Synthesis of higher surface area mayenite by hydrothermal method

Mayenite (Ca12Al14O33) is an important material, being used as a transparent conductive oxide (TCO), catalysts for VOCs cleaning and ionic conductor. Unfortunately, the material has a very low BET surface area, generally below 10 m2/g and requires higher calcination temperature for the formation of mayenite phase. In this study, a new synthesis method, namely hydrothermal method, was employed for the synthesis of mayenite with higher BET surface area of about 70 m2/g, and also the calcination temperature decreased from over 1000 to just 400 °C. It was found that mayenite from different method shows different shapes.

Graphical abstractA new synthesis method, namely hydrothermal method, was employed for the synthesis of mayenite with higher BET surface area of about 70 m2/g, and also the calcination temperature decreased from over 1000 to just 400 °C. It was found that mayenite from different method shows different shapes.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Hydrothermal method was firstly used for mayenite (Ca12Al14O33) preparation. ► New mayenite has higher surface area (70 m2/g) comparing with traditional method (∼10 m2/g). ► Calcination temperature decreased from over 1000 to just 400 °C. ► Hydrothermal mayenite shows different shapes.