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- W4224284539 endingPage "2105792" @default.
- W4224284539 startingPage "2105792" @default.
- W4224284539 abstract "Piezoelectric semiconductors have emerged as redox catalysts, and challenges include effective conversion of mechanical energy to piezoelectric polarization and achieving high catalytic activity. The catalytic activity can be enhanced by simultaneous irradiation of ultrasound and light, but the existing piezoelectric semiconductors have trouble absorbing visible light. A piezoelectric catalyst is designed and tested for the generation of hydrogen peroxide (H2 O2 ). It is based on Nb-doped tetragonal BaTiO3 (BaTiO3 :Nb) and is sensitized by carbon quantum dots (CDs). The photosensitizer injects electrons into the conduction band of the semiconductor, while the piezoelectric polarization directed electrons to the semiconductor surface, allowing for a high-rate generation of H2 O2 . The piezoelectric polarization field restricts the recombination of photoinduced electron-hole pairs. A production rate of 1360 µmol gcatalyst-1 h-1 of H2 O2 is achieved under visible light and ultrasound co-irradiation. Individual piezo- and photocatalysis yielded lower production rates. Furthermore, the CDs enhance the piezocatalytic activity of the BaTiO3 :Nb. It is noted that moderating the piezoelectricity of BaTiO3 :Nb via microstructure modulation influences the piezophotocatalytic activity. This work shows a new methodology for synthesizing H2 O2 by using visible light and mechanical energy." @default.
- W4224284539 created "2022-04-26" @default.
- W4224284539 creator A5018426300 @default.
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- W4224284539 date "2022-04-22" @default.
- W4224284539 modified "2023-10-11" @default.
- W4224284539 title "Efficient Production of Solar Hydrogen Peroxide Using Piezoelectric Polarization and Photoinduced Charge Transfer of Nanopiezoelectrics Sensitized by Carbon Quantum Dots" @default.
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- W4224284539 doi "https://doi.org/10.1002/advs.202105792" @default.
- W4224284539 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35451215" @default.
- W4224284539 hasPublicationYear "2022" @default.
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