Control over relaxor, piezo-photocatalytic and energy storage properties in Na0.5Bi0.5TiO3 via processing methodologies

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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“…Other similar materials such as Na 0.5 Bi 0.5 TiO 3 and perovskite‐like Bi 4 Ti 3 O 12 are also used in piezo‐photonics. [ 104,105 ]…”

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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“…46 This E g value is very close to the previously reported values of bulk NBTO. 47,48 The optical properties demonstrate that the NBTO sample is a wide band gap semiconductor and almost can not response to visible light. The piezo-/ photocatalytic performances of the NBTO sample were evaluated by the degradation of RhB solution under different reaction conditions: (i) visible light irradiation, (ii) ultrasonic vibration, and (iii) both ultrasonic vibration and visible light irradiation.…”

Section: Optical Properties Piezo-/photocatalytic Performancementioning

confidence: 99%

Enhanced piezo-photocatalytic performance by piezoelectric and visible light photoexcitation coupling through piezoelectric Na_0.5Bi_0.5TiO₃ micron crystals

Zhang

et al. 2020

RSC Adv.

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“…5)13) Furthermore, recent reports show a combination of piezocatalysis 14), 15) and photocatalysis improves the catalytic performance when mechanical vibration and light irradi-ation are simultaneously subjected to piezoelectric materials. 16), 17) The catalytic activity is affected by not only the presence of spontaneous polarization but also magnitude, orientation and microstructure of domain. 18)22) Introduction of a porous structure in piezoelectric materials is an effectual way to promote the orientation of domain and to increase magnitude of out-of-plane polarization.…”

Section: Introductionmentioning

confidence: 99%

Ferroelectric domain formation and photocatalytic activity on porous alkali niobate piezoelectric ceramics

Fuchigami

Sumiya

Kakimoto

2021

J. Ceram. Soc. Japan

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Present study showed synthesis of novel type of porous alkali niobate piezoelectric ceramics, and the formation of domains and photocatalytic activity for the porous piezoelectric ceramics were investigated while comparing with dense ceramics to confirm enhancement of domain orientation and photocatalytic activity around pores. Porous Li 0.06 Na 0.47 K 0.47 NbO 3 piezoelectric ceramics were synthesized by a template method using polymethylmethacrylate as a pore former agent. Uniform pores with 6¯m in diameter were dispersed in the porous ceramics. Porous ceramics synthesized with 10 vol % of the pore former agent showed piezoelectric voltage coefficient, 29 mVm/N, which is same as that of the dense ceramics. Smaller striped domains formed at an edge of pores on the porous ceramics, indicating that orientation of domains was promoted by electric field concentration around the pores. Through photoreduction reaction of Ag + ion, local precipitation of Ag was shown around the pores on the poled porous ceramics, whereas Ag was located over an entire surface of unpoled porous ceramics. Highest photocatalytic activity was shown for the poled porous ceramics in photodecomposition test of methylene blue. These results clearly indicated photocatalytic activity was enhanced on ferroelectric domains around pores of porous piezoelectric ceramics.

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Control over relaxor, piezo-photocatalytic and energy storage properties in Na0.5Bi0.5TiO3 via processing methodologies

Cited by 46 publications

References 87 publications

Advances in Piezo‐Phototronic Effect Enhanced Photocatalysis and Photoelectrocatalysis

Advances in Piezo‐Phototronic Effect Enhanced Photocatalysis and Photoelectrocatalysis

Enhanced piezo-photocatalytic performance by piezoelectric and visible light photoexcitation coupling through piezoelectric Na_0.5Bi_0.5TiO₃ micron crystals

Ferroelectric domain formation and photocatalytic activity on porous alkali niobate piezoelectric ceramics

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Control over relaxor, piezo-photocatalytic and energy storage properties in Na0.5Bi0.5TiO3 via processing methodologies

Cited by 46 publications

References 87 publications

Advances in Piezo‐Phototronic Effect Enhanced Photocatalysis and Photoelectrocatalysis

Advances in Piezo‐Phototronic Effect Enhanced Photocatalysis and Photoelectrocatalysis

Enhanced piezo-photocatalytic performance by piezoelectric and visible light photoexcitation coupling through piezoelectric Na0.5Bi0.5TiO3 micron crystals

Ferroelectric domain formation and photocatalytic activity on porous alkali niobate piezoelectric ceramics

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Enhanced piezo-photocatalytic performance by piezoelectric and visible light photoexcitation coupling through piezoelectric Na_0.5Bi_0.5TiO₃ micron crystals