Single-crystal N-doped SiC nanochannel array photoanode for efficient photoelectrochemical water splitting

Chen, Shanliang; Zhao, Lianfu; Wang, Lin; Gao, Fengmei; Yang, Weiyou

doi:10.1039/c9tc00061e

Cited by 19 publications

(12 citation statements)

References 41 publications

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“…Among the families of semiconductors, SiC is considered one of the most important candidates of third-generation semiconductors, with excellent performance attributes such as robust stability against harsh working conditions, including high power, high pressure, high chemical corrosion, and high temperature, and its intrinsically nontoxic characteristic, , underscoring its unique application in optoelectronic devices. Especially, some recent works shed light on the PEC activity of SiC materials, including bulks, low-dimensional nanostructures, and composites, demonstrating their potential to be utilized as photoelectrodes for PEC water splitting. − In terms of the construction of a photoanode, the active materials to endow the PEC activities of most reported works were often preformed, followed by transfer to another current collector substrate. Such a process would inevitably cause the formation of interfaces between the active materials and the current collector, which is considered one of the main obstacles to reducing the PEC performance of the photoanodes.…”

Section: Introductionmentioning

confidence: 99%

Single-Crystal Integrated Photoanodes Based on 4H-SiC Nanohole Arrays for Boosting Photoelectrochemical Water Splitting Activity

Jiang

Gao

et al. 2020

ACS Appl. Mater. Interfaces

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Photoelectrochemical (PEC) splitting of water into H2 and O2 by direct use of sunlight is an ideal strategy for the production of clean and renewable energy, which fundamentally relies on the exploration of advanced photoanodes with high performance. In the present work, we report that single-crystal integrated photoanodes, that is, 4H-SiC nanohole arrays (active materials) and SiC wafer substrate (current collector), are established into a totally single-crystal configuration without interfaces, which was based on a two-step electrochemical etching process. The as-fabricated SiC photoanode showed a rather low onset potential of −0.016 V vs reversible hydrogen electrode (RHE) and a high photocurrent density of 3.20 mA/cm2 vs RHE 1.23 V, which were both superior to those of all reported SiC ones. Furthermore, such a rationally designed photoanode exhibited a fast photoresponse, wide photoresponse wavelength range, and long-term stability, representing its overall excellent PEC performance.

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Section: Introductionmentioning

confidence: 99%

Single-Crystal Integrated Photoanodes Based on 4H-SiC Nanohole Arrays for Boosting Photoelectrochemical Water Splitting Activity

Jiang

Gao

et al. 2020

ACS Appl. Mater. Interfaces

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“…Yang et al fabricated the photoanode of nanochannel array to apply photoelectrochemical (PEC) water splitting (Figure 11a). [92] Under illumination at 1.4 V versus Ag/AgCl simulated sunlight, the photoelectrode produced a high photocurrent of 2.41 mA cm 2 , which is superior to that of previously [82] Copyright 2020, John Wiley and Sons. d) Fabrication of WS 2 nanosheets.…”

Section: Applications Of Photoresponsive Nanochannels Membranesmentioning

confidence: 92%

“…Reproduced with permission. [ 92 ] Copyright 2019, Royal Society of Chemistry; b) schematic illustration of solar assisted salt concentration biased electricity generation through cation‐selective TPPS/Al 2 O 3 nanochannels membrane. Reproduced with permission.…”

Section: Applications Of Photoresponsive Nanochannels Membranesmentioning

confidence: 99%

Photoresponsive Solid Nanochannels Membranes: Design and Applications

Cheng

Zhang

Min

et al. 2021

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Biological channels have fundamental roles in the metabolism of organisms by precisely regulating the transport of molecules and ions, which is necessary to maintain the normal activity of the living body. [1,2] A typical example of biological channelrhodopsins that serve as sensory photoreceptors would function as a signal transmission medium. [1] Inspired by biological channels, scientists have built various artificial solid Light stimuli have notable advantages over other environmental stimuli, such as more precise spatial and temporal regulation, and the ability to serve as an energy source to power the system. In nature, photoresponsive nanochannels are important components of organisms, with examples including the rhodopsin channels in optic nerve cells and photoresponsive protein channels in the photosynthesis system of plants. Inspired by biological channels, scientists have constructed various photoresponsive, smart solidstate nanochannels membranes for a range of applications. In this review, the methods and applications of photosensitive nanochannels membranes are summarized. The authors believe that this review will inspire researchers to further develop multifunctional artificial nanochannels for applications in the fields of biosensors, stimuli-responsive smart devices, and nanofluidic devices, among others.

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“…Besides the applications mentioned above, the light-controlled solid-state nanopores and nanochannels can also be applied for other intriguing research fields, for example, the gas separation, [214][215][216] water splitting, [217] organic pollutant degradation, [218] drug delivery [219,220] and so on. Moreover, the electrochemical confinement effect [221] and quantum-confined superfluid effect that were proposed recently, [222,223] may provide new insights into the novel nanoconfined research for future applications in various fields.…”

Section: Energy Conversionmentioning

confidence: 99%

Light‐Controlled Ionic/Molecular Transport through Solid‐State Nanopores and Nanochannels

Jiang

et al. 2022

Chemistry An Asian Journal

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Biological nanochannels perfectly operate in organisms and exquisitely control mass transmembrane transport for complex life process. Inspired by biological nanochannels, plenty of intelligent artificial solid‐state nanopores and nanochannels are constructed based on various materials and methods with the development of nanotechnology. Specially, the light‐controlled nanopores/nanochannels have attracted much attention due to the unique advantages in terms of that ion and molecular transport can be regulated remotely, spatially and temporally. According to the structure and function of biological ion channels, light‐controlled solid‐state nanopores/nanochannels can be divided into light‐regulated ion channels with ion gating and ion rectification functions, and light‐driven ion pumps with active ion transport property. In this review, we present a systematic overview of light‐controlled ion channels and ion pumps according to the photo‐responsive components in the system. Then, the related applications of solid‐state nanopores/nanochannels for molecular sensing, water purification and energy conversion are discussed. Finally, a brief conclusion and short outlook are offered for future development of the nanopore/nanochannel field.

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Single-crystal N-doped SiC nanochannel array photoanode for efficient photoelectrochemical water splitting

Abstract: We investigated the photoelectrochemical water splitting of N-doped 4H-SiC nanochannel array photoanode with high photocurrent density and fast photoresponse.

Cited by 19 publications

References 41 publications

Single-Crystal Integrated Photoanodes Based on 4H-SiC Nanohole Arrays for Boosting Photoelectrochemical Water Splitting Activity

Single-Crystal Integrated Photoanodes Based on 4H-SiC Nanohole Arrays for Boosting Photoelectrochemical Water Splitting Activity

Photoresponsive Solid Nanochannels Membranes: Design and Applications

Light‐Controlled Ionic/Molecular Transport through Solid‐State Nanopores and Nanochannels

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