Photocatalytic Cementitious Material for Eco-Efficient Construction—A Systematic Literature Review
Hamdany A.H. Satyanaga A. Zhang D. Kim Y. Kim J.R.
September 2022MDPI
Applied Sciences (Switzerland)
2022#12Issue 17
Photoinduced processes governed by light activated TiO2 have been studied in many ways. One of the most active areas is the development of TiO2 photocatalysis technologies on their application for reducing environmental impacts. The immobilization of TiO2 on solid support, such as cementitious materials, greatly enhances its use in practical applications. In this review, a wide range of applications for achieving eco-efficient building using cementitious composite materials containing TiO2 photocatalyst was presented. The basic mechanism of photocatalysis, such as electron excitation, charge transfer process, reactive oxygen species (ROS) generation, and its role to oxidize the pollutant and microorganisms were extensively discussed. Unlike self-cleaning and air purification systems, the study on the antibacterial function of a cement-based surface containing TiO2 is very limited. In photocatalytic cementitious materials, the key element affecting the photocatalytic performance is the accessible active surface area. However, microstructure of cementitious materials changes with age due to hydration and surface carbonation. Hence, surface area reduction and mass transfer limitation become the main drawbacks of incorporating TiO2 in cementitious materials. This review, therefore, provides the state of the art in photocatalytic cement-based composite materials and identifies the areas in which future improvement is needed.
cementitious materials , composite materials , photocatalysis , titanium dioxide
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School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore
Department of Civil and Environmental Engineering, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
School of Engineering, University of Glasgow, Singapore, 138683, Singapore
School of Civil and Environmental Engineering
Department of Civil and Environmental Engineering
School of Engineering
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