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A Study on Modified Bitumen with Metal Doped Nano-TiO2 Pillared Montmorillonite
Open accessAbstract
TiO2 pillared montmorillonite (T/M) modifiers have been studied to alleviate the aging of asphalt pavement and degrade automobile exhaust, but the photocatalytic activity of ordinary TiO2 is not good enough. In this study, in order to improve the photocatalytic performance of T/M, different metal (Ce, Cu, Fe) doped modifiers were prepared based on T/M. Metal doped TiO2 pillared montmorillonite was prepared by the sol-gel method. The modifier was characterized by X-ray diffraction (XRD) and an Ultraviolet visible (UV-Vis) spectrophotometer. The results show that TiO2 with different metal ions successfully entered into the layer of organic montmorillonite (OMMT) to form a pillared structure. Compared with the undoped TiO2 pillared montmorillonite (T/M), the optical absorption edge of the metal doped TiO2 pillared montmorillonite has an obvious red shift. In addition, the influences of the different content of modifiers on the properties of the original bitumen and catalytic capacities for automobile exhaust were also investigated. The results show that Ce doped TiO2 (Ce-T/M) pillared montmorillonite has the best improvement in high temperature performance and ultraviolet (UV) resistance of bitumen. In the experiment of automobile exhaust degradation, the degradation law of NO and HC showed Cu-T/M > Ce-T/M > Fe-T/M > T/M. These three kinds of metal ions can effectively improve the photocatalytic degradation efficiency of T/M.
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“It may cause failure of the hot mix asphalt layers due to the infiltration of water in the pavement structure. This can cause a loss of stiffness, durability, and strength [41,42].”
From Nanoparticles in Construction Materials and Other Applications, and Implications of Nanoparticle Use (2019) · cites this paper as [42]
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Metadata
- Authors
- Jin, J., Chen, B., Liu, L., Liu, R., Qian, G., Wei, H., & Zheng, J.
- Affiliations
- Changsha University of Science and Technology (CN)
- Central South University (CN)
- Corresponding author
- Jin, Jiao
- Liu, Ruohua
- Qian, Guoping
- Venue
- Materials
- Publisher
- MDPI AG
- Published
- 2019-06-13
- Volume
- 12
- Issue
- 12
- Pages
- 1910
- ISSN
- 1996-1944 (ISSN-L)
- PMC
- PMC6631065
- OpenAlex
- W2949353791
- Cited by
- 29
- References
- 37
- Citations by year
- 2026: 2 · 2025: 3 · 2024: 2 · 2023: 4 · 2022: 6 · 2021: 8 · 2020: 2 · 2019: 2
- FWCI
- 3.37
- Type
- journal article
- Language
- en
- Open access
- gold
- dx.doi.org
- Licence
- Locations
- Materials (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- National Natural Science Foundation of China (51704040, 51708048)
- Hunan Provincial Natural Science Foundation of China (2019JJ50663)
- Open Fund of Key Laboratory of Special Environment Road Engineering of Hunan Province (kfj160501&170502)
- Key Projects of Hunan Province-Technological Innovation Project in Industry (2016GK2096)
- Opening Project of Key Laboratory of Road Structure and Materials, Guangxi (2018gxjgclkf001)
- Topics
- Physical Sciences › Engineering › Civil and Structural Engineering › Asphalt Pavement Performance Evaluation
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › TiO2 Photocatalysis and Solar Cells
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer Nanocomposites and Properties
- Keywords
- modified asphalt, metal-doped TiO2, photocatalytic degradation, vehicle emissions, cerium doping, copper doping, iron doping, asphalt aging, UV resistance, high-temperature performance, optical absorption edge red shift, sol-gel synthesis
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