Engineering spherical lead zirconate titanate to explore the essence of piezo-catalysis

Feng, Yawei; Ling, Li−Li; Wang, Yanxu; Xu, Zhenmin; Cao, Fei; Li, Hexing; Bian, Zhenfeng

doi:10.1016/j.nanoen.2017.08.058

Cited by 310 publications

(145 citation statements)

References 39 publications

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“…The piezocatalytic ROS evolution performance of other bismuth‐based compounds, such as Bi 4 Ti 3 O 12 and Bi 2 O 2 (OH)(NO 3 ), was also reported. Though some advances have been achieved, the piezocatalytic ROS evolution is facing a bottleneck, as the piezocatalytic performance of the ROS evolution depends largely on the limited number of free carriers of piezoelectrics . Inspiringly, the combination of photocatalytic and piezocatalytic processes affords a solution to simultaneously improve the less carriers amount and low charge separation efficiency by providing photogenerated charge carriers and piezoelectric field.…”

Section: Introductionmentioning

confidence: 99%

Coupling Piezocatalysis and Photocatalysis in Bi₄NbO₈X (X = Cl, Br) Polar Single Crystals

Huang

Chen

et al. 2019

Adv Funct Materials

263

122

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Reactive oxygen species (ROS) as green oxidants are of great importance for environmental and biological applications. Photocatalysis is one of the major routes for ROS evolution, which is seriously restricted by rapid charge recombination. Herein, piezocatalysis and photocatalysis (i.e., piezo–photocatalysis) are coupled to efficiently produce superoxide radicals (•O2−), hydrogen peroxide (H2O2), and hydroxyl radicals (•OH) via oxygen reduction reaction (ORR), by using Bi4NbO8X (X = Cl, Br) single crystalline nanoplates. Significantly, the piezo‐photocatalytic process leads to the highest ORR performance of the Bi4NbO8Br nanoplates, exhibiting •O2−, H2O2, and •OH evolution rates of 98.7, 792, and 33.2 µmol g−1 h−1, respectively. The formation of a polarized electric field and band bending allows directional separation of charge carriers, promoting the catalytic activity. Furthermore, the reductive active sites are found enriched on all the facets in the piezo–photocatalytic process, also contributing to the ORR. By piezo–photodeposition of Pt to artificially plant reductive reactive sites, the Bi4NbO8Br plates demonstrate largely enhanced photocatalytic H2 production activity with a rate of 203.7 µmol g−1 h−1. The present work advances piezo–photocatalysis as a new route for ROS generation, but also discloses the potential of piezo–photocatalytic active sites enriching for H2 evolution.

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Section: Introductionmentioning

confidence: 99%

Coupling Piezocatalysis and Photocatalysis in Bi₄NbO₈X (X = Cl, Br) Polar Single Crystals

Huang

Chen

et al. 2019

Adv Funct Materials

263

122

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“…[9] In at ypical piezo-catalytic process, piezoelectric materials generate an electric field with external mechanical force, which can drive charge carriers (electrons and holes) participating in redox reactions such as water splitting [7,10] or elimination of pollutants. [9,11,12] Mechanistic analysis showedt hat H 2 O 2 could be generated in situ in the electrochemical process. [13] However,i n the process of pollutant degradation through the piezo-catalytic effect, H 2 O 2 is overlooked or only regarded as one of the active species to remove the pollutantsa nd the mechanism of generating H 2 O 2 is unclear.…”

mentioning

confidence: 99%

“…Next, the O 2 traps the electron and forms O 2 C À ,a ss hown in Equation (8). One of the possible ways of consuming OHC is when it receives one electron and H + to regenerate H 2 O, as shown in Equation (11);a nother is when four OHC convert into H 2 Oa nd O 2 ,ass hown in Equation (12). Then, protons and electrons interact with the O 2 C À to form H 2 O 2 ,a ss hown in Equation (10).…”

mentioning

confidence: 99%

Oxygen Reduction Reaction for Generating H₂O₂ through a Piezo‐Catalytic Process over Bismuth Oxychloride

