Multiscale Investigation and Mechanistic Insights into TiO2@CoAl-LDH-Modified Asphalt for the Photocatalytic Degradation of NOx

IF 4.4 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2026-10-20 Epub Date: 2026-10-08 DOI:10.1021/acs.langmuir.6c03522

Canlin Zhang, Peng Jin, Ting Wang, Minxuan Chen, Zhengyang Fang, Zenghua Sun, Peng Xia

{"title":"Multiscale Investigation and Mechanistic Insights into TiO2@CoAl-LDH-Modified Asphalt for the Photocatalytic Degradation of NOx","authors":"Canlin Zhang, Peng Jin, Ting Wang, Minxuan Chen, Zhengyang Fang, Zenghua Sun, Peng Xia","doi":"10.1021/acs.langmuir.6c03522","DOIUrl":null,"url":null,"abstract":"For the eco-friendly asphalt pavements with NOx degradation performance, TiO2@CoAl-LDHs\r\nwere prepared\r\nand applied as asphalt modifiers. X-ray diffraction (XRD) and X-ray\r\nphotoelectron spectroscopy (XPS) indicated that TiO2 was\r\nuniformly loaded onto the surface of the CoAl-LDHs, and TiO2@CoAl-LDHs have been successfully synthesized. The integration of\r\nTiO2 and CoAl-LDHs reduced the energy barrier for electron–hole\r\npair formation upon light irradiation, resulting in the stronger absorbance\r\nof TiO2@CoAl-LDHs in both ultraviolet and visible light\r\nranges. After combining TiO2 with CoAl-LDHs, the photogenerated\r\nelectron transfer and separation efficiency of TiO2@CoAl-LDHs\r\nwere significantly enhanced, and the recombination of electron–hole\r\npairs was concomitantly suppressed. Compared with TiO2 and\r\nCoAl-LDHs, TiO2@CoAl-LDH-modified asphalt exhibited stronger\r\ninteraction with NOx. Meanwhile, NOx diffused more easily and had a larger penetration\r\nproportion in TiO2@CoAl-LDH-modified asphalt. All of these\r\ncontributed to better NOx photocatalytic\r\ndegradation capability of TiO2@CoAl-LDH-modified asphalt.\r\nThis study promotes the development of eco-friendly asphalt pavements.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"42 41","pages":"30663–30675"},"PeriodicalIF":4.4000,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Langmuir","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.langmuir.6c03522","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/10/8 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

For the eco-friendly asphalt pavements with NO_x degradation performance, TiO₂@CoAl-LDHs were prepared and applied as asphalt modifiers. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) indicated that TiO₂ was uniformly loaded onto the surface of the CoAl-LDHs, and TiO₂@CoAl-LDHs have been successfully synthesized. The integration of TiO₂ and CoAl-LDHs reduced the energy barrier for electron–hole pair formation upon light irradiation, resulting in the stronger absorbance of TiO₂@CoAl-LDHs in both ultraviolet and visible light ranges. After combining TiO₂ with CoAl-LDHs, the photogenerated electron transfer and separation efficiency of TiO₂@CoAl-LDHs were significantly enhanced, and the recombination of electron–hole pairs was concomitantly suppressed. Compared with TiO₂ and CoAl-LDHs, TiO₂@CoAl-LDH-modified asphalt exhibited stronger interaction with NO_x. Meanwhile, NO_x diffused more easily and had a larger penetration proportion in TiO₂@CoAl-LDH-modified asphalt. All of these contributed to better NO_x photocatalytic degradation capability of TiO₂@CoAl-LDH-modified asphalt. This study promotes the development of eco-friendly asphalt pavements.

查看原文本刊更多论文

TiO2@CoAl-LDH-Modified沥青光催化降解NOx的多尺度研究和机理见解

摘要为制备具有NOx降解性能的环保型沥青路面，制备了TiO2@CoAl-LDHs作为沥青改性剂并应用于路面。x射线衍射（XRD）和x射线光电子能谱（XPS）结果表明，TiO2均匀地负载在煤- ldhs表面，并成功合成了TiO2@CoAl-LDHs。TiO2与煤- ldhs的结合降低了光照射下电子-空穴对形成的能垒，使得TiO2@CoAl-LDHs在紫外和可见光范围内的吸光度都更强。TiO2与CoAl-LDHs结合后，TiO2@CoAl-LDHs的光生电子转移和分离效率显著提高，同时抑制了电子-空穴对的复合。与TiO2和CoAl-LDHs相比，TiO2@CoAl-LDH-modified沥青与NOx的相互作用更强。同时，NOx在TiO2@CoAl-LDH-modified沥青中更容易扩散，渗透比例更大。这些都有助于TiO2@CoAl-LDH-modified沥青具有较好的NOx光催化降解能力。本研究促进了环保沥青路面的发展。

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

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).