Supporting Cu@In2O3 Core-Shell Structure on N-Doped Graphitic Carbon Cuboctahedra Cages for Efficient Photocatalytic Homo-Coupling of Terminal Alkynes

Improving the separation efficiency of photogenerated carriers and exposing more active sites are two important factors to improve photocatalytic efficiency of photocatalyst. Designing appropriate materials with special structure and composition...

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Manipulation of 2D carbon nanoplates with a core–shell structure for high-performance potassium-ion batteries

Journal of Materials Chemistry A ◽

10.1039/c9ta04663a ◽

2019 ◽

Vol 7 (34) ◽

pp. 19929-19938 ◽

Cited By ~ 11

Author(s):

Dongjun Li ◽

Xiaolong Cheng ◽

Rui Xu ◽

Ying Wu ◽

Xuefeng Zhou ◽

...

Keyword(s):

Amorphous Carbon ◽

Shell Structure ◽

High Performance ◽

Potassium Ion ◽

Graphitic Carbon ◽

Core Shell ◽

Core Shell Structure

Quasi-2D core–shell amorphous carbon/graphitic carbon nanoplates (AC@GC) are designed, and they exhibit synergistic properties that enable the construction of superior K-ion batteries.

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Core/Shell Structure of Mesoporous Carbon Spheres and g-C3N4 for Acid Red 18 Decolorization

Catalysts ◽

10.3390/catal9121007 ◽

2019 ◽

Vol 9 (12) ◽

pp. 1007

Author(s):

Martyna Baca ◽

Małgorzata Aleksandrzak ◽

Ewa Mijowska ◽

Ryszard J. Kaleńczuk ◽

Beata Zielińska

Keyword(s):

Shell Structure ◽

Mesoporous Carbon ◽

Carbon Nitride ◽

Graphitic Carbon ◽

Light Irradiation ◽

Graphitic Carbon Nitride ◽

Solar Light ◽

Core Shell ◽

Solar Light Irradiation ◽

Core Shell Structure

Spherical photocatalyst based on ordered mesoporous carbon and graphitic carbon nitride with core/shell structure (CS/GCN) was successfully synthesized via facile electrostatic self-assembly strategy. The photocatalytic properties of the hybrid were evaluated by the decomposition of Acid Red 18 under simulated solar light irradiation in comparison to the bulk graphitic carbon nitride (GCN). The results clearly revealed that coupling of carbon nitride with mesoporous carbon allows the catalyst to form with superior photocatalytic performance. The photoactivity of CS/GCN was over nine times higher than that of pristine GCN. Introducing mesoporous carbon into GCN induced higher surface area of the heterojunction and also facilitated the contact surface between the two phases. The synergistic effect between those two components enhanced the visible light-harvesting efficiency and improved photoinduced charge carrier generation, and consequently their proper separation. The electrochemical behavior of the obtained composite was also evaluated by electrochemical impedance, transient photocurrent response and linear sweep potentiometry measurements. The results confirmed that transport and separation of charge carriers in the hybrid was enhanced in comparison to the reference bulk graphitic carbon nitride. Detailed electrochemical, photoluminescence and radical scavenger tests enabled determination of the possible mechanism of photocatalytic process. This work presents new insights to design a core/shell hybrid through the simple preparation process, which can be successfully used as an efficient photocatalyst for the treatment of wastewater containing dyes under solar light irradiation.

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Enhancement of Photocatalytic Activity under Visible Light Irradiation via the AgI@TCNQ Core-Shell Structure

Materials ◽

10.3390/ma12101679 ◽

2019 ◽

Vol 12 (10) ◽

pp. 1679 ◽

Cited By ~ 3

Author(s):

Wanli Xie ◽

Li Liu ◽

Wenquan Cui ◽

Weijia An

Keyword(s):

