CoAl-LDH incorporated g-C3N4 nanosheets: a dual-function photocatalyst for hydrogen production and dye degradation

IF 2.6 4区 化学 Q3 CHEMISTRY, PHYSICAL
Ionics Pub Date : 2025-05-10 DOI:10.1007/s11581-025-06357-3
D. Madhan, V. Devabharathi, Suganthi Muthusamy, Thangabalu Subramani
{"title":"CoAl-LDH incorporated g-C3N4 nanosheets: a dual-function photocatalyst for hydrogen production and dye degradation","authors":"D. Madhan,&nbsp;V. Devabharathi,&nbsp;Suganthi Muthusamy,&nbsp;Thangabalu Subramani","doi":"10.1007/s11581-025-06357-3","DOIUrl":null,"url":null,"abstract":"<div><p>The construction of heterojunction nanostructures and the engineering of their morphology are regarded as significant strategies for enhancing photocatalytic performance. This study presents the preparation of a novel binary g-C<sub>3</sub>N<sub>4</sub>/@CoAl-LDH heterostructure photocatalyst, achieved through the hydrothermal synthesis interpret, which involved the loading of well-dispersed g-C<sub>3</sub>N<sub>4</sub> nanosheets onto the surface of the CoAl-layered double hydroxide (CoAl-LDH) precursor. The investigation of the samples encompassed an examination of their surface morphology, crystalline structure, and chemical state through the utilisation of scanning electron microscopy (SEM), X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The findings suggest a precisely calibrated band gap energy spanning from pure CoAl-LDH to pure CN. Furthermore, the significant attenuation of the photoluminescence signal and the extended lifetime of photogenerated charges, as evidenced by time-resolved photoluminescence spectra, underscore the exceptional photocatalytic performance of these composites. The as-prepared 15 mol% CoAl-LDH/CN exhibited a remarkable photocatalytic hydrogen evolution rate of 3377 µmol h<sup>−1</sup> g<sup>−1</sup>, which was seven times higher than that of pure CoAl-LDH (477 µmol h<sup>−1</sup> g<sup>−1</sup>). The enhanced activity could be mainly attributed to its unique structure and high surface area. Distinct from ordinary heterojunction photocatalysts, two-dimensional (2D) heterojunctions with abundant 2D coupling interfaces and strong interfacial interaction could efficiently suppress the recombination of photo-induced charge carriers and shorten charge transmission distance demonstrate an enhanced ability to effectively mitigate the recombination of photo-induced charge carriers while also reducing the distance required for charge communication. The sample was further monitored to degrade crystal violet (CV) under visible light. The highest photocatalytic efficiency was recorded for the 15 mol% CoAl-LDH/CN, which achieved 99% degradation efficiency and reaction rate constant (k) of 0.0871 min<sup>−1</sup>. Radical scavenging experiments showed that<sup><b>⋅</b></sup>OH, e<sup>−</sup>, and h<sup>+</sup> played significant roles in the degradation process.</p></div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 7","pages":"7177 - 7190"},"PeriodicalIF":2.6000,"publicationDate":"2025-05-10","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/s11581-025-06357-3","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

The construction of heterojunction nanostructures and the engineering of their morphology are regarded as significant strategies for enhancing photocatalytic performance. This study presents the preparation of a novel binary g-C3N4/@CoAl-LDH heterostructure photocatalyst, achieved through the hydrothermal synthesis interpret, which involved the loading of well-dispersed g-C3N4 nanosheets onto the surface of the CoAl-layered double hydroxide (CoAl-LDH) precursor. The investigation of the samples encompassed an examination of their surface morphology, crystalline structure, and chemical state through the utilisation of scanning electron microscopy (SEM), X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The findings suggest a precisely calibrated band gap energy spanning from pure CoAl-LDH to pure CN. Furthermore, the significant attenuation of the photoluminescence signal and the extended lifetime of photogenerated charges, as evidenced by time-resolved photoluminescence spectra, underscore the exceptional photocatalytic performance of these composites. The as-prepared 15 mol% CoAl-LDH/CN exhibited a remarkable photocatalytic hydrogen evolution rate of 3377 µmol h−1 g−1, which was seven times higher than that of pure CoAl-LDH (477 µmol h−1 g−1). The enhanced activity could be mainly attributed to its unique structure and high surface area. Distinct from ordinary heterojunction photocatalysts, two-dimensional (2D) heterojunctions with abundant 2D coupling interfaces and strong interfacial interaction could efficiently suppress the recombination of photo-induced charge carriers and shorten charge transmission distance demonstrate an enhanced ability to effectively mitigate the recombination of photo-induced charge carriers while also reducing the distance required for charge communication. The sample was further monitored to degrade crystal violet (CV) under visible light. The highest photocatalytic efficiency was recorded for the 15 mol% CoAl-LDH/CN, which achieved 99% degradation efficiency and reaction rate constant (k) of 0.0871 min−1. Radical scavenging experiments showed thatOH, e, and h+ played significant roles in the degradation process.

煤- ldh加入了g-C3N4纳米片:一种用于制氢和降解染料的双功能光催化剂
异质结纳米结构的构建及其形貌的工程化被认为是提高光催化性能的重要策略。本研究提出了一种新型二元g-C3N4/@CoAl-LDH异质结构光催化剂的制备方法,通过水热合成解释,将分散良好的g-C3N4纳米片加载到煤层双氢氧化物(CoAl-LDH)前驱体的表面。对样品的研究包括利用扫描电子显微镜(SEM)、x射线衍射、拉曼光谱和x射线光电子能谱(XPS)检查其表面形貌、晶体结构和化学状态。研究结果表明,可以精确校准从纯煤- ldh到纯CN的带隙能量。此外,光致发光信号的显著衰减和光生电荷的寿命延长,正如时间分辨光致发光光谱所证明的那样,强调了这些复合材料卓越的光催化性能。15 mol%煤- ldh /CN的光催化析氢速率为3377µmol h−1 g−1,是纯煤- ldh(477µmol h−1 g−1)的7倍。活性的增强主要归因于其独特的结构和较高的比表面积。与普通的异质结光催化剂不同,具有丰富的二维耦合界面和强界面相互作用的二维异质结可以有效地抑制光诱导载流子的复合,缩短电荷传输距离,从而增强了有效抑制光诱导载流子复合的能力,同时也减少了电荷通信所需的距离。进一步监测样品在可见光下对结晶紫(CV)的降解。15 mol%的煤- ldh /CN的光催化效率最高,达到99%的降解效率,反应速率常数(k)为0.0871 min−1。自由基清除实验表明,⋅OH、e−和h+在降解过程中起重要作用。
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
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.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信