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.

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.Figure optionsDownload 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.