Immobilisation of titanium dioxide onto supporting materials in heterogeneous photocatalysis: A review
The aim of this review is to offer an overview of the evolution in the use of different anchors (supports) for the immobilisation of a semiconductor photocatalyst, which is titanium dioxide (TiO2). Several supports and immobilisation techniques that are commonly used for the removal of contaminants in wastewater are discussed. Generally, the immobilisation of a photocatalyst onto supporting material has largely been carried out via one of two major routes; physical (the thermal treatment method) route or chemical (the sol–gel method, chemical vapour deposition, electrodeposition, etc.) route. The benefits and drawbacks of various immobilisation techniques to obtain a high surface area TiO2 support are also discussed.
Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (99 K)Download as PowerPoint slideResearch highlights▶ An overview of the evolution in the use of different supports for the immobilisation of a semiconductor photocatalyst, titanium dioxide (TiO2). ▶ The preparation procedure and the type of substrates used greatly influence the photocatalytic activity of TiO2. ▶ A good immobilisation method depends on the type of support used, on the type of pollutants that are to be degraded and consideration of the immobilisation techniques and the photoreactor design.
Journal: Applied Catalysis A: General - Volume 389, Issues 1–2, 1 December 2010, Pages 1–8