This work reports a new approach to amending polydimethylsiloxane (PDMS) by supporting α-Fe2O3 nanoparticles (NPs), thereby generating a material suitable for use as a negative triboelectric material. Additionally, human hair...
A high-entropy oxide nanocomposite with Ag(CuZn)(AlCr)2O4 and CuO phases is fabricated to form an abundantly
hierarchical wrinkled surface. Application of a mechanical force to
the nanocomposite resulted in a nonhomogeneous strain gradient at
the interface between the Ag(CuZn)(AlCr)2O4 and
CuO phases, changing the local charge distribution and creating flexoelectric
polarization that delayed electron/hole recombination. Transmission
electron microscopy energy-dispersive X-ray spectroscopy mapping revealed
that the Ag, Cu, Zn, Al, Cr, and O elements were highly distributed
throughout the nanocomposite. The nanocomposite produced 2116 μmol·g–1 h–1 of H2 without external
light irradiation, which is 980% higher than the H2 produced
by the same nanocomposite under the photocatalytic process. A strong
electrical field is observed at the interface between the Ag(CuZn)(AlCr)2O4 and CuO phases, demonstrating that a flexoelectric
potential (flexopotential) is established at the structural boundaries
because the strain gradient is localized at these interfaces. The
nanocomposite is a promising approach for environmentally friendly
energy production.
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