Enhancement effect in the piezoelectric degradation of organic pollutants by piezo‐Fenton process

Lv, Wei; Kong, Lingjun; Lan, Shenyu; Feng, Jinxi; Tian, Shuanghong

doi:10.1002/jctb.4981

Cited by 82 publications

(41 citation statements)

References 23 publications

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“…Since ZnO NWs, BaTiO 3 nano‐branches/NWs [ 57 ] and NaNbO 3 nanofibers [ 58 ] can be easily bent, piezocatalysis and piezo‐photocatalysis can be induced by the different forms of mechanical energy, such as sonic wave, tide, wind, and atmospheric pressure. The catalytic process is also influenced by the piezoelectric constant which reflects the conversion efficiency from mechanical energy to electricity, as described by the piezoelectric equation (type d and i ): [ 59 ]

\begin{matrix} d = (\frac{δ e}{δ E}) η = (\frac{δ D}{δ η}) E \end{matrix}

\begin{matrix} i = (- \frac{δ η}{δ E}) e = (\frac{δ D}{δ e}) E \end{matrix}

where d and i represent piezoelectric strain and stress constant, respectively; (1)(2) reflect the relationships between relative strain/stress ( e /η) caused by electric field ( E ) and the relative electric displacement ( D ).…”

Section: Piezocatalysismentioning

confidence: 99%

Piezocatalysis and Piezo‐Photocatalysis: Catalysts Classification and Modification Strategy, Reaction Mechanism, and Practical Application

Guo

Zhang

et al. 2020

Adv Funct Materials

608

320

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Piezoelectric-based catalysis that relies on the charge energy or separation efficiency of charge carriers has attracted significant attention. The piezo-potential induced by strain or stress can induce a giant electric field, which has been demonstrated to be an effective means for charge energy shifting or transferring electrons and holes. In recent years, intense efforts have been made in this subject, and the research has mainly focussed on two aspects: i) Alteration of surface charge energy by piezo-potential in piezocatalysis; ii) the separation of photo-generated charge carriers and the catalytic activity enhancement of an integrated piezoelectric semiconductor or coupled system composed of piezoelectrics and semiconductors. Systematically summarizing the advances of the above two aspects is helpful in the context of deepening understanding of the relevant issues and developing new ideas for piezoelectric-based catalysis. In this review, a comprehensive summary on piezocatalysis and piezo-photocatalysis is provided. The charge transfer behaviors and catalytic mechanisms over a large variety of piezocatalysts and piezo-photocatalysts are systematically analyzed. In addition, the types of mechanical energy, strategies for enhancing piezocatalysis, and the advanced applications of piezocatalysis and piezophotocatalysis are discussed. Finally, the promising development directions of piezocatalysis and piezo-photocatalysis, such as materials, assembly forms, and applications in the future are proposed.

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\begin{matrix} d = (\frac{δ e}{δ E}) η = (\frac{δ D}{δ η}) E \end{matrix}

\begin{matrix} i = (- \frac{δ η}{δ E}) e = (\frac{δ D}{δ e}) E \end{matrix}

Section: Piezocatalysismentioning

confidence: 99%

Piezocatalysis and Piezo‐Photocatalysis: Catalysts Classification and Modification Strategy, Reaction Mechanism, and Practical Application

Guo

Zhang

et al. 2020

Adv Funct Materials

608

320

View full text Add to dashboard Cite

show abstract

“…[ 109 ] In the so‐called “piezo‐Fenton process,” the piezoelectric effect of BaTiO 3 nanoparticles could in situ drive the generation of H 2 O 2 , which is facilely turned into hydroxyl radical, leading to degradation of AO7 pollutants. [ 110 ]…”

Section: Piezoelectric Polarization Promoted Photo(electro)catalysismentioning

confidence: 99%

Advances in Piezo‐Phototronic Effect Enhanced Photocatalysis and Photoelectrocatalysis

Pan

Sun

Chen

et al. 2020

Advanced Energy Materials

433

236

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The storage/utilization of solar energy is a promising strategy to alleviate current disparities in energy shortage Direct conversion of solar light into chemical energy by means of photocatalysis or photoelectrocatalysis is currently a point of focus for sustainable energy development and environmental remediation. However, its current efficiency is still far from satisfying, suffering especially from severe charge recombination. To solve this problem, the piezo-phototronic effect has emerged as one of the most effective strategies for photo(electro)catalysis. Through the integration of piezoelectricity, photoexcitation, and semiconductor properties, the built-in electric field by mechanical stimulation induced polarization can serve as a flexible autovalve to modulate the charge-transfer pathway and facilitate carrier separation both in the bulk phase and at the surfaces of semiconductors. This review focuses on illustrating the trends and impacts of research based on piezo-enhanced photocatalytic reactions. The fundamental mechanisms of piezo-phototronics modulated band bending and charge migration are highlighted. Through comparing and classifying different categories of piezo-photocatalysts (like the typical ZnO, MoS 2 , and BaTiO 3 ), the recent advances in polarization-promoted photo(electro)catalytic processes involving water splitting and pollutant degradation are overviewed. Meanwhile the optimization methods to promote their catalytic activities are described. Finally, the outlook for future development of polarization-enhanced strategies is presented.

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“…The latter provides a driving force for the transport of photoionization charge carriers and promotes separation of electron-hole pairs. [93] Lv et al [94] further extended the piezoelectric catalytic process by coupling the traditional piezoelectric catalytic effect with a Fenton reaction. The degradation rate of AO 7 was 93.4% by combining BaTiO 3 microcrystals with ferrous ions.…”

Section: Piezoelectric Materialsmentioning

confidence: 99%

Photocatalytic Advanced Oxidation Processes for Water Treatment: Recent Advances and Perspective

Liu

Wang

2020

Chemistry An Asian Journal

195

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Nowadays, an ever-increasing variety of organic contaminants in water has caused hazards to the ecological environment and human health. Many of them are persistent and non-biodegradable. Various techniques have been studied for sewage treatment, including biological, physical and chemical methods. Photocatalytic advanced oxidation processes (AOPs) have received increasing attention due to their fast reaction rates and strong oxidation capability, low cost compared with the non-photolytic AOPs. This review is dedicated to summarizing up-to-date research progress in photocatalytic AOPs, such as Fenton or Fenton-like reaction, ozonation and sulfate radical-based advanced oxidation processes. Mechanisms and activation processes are discussed. Then, the paper summarizes photocatalytic materials and modification strategies, including defect chemistry, morphology control, heterostructure design, noble metal deposition. The future perspectives and challenges are also discussed.

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Enhancement effect in the piezoelectric degradation of organic pollutants by piezo‐Fenton process

Cited by 82 publications

References 23 publications

Piezocatalysis and Piezo‐Photocatalysis: Catalysts Classification and Modification Strategy, Reaction Mechanism, and Practical Application

Piezocatalysis and Piezo‐Photocatalysis: Catalysts Classification and Modification Strategy, Reaction Mechanism, and Practical Application

Advances in Piezo‐Phototronic Effect Enhanced Photocatalysis and Photoelectrocatalysis

Photocatalytic Advanced Oxidation Processes for Water Treatment: Recent Advances and Perspective

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