A Novel Sm2O3 / MWCNT Nanocomposite as a Photocatalytic Application Against Orange G and Hydroquinone Pollutants

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-05-13 DOI:10.1007/s10562-025-05034-4

A. Kistan, G. Raja, R. Venkatesh, A. S. Prakaash

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Abstract

By using a solvothermal preparation process, a multi-walled carbon nanotube photocatalyst (Sm₂O₃/MWCNT) was synthesises, which improved the photocatalytic efficiency of samarium oxide (Sm₂O₃) and revealed its catalytic mechanism. The crystalline phase and morphological structure of Sm₂O₃/MWCNTs were observed using X-ray powder diffraction spectroscopy (XRD), Raman spectra, Field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). X-ray photoelectron spectroscopy (XPS) revealed that the modification by MWCNTs resulted in modifications in functional groups on the surface and a binding energy shift of Sm and O. The catalytic performance of Sm₂O₃/MWCNT was enhanced in all of the characterisations. The Sm₂O₃/MWCNT-catalysed degradation routes of Orange G and Hydroquinone dyes were investigated as the target trace persistent pollutant. Throughout the end, preliminary studies were conducted to ascertain the extent to which pH, catalyst dosage, beginning dye concentration, and electrolytes affected catalyst efficiency in the process of dye degradation. Research on the reusability of the catalyst showed that it retained its original efficiency even after the third cycle of reuse.

Graphical Abstract

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新型Sm2O3 / MWCNT纳米复合材料对橙G和对苯二酚污染物的光催化作用

采用溶剂热法制备多壁碳纳米管光催化剂（Sm2O3/MWCNT），提高了氧化钐（Sm2O3）的光催化效率，揭示了其催化机理。采用x射线粉末衍射光谱（XRD）、拉曼光谱（Raman）、场发射扫描电镜（FE-SEM）和透射电镜（TEM）观察了Sm2O3/MWCNTs的晶相和形态结构。x射线光电子能谱（XPS）显示，MWCNTs修饰导致了表面官能团的修饰，Sm和o的结合能发生了转移，Sm2O3/MWCNT的催化性能在所有表征中都得到了增强。研究了Sm2O3/ mwcnt催化降解橙G和对苯二酚染料作为目标痕量持久性污染物的途径。在整个过程中，我们进行了初步研究，以确定pH、催化剂用量、起始染料浓度和电解质对染料降解过程中催化剂效率的影响程度。对该催化剂的可重复使用性进行了研究，结果表明，该催化剂在重复使用三次后仍能保持原有的效率。图形抽象

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.