Remarkably enhanced piezo-photocatalytic performance in BaTiO3/CuO heterostructures for organic pollutant degradation

Abstract

Introducing polarization field of piezoelectric materials is an effective strategy to improve photocatalytic performance. In this study, a new type of BaTiO3/CuO heterostructure catalyst was designed and synthesized to achieve high piezo-photocatalytic activity through the synergy of heterojunction and piezoelectric effect. The BaTiO3/CuO heterostructure shows a significantly enhanced piezo-photocatalytic degradation efficiency of organic pollutants compared with the individual BaTiO3 nanowires (NWs) and CuO nanoparticles (NPs). Under the co-excitation of ultrasonic vibration and ultraviolet radiation, the optimal degradation reaction rate constant k of polarized BaTiO3/CuO heterostructure on methyl orange (MO) dye can reach 0.05 min−1, which is 6.1 times of photocatalytic rate and 7 times of piezocatalytic rate. The BaTiO3/CuO heterostructure with remarkable piezo-photocatalytic behavior provides a promising strategy for the development of high-efficiency catalysts for wastewater purification, and it also helps understand the coupling mechanism between piezoelectric effect and photocatalysis.

The tunability of oxygen evolution reaction performance in La0.67Sr0.33CoO3 van der Waals membrane

“…However, because interfacial strain requires different substrates with distinct lattice constants, comparison of such strain effect faces the severe challenge that interfacial strain may cause cobaltate stoichiometry offset, octahedral rotation, etc. [5][6][7][8] Thus an in situ strain change on the OER performance of the singlecrystal cobaltate is highly desired to maximally reduce the uncertainty from individual samples.…”

Design of an interface heating device based on polydivinylbenzene/SiO2/Bi2WO6and its visible light response performance for water purification

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A Novel Strategy for Excellent Piezocatalytic Activity in Lead-Free BaTiO3-Based Materials via Manipulating the Multiphase Coexistence

“…The BT nanocubes/cuboids with selectively deposited Ag nanoparticles on the positively polar facets showed high-piezocatalytic activity in both dye and nondye pollutants degradation . It can be found that most of these studies about the improvement of piezocatalytic activity of BT-based materials have mainly focused on the morphology regulation, , noble metals’ deposition, , doping, , and construction of heterojunction. , In addition, the piezoelectric activities of materials also play a crucial role in the piezocatalytic process. However, there are few reports on enhancing the piezocatalytic performance in BT-based materials by promoting the piezoelectric activity of the piezocatalysts .…”