Time-resolved infrared spectroscopic investigation of Ga2O3 photocatalysts loaded with Cr2O3-Rh cocatalysts for photocatalytic water splitting

Ding, Qian; Chen, Tao; Li, Zheng; Feng, Zhaochi; Wang, Xiuli

doi:10.1016/s1872-2067(20)63688-9

Cited by 13 publications

(11 citation statements)

References 55 publications

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“…[42,43] More impressively, after incorporation of Cr 2 O 3 layer, the Rh-Cr 2 O 3 /AlGaN sample showed further reduction in PL intensity and faster PL decay (2.32 ns) in comparison with the Rh/AlGaN sample, implying that the Cr 2 O 3 layer also plays a vital role in facilitating carrier separation and transfer. [44,45] Additionally, the PL peaks of three samples were located at the same wavelength of 291 nm, suggesting that co-catalyst modification has not changed the optoelectronic property of AlGaN nanowires for sustainable solar-blind photodetection.…”

Section: Insights Into the Synergetic Effectmentioning

confidence: 93%

Achieving Record High External Quantum Efficiency >86.7% in Solar‐Blind Photoelectrochemical Photodetection

Liu

Wang

Shao

et al. 2022

Adv Funct Materials

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Controlling interfacial and surface carrier dynamics associated with nanostructured semiconductors is the key to achieving outperforming electrical and optical characteristics in photoelectrochemical (PEC) devices. A strategy for surface renovation by loading a co-catalyst (functional nanoparticles or layers) can unambiguously empower the device with superior surface property. In this work, a PEC-type solar-blind photodetector based on widebandgap p-AlGaN nanowires is reported on which Rh-Cr 2 O 3 hybrid structures are rationally loaded. Impressively, the external quantum efficiency of the devices is strikingly boosted from 28.8% to 86.7%, while a record-high responsivity of 178.3 mA W −1 is achieved, exhibiting one of the highest values among PEC photodetectors. Both experimental insights and theoretical modeling reveal that the initial decoration of Rh nanoparticles facilitate the interfacial carrier transfer and separation while optimizing the hydrogen adsorption energy. After subsequent incorporation of the amorphous Cr 2 O 3 layer, which acts as a molecular sieve, not only can the side reaction over Rh be effectively suppressed, but also the interfacial carrier dynamics and surface chemical reactivity are further boosted, thus contributing to more favorable PEC processes. The work offers a unique synergetic strategy to optimize the surface property of semiconductors for boosting photoresponse performance in aqueous environments for future bio-or chemicalrelated sensing applications.

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Section: Insights Into the Synergetic Effectmentioning

confidence: 93%

Achieving Record High External Quantum Efficiency >86.7% in Solar‐Blind Photoelectrochemical Photodetection

Liu

Wang

Shao

et al. 2022

Adv Funct Materials

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“…The catalytic activity of Ga 2 O 3 nanostructures with different crystal phases has been comparatively studied and the result indicates that the efficiency is in the order of γ‐Ga 2 O 3 > α‐Ga 2 O 3 > β‐Ga 2 O 3 ( Figure a). [ 134 ] The ultrawide bandgap of 4.9 V limits the sensing wavelength of irradiation and the catalyst activity. Various methods have been exploited by tuning band edges to enhance the features (quantum yield, sensing wavelength, etc.)…”

Section: Advances In the Representative Applications Of 1d β‐Ga2o3 Na...mentioning

confidence: 99%

mentioning

confidence: 99%

New Generation Beta‐Gallium Oxide Nanomaterials: Growth and Performances in Electronic Devices

Zhou

2023

Adv Eng Mater

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In the last decade, beta‐gallium oxide (β‐Ga2O3) has been the subject of extensive research and has rapidly developed as a material for ultra‐wide bandgap semiconductors. One‐dimensional (1D) β‐Ga2O3 nanostructures have advantages over bulk β‐Ga2O3, including a high‐specific surface area, sensitivity, and the quantum confinement effect. These advantages are favorable to developing various applications such as power electronics with improved heat dissipation effect, high detectivity photodetectors, and high sensitivity gas sensors. These nanostructures can be fabricated through top‐down or bottom‐up methods and have been utilized in various shapes, such as nanowires, nanobelts, nanorods, nanotubes, or networks, in various electronic devices. This review summarizes the recent developments in 1D β‐Ga2O3 nanostructures, focusing on growth methodologies and mechanisms. In detail, the growth methodologies of 1D β‐Ga2O3 are summarized based on four categories: vapor–liquid–solid, vapor–solid, solution–solid, and template mechanisms. Ten growth techniques regarding different fabrication mechanisms are reviewed and the corresponding applications such as gas sensors, UV photodetectors, resistive random access memories, and photocatalysts are summarized. This review provides material design strategies for developing next‐generation optoelectronic or electronic products by summarizing the properties and fabrication methods of 1D β‐Ga2O3.

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“…Ag, Pt and Ru nanoparticles have been reported to be effective co-catalysts to improve the photocatalytic hydrogen production performance of Ga 2 O 3 . 26,27 Some non-noble-metal materials, such as MoS 2 , 28,29 CoP, 30–32 NiO x 33 etc. , could replace noble metals to be used as co-catalysts for increasing its photocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Self-assembly of Ni₂P/γ-Ga₂O₃ nanosheets for efficient photocatalytic water splitting hydrogen production

et al. 2022

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Time-resolved infrared spectroscopic investigation of Ga2O3 photocatalysts loaded with Cr2O3-Rh cocatalysts for photocatalytic water splitting

Cited by 13 publications

References 55 publications

Achieving Record High External Quantum Efficiency >86.7% in Solar‐Blind Photoelectrochemical Photodetection

Achieving Record High External Quantum Efficiency >86.7% in Solar‐Blind Photoelectrochemical Photodetection

New Generation Beta‐Gallium Oxide Nanomaterials: Growth and Performances in Electronic Devices

Self-assembly of Ni₂P/γ-Ga₂O₃ nanosheets for efficient photocatalytic water splitting hydrogen production

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Time-resolved infrared spectroscopic investigation of Ga2O3 photocatalysts loaded with Cr2O3-Rh cocatalysts for photocatalytic water splitting

Cited by 13 publications

References 55 publications

Achieving Record High External Quantum Efficiency >86.7% in Solar‐Blind Photoelectrochemical Photodetection

Achieving Record High External Quantum Efficiency >86.7% in Solar‐Blind Photoelectrochemical Photodetection

New Generation Beta‐Gallium Oxide Nanomaterials: Growth and Performances in Electronic Devices

Self-assembly of Ni2P/γ-Ga2O3 nanosheets for efficient photocatalytic water splitting hydrogen production

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Self-assembly of Ni₂P/γ-Ga₂O₃ nanosheets for efficient photocatalytic water splitting hydrogen production