Synthesis of Au@nitrogen-doped carbon quantum dots@Pt core-shell structure nanoparticles for enhanced methanol electrooxidation

2019 ◽  
Vol 793 ◽  
pp. 635-645 ◽  
Author(s):  
Sen Sun ◽  
Yan Wang ◽  
Li'na Wang ◽  
Tong Guo ◽  
Xiaorong Yuan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Shell Structure ◽  
Carbon Quantum Dots ◽  
Methanol Electrooxidation ◽  
Core Shell ◽  
Nitrogen Doped ◽  
Core Shell Structure ◽  
Nitrogen Doped Carbon

scholarly journals A turn-on fluorescent sensor based on coffee-grounds carbon dots for the detection of sodium cyclamate

2021 ◽  
Author(s):  
Junzhe Chen ◽  
Haiying Du ◽  
Yifeng Xu ◽  
Boyu Ma ◽  
Zhihong Zheng ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Quantum Dots ◽  
Shell Structure ◽  
Sulfamic Acid ◽  
Carbon Quantum Dots ◽  
Core Shell ◽  
Hydroxyl Groups ◽  
Coffee Grounds ◽  
Core Shell Structure ◽  
Sodium Cyclamate

Abstract Carbon quantum dots (CQDs) were synthesized by coffee-grounds as carbon source under hydrothermal carbonization treatment for the first time. The obtained CQDs showed a strong emission at the wavelength of 460 nm, with an optimum excitation of 370 nm, and enrichment of the surface functional groups(-OH, -NH2). Sodium cyclamate in an aqueous solution and the CQDs could form a core-shell structure by hydrogen-bonding and van der waals bonding to enhance the fluorescent emission. Cyclohexyl sulfamate forms cyclohexyl sulfamate in an aqueous solution and then undergoes dehydration and condensation with the hydroxyl groups on the carbon quantum dots, and finally sodium cyclamate forms a core-shell structure around the carbon quantum dots.环己基氨基磺酸盐在水溶液中形成环己基氨基磺酸盐，然后与碳量子点上的羟基进行脱水和缩合，最后环甜酸钠在碳量子点周围形成核-壳结构。Cyclohexyl sulfamate form a cyclohexyl sulfamic acid in an aqueous solution followed by dehydration condensation with hydroxyl groups on the carbon quantum dots, cyclamate final core-shell structure is formed in the peripheral carbon quantum dot,

Core-shell structure of porous silicon with nitrogen-doped carbon layer for lithium-ion batteries

2018 ◽  
Vol 108 ◽  
pp. 170-175 ◽  
Author(s):  
Yan Xing ◽  
Liyuan Zhang ◽  
Songke Mao ◽  
Xiuli Wang ◽  
Hongyan Wenren ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Lithium Ion Batteries ◽  
Shell Structure ◽  
Lithium Ion ◽  
Carbon Layer ◽  
Core Shell ◽  
Nitrogen Doped ◽  
Core Shell Structure ◽  
Nitrogen Doped Carbon
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