Piezo-promoted the generation of reactive oxygen species and the photodegradation of organic pollutants

Chen, Yao; Deng, Xiaoming; Wen, Jieya; Zhu, Jian Hua; Bian, Zhenfeng

doi:10.1016/j.apcatb.2019.118024

Cited by 94 publications

(43 citation statements)

References 61 publications

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“…Because of the large contact area between 2D MoS 2 and Fe‐porphyrin, there's giant transmission of photo‐generated electrons in response of the polarization from piezo‐potentials. [ 135 ]…”

Section: Piezo‐photocatalysismentioning

confidence: 99%

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

Guo

Zhang

et al. 2020

Adv Funct Materials

552

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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Section: Piezo‐photocatalysismentioning

confidence: 99%

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

Guo

Zhang

et al. 2020

Adv Funct Materials

552

320

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“…Then, it was dried at 70 o C for 12 h in an air oven and added into 50 mL of 5 mg/L RhB dye solution for the next 18 cycles. There is a slight decrease of the decomposition ratio after recycling the catalyst for 3 times, indicating the remarkable stability of its pyrocatalytic decomposition performance for RhB dye [57]. Furthermore, as a magnetic material, BiFeO3 also has been reported with the excellent recyclable ability [58], which makes the recycling process of the catalyst convenient.…”

Section: Resultsmentioning

confidence: 99%

The enhanced pyrocatalysis of the pyroelectric BiFeO3/g-C3N4 heterostructure for dye decomposition driven by cold-hot temperature alternation

Chen

Yao

et al. 2020

Preprint

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The BiFeO3/g-C3N4 heterostructure, which is fabricated via a simple mixing-calcining method, benefits the significant enhancement of the pyrocatalytic performance. With the growth of g-C3N4 content in the heterostructure pyrocatalysts from 0 to 25 %, the decomposition ratio of Rhodamine B (RhB) dye after 18 cold-hot temperature fluctuation (25 oC - 65 oC) cycles increases at first and then decreases, reaching a maximum value of ~ 94.2 % at 10 % while that of the pure BiFeO3 is ~ 67.7 %. The enhanced dye decomposition may be due to the generation of the internal electric field which strengthens the separation of the positive and negative carriers and further accelerates their migrations. The intermediate products in the pyrocatalytic reaction also have been detected and confirmed, which proves the key role of the pyroelectric effect in realizing the dye decomposition using BiFeO3/g-C3N4 heterostructure catalyst. The pyroelectric BiFeO3/g-C3N4 heterostructure shows the potential application in pyrocatalytically degrading dye wastewater.

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“…The piezo enhanced photo-degradation of methylene blue was obtained using two simultaneous external triggers: the mechanical stimulus, that produces a charge accumulation on the ZnO surfaces, and the UV-Vis light. This phenomenon, known as photo-piezo degradation [ 59 , 60 , 61 ], is a relatively recent approach to induce the catalysis of organic compounds [ 33 ]. The piezo-enhanced photo-induced degradation mechanism can be schematized as in Figure 1 : UV photons promote the electrons in the ZnO conduction band and an equal number of holes in the valence band ( Figure 9 A).…”

Section: Discussionmentioning

confidence: 99%

Wet Synthesis of Elongated Hexagonal ZnO Microstructures for Applications as Photo-Piezoelectric Catalysts

et al. 2020

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It is well known that energetic demand and environmental pollution are strictly connected; the side products of vehicle and industrial exhausts are considered extremely dangerous for both human and environmental health. In the last years, the possibility to simultaneously photo-degrade water dissolved pollutants by means of ZnO nanostructures and to use their piezoelectric features to enhance the photo-degradation process has been investigated. In the present contribution, an easy and low-cost wet approach to synthetize hexagonal elongated ZnO microstructures in the wurtzite phase was developed. ZnO performances as photo-catalysts, under UV-light irradiation, were confirmed on water dissolved methylene blue dye. Piezoelectric responses of the synthetized ZnO microstructures were evaluated, as well, by depositing them into films onto flexible substrates, and a home-made layout was developed, in order to stimulate the ZnO microstructures deposited on solid supports by means of mechanical stress and UV photons, simultaneously. A relevant increment of the photo-degradation efficiency was observed when the piezopotential was applied, proposing the present approach as a completely eco-friendly tool, able to use renewable energy sources to degrade water solved pollutants.

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Piezo-promoted the generation of reactive oxygen species and the photodegradation of organic pollutants

Cited by 94 publications

References 61 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

The enhanced pyrocatalysis of the pyroelectric BiFeO3/g-C3N4 heterostructure for dye decomposition driven by cold-hot temperature alternation

Wet Synthesis of Elongated Hexagonal ZnO Microstructures for Applications as Photo-Piezoelectric Catalysts

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