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author:

Yang, Y. (Yang, Y..) [1] | Liu, C. (Liu, C..) [2] | Zhang, S. (Zhang, S..) [3] | Li, B. (Li, B..) [4] | Ji, T. (Ji, T..) [5] (Scholars:季韬)

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Scopus

Abstract:

Alkali-activated slag (AAS) materials have been extensively investigated and employed for the photocatalytic coating incorporation due to their favorable binding property and low carbon emissions. However, the effects of photocatalysts on the microstructure and mechanical performance of AAS composites remain controversial, which have a significant impact on the durability of the photocatalytic composites in the real-life service environment. Herein, polymeric carbon nitride (PCN), as a metal-free photocatalyst, was mixed with AAS materials to prepare photocatalytic composites for nitrogen oxide (NOx) removal and surface self-cleaning. The PCN dosage effects on hydration products, microstructure, as well as mechanical and photocatalytic performances of the photocatalytic AAS composites were systematically studied. The results show that while hydration product formations are hindered by the PCN addition, its presence contributes to the carbonization of AAS composites. Additionally, due to the PCN microfiller effect, the microstructure of AAS composites is improved with the PCN addition, and the compressive strength of AAS composites becomes stronger as PCN dosage increases from 0 % to 6 %. The photocatalytic NOx removal and self-cleaning performances of PCN-added AAS composites are firstly increased and then decreased with the PCN addition. These findings provide the theoretical basis and technical support for PCN-added AAS composites application which satisfies the requirement for a sustainable and low carbon footprint future. © 2024 Elsevier Ltd

Keyword:

Alkali-activated slag Mechanical performance NOx removal Polymeric carbon nitride Self-cleaning

Community:

  • [ 1 ] [Yang Y.]Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering, School of Civil Engineering, Fujian University of Technology, Fuzhou, 350118, China
  • [ 2 ] [Yang Y.]College of Civil Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 3 ] [Liu C.]Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering, School of Civil Engineering, Fujian University of Technology, Fuzhou, 350118, China
  • [ 4 ] [Zhang S.]Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering, School of Civil Engineering, Fujian University of Technology, Fuzhou, 350118, China
  • [ 5 ] [Li B.]College of Civil Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 6 ] [Ji T.]College of Civil Engineering, Fuzhou University, Fuzhou, 350116, China

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Source :

Journal of Environmental Chemical Engineering

ISSN: 2213-3437

Year: 2024

Issue: 5

Volume: 12

7 . 4 0 0

JCR@2023

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ESI Highly Cited Papers on the List: 0 Unfold All

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Chinese Cited Count:

30 Days PV: 1

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