Remarkably enhanced piezo-photocatalytic performance of Z-scheme Bi2WO6/Black TiO2 heterojunction via piezoelectric effect

Amorphous CoB layer cooperates with piezoelectric polarization to boost carrier separation of Bi2WO6 for efficient piezo-PEC performance

“…The Linear Scanning Voltammetry (LSV) curve scans the potential in the positive direction at a scanning rate of 10 mV s −1 . According to the following formula: 42 E ( vs. RHE) = E ( vs. Ag/AgCl) + 0.0591 × pH + 0.197By changing the wavelength of the Xe arc light source, the incident photon current efficiency (IPCE) of samples irradiated by different wavelength light sources was measured at 1.23 V vs. RHE. The electrochemical impedance spectrum (EIS) of the sample was tested under 10 mV sinusoidal AC interference in the frequency range of 1–105 Hz.…”

“…Lei et al 41 effectively inhibited the complex of photogenic carriers through the internal electric field generated by piezoelectric-polarization induced by ultrasound, thus realizing the high efficiency of Bi 2 WO 6 piezoelectric photocatalytic degradation of organic pollutants. Shen et al 42 constructed TiO 2 /Bi 2 WO 6 heterostructures. The internal electric field generated by ultrasonic waves effectively accelerates the separation and transmission of photogenerated charge in the heterogeneous structure.…”

Two-dimensional ternary pentagonal BCX (X = P, As, and Sb): promising photocatalyst semiconductors for water splitting with strong piezoelectricity

“…19 Under this strategy, several heterostructures with excellent piezoelectricity, light absorption ability, and charge transfer presented outstanding photo-piezoelectric catalytic efficiency. 20–25…”

“…19 Under this strategy, several heterostructures with excellent piezoelectricity, light absorption ability, and charge transfer presented outstanding photo-piezoelectric catalytic efficiency. [20][21][22][23][24][25] However, suitable piezoelectric semiconductor materials with visible light activity and the ability to couple both piezoelectric and photoexcitation effects are still lacking, making the search for such materials critical. Recently, ternary pentagonal monolayer BCN, BNSi and BCP have been theoretically predicted to be stable, all of them are piezoelectric semiconductors, and the band edge position meets the conditions of photocatalytic hydrolysis, so they may have the potential to be excellent hydrolysis photocatalysts.…”

Lattice Fluorine and Adsorbed Fluorine Combine with Piezoelectric Polarization to Boost the Separation of Bulk and Surface Carriers of Bi2WO6 for Achieving Efficient Piezo-PEC Performance

“…39 For example, Wei et al 40 successfully synthesized ultrathin GQD-modified Bi 2 WO 6 hydrogels to achieve efficient piezo-PEC activity, and Lei et al 41 effectively inhibited the complexation of photogenerated carriers through the internal established electric field produced by ultrasound-induced piezoelectric polarization, thus achieving efficient Bi 2 WO 6 piezoelectric photocatalytic degradation of organic contaminants. Shen et al 42 constructed TiO 2 /Bi 2 WO 6 heterostructures. The built-in electric field generated by ultrasound effectively accelerated the separation and transmission of photogenerated charges in the heterostructures.…”