In-situ thickness controlled growth of AlPO4-5 films

•c-oriented AlPO4-5 film was prepared on glass substrate by a simple in-situ growth method.•The water content in the synthesis gel played an important role in the degree of orientation and coverage of AlPO4-5 films.•Angle of placement of the substrate in the reaction vessels, give a great effect on the thickness of the AlPO4-5 film.

Uniformly c-oriented AlPO4-5 films were prepared on a glass substrate by a simple in-situ growth method. The water content of the synthesis gel played an important role in the synthesis of c-axis-oriented films that were perfectly aligned along the c-axis and exhibited high coverage. We also optimized the growth conditions by varying the reaction time and temperature, and suggested a simple and effective strategy for controlling the thickness of AlPO4-5 films. Furthermore, AlPO4-5 films with various thicknesses were obtained by adjusting the height and tilt angle of the substrate in the reaction vessel. We believe that this work provides a simple and effective pathway for controlling the thickness and orientation of AlPO4-5 films and can therefore expand the possible range of applications of molecular sieve films.

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