Cooperative Coupling of H2O2 Production and Organic Synthesis over a Floatable Polystyrene‐Sphere‐Supported TiO2/Bi2O3 S‐Scheme Photocatalyst

He, Bowen; Wang, Zhongliao; Xiao, Peng; Chen, Tao; Wang, Yuanyuan; Zhang, Liuyang

doi:10.1002/adma.202203225

Cited by 208 publications

(96 citation statements)

References 59 publications

(63 reference statements)

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“…A more systematic fs-TAS study of electron transfer in the TiO 2 /Bi 2 O 3 S -scheme heterojunction is conducted by He et al 95 The fs-TAS measurements were performed on TiO 2 (TO) and TiO 2 /Bi 2 O 3 with optimal photocatalytic performance (TBO40). In the fs-TAS spectra of TO and TBO40 (Fig.…”

Section: Applications Of Fs-tas In Hpsmentioning

confidence: 99%

Femtosecond transient absorption spectroscopy investigation into the electron transfer mechanism in photocatalysis

et al. 2023

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Section: Applications Of Fs-tas In Hpsmentioning

confidence: 99%

Femtosecond transient absorption spectroscopy investigation into the electron transfer mechanism in photocatalysis

et al. 2023

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“…While the oxidative half-reactions are involved in contaminants photodegradation, sterilization, and NO removal. Some pioneering overall photocatalytic redox reactions by coupling the oxidation and reduction half-reaction have been developed, such as overall water photodecomposing 97 , photocatalytic H2 production coupled with organic oxidation 25 , photocatalytic CO2 reduction coupled with organic oxidation 62 , photocatalytic H2O2 production coupled with organic oxidation 63 , photocatalytic N2 reduction coupled with N2 oxidation 64 , photocatalytic organic reduction coupled with organic oxidation and others 81 . Designing high-efficient overall photocatalytic redox reactions need to endow the photocatalysts with strong redox capability, wide light harvesting, and accelerated charge separation 98,99 .…”

Section: Categories and Design Considerations Of Photocatalytic Overa...mentioning

confidence: 99%

“…He et al fabricated highly crystalline TiO2 in situ anchored on polystyrene (PS) spheres by a hydrothermal method (Fig. 12a) 63 . Photoreduction under the condition of ethylene glycol illumination immobilized Bi2O3 on lightweight PS spheres to promote the growth of Bi nanoparticles.…”

Section: Photocatalytic H2o2 Production Coupled With Organic Oxidationmentioning

confidence: 99%

“…To elevate solar utilization efficiency and squeeze the cost of photocatalysis, some ingenious researchers integrate reductive half-reaction with oxidative half-reaction to accomplish the overall utilization of photoexcited charges, such as photocatalytic H2 evolution coupled with organic transformation 25 , CO2 photoreduction coupled with organic synthesis 62 , photocatalytic H2O2 production coupled with organic oxidation 63 , photocatalytic N2 reduction coupled with N2 oxidation 64 and photocatalytic organic reduction coupled with an organic oxidation reaction 65 . Back in 2014, Chen and his coworkers achieved an overall redox reaction by coupling photocatalytic aromatic alcohols oxidation with photocatalytic nitrobenzene reduction 66 .…”

Section: Introductionmentioning

confidence: 99%

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Overall Utilization of Photoexcited Charges for Simultaneous Photocatalytic Redox Reactions

