Photocatalytic Concrete Using ZnO and Al₂O₃ - A Review

¹ Laboratory of Structure, Department of Civil Engineering and Planning, Universitas Negeri Malang, Indonesia
² Department of Civil Engineering and Planning, Universitas Negeri Malang, Indonesia
³ Department of Civil and Structural Engineering, The University of Sheffield, United Kingdom

^* Corresponding author: mirza.abdillah.ft@um.ac.id

Abstract

Photocatalytic concrete is one of the innovations in the construction sector that environmentally friendly. Photocatalytic concrete can be decomposing harmful pollutants such as nitrogen oxides (NO_x) and SO₂. In its application, a widely used photocatalyst is TiO₂. In fact, the use of TiO₂ has several disadvantages, which is less efficient because the separation of TiO₂ photocatalysts is very difficult and requires greater energy. In addition, the wide band-gap energy of TiO₂ makes only a fraction of the ultraviolet (UV) fraction of sunlight usable. This study aims to analyse photocatalysts that are more usable in large quantities and easy to apply. Based on research that has been done, the use of ZnO and Al₂O₃ as photocatalysts replaces the use of TiO₂ which has been used effectively to do. In addition to its simpler use, and its abundant availability, Al2O3 and ZnO can break down pollutants well.