Examination of photocatalytic Z-scheme system for overall water splitting with its electronic structure

Tani, Tadaaki; Yamaguchi, Yuichi; Nishimi, Taisei; Uchida, Takayuki; Kudo, Akihiko

doi:10.1039/d3cp00241a

Cited by 6 publications

(2 citation statements)

References 58 publications

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“…Hydrogen energy is considered to be one of the most promising energy sources in the future, and the green and sustainable photoelectrochemical (PEC) water splitting reaction has received extensive attention from researchers. − However, the gas generated in the PEC water splitting reaction will accumulate on the electrode surface, and gas bubbles will be formed when the gas concentration exceeds the nucleation threshold. The formed gas bubbles are easily adhered to the electrode surface for a long time, which will affect the contact between the electrode and the electrolyte if not removed in time, leading to an increase in the reaction overpotential and thus reducing the reaction efficiency. , Therefore, the use of various measures to avoid the prolonged retention of air bubbles on the electrode surface is of great research value.…”

Section: Introductionmentioning

confidence: 99%

Study on Bubble Dynamics in Photoelectrochemical Water Splitting with Low-Rate Flow Fields

Ye,

Xu,

Nie

et al. 2023

J. Phys. Chem. C

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In this study, we explored the effect of the flow rate on bubble dynamics in photoelectrochemical water splitting using a low-rate rotating flow field. With the flow rate increasing from 0 to 8.4 mm s −1 , the bubble life cycle and the bubble detachment diameter both decrease. However, the mass flow rate of the gas entering the bubble through the "direct injection" mode is not affected by the variation in the flow rate. Different from static conditions, increasing laser power in the flow field will cause the bubble life cycle to first increase and then decrease. In addition, the difference in the dissolved oxygen concentration between the reaction position and the bulk of the liquid phase can be reduced to at most about 1/10 of that under static conditions, which makes it easier for the bubbles to detach. Calculations show that the Marangoni force rather than the lift force remains the important factor affecting bubble departure in a low-rate flow field.

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Section: Introductionmentioning

confidence: 99%

Study on Bubble Dynamics in Photoelectrochemical Water Splitting with Low-Rate Flow Fields

Ye,

Xu,

Nie

et al. 2023

J. Phys. Chem. C

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“…The Z-scheme mechanism enables the transfer of photogenerated electrons and holes between the semiconductors, preventing recombination and improving the efficiency of photocatalytic reactions. This design strategy has been successfully applied in various photocatalytic systems, such as CO 2 reduction, water splitting, and pollutant degradation [3][4][5][6][7].…”

Section: Graphical Abstract 1 Introductionmentioning

confidence: 99%

Enhancing NO degradation in visible light through plasma-treated photocatalytic substrates featuring TiO2@g-C3N4 Z-scheme structure

Luu,

Pham,

Wang

et al. 2023

Environmental Engineering Research

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In this study, a novel approach is introduced involving grafting and dip coating on photocatalytic substrates to create a Z-Scheme structure of TiO2@g-C3N4 (TC). The synthesized photocatalyst undergoes comprehensive characterization through techniques such as XRD, SEM, XPS, FTIR, Contact Angle Goniometer, and BET analysis. Two configurations, TC coated on PVDF membrane (TC-PVDF) and TC coated on Film (TC-Film), are evaluated for the photodegradation of NOx under visible light. Compared to the benchmark material TiO2, TC-PVDF nanoparticles demonstrate outstanding performance, boasting a specific surface area of 60.93 m2/g and minimal toxic NO2 byproducts, with concentration as low as 3.54 ppb, constituting only 0.46% during NOx remediation. These nanoparticles exhibit remarkable stability, with less than a 10% decrease in efficiency after 5 cycles of visible light irradiation. Plasma treatment transforms TC-PVDF from superhydrophobic to hydrophilic, with a contact angle reduction from 124.7° to 0°. Notably, TC-PVDF shows substantial efficiency enhancements, reaching 84.04%. This study broadens insights into catalytic bag filters, providing practical implications for their use in NOx removal. It offers innovative solutions for air purification, addressing environmental challenges and advancing sustainable technologies.

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Interface engineering of Z-scheme heterojunction for photocatalytic water splitting

Zhao,

Yang,

Binas

et al. 2024

Fundamental Research

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Examination of photocatalytic Z-scheme system for overall water splitting with its electronic structure

Abstract: Although the solar-to-hydrogen (STH) conversion efficiency of photocatalytic Z-scheme system for overall water-splitting with solid-state electron mediator composed of hydrogen evolution cocatalyst (HEC) nanoparticles/ hydrogen evolution photocatalyst (HEP) particle layer...

Cited by 6 publications

References 58 publications

Study on Bubble Dynamics in Photoelectrochemical Water Splitting with Low-Rate Flow Fields

Study on Bubble Dynamics in Photoelectrochemical Water Splitting with Low-Rate Flow Fields

Enhancing NO degradation in visible light through plasma-treated photocatalytic substrates featuring TiO<sub>2</sub>@g-C<sub>3</sub>N<sub>4</sub> Z-scheme structure

Interface engineering of Z-scheme heterojunction for photocatalytic water splitting

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