Over the past several years, a new surge of interest in paper electronics has arisen due to the numerous merits of simple micro/nanostructured substrates. Herein, the latest advances and principal issues in the design and fabrication of paper-based flexible electronics are highlighted. Following an introduction of the fascinating properties of paper matrixes, the construction of paper substrates from diverse functional materials for flexible electronics and their underlying principles are described. Then, notable progress related to the development of versatile electronic devices is discussed. Finally, future opportunities and the remaining challenges are examined. It is envisioned that more design concepts, working principles, and advanced papermaking techniques will be developed in the near future for the advanced functionalization of paper, paving the way for the mass production and commercial applications of flexible paper-based electronic devices.
Considering
the flexibility, adjustable pore structure, and abundant
active sites of metal–organic frameworks (MOFs), rational design
and fine control of the MOF-based hetero-nanocrystals is a highly
important and challenging subject. In this work, self-assembly of
a 3D hollow BiOBr@Bi-MOF microsphere was fabricated through precisely
controlled dissociation kinetics of the self-sacrificial template
(BiOBr) for the first time, where the residual quantity of BiOBr and
the formation of Bi-MOF were carefully regulated by changing the reaction
time and the capability of coordination. Meanwhile, the hollow microstructure
was formed in BiOBr@Bi-MOF through the Oswald ripening mechanism to
separate photogenerated electron–hole pairs and increase the
adsorption capacity of Bi-MOF for dyes, which significantly enhanced
the photocatalytic degradation efficiency of RhB from 56.4% for BiOBr
to 99.4% for the optimal BiOBr@Bi-MOF microsphere. This research broadens
the selectivity of semiconductor/MOF hetero-nanocrystals with reasonable
design and flexible synthesis.
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