Wang¹,

Wang²,

Zhang³

et al. 2022

Acta Physico Chimica Sinica

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The photoconversion of CO2 to carbon-containing fuels, splitting water into H2, selective organic synthesis, reduction of N2 to NH3, and hazardous organic contaminant degradation represent feasible schemes for solving environmental and energy issues. In 1972, TiO2 was applied for decomposing water into H2 and O2 via photocatalysis. Owing to its the low visible-light utilization, fast charge recombination, and high energy barrier for water oxidation, overall photocatalytic water-splitting efficiency is extremely low. Because H2 is more economically valuable than O2, sacrificial agent-assisted photocatalytic H2 evolution has been extensively investigated. Because the sacrificial agent can quickly consume photoexcited holes and effectively reduce the water oxidation energy barrier, photocatalytic H2 evolution efficiency can be increased by 3-4 orders of magnitude compared to photocatalytic water splitting. However, the overuse of sacrificial agents contributes to wasted photoexcited holes and expensive processes, while presenting potential environmental issues. Recently, overall charge utilization and improved redox efficiency have been achieved by coupling photocatalytic reduction with oxidation reactions. Moreover, overall charge utilization can boost charge separation and increase photocatalyst durability. However, the photocatalytic mechanism of the overall redox reactions remains unclear, owing to the complex reaction processes and design difficulties. Herein, the basic principles of photocatalysis are discussed from the perspective of light harvesting, photoexcited charge separation, thermodynamics, and redox reaction kinetics. Photocatalytic redox reactions, including overall water photodecomposition, photocatalytic H2 evolution coupled with organic oxidation, photocatalytic CO2 reduction coupled with organic oxidation, photocatalytic H2O2 production coupled with organic oxidation, photocatalytic N2 reduction coupled with N2 oxidation, and photocatalytic organic reduction coupled with organic oxidation, can be systematically classified according to the coupling of photocatalytic oxidation reactions with photocatalytic reduction reactions. Subsequently, the design of photocatalytic redox reactions is considered in terms of the modulation of photocatalyst materials, reaction conditions, and diversity of reactants and products. In addition, the vital role of density functional theory (DFT) calculations for unveiling photoexcited charge transfer, rate-determining steps, and redox reaction barriers are discussed in the context of the work function, electron density difference, Bader charge, and variation in the intermediate adsorption free energy profiles. The activity and mechanism of various photocatalytic redox reactions were elaborately analyzed through in situ characterizations and DFT calculations using representative cases. Finally, the overall photocatalytic redox reactions were summarized with a focus on the construction of an S-scheme heterojunction photocatalyst, reasonable loading of cocatalysts, photo...

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“…In addition, most of the irradiation light sources used in current researches are coupled by multiple wavelengths, which limits the study of changes in binding energy at specific wavelengths. [ 29 , 30 , 31 , 32 ] Since semiconductors behave differently in response to dissimilar wavelength light, it is essential to explore the photogenerated electrons transport behavior of semiconductors at different wavelengths. Similarly, the photocatalysts for specific conditions can be better designed through researching the binding energy changes of semiconductor at specific wavelengths.…”

Section: Introductionmentioning

confidence: 99%

Detecting and Quantifying Wavelength‐Dependent Electrons Transfer in Heterostructure Catalyst via In Situ Irradiation XPS

Wang

Zhang

et al. 2022

Advanced Science

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The identity of charge transfer process at the heterogeneous interface plays an important role in improving the stability, activity, and selectivity of heterojunction catalysts. And, in situ irradiation X-ray photoelectron spectroscopy (XPS) coupled with UV light optical fiber measurement setup is developed to monitor and observe the photoelectron transfer process between heterojunction. However, the in-depth relationship of binding energy and irradiation light wavelength is missing based on the fact that the incident light is formed by coupling light with different wavelengths. Furthermore, a quantitative understanding of the charge transfer numbers and binding energy remains elusive. Herein, based on the g-C 3 N 4 /SnO 2 model catalyst, a wavelength-dependent Boltzmann function to describe the changes of binding energy and wavelength through utilizing a continuously adjustable monochromatic light irradiation XPS technique is established. Using this method, this study further reveals that the electrons transfer number can be readily calculated forming an asymptotic model. This methodology provides a blueprint for deep understanding of the charge-transfer rules in heterojunction and facilitates the future development of highly active advanced catalysts.

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Cooperative Coupling of H₂O₂ Production and Organic Synthesis over a Floatable Polystyrene‐Sphere‐Supported TiO₂/Bi₂O₃ S‐Scheme Photocatalyst

Abstract: Figure 7. a,b) Schematic illustrations of the O 2 flow supply for the photocatalyst in biphase (a) and triphase (b) systems for O 2 reduction and FFA oxidation.

Cited by 208 publications

References 59 publications

Femtosecond transient absorption spectroscopy investigation into the electron transfer mechanism in photocatalysis

Femtosecond transient absorption spectroscopy investigation into the electron transfer mechanism in photocatalysis

Overall Utilization of Photoexcited Charges for Simultaneous Photocatalytic Redox Reactions

Detecting and Quantifying Wavelength‐Dependent Electrons Transfer in Heterostructure Catalyst via In Situ Irradiation XPS

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