Impact of Multiwall Carbon Nanotubes on Photocatalytic Response of Cadmium Oxide Nanocomposites for Water Pollutants

IF 2.8 4区化学 Q3 CHEMISTRY, PHYSICAL

Electrocatalysis Pub Date : 2025-03-15 DOI:10.1007/s12678-025-00942-w

Suchitra Manjhu, Anu Malhotra, Sonia Srivastava, Anju Lavania, Karishma Jain, Deepika Maan, S. K. Jain, Shalini Dixit, Balram Tripathi

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Abstract

In this study, we are reporting photocatalytic response of multiwall carbon nanotubes (MWCNTs)/cadmium oxide (CdO) nanocomposites. We dispersed MWCNT (1–5 wt%) into CdO system via sonication to obtain MWCNT/CdO nanocomposites. The methylene blue (MB) dye has been used as a photocatalytic probe to study response of degradation with respect to contact reaction time, effect of pH, temperature, and concentration of MWCNT into the CdO system. The optimum values are acquired at pH value of 6 and temperature range 50–60 °C for all composition of the catalysts. The intrinsic characteristics of resulting composites have been studied by X-ray diffraction, scanning electron microscopy, FT-IR analysis, and photoluminescence spectroscopy. It has been found that the as-prepared MWCNT/CdO nanocomposites possess dye absorptivity of 97.85%, significantly higher than the 64.85% observed for pristine CdO at a contact time of 75 min. Additionally, these nanocomposites exhibited an extended light absorption range and improved charge separation efficiency. The photodegradation of methylene blue shows significant enhancement in the reaction rate which reaches up to 0.058 min⁻¹ for the MWCNT/CdO composites, compared to 0.0189 min⁻¹ for the pristine CdO system.

Graphical Abstract

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多壁碳纳米管对氧化镉纳米复合材料对水污染物光催化反应的影响

在这项研究中，我们报道了多壁碳纳米管(MWCNTs)/氧化镉（CdO）纳米复合材料的光催化反应。我们通过超声波将MWCNT （1-5 wt%）分散到CdO体系中，得到MWCNT/CdO纳米复合材料。以亚甲基蓝（MB）染料作为光催化探针，研究了接触反应时间、pH、温度和MWCNT加入CdO体系的浓度对降解的影响。在pH值为6、温度范围为50 ~ 60℃时，各组分催化剂的最佳配比均达到最佳。用x射线衍射、扫描电镜、红外光谱和光致发光光谱等方法研究了复合材料的内在特性。结果表明，MWCNT/CdO纳米复合材料在接触75 min时的染料吸收率为97.85%，明显高于原始CdO的64.85%。此外，这些纳米复合材料具有更大的光吸收范围和更高的电荷分离效率。MWCNT/CdO复合材料对亚甲基蓝的光降解反应速度有显著的提高，与原始CdO系统的反应速度0.0189分钟相比较，MWCNT/CdO复合材料的反应速度可达0.058分钟⁻1。图形抽象

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来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

审稿时长

>12 weeks

期刊介绍： Electrocatalysis is cross-disciplinary in nature, and attracts the interest of chemists, physicists, biochemists, surface and materials scientists, and engineers. Electrocatalysis provides the unique international forum solely dedicated to the exchange of novel ideas in electrocatalysis for academic, government, and industrial researchers. Quick publication of new results, concepts, and inventions made involving Electrocatalysis stimulates scientific discoveries and breakthroughs, promotes the scientific and engineering concepts that are critical to the development of novel electrochemical technologies. Electrocatalysis publishes original submissions in the form of letters, research papers, review articles, book reviews, and educational papers. Letters are preliminary reports that communicate new and important findings. Regular research papers are complete reports of new results, and their analysis and discussion. Review articles critically and constructively examine development in areas of electrocatalysis that are of broad interest and importance. Educational papers discuss important concepts whose understanding is vital to advances in theoretical and experimental aspects of electrochemical reactions.