纳米碳修饰氮化碳改进光催化制氢

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem Pub Date : 2025-05-01 DOI:10.1016/j.flatc.2025.100876

María F. Vega, Elvira Díaz-Faes, Carmen Barriocanal

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引用次数: 0

摘要

以双氰胺和NH4Cl冻干溶液为原料制备了缺陷改性氮化碳（CN）。制备了缺陷改性CN与碳材料的纳米复合材料，克服了CN的一些缺点，提高了光催化水裂解制氢的效率。对所制备的光催化剂进行了孔隙度、结晶度、电化学、化学组成和光吸收等方面的表征。NH4Cl的加入使其表面积增加，活性位点也相应增加。复合材料N-D-CN/1QD-D表现出最佳的电荷分离效率，减少了电子-空穴对的重组，提高了电荷密度，降低了电荷转移势垒，H2产量是原始CN的3.6倍。

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Nanocarbon modified carbon nitride for improved photocatalytic H2 production

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Nanocarbon modified carbon nitride for improved photocatalytic H2 production

Defect modified carbon nitride (CN) was prepared from a freeze-dried solution of dicyandiamide and NH₄Cl. Nanocomposites of the defect modified CN and carbon materials were prepared to overcome some of the disadvantages of CN and enhance photocatalytic H₂ production from water splitting. The photocatalysts were thoroughly characterized including porosity, crystallinity, electrochemistry, chemical composition and optical absorption. Inclusion of NH₄Cl produced an increase in surface area with a corresponding increase in active sites. The composite N-D-CN/1QD-D demonstrated the best charge separation efficiency and reduced recombination of the electron-hole pairs, in addition to improved charge density and a reduced charge transfer barrier, which was reflected in H₂ production 3.6 times greater than from pristine CN.

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来源期刊

FlatChem Multiple-

CiteScore

8.40

自引率

6.50%

发文量

104

审稿时长

26 days

期刊介绍： FlatChem - Chemistry of Flat Materials, a new voice in the community, publishes original and significant, cutting-edge research related to the chemistry of graphene and related 2D & layered materials. The overall aim of the journal is to combine the chemistry and applications of these materials, where the submission of communications, full papers, and concepts should contain chemistry in a materials context, which can be both experimental and/or theoretical. In addition to original research articles, FlatChem also offers reviews, minireviews, highlights and perspectives on the future of this research area with the scientific leaders in fields related to Flat Materials. Topics of interest include, but are not limited to, the following: -Design, synthesis, applications and investigation of graphene, graphene related materials and other 2D & layered materials (for example Silicene, Germanene, Phosphorene, MXenes, Boron nitride, Transition metal dichalcogenides) -Characterization of these materials using all forms of spectroscopy and microscopy techniques -Chemical modification or functionalization and dispersion of these materials, as well as interactions with other materials -Exploring the surface chemistry of these materials for applications in: Sensors or detectors in electrochemical/Lab on a Chip devices, Composite materials, Membranes, Environment technology, Catalysis for energy storage and conversion (for example fuel cells, supercapacitors, batteries, hydrogen storage), Biomedical technology (drug delivery, biosensing, bioimaging)