Eco-efficient synthesis of cerium oxide nanoparticles via combustion method: enhanced their photocatalytic, and electrochemical properties

IF 2.6 4区化学 Q3 CHEMISTRY, PHYSICAL

Ionics Pub Date : 2025-07-16 DOI:10.1007/s11581-025-06514-8

Thejaswini M., Lakshmi Ranganatha V., Pramila S., Sangamesha M. A., Nagaraju G., Shivaganga G. S., Sharath Chandra N., Mallikarjunaswamy C.

{"title":"Eco-efficient synthesis of cerium oxide nanoparticles via combustion method: enhanced their photocatalytic, and electrochemical properties","authors":"Thejaswini M., Lakshmi Ranganatha V., Pramila S., Sangamesha M. A., Nagaraju G., Shivaganga G. S., Sharath Chandra N., Mallikarjunaswamy C.","doi":"10.1007/s11581-025-06514-8","DOIUrl":null,"url":null,"abstract":"<div>This study explores the enhancement of methylene blue (MB) dye degradation by using cerium oxide nanoparticles (CeO2 NPs) that have been green synthesized, with Cleome gynandra seed extract acting as natural reducing and stabilizing agents. Green synthesis provides a sustainable and environmentally friendly alternative to conventional methods for producing CeO2 NPs, thereby decreasing harmful environmental impacts. To enhance their performance in dye degradation and electrochemical applications, the synthesized NPs were further optimized. The X-ray diffraction (XRD) pattern indicated the face-centered cubic structure of CeO2-NPs, which had a crystallite size of around 34.12 nm. The scanning electron microscopy (SEM) studies revealed the spherical form of CeO2 nanoparticles. The UV–Visible spectroscopy revealed a band gap of 3.2 eV, which is suitable for absorption in the UV region. The bio-synthesized CeO2-NPs demonstrated a superior photocatalytic decolorization efficiency by exhibiting 94% methylene blue (MB) dye degradation efficiency after exposure to UV light at 180 min. Further, the reusability experiment reveals better photostability of CeO2 NPs. Additionally, the cyclic voltammetry (CV) analysis of the CeO2 demonstrated remarkable bio-analyte sensing abilities by presenting significant oxidation and reduction peaks towards paracetamol sensing. Electrochemical impedance spectroscopy (EIS) presented significant findings into the ionic conductivity of a material and the capacitive performance of the CeO2-modified electrode.</div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 9","pages":"9551 - 9566"},"PeriodicalIF":2.6000,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ionics","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s11581-025-06514-8","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

This study explores the enhancement of methylene blue (MB) dye degradation by using cerium oxide nanoparticles (CeO₂ NPs) that have been green synthesized, with Cleome gynandra seed extract acting as natural reducing and stabilizing agents. Green synthesis provides a sustainable and environmentally friendly alternative to conventional methods for producing CeO₂ NPs, thereby decreasing harmful environmental impacts. To enhance their performance in dye degradation and electrochemical applications, the synthesized NPs were further optimized. The X-ray diffraction (XRD) pattern indicated the face-centered cubic structure of CeO₂-NPs, which had a crystallite size of around 34.12 nm. The scanning electron microscopy (SEM) studies revealed the spherical form of CeO₂ nanoparticles. The UV–Visible spectroscopy revealed a band gap of 3.2 eV, which is suitable for absorption in the UV region. The bio-synthesized CeO₂-NPs demonstrated a superior photocatalytic decolorization efficiency by exhibiting 94% methylene blue (MB) dye degradation efficiency after exposure to UV light at 180 min. Further, the reusability experiment reveals better photostability of CeO₂ NPs. Additionally, the cyclic voltammetry (CV) analysis of the CeO₂ demonstrated remarkable bio-analyte sensing abilities by presenting significant oxidation and reduction peaks towards paracetamol sensing. Electrochemical impedance spectroscopy (EIS) presented significant findings into the ionic conductivity of a material and the capacitive performance of the CeO₂-modified electrode.

查看原文本刊更多论文

燃烧法制备生态高效的氧化铈纳米颗粒：增强其光催化和电化学性能

本研究探讨了利用绿色合成的氧化铈纳米颗粒（CeO2 NPs）增强亚甲基蓝（MB）染料的降解，并以金缕梅种子提取物作为天然还原剂和稳定剂。绿色合成提供了一种可持续和环境友好的替代方法来生产CeO2 NPs，从而减少了对环境的有害影响。为了提高合成的NPs在染料降解和电化学应用中的性能，对其进行了进一步优化。x射线衍射（XRD）图谱显示CeO2-NPs为面心立方结构，晶粒尺寸约为34.12 nm。扫描电镜（SEM）研究表明，CeO2纳米颗粒呈球形。紫外可见光谱显示其带隙为3.2 eV，适合在紫外区吸收。生物合成的CeO2-NPs在紫外线照射180 min后，对亚甲基蓝（MB）染料的降解率达到94%，表现出优异的光催化脱色效率。此外，可重用性实验表明CeO2 NPs具有较好的光稳定性。此外，循环伏安法（CV）分析表明，CeO2具有显著的生物分析物感应能力，对扑热息痛有明显的氧化和还原峰感应。电化学阻抗谱（EIS）对材料的离子电导率和ceo2修饰电极的电容性能有重要的发现。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Ionics 化学-电化学

CiteScore

5.30

自引率

7.10%

发文量

427

审稿时长

2.2 months

期刊介绍： Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.