K–I co-doped crystalline carbon nitride with outstanding visible light photocatalytic activity for H2 evolution

Cui, Yanjuan; Li, Xue; Yang, Chuanfeng; Xiao, Beibei; Xu, Hongyun

doi:10.1016/j.ijhydene.2022.02.005

Cited by 12 publications

(3 citation statements)

References 52 publications

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“…At present, the molten salt method has become one of the overriding means to synthesize cyano‐rich g‐C 3 N 4 . Currently, the main method used is to mix two or more alkali metal salts (KCl/LiCl (most), KCl/LiBr, NaCl/LiCl, LiI/KI, LiBr/KBr, KCl/KSCN, KCl/KOCN, LiCl/KSCN, KI/LiI, KCl/NaCl/LiCl) with the precursors (melamine, urea, dicyandiamide, CH 5 N 3 ·HCl, guanidine hydrochloride, NH 4 SCN, carbohydrazide) or synthetic intermediate or original carbon nitride uniformly, [ 33,40,49,56–81 ] and then heat them in a tube furnace (Air, Ar or N 2 ) or muffle furnace to a certain temperature (450–650 °C) to react for a period of time, and then wash off the salts with hot water, and finally obtain the sample by drying. In this process, alkali metal salts can play the role of a class of template agent, speed up the reaction rate, make the sample more homogeneous, improve the crystallinity of the sample, etc.…”

Section: Creation Of Cyano‐rich G‐c3n4mentioning

confidence: 99%

Cyano‐Rich g‐C₃N₄ in Photochemistry: Design, Applications, and Prospects

Jing,

Xu,

Xie

et al. 2023

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Cyano‐rich g‐C3N4 materials are widely used in various fields of photochemistry due to the very powerful electron‐absorbing ability and electron storage function of cyano, as well as its advantages in improving light absorption, adjusting the energy band structure, increasing the polarization rate and electron density in the structure, active site concentration, and promoting oxygen activation ability. Notwithstanding, there is yet a huge knowledge break in the design, preparation, detection, application, and prospect of cyano‐rich g‐C3N4. Accordingly, an overall review is arranged to substantially comprehend the research progress and position of cyano‐rich g‐C3N4 materials. An overall overview of the current research position in the synthesis, characterization (determination of their location and quantity), application, and reaction mechanism analysis of cyano‐rich g‐C3N4 materials to provide a quantity of novel suggestions for cyano‐modified carbon nitride materials' construction is provided. In view of the prevailing challenges and outlooks of cyano‐rich g‐C3N4 materials, this paper will purify the growth direction of cyano‐rich g‐C3N4, to achieve a more in‐depth exploration and broaden the applications of cyano‐rich g‐C3N4.

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Section: Creation Of Cyano‐rich G‐c3n4mentioning

confidence: 99%

Cyano‐Rich g‐C₃N₄ in Photochemistry: Design, Applications, and Prospects

Jing,

Xu,

Xie

et al. 2023

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“…[35][36][37][38] In recent years, huge efforts have been made via elemental doping through molten-salt mediation. [39][40][41] Chen et al 42 developed homogeneous boron-doped crystalline g-C 3 N 4 nanocrystals by means of thermal polycondensation of melamine and boron oxide (B 2 O 3 ) in the presence of LiCl, NaCl, and KCl to degrade methyl orange (MO) solution under visible-light irradiation. In the high temperature of a liquid-molten-salt environment, a combination of B 2 O 3 with melamine could achieve full contact and full reaction to make the polymerization more efficient and uniform doping of boron element.…”

Section: Elemental Dopingmentioning

confidence: 99%

Effect of molten-salt modulation on the composition and structure of g-C₃N₄-based photocatalysts

He¹,

Hu²,

Zhong³

et al. 2023

Chem. Commun.

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“…Furthermore, elements doping is a simple and effective way to enhance the photon-to-electron conversion rate. To date, non-metallic elements such as C [14] , N [15] , O [16] , P [17] , S [18] , B [15] , F [19] , I [20] and metal elements, such as Fe [21] , Co [22] , Ni [23] , Zn [24] , Mn [25] , have been investigated, and great progresses also have been achieved. Amongst, O-doping is an economic and effective measure, which can be obtained by direct calcination in air.…”

Section: Introductionmentioning

confidence: 99%

Oxygen-doped Carbon Nitride Nanocages with Efficient Photon-to-Electron Conversion for Selective Oxidation of Xylose/Xylan to Yield Xylonic Acid

Zhang¹,

Xie²,

Ali³

et al. 2023

Paper and Biomaterials

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Highly efficient photon-to-electron conversion is crucial for achieving photocatalytic conversion. In this study, oxygen-doped carbon nitride nanocages (O@CNNCs) were engineered via dual strategies of morphology-controlled heteroatom doping, which was successfully used in the photocatalytic selective oxidation of xylose/xylan to xylonic acid. The nanocage-shaped O@CNNCs had a larger surface area, which was 4.02 times of carbon nitride (CN). Furthermore, with the assistance of morphology regulation and O-doping, O@CNNCs exhibit highly efficient photon-to-electron conversion, enhanced visible-light utilization, high photocurrent, low resistance, and fast separation/ migration of electron-hole pairs. Correspondingly, the photocatalytic oxidation of xylose to xylonic acid using O@CNNCs was successfully achieved under mild reaction conditions with a yield of 83.4%. O@CNNCs have excellent recyclability, in which the yield of xylonic acid in the 5th cycle was 98.2% of its initial use. The O@CNNC photocatalytic system was also suitable for macromolecular xylan, and a xylonic acid yield of 77.34 mg was obtained when 100 mg xylan was used. The oxidation-active species captured experiments indicated that holes were crucial for the selective oxidation of xylose to xylonic acid. Overall, this study provides a new strategy for the preparation of photocatalysts with excellent photon-to-electron conversion and selective oxidation of biomass-derived feedstocks to xylonic acid.

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K–I co-doped crystalline carbon nitride with outstanding visible light photocatalytic activity for H2 evolution

Cited by 12 publications

References 52 publications

Cyano‐Rich g‐C₃N₄ in Photochemistry: Design, Applications, and Prospects

Cyano‐Rich g‐C₃N₄ in Photochemistry: Design, Applications, and Prospects

Effect of molten-salt modulation on the composition and structure of g-C₃N₄-based photocatalysts

Oxygen-doped Carbon Nitride Nanocages with Efficient Photon-to-Electron Conversion for Selective Oxidation of Xylose/Xylan to Yield Xylonic Acid

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K–I co-doped crystalline carbon nitride with outstanding visible light photocatalytic activity for H2 evolution

Cited by 12 publications

References 52 publications

Cyano‐Rich g‐C3N4 in Photochemistry: Design, Applications, and Prospects

Cyano‐Rich g‐C3N4 in Photochemistry: Design, Applications, and Prospects

Effect of molten-salt modulation on the composition and structure of g-C3N4-based photocatalysts

Oxygen-doped Carbon Nitride Nanocages with Efficient Photon-to-Electron Conversion for Selective Oxidation of Xylose/Xylan to Yield Xylonic Acid

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Product

Resources

About

Cyano‐Rich g‐C₃N₄ in Photochemistry: Design, Applications, and Prospects

Cyano‐Rich g‐C₃N₄ in Photochemistry: Design, Applications, and Prospects

Effect of molten-salt modulation on the composition and structure of g-C₃N₄-based photocatalysts