Enhancement of photocatalytic efficiency of copper oxide/zinc oxide-montmorillonite photocatalyst under visible light irradiation.

IF 7.4 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science and Technology of Advanced Materials Pub Date : 2025-02-21 eCollection Date: 2025-01-01 DOI:10.1080/14686996.2025.2469484

Chomponoot Suppaso, Nipaporn Pongkan, Sonchai Intachai, Wachiraya Rattanawongsa, Areebhorn Baoulan, Yusuke Yamauchi, Yusuke Asakura, Nithima Khaorapapong

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引用次数: 0

Abstract

The formation of copper oxide and zinc oxide mixture in montmorillonite was conducted by the reaction of an aqueous dispersion of Cu²⁺/Zn²⁺ exchanged montmorillonite and an aqueous solution of sodium hydroxide under hydrothermal treatment. The resulting product was characterized by X-ray diffraction, scanning and transmittance electron microscopies, as well as UV-visible and photoluminescence spectroscopies. The diffuse reflectance absorption spectra showed the absorption onsets due to copper oxide (885 nm) and zinc oxide (310 and 580 nm) in the product. The adsorption of methylene blue was fitted well by the Langmuir model with the maximum adsorption capacity of 454 mg⋅g^-1. The thermodynamic studies revealed that the process is exothermic and spontaneous. The photocatalytic activity of the hybrid was assessed by the degradation of methylene blue in aqueous solution under visible light irradiation. The most active species in the photocatalytic process was hydroxyl radicals. The regenerated copper oxide/zinc oxide-montmorillonite was reused up to 5 cycles, the photodegradation efficiency dropped only 5% (from 94% to 89%), supporting the good stability of the photocatalyst. The result was in agreement with the advantages of the nanocomposite heterostructure and the unique nature of montmorillonite.

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可见光下氧化铜/氧化锌-蒙脱土光催化剂光催化效率的提高。

在水热作用下，用Cu2+/Zn2+交换蒙脱土的水分散体与氢氧化钠水溶液反应，在蒙脱土中生成氧化铜和氧化锌混合物。通过x射线衍射、扫描电镜、透射电镜以及紫外可见光谱和光致发光光谱对产物进行了表征。漫反射吸收光谱显示产物中氧化铜（885 nm）和氧化锌（310 nm和580 nm）的吸收开始。对亚甲基蓝的吸附符合Langmuir模型，最大吸附量为454 mg⋅g-1。热力学研究表明，该过程是自发的放热过程。通过在可见光照射下对水溶液中亚甲基蓝的降解，考察了该杂化物的光催化活性。光催化过程中最活跃的物质是羟基自由基。再生后的氧化铜/氧化锌-蒙脱土重复使用5次，光降解效率仅下降5%（从94%降至89%），支持了光催化剂良好的稳定性。结果与纳米复合异质结构的优点和蒙脱土的独特性质相吻合。

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

Science and Technology of Advanced Materials 工程技术-材料科学：综合

CiteScore

10.60

自引率

3.60%

发文量

审稿时长

4.8 months

期刊介绍： Science and Technology of Advanced Materials (STAM) is a leading open access, international journal for outstanding research articles across all aspects of materials science. Our audience is the international community across the disciplines of materials science, physics, chemistry, biology as well as engineering. The journal covers a broad spectrum of topics including functional and structural materials, synthesis and processing, theoretical analyses, characterization and properties of materials. Emphasis is placed on the interdisciplinary nature of materials science and issues at the forefront of the field, such as energy and environmental issues, as well as medical and bioengineering applications. Of particular interest are research papers on the following topics: Materials informatics and materials genomics Materials for 3D printing and additive manufacturing Nanostructured/nanoscale materials and nanodevices Bio-inspired, biomedical, and biological materials; nanomedicine, and novel technologies for clinical and medical applications Materials for energy and environment, next-generation photovoltaics, and green technologies Advanced structural materials, materials for extreme conditions.