et al. 2018

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Oxygen reduction reaction (ORR) for generating H O through green pathways have gained much attention in recent years. Herein, we introduce a piezo-catalytic approach to obtain H O over bismuth oxychloride (BiOCl) through an ORR pathway. The piezoelectric response of BiOCl was directly characterized by piezoresponse force microscopy (PFM). The BiOCl exhibits efficient catalytic performance for generating H O (28 μmol h ) only from O and H O, which is above the average level of H O produced by solar-to-chemical processes. A piezo-catalytic mechanism was proposed: with ultrasonic waves, an alternating electric field will be generated over BiOCl, which can drive charge carriers (electrons) to interact with O and H O, then to form H O .

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“…Similarly, the piezo‐photocatalytic mechanism is shown in Figure B. In recent past, piezocatalytic and piezo‐photocatalytic were reported by few researchers …”

Section: Resultsmentioning

confidence: 99%

“…In recent past, piezocatalytic and piezophotocatalytic were reported by few researchers. [40][41][42][43][44][45][46] Figure 6 shows the repetitive piezo-photocatalytic degradation performance of poled BCT-Sn powder using MB dye. The degradation of MB was calculated using the following;…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic, piezocatalytic, and piezo‐photocatalytic effects in ferroelectric (Ba_0.875Ca_0.125)(Ti_0.95Sn_0.05)O₃ ceramics

Liu

Sharma

2019

J Am Ceram Soc

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Ba0.875Ca0.125Ti0.95Sn0.05O3 (BCT‐Sn) was examined for photocatalytic, piezocatalytic, and piezo‐photocatalytic effects. BCT‐Sn powder was poled through corona poling and it was found that poling induces significant impact on photocatalysis. This material was also able to degrade dye (Methylene blue) using poled powder under ultrasonication (piezocatalysis). There was a remarkable effect in dye degradation which is a clear indication of the importance of piezocatalytic behavior in catalytic reactions. Moreover, the piezo‐photocatalytic effect (piezocatalysis + photocatalysis) was also investigated. Results suggested an enormous scope of ferroelectric materials in the field of catalysis.

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Engineering spherical lead zirconate titanate to explore the essence of piezo-catalysis

Cited by 310 publications

References 39 publications

Coupling Piezocatalysis and Photocatalysis in Bi₄NbO₈X (X = Cl, Br) Polar Single Crystals

Coupling Piezocatalysis and Photocatalysis in Bi₄NbO₈X (X = Cl, Br) Polar Single Crystals

Oxygen Reduction Reaction for Generating H₂O₂ through a Piezo‐Catalytic Process over Bismuth Oxychloride

Photocatalytic, piezocatalytic, and piezo‐photocatalytic effects in ferroelectric (Ba_0.875Ca_0.125)(Ti_0.95Sn_0.05)O₃ ceramics

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Engineering spherical lead zirconate titanate to explore the essence of piezo-catalysis

Cited by 310 publications

References 39 publications

Coupling Piezocatalysis and Photocatalysis in Bi4NbO8X (X = Cl, Br) Polar Single Crystals

Coupling Piezocatalysis and Photocatalysis in Bi4NbO8X (X = Cl, Br) Polar Single Crystals

Oxygen Reduction Reaction for Generating H2O2 through a Piezo‐Catalytic Process over Bismuth Oxychloride

Photocatalytic, piezocatalytic, and piezo‐photocatalytic effects in ferroelectric (Ba0.875Ca0.125)(Ti0.95Sn0.05)O3 ceramics

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Coupling Piezocatalysis and Photocatalysis in Bi₄NbO₈X (X = Cl, Br) Polar Single Crystals

Coupling Piezocatalysis and Photocatalysis in Bi₄NbO₈X (X = Cl, Br) Polar Single Crystals

Oxygen Reduction Reaction for Generating H₂O₂ through a Piezo‐Catalytic Process over Bismuth Oxychloride

Photocatalytic, piezocatalytic, and piezo‐photocatalytic effects in ferroelectric (Ba_0.875Ca_0.125)(Ti_0.95Sn_0.05)O₃ ceramics