Core@shell structured Au@SnO2 nanoparticles with improved N2 adsorption/activation and electrical conductivity for efficient N2 fixation

By evenly mixing polytetrafluoroethylene-silicon energetic materials (PTFE-Si EMs) with tin oxide (SnO2) particles, we demonstrate a direct synthesis of graphene-encapsulated SnO2 (Gr-SnO2) nanoparticles through the self-propagated exothermic reaction of the EMs. The highly exothermic reaction of the PTFE-Si EMs released a huge amount of heat that induced an instantaneous temperature rise at the reaction zone, and the rapid expansion of the gaseous SiF4 product provided a high-speed gas flow for dispersing the molten particles into finer nanoscale particles. Furthermore, the reaction of the PTFE-NPs with Si resulted in a simultaneous synthesis of graphene that encapsulated the SnO2 nanoparticles in order to form the core-shell nanostructure. As sodium storage material, the graphene-encapsulated SnO2 nanoparticles exhibit a good cycling performance, superior rate capability, and a high initial Coulombic efficiency of 85.3%. This proves the effectiveness of our approach for the scalable synthesis of core-shell-structured graphene-encapsulated nanomaterials.

Download Full-text

Structure and properties of polymer core-shell systems: Helium ion microscopy and electrical conductivity studies

Journal of Vacuum Science & Technology B Nanotechnology and Microelectronics Materials Processing Measurement and Phenomena ◽

10.1116/1.3504589 ◽

2010 ◽

Vol 28 (6) ◽

pp. C6P59-C6P65 ◽

Cited By ~ 3

Author(s):

Valery Bliznyuk ◽

Alexander Pud ◽

Larry Scipioni ◽

Chuong Huynh ◽

Nikolay Ogurtsov ◽

...

Keyword(s):

Electrical Conductivity ◽

Core Shell ◽

Structure And Properties ◽

Helium Ion ◽

Ion Microscopy

Download Full-text

Largely enhanced electrical properties of polymer composites via the combined effect of volume exclusion and synergy

RSC Advances ◽

10.1039/c6ra10129a ◽

2016 ◽

Vol 6 (57) ◽

pp. 51900-51907 ◽

Cited By ~ 5

Author(s):

Kai Wu ◽

Linyu Wu ◽

Weixing Yang ◽

Songgang Chai ◽

Feng Chen ◽

...

Keyword(s):

Electrical Conductivity ◽

Electrical Properties ◽

Synergistic Effect ◽

Core Shell ◽

Shielding Effectiveness ◽

Emi Shielding ◽

The Core ◽

Emi Shielding Effectiveness ◽

Core Shell Structure ◽

Exclusion Effect

The core–shell structure of surface conductive SiO2@rGO could result in enhanced electrical conductivity and EMI shielding effectiveness as due to both synergistic effect and volume exclusion effect.

Download Full-text

Effect of the electrical conductivity of core solutions on the morphology and structure of core–shell CA-PCL/CS nanofibers

New Journal of Chemistry ◽

10.1039/c7nj02805a ◽

2017 ◽

Vol 41 (24) ◽

pp. 15072-15078 ◽

Cited By ~ 5

Author(s):

Lihua Wang ◽

Huan Yang ◽

Jiazi Hou ◽

Wanxi Zhang ◽

Chunhui Xiang ◽

...

Keyword(s):

Electrical Conductivity ◽

Core Shell ◽

Electrical Conductivities ◽

Morphology And Structure

CA-PCL/CS nanofibers with controllable core to shell ratios were prepared by altering the electrical conductivities of core solutions.

Download Full-text

Controlled Synthesis of Fe3O4/Ag Core–Shell Composite Nanoparticles with High Electrical Conductivity

Journal of Electronic Materials ◽

10.1007/s11664-011-1800-0 ◽

2011 ◽

Vol 41 (3) ◽

pp. 519-523 ◽

Cited By ~ 26

Author(s):

Youyi Sun ◽

Ye Tian ◽

Minghong He ◽

Qing Zhao ◽

Chuang Chen ◽

...

Keyword(s):

Electrical Conductivity ◽

Composite Nanoparticles ◽

Core Shell ◽

Controlled Synthesis ◽

High Electrical Conductivity ◽

Shell Composite

Download Full-text

Nitrogen-Doped Carbon Encapsulated Partial Zinc Stannate Nanocomposite for High-Performance Energy Storage Materials

Frontiers in Chemistry ◽

10.3389/fchem.2021.769186 ◽

2021 ◽

Vol 9 ◽

Author(s):

Jiage Yu ◽

Zhijie Liu ◽

Xian Zhang ◽

Yu Ding ◽

Zhengbing Fu ◽

...