Vibration catalysis of eco-friendly Na0.5K0.5NbO3-based piezoelectric: An efficient phase boundary catalyst

Zhang, An; Liu, Zhiyong; Xie, Bing; Lu, Jinshan; Guo, Kun; Ke, Shanming; Shu, Longlong; Fan, Huiqing

doi:10.1016/j.apcatb.2020.119353

Cited by 164 publications

(81 citation statements)

References 66 publications

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“…First, ferroelectrics generally show the highest piezoelectricity at the MPB composition, but nanosize MPB ferroelectrics are hard to synthesize. [ 62 , 63 ] Second, ferroelectric materials are mainly UV photocatalyst due to their wide bandgaps over 3 eV. BiFeO 3 shows especially lower bandgap ( E g ) of ≈2.7 eV among ferroelectric perovskite oxides, [ 64 ] but it is still unable to absorb full visible spectrum and create large enough band edge position for H 2 generation.…”

Section: Potential Applications Of Ferroelectrics In Energy and Envir...mentioning

confidence: 99%

Engineering the Defects and Microstructures in Ferroelectrics for Enhanced/Novel Properties: An Emerging Way to Cope with Energy Crisis and Environmental Pollution

et al. 2022

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In the past century, ferroelectrics are well known in electroceramics and microelectronics for their unique ferroelectric, piezoelectric, pyroelectric, and photovoltaic effects. Nowadays, the advances in understanding and tuning of these properties have greatly promoted a broader application potential especially in energy and environmental fields, by harvesting solar, mechanical, and heat energies. For example, high piezoelectricity and high pyroelectricity can be designed by defect or microstructure engineering for piezo‐ and pyro‐catalyst, respectively. Moreover, highly piezoelectric and broadband (UV–Vis–NIR) light‐responsive ferroelectrics can be designed via defect engineering, giving rise to a new concept of photoferroelectrics for efficient photocatalysis, piezocatalysis, pyrocatalysis, and related cocatalysis. This article first summarizes the recent developments in ferroelectrics in terms of piezoelectricity, pyroelectricity, and photovoltaic effects based on defect and microstructure engineering. Then, the potential applications in energy generation (i.e., photovoltaic effect, H2 generation, and self‐powered multisource energy harvesting and signal sensing) and environmental protection (i.e., photo‐piezo‐pyro‐ cocatalytic dye degradation and CO2 reduction) are reviewed. Finally, the outlook and challenges are discussed. This article not only covers an overview of the state‐of‐art advances of ferroelectrics, but also prospects their applications in coping with energy crisis and environmental pollution.

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Section: Potential Applications Of Ferroelectrics In Energy and Envir...mentioning

confidence: 99%

Engineering the Defects and Microstructures in Ferroelectrics for Enhanced/Novel Properties: An Emerging Way to Cope with Energy Crisis and Environmental Pollution

et al. 2022

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“…The hole on the VB of BSNT can react with OH − to form hydroxyl radicals (˙OH) because OH − /˙OH is less than positive than the VB, while O 2 /˙O 2 − is less negative than the CB of BSNT, indicating that the electrons in the CB can cause absorbed O 2 to form superoxide radical anions (˙O 2 − ). 41,42 This result indicates that the band structure of BSNT meets the requirement for the generation of active radicals for dye degradation.…”

Section: Resultsmentioning

confidence: 78%

“…5a shows the UV-vis absorption spectra of BSNT, and Fig. 5b shows the band gap, E g , derived from the formula ( αhν ) 1/2 = A ( hν − E g ) 41 with a value of 3.86 eV. Fig.…”

Section: Resultsmentioning

confidence: 99%

Tribocatalytic degradation of dyes by tungsten bronze ferroelectric Ba_2.5Sr_2.5Nb₈Ta₂O₃₀submicron particles

Sun

Guo

et al. 2021

RSC Adv.

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“…These are the fundamental working principles of piezopotential in charge separation and conduction regulation, and resembles a photoelectrochemical system that relies upon an external applied bias [27] . Experimental proof has been provided by Zhang et al., who employed transient piezoelectric current measurements and in situ electrochemical impedance spectroscopy to demonstrate the effects of piezopotential [24a] . As shown in Figure 3 a, the Li‐doped K 0.5 Na 0.5 NbO 3 (KNN) samples exhibit apparent enhancement of transient piezocurrent relative to pristine KNN in accordance with their piezoelectric properties, with a more efficient charge separation and transmission by piezopotential field evident.…”

Section: Energy Band Theorymentioning

confidence: 99%

The Mechanism of Piezocatalysis: Energy Band Theory or Screening Charge Effect?

et al. 2021

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Piezocatalysis, a newly emerging catalysis technology that relies on the piezopotential and piezoelectric properties of the catalysts, is attracting unprecedented research enthusiasm for applications in energy conversion, organic synthesis, and environmental remediation. Despite the rapid development in the past three years, the mechanism of piezocatalysis is still under debate. A fundamental understanding of the working principles of this technology should enable the future design and optimization of piezocatalysts. Herein, we provide an overview of the two popular theories used to explain the observed piezocatalysis: energy band theory and screening charge effect. A comprehensive discussion and clarification of the differences, relevance, evidence, and contradiction of the two mechanisms are provided. Finally, challenges and perspectives for future mechanistic studies are highlighted. Hopefully, this Review can help readers gain a better understanding of piezocatalysis and enable its application in their own research.

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Vibration catalysis of eco-friendly Na0.5K0.5NbO3-based piezoelectric: An efficient phase boundary catalyst

Cited by 164 publications

References 66 publications

Engineering the Defects and Microstructures in Ferroelectrics for Enhanced/Novel Properties: An Emerging Way to Cope with Energy Crisis and Environmental Pollution

Engineering the Defects and Microstructures in Ferroelectrics for Enhanced/Novel Properties: An Emerging Way to Cope with Energy Crisis and Environmental Pollution

Tribocatalytic degradation of dyes by tungsten bronze ferroelectric Ba_2.5Sr_2.5Nb₈Ta₂O₃₀submicron particles

The Mechanism of Piezocatalysis: Energy Band Theory or Screening Charge Effect?

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Vibration catalysis of eco-friendly Na0.5K0.5NbO3-based piezoelectric: An efficient phase boundary catalyst

Cited by 164 publications

References 66 publications

Engineering the Defects and Microstructures in Ferroelectrics for Enhanced/Novel Properties: An Emerging Way to Cope with Energy Crisis and Environmental Pollution

Engineering the Defects and Microstructures in Ferroelectrics for Enhanced/Novel Properties: An Emerging Way to Cope with Energy Crisis and Environmental Pollution

Tribocatalytic degradation of dyes by tungsten bronze ferroelectric Ba2.5Sr2.5Nb8Ta2O30submicron particles

The Mechanism of Piezocatalysis: Energy Band Theory or Screening Charge Effect?

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Tribocatalytic degradation of dyes by tungsten bronze ferroelectric Ba_2.5Sr_2.5Nb₈Ta₂O₃₀submicron particles