Highly Polymerized Wine-Red Carbon Nitride to Enhance Photoelectrochemical Water Splitting Performance of Hematite

Tan, Haotian; Peng, Wei; Zhang, Tao; Han, Yonghuan; Si, Wenping; Liang, Ji; Hou, Feng

doi:10.1021/acs.jpcc.1c02342

Cited by 25 publications

(18 citation statements)

References 49 publications

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“…The Fourier transform RAMAN (FT-RAMAN) spectrum of PCN presented typical skeletal vibrations of carbon nitride heterocycle at 1200–1800, 980, and 700 cm −1 corresponding to the C-N stretching vibrations, symmetric N-breathing mode of heptazine unit, and in-plane bending vibration of the C-N=C linkage, respectively ( Figure S1 ). 24 , 25 The APCN and NPCN has shown identical peaks like that of PCN with more pronounced intensity. The NPCN catalyst disclosed a shoulder peak at 1208 cm −1 signifying a change in the carbon nitride framework ( Figure 1 D).…”

Section: Resultsmentioning

confidence: 92%

Accelerating NADH oxidation and hydrogen production with mid-gap states of nitrogen-rich carbon nitride photocatalyst

Bhoyar¹,

Kim²,

Abraham³

et al. 2022

iScience

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Section: Resultsmentioning

confidence: 92%

Accelerating NADH oxidation and hydrogen production with mid-gap states of nitrogen-rich carbon nitride photocatalyst

Bhoyar¹,

Kim²,

Abraham³

et al. 2022

iScience

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“…Graphitic carbon nitride (g‐C 3 N 4 ) is a very promising metal‐free semiconductor, and has been the subject of intensive investigation over the past decade due to its low cost, high stability and modest band gap (2.7 eV) which allows visible light photocatalytic activity. [ 97–101 ] Wang et al. synthesized porous C 3 N 4 decorated Cu‐ion‐implanted TiO 2 nanotube arrays (PCN/Cu‐TNA) for PEC water splitting.…”

Section: Self‐supported Heterostructured Nanoarrays For Photoelectroc...mentioning

confidence: 99%

Recent Advances in Self‐Supported Semiconductor Heterojunction Nanoarrays as Efficient Photoanodes for Photoelectrochemical Water Splitting

Liu

Luo

Mao

et al. 2022

Small

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Growth of semiconductor heterojunction nanoarrays directly on conductive substrates represents a promising strategy toward high‐performance photoelectrodes for photoelectrochemical (PEC) water splitting. By controlling the growth conditions, heterojunction nanoarrays with different morphologies and semiconductor components can be fabricated, resulting in greatly enhanced light‐absorption properties, stabilities, and PEC activities. Herein, recent progress in the development of self‐supported heterostructured semiconductor nanoarrays as efficient photoanode catalysts for water oxidation is reviewed. Synthetic methods for the fabrication of heterojunction nanoarrays with specific compositions and structures are first discussed, including templating methods, wet chemical syntheses, electrochemical approaches and chemical vapor deposition (CVD) methods. Then, various heterojunction nanoarrays that have been reported in recent years based on particular core semiconductor scaffolds (e.g., TiO2, ZnO, WO3, Fe2O3, etc.) are summarized, placing strong emphasis on the synergies generated at the interface between the semiconductor components that can favorably boost PEC water oxidation. Whilst strong progress has been made in recent years to enhance the visible‐light responsiveness, photon‐to‐O2 conversion efficiency and stability of photoanodes based on heterojunction nanoarrays, further advancements in all these areas are needed for PEC water splitting to gain any traction alongside photovoltaic‐electrochemical (PV‐EC) systems as a viable and cost‐effective route toward the hydrogen economy.

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“…The molten phase depends largely on the selection of precursors, which may alter the PCN film deposition route and influence the PCN properties such as the band gap structure, the degree of polymerization, and the crystallinity [16,[31][32][33][34]. Melamine sublimates at 335°C, melts at 354°C, and transforms into melem at 389°C [35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Integrated molten and vapor condensation of polymeric carbon nitride photoelectrode towards efficient water splitting

Wang

Tan

et al. 2022

Sci. China Mater.

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Polymeric carbon nitride (PCN) has received extensive attention in suspension photocatalysis, whereas the preparation of high-quality PCN film is still at an initial stage, limiting its practical application in photoelectrochemical (PEC) systems. Herein, an integrated molten and vapor condensation route is realized using small molecule precursors dicyandiamide (DCDA) and thiourea (TU) to form PCN film photoelectrode with high performance. The in-situ deposition route endows the PCN film with a composite structure including a thick porous zone with suitable thickness for light absorption and thin compact zone with a higher C/N ratio for better charge transportations. The growth of the specific film and the functions of precursors DCDA and TU are investigated in detail. Owing to the unique condensation route and film structure, this PCN film exhibits excellent performance in PEC water splitting with a photocurrent density of ca. 140 μA cm −2 in 0.1 mol L −1 NaOH electrolyte at 1.23V RHE , which is competitive or higher than the results of the reported PCN photoanodes prepared by the molten-mediated method and thermal vapor condensation. The integrated molten and vapor condensation strategy is enlightening for comprehending the growth of PCN photoelectrodes.

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Highly Polymerized Wine-Red Carbon Nitride to Enhance Photoelectrochemical Water Splitting Performance of Hematite

Cited by 25 publications

References 49 publications

Accelerating NADH oxidation and hydrogen production with mid-gap states of nitrogen-rich carbon nitride photocatalyst

Accelerating NADH oxidation and hydrogen production with mid-gap states of nitrogen-rich carbon nitride photocatalyst

Recent Advances in Self‐Supported Semiconductor Heterojunction Nanoarrays as Efficient Photoanodes for Photoelectrochemical Water Splitting

Integrated molten and vapor condensation of polymeric carbon nitride photoelectrode towards efficient water splitting

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