂产生的二氧化碳量相似。事实证明,这些价格低廉的半导体材料具有光响应性,可进一步用于开发基于太阳光能的水污染技术。
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来源期刊
Beilstein Journal of Nanotechnology
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.
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