Shell Structure ◽

Active Sites ◽

Photocatalytic Performance ◽

Degradation Process ◽

Charge Carriers ◽

Core Shell ◽

Transport Channel ◽

Surface Active ◽

Core Shell Structure ◽

Unique Core

In this paper, a AgI@TCNQ photocatalyst with a core-shell structure was reported. A two-dimensional TCNQ (7,7,8,8-Tetracyanoquinodimethane) nanosheet, with a π-π conjugate structure, was used as a shell layer to realize the flexible coating on the surface of AgI nanoparticles. These special core-shell structure composites solve the key problems of the small interface of the bulk composites and the lesser charge transfer paths, which could accelerate the migration of photogenerated carriers. Thus, the AgI@TCNQ photocatalysts showed the better photodegradation performance for the methylene blue (MB) solution, and the degradation rate of AgI@TCNQ (1 wt.%) composite was 1.8 times than AgI under irradiation. The reactive species trapping experiments demonstrated that ·O2−, h+, and ·OH all participated in the MB degradation process. The photocatalytic mechanism of AgI@TCNQ composites could be rationally explained by considering the Z-scheme structure, resulting in a higher redox potential and more efficient separation of charge carriers. At the same time, the unique core-shell structure provides a larger contact area, expands the charge transport channel, and increases the surface active sites, which are beneficial for improving photocatalytic performance.

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Eu-Doped Zeolitic Imidazolate Framework-8 Modified Mixed-Crystal TiO2 for Efficient Removal of Basic Fuchsin from Effluent

Materials ◽

10.3390/ma14237265 ◽

2021 ◽

Vol 14 (23) ◽

pp. 7265

Author(s):

Wanqi Zhang ◽

Hui Liu ◽

Zhechen Liu ◽

Yuhong An ◽

Yuan Zhong ◽

...

Keyword(s):

Electron Microscopy ◽

Shell Structure ◽

Mixed Crystal ◽

Synthesis Method ◽

Core Shell ◽

Photocatalytic Efficiency ◽

Basic Fuchsin ◽

Zeolitic Imidazolate Framework ◽

X Ray ◽

Core Shell Structure

Zeolitic imidazolate framework-8 (ZIF-8) was doped with a rare-earth metal, Eu, using a solvent synthesis method evenly on the surface of a mixed-crystal TiO2(Mc-TiO2) structure in order to produce a core–shell structure composite ZIF-8(Eu)@Mc-TiO2 adsorption photocatalyst with good adsorption and photocatalytic properties. The characterisation of ZIF-8(Eu)@Mc-TiO2 was performed via X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller analysis (BET) and ultraviolet–visible light differential reflectance spectroscopy (UV-DRs). The results indicated that Eu-doped ZIF-8 was formed evenly on the Mc-TiO2 surface, a core–shell structure formed and the light-response range was enhanced greatly. The ZIF-8(Eu)@Mc-TiO2 for basic fuchsin was investigated to validate its photocatalytic performance. The effect of the Eu doping amount, basic fuchsin concentration and photocatalyst dosage on the photocatalytic efficiency were investigated. The results revealed that, when 5%-Eu-doped ZIF-8(Eu)@Mc-TiO2 (20 mg) was combined with 30 mg/L basic fuchsin (100 mL) under UV irradiation for 1 h, the photocatalytic efficiency could reach 99%. Further, it exhibited a good recycling performance. Thus, it shows certain advantages in its degradation rate and repeatability compared with previously reported materials. All of these factors suggested that, in an aqueous medium, ZIF-8(Eu)@Mc-TiO2 is an eco-friendly, sustainable and efficient material for the photocatalytic degradation of basic fuchsin.

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A low-cost cementite (Fe3C) nanocrystal@N-doped graphitic carbon electrocatalyst for efficient oxygen reduction

Physical Chemistry Chemical Physics ◽

10.1039/c5cp04252f ◽

2015 ◽

Vol 17 (41) ◽

pp. 27527-27533 ◽

Cited By ~ 19

Author(s):

Tianxing Wu ◽

Haimin Zhang ◽

Xian Zhang ◽

Yunxia Zhang ◽

Huijun Zhao ◽

...

Keyword(s):

Oxygen Reduction Reaction ◽

Oxygen Reduction ◽

Surface Area ◽

Shell Structure ◽

Low Cost ◽

Reduction Reaction ◽

Graphitic Carbon ◽

Large Surface Area ◽

Core Shell ◽

Core Shell Structure

A core–shell structure Fe3C nanocrystal@N-doped graphitic carbon (Fe3C@NGC) nanocomposite was successfully fabricated, and used as an electrocatalyst with large surface area, exhibiting great potential for oxygen reduction reaction (ORR).

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