Microwave-assisted molten-salt rapid synthesis of isotype triazine-/heptazine based g-C3N4 heterojunctions with highly enhanced photocatalytic hydrogen evolution performance

Liu, Huanhuan; Chen, Deliang; Wang, Zhiqiang; Jing, Huijuan; Zhang, Rui

doi:10.1016/j.apcatb.2016.10.014

Cited by 347 publications

(170 citation statements)

References 66 publications

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“…6b, potassium is present only in the sample after illumination in the acidified K 2 SO 4 electrolyte. The peaks at 293.1 and 295.9 eV are assignable to K 2p of K + [36]. The presence of potassium ions and change of Mo oxidation state confirm the formation of molybdenum bronze.…”

Section: Photoelectrochemical Properties and Photointercalated Materimentioning

confidence: 87%

Photoinduced K+ Intercalation into MoO3/FTO Photoanode—the Impact on the Photoelectrochemical Performance

et al. 2019

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In this work, thin layers of MoO 3 were tested as potential photoanodes for water splitting. The influence of photointercalation of alkali metal cation (K +) into the MoO 3 structure on the photoelectrochemical properties of the molybdenum trioxide films was investigated for the first time. MoO 3 thin films were synthesized via thermal annealing of thin, metallic Mo films deposited onto the FTO substrate using a magnetron sputtering system. The Tauc and Mott-Schottky plots analysis were performed in order to determine the energy bands position of the investigated material. The photointercalation effect of K + on photoelectrochemical properties of FTO/MoO 3 photoanodes was studied using electrochemical techniques performed under simulated solar light illumination. It was proven that pristine MoO 3 layers cannot act as effective photoanodes for water splitting due to the utilization of the photoexcited electrons in the intercalation process. The photochromic phenomenon related to Mo 6+ centers reduction, and K + intercalation occurs at a potential range in which the photoanode exhibits photoelectrochemical activity towards water photooxidation.

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Section: Photoelectrochemical Properties and Photointercalated Materimentioning

confidence: 87%

Photoinduced K+ Intercalation into MoO3/FTO Photoanode—the Impact on the Photoelectrochemical Performance

et al. 2019

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“…[42] Thea s-prepared sample exhibited high activity towards photocatalytic hydrogen evolution. [42] Thea s-prepared sample exhibited high activity towards photocatalytic hydrogen evolution.…”

Section: Triazine/heptazine-based Ccnsmentioning

confidence: 95%

“…Taking into account the different properties of the subunits in the CN framework, it is possible to construct at riazine/heptazine-based CCN with heterojunctions and an internal donor-acceptor (D-A) heterostructure,which would accelerate interfacial charge transfer and improve the photocatalytic activity.L iu and co-workers obtained at riazine/ heptazine-based CCN heterojunction upon microwave-assisted heating of melamine in KCl/LiCl salts at 550 8 8Cf or 30 min. [42] Thea s-prepared sample exhibited high activity towards photocatalytic hydrogen evolution. Theh igh photoactivity was ascribed to the unique triazine/heptazine heterojunction, which provided an efficient pathway for the trans-port and separation of photogenerated electron-hole pairs (Figure 16 a).…”

Section: Triazine/heptazine-based Ccnsmentioning

confidence: 95%

Crystalline Carbon Nitride Semiconductors for Photocatalytic Water Splitting

2019

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Conjugated carbon nitride (CN) is an emerging and promising semiconductor photocatalyst for water photolysis owing to its unique properties. However, the traditional thermally induced polymerization of N‐containing precursors typically produces melon‐based CN solids with amorphous or semi‐crystalline structures with only moderate photocatalytic performance. Many strategies have been developed to prepare crystalline CNs (CCNs), such as high‐temperature and high‐pressure routes, ionothermal synthesis, and microwave‐assisted synthesis. In this Minireview, we summarize the progress that has been made in the synthesis of CCNs and their application in photocatalytic water splitting reactions. Three kinds of CCNs are mainly discussed according to their polymeric subunits. Challenges associated with CCNs and their future development are also included.

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“…Therefore, the temperature of the reaction does not significantly affect the morphology of La-Mn-O crystals in KNO 3 -NaNO 3 -NaNO 2 melt. In molten salt system, crystal of the particles grows up through the mass transfer process in liquid phase [25] . The precursors MnCl 2 and LaCl 3 have certain solubility in KNO 3 -NaNO 3 -NaNO 2 ternary molten salt, therefore the solute phase grows at a relatively lower temperature than its melting point [26] .…”

Section: Preparation and Electrochemical Behavior Measurement Of Lamnmentioning

confidence: 99%

Molten salt synthesis and supercapacitor properties of oxygen-vacancy LaMnO3−

Song

Zi-chang

Yan

et al. 2020

Journal of Energy Chemistry

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Microwave-assisted molten-salt rapid synthesis of isotype triazine-/heptazine based g-C3N4 heterojunctions with highly enhanced photocatalytic hydrogen evolution performance

Cited by 347 publications

References 66 publications

Photoinduced K+ Intercalation into MoO3/FTO Photoanode—the Impact on the Photoelectrochemical Performance

Photoinduced K+ Intercalation into MoO3/FTO Photoanode—the Impact on the Photoelectrochemical Performance

Crystalline Carbon Nitride Semiconductors for Photocatalytic Water Splitting

Molten salt synthesis and supercapacitor properties of oxygen-vacancy LaMnO3−

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