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

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1679 ◽  
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.

The influence of ZnO loading amount on the photocatalytic performance of Fe3O4@SiO2@ZnO–Ag composites toward the degradation of organic pollutants and hydrogen evolution

2021 ◽  
Author(s):  
Jian Wang ◽  
Junlin Zhong ◽  
Jinghai Yang ◽  
Xin Qu ◽  
Yukai Zhang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Organic Pollutants ◽  
Shell Structure ◽  
Photocatalytic Performance ◽  
Core Shell ◽  
Photocatalytic Ability ◽  
Core Shell Structure ◽  
Loading Amount

Magnetically reusable Fe3O4@SiO2@ZnO-Ag with well-designed core-shell structure, controllable ZnO loading amount and excellent photocatalytic ability toward organic pollutants degradation and hydrogen evolution were synthesized.

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

2021 ◽  
Author(s):  
Yaya Yuan ◽  
Yaqun Wang ◽  
Gui-lin Zhuang ◽  
Fenglei Yang ◽  
Qiu-Yan Li ◽  
...  
Keyword(s):  
Shell Structure ◽  
Active Sites ◽  
Separation Efficiency ◽  
Graphitic Carbon ◽  
Special Structure ◽  
Core Shell ◽  
Terminal Alkynes ◽  
Photocatalytic Efficiency ◽  
Core Shell Structure

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...

scholarly journals Synthesis and structure of free-standing germanium quantum dots and their application in live cell imaging

RSC Advances ◽  
2015 ◽  
Vol 5 (26) ◽  
pp. 20566-20573 ◽  
Author(s):  
Ali Karatutlu ◽  
Mingying Song ◽  
Ann P. Wheeler ◽  
Osman Ersoy ◽  
William R. Little ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Shell Structure ◽  
Live Cell Imaging ◽  
Cell Imaging ◽  
Core Shell ◽  
Free Standing ◽  
Bio Imaging ◽  
Core Shell Structure ◽  
Germanium Quantum Dots ◽  
Unique Core

Colloidally synthesized free-standing Ge qdots with a unique core–shell structure were demonstrated to be a viable bio-imaging probe.

scholarly journals Improved Solar-Driven Photocatalytic Performance of Highly Crystalline Hydrogenated TiO2 Nanofibers with Core-Shell Structure

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Ming-Chung Wu ◽  
Ching-Hsiang Chen ◽  
Wei-Kang Huang ◽  
Kai-Chi Hsiao ◽  
Ting-Han Lin ◽  
...  
Keyword(s):  
Shell Structure ◽  
Photocatalytic Performance ◽  
Core Shell ◽  
Tio2 Nanofibers ◽  
Core Shell Structure

Enhanced catalytic activity of cobalt nanoparticles encapsulated with an N-doped porous carbon shell derived from hollow ZIF-8 for efficient synthesis of nitriles from primary alcohols in water

2019 ◽  
Vol 21 (16) ◽  
pp. 4334-4340 ◽  
Author(s):  
Kang-kang Sun ◽  
Jia-lin Sun ◽  
Guo-Ping Lu ◽  
Chun Cai
Keyword(s):  
Catalytic Activity ◽  
Shell Structure ◽  
Cobalt Catalyst ◽  
Cobalt Nanoparticles ◽  
Core Shell ◽  
Efficient Synthesis ◽  
Primary Alcohols ◽  
Mild Conditions ◽  
Core Shell Structure ◽  
Unique Core

A cobalt catalyst derived from a unique core–shell structure based on hollow ZIF-8 and ZIF-67 is prepared for the synthesis of nitriles from alcohols in water under mild conditions.

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