A highly sensitive hybridized soft piezophotocatalyst driven by gentle mechanical disturbances in water

Tong, Wangshu; Zhang, Yihe; Xiao, Ke; Shen, Yu; Zhou, Yan; Liu, Leipeng; Li, Haitao; Liu, Lei; Huang, Tao; Li, Min; Zhang, Qian; Du, Ruifeng; An, Qi

doi:10.1016/j.nanoen.2018.08.069

Cited by 99 publications

(52 citation statements)

References 34 publications

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“…Common approaches to creating piezopotential in photocatalytic and photoelectrocatalytic semiconductors include ultrasonic vibration, mechanical stirring, mechanical force, thermal expansion and some other methods, among which the former three are most widely adopted ( Figure 7 ). [ 26,34,37,46–49 ]…”

Section: General Approaches To Creating Piezopotentialmentioning

confidence: 99%

“…Alternatively, the mechanical‐stirring‐induced pressure of water can also lead to the bending of piezo material as well as related piezopotential (Figure 7c). [ 47,53 ] The flow of electrolyte by simple stirring can apply continuous piezoelectric field in one direction, and the stirring rate and direction can be easily tuned. [ 26 ] Previous reports have demonstrated that the stirring rate and direction have a great influence on water splitting activity.…”

Section: General Approaches To Creating Piezopotentialmentioning

confidence: 99%

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Advances in Piezo‐Phototronic Effect Enhanced Photocatalysis and Photoelectrocatalysis

Pan

Sun

Chen

et al. 2020

Advanced Energy Materials

361

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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Section: General Approaches To Creating Piezopotentialmentioning

confidence: 99%

Section: General Approaches To Creating Piezopotentialmentioning

confidence: 99%

Advances in Piezo‐Phototronic Effect Enhanced Photocatalysis and Photoelectrocatalysis

Pan

Sun

Chen

et al. 2020

Advanced Energy Materials

361

236

View full text Add to dashboard Cite

show abstract

“…As Figure a,b depict, all the X‐ray diffraction (XRD) peaks of the synthesized CdS located at 26.5°, 43.9°, and 51.7° index to cubic CdS, which are corresponding to the (111), (220), and (311) planes of CdS (JCPDS 80‐0019) 29,30. The peak at about 25.9° assigns to the (002) plane of CNT (JCPDS 08‐0415) 31.…”

Section: Figurementioning

confidence: 98%

“…In this process, the charge recombination is greatly restricted, the carrier migration rate is markedly accelerated and the carrier lifetime is efficiently prolonged, and therefore the hydrogen evolution activity is significantly boosted. On the other side, the energy band of CdS would respectively bending upwards and downwards at the ideal contact interfaces between the negative and positive pyroelectric potential surfaces of PVDF‐HFP substrate and CdS based on the piezo‐phototronic effect (Figure 5c),29 which would further prohibit the carrier recombination and result in robust photocatalytic hydrogen production activity.…”

Section: Figurementioning

confidence: 99%

Construction of Infrared‐Light‐Responsive Photoinduced Carriers Driver for Enhanced Photocatalytic Hydrogen Evolution

et al. 2020

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Infrared light, more than 50% of the solar light energy, is long‐termly ignored in the photocatalysis field due to its low photon energy. Herein, infrared‐light‐responsive photoinduced carriers driver is first constructed taking advantage of pyroelectric effect for enhancing photocatalytic hydrogen evolution. In order to give full play to its role, the photocatalytic reaction is localized on the surface and interface of the composite based on a new semi‐immersion type heat collected photocatalytic microfiber system. The system is consisted of distinctive pyroelectric substrate poly(vinylidene fluoride‐co‐hexafluropropylene (PVDF‐HFP), typical photothermal material carbon nanotube (CNT), and representative photocatalyst CdS. The transient photocurrent, electrochemical impedance spectroscopy, time‐resolved photoluminescence and pyroelectric potential characterizations indicate that the infrared‐light‐responsive carriers driver significantly promotes the photogenerated charge separation, accelerates carrier migration, and prolongs carrier lifetime. The photocatalytic hydrogen evolution efficiency is remarkably improved more than five times with the highest average apparent quantum yield of 16.9%. It may open up new horizons to photocatalytic technology for the more efficient use of infrared light.

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“…[40] Recently,o ur group designed as eries of composite films by hybridizing various photocatalysts (TiO 2 ,BiOI, or CdS) with af lexible porous piezoelectric polymeric film, rGO-F/PVDF-HFP (4-azidotetrafluorobenzoic acid modified graphene/ polyvinylidene fluoride-co-hexafluoropropylene), which can respond to gentle mechanical disturbances (magnetic stirring) as self-powered energy for piezoelectric catalysis for promoting photocatalytic activity (Figure 7d). [41] TheM Od ecomposition rate of TiO 2 @rGO-F/PVDF-HFP shows at hreefold increase over that of TiO2@Cotton (inert substrate), and 99 %d egradation efficiency is achieved within 60 minutes of…”

Section: Piezoelectric Polarization Promoted Surface Charge Separationmentioning

confidence: 98%

The Role of Polarization in Photocatalysis

et al. 2019

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Semiconductor photocatalysis as a desirable technology shows great potential in environmental remediation and renewable energy generation, but its efficiency is severely restricted by the rapid recombination of charge carriers in the bulk phase and on the surface of photocatalysts. Polarization has emerged as one of the most effective strategies for addressing the above‐mentioned issues, thus effectively promoting photocatalysis. This review summarizes the recent advances on improvements of photocatalytic activity by polarization‐promoted bulk and surface charge separation. Highlighted is the recent progress in charge separation advanced by different types of polarization, such as macroscopic polarization, piezoelectric polarization, ferroelectric polarization, and surface polarization, and the related mechanisms. Finally, the strategies and challenges for polarization enhancement to further enhance charge separation and photocatalysis are discussed.

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A highly sensitive hybridized soft piezophotocatalyst driven by gentle mechanical disturbances in water

Cited by 99 publications

References 34 publications

Advances in Piezo‐Phototronic Effect Enhanced Photocatalysis and Photoelectrocatalysis

Advances in Piezo‐Phototronic Effect Enhanced Photocatalysis and Photoelectrocatalysis

Construction of Infrared‐Light‐Responsive Photoinduced Carriers Driver for Enhanced Photocatalytic Hydrogen Evolution

The Role of Polarization in Photocatalysis

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