Metal–organic
framework (MOF) membranes have significant
application prospects in different fields, such as separation, detection,
anticorrosion and energy capture and conversion and so on. However,
the difficulty of constructing free-standing MOF membranes has hindered
their applications. Here, we propose a facile strategy to fabricate
free-standing MOF sheets with easy-peeling and easy-transfer properties
through electrochemical printing on superhydrophobic micropillar-structured
substrates. During the electrochemical printing process, electrophoretic
deposition will occur along the solid/liquid/gas triphase interface
on these substrates. First, the effects of the electrophoretic deposition
conditions, such as deposition time and current, on the thickness-controlled
growth on superhydrophobic substrates are explored. Then, the influences
of the geometric parameters, such as diameter and distance, and wettability
of the micropillars on constructing free-standing MOF sheets are systematically
studied. Furthermore, the MOF sheets exhibit the properties of capillarity-assisted
peeling from superhydrophobic substrates and spreading-assisted transfer
to superhydrophilic substrates, followed by the demonstration of the
generality. Therefore, it is a facile method to prepare free-standing
MOF sheets with easy-peeling and easy-transfer properties taking advantage
of electrochemical printing on superhydrophobic substrates, giving
impetus to the improvement of the productivity and the corresponding
applications in various fields.