Photocatalytic NO x Removal Performance of TiO 2 -Coated Permeable Concrete: Laboratory Optimization and Field Demonstration.
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| Title: | Photocatalytic NO x Removal Performance of TiO 2 -Coated Permeable Concrete: Laboratory Optimization and Field Demonstration. |
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| Authors: | Kim, Han-Na1 (AUTHOR), Kim, Hyeok-Jung2 (AUTHOR) ceasare@hoseo.edu |
| Source: | Materials (1996-1944). Jan2026, Vol. 19 Issue 1, p148. 17p. |
| Subjects: | Titanium dioxide, Urban pollution, Field research, Photocatalysis, Concrete, Sustainability, Abatement (Atmospheric chemistry), Laboratory techniques |
| Abstract: | Nitrogen oxides (NOx) emitted mainly from vehicle exhaust significantly contribute to urban air pollution, leading to photochemical smog and secondary particulate matter. Photocatalytic technology has emerged as a promising solution for continuous NOx decomposition under ultraviolet (UV) irradiation. This study developed an eco-friendly permeable concrete incorporating activated loess and zeolite to improve roadside air quality. The high porosity and adsorption capability of the concrete provided a suitable substrate for a TiO2-based photocatalytic coating. A single-component coating system was optimized by introducing colloidal silica to enhance TiO2 particle dispersibility and adding a binder to secure durable adhesion on the concrete surface. The produced permeable concrete met sidewalk quality standards specified in SPS-F-KSPIC-001-2006. Photocatalytic NOx removal performance evaluated by ISO 22197-1 showed a maximum removal efficiency of 77.5%. Even after 300 h of accelerated weathering, the activity loss remained within 13.8%, retaining approximately 80% of the initial performance. Additionally, outdoor mock-up testing under natural light confirmed NOx concentration removal and formation of nitrate by-products, demonstrating practical applicability in real environments. Overall, the integration of permeable concrete and a durable, single-component TiO2 photocatalytic coating provides a promising approach to simultaneously enhance pavement sustainability and reduce urban NOx pollution. [ABSTRACT FROM AUTHOR] |
| Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 190787154 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Photocatalytic NO x Removal Performance of TiO 2 -Coated Permeable Concrete: Laboratory Optimization and Field Demonstration. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kim%2C+Han-Na%22">Kim, Han-Na</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kim%2C+Hyeok-Jung%22">Kim, Hyeok-Jung</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> ceasare@hoseo.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Jan2026, Vol. 19 Issue 1, p148. 17p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Titanium+dioxide%22">Titanium dioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Urban+pollution%22">Urban pollution</searchLink><br /><searchLink fieldCode="DE" term="%22Field+research%22">Field research</searchLink><br /><searchLink fieldCode="DE" term="%22Photocatalysis%22">Photocatalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Concrete%22">Concrete</searchLink><br /><searchLink fieldCode="DE" term="%22Sustainability%22">Sustainability</searchLink><br /><searchLink fieldCode="DE" term="%22Abatement+%28Atmospheric+chemistry%29%22">Abatement (Atmospheric chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Laboratory+techniques%22">Laboratory techniques</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Nitrogen oxides (NOx) emitted mainly from vehicle exhaust significantly contribute to urban air pollution, leading to photochemical smog and secondary particulate matter. Photocatalytic technology has emerged as a promising solution for continuous NOx decomposition under ultraviolet (UV) irradiation. This study developed an eco-friendly permeable concrete incorporating activated loess and zeolite to improve roadside air quality. The high porosity and adsorption capability of the concrete provided a suitable substrate for a TiO2-based photocatalytic coating. A single-component coating system was optimized by introducing colloidal silica to enhance TiO2 particle dispersibility and adding a binder to secure durable adhesion on the concrete surface. The produced permeable concrete met sidewalk quality standards specified in SPS-F-KSPIC-001-2006. Photocatalytic NOx removal performance evaluated by ISO 22197-1 showed a maximum removal efficiency of 77.5%. Even after 300 h of accelerated weathering, the activity loss remained within 13.8%, retaining approximately 80% of the initial performance. Additionally, outdoor mock-up testing under natural light confirmed NOx concentration removal and formation of nitrate by-products, demonstrating practical applicability in real environments. Overall, the integration of permeable concrete and a durable, single-component TiO2 photocatalytic coating provides a promising approach to simultaneously enhance pavement sustainability and reduce urban NOx pollution. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/ma19010148 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 17 StartPage: 148 Subjects: – SubjectFull: Titanium dioxide Type: general – SubjectFull: Urban pollution Type: general – SubjectFull: Field research Type: general – SubjectFull: Photocatalysis Type: general – SubjectFull: Concrete Type: general – SubjectFull: Sustainability Type: general – SubjectFull: Abatement (Atmospheric chemistry) Type: general – SubjectFull: Laboratory techniques Type: general Titles: – TitleFull: Photocatalytic NO x Removal Performance of TiO 2 -Coated Permeable Concrete: Laboratory Optimization and Field Demonstration. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kim, Han-Na – PersonEntity: Name: NameFull: Kim, Hyeok-Jung IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 19961944 Numbering: – Type: volume Value: 19 – Type: issue Value: 1 Titles: – TitleFull: Materials (1996-1944) Type: main |
| ResultId | 1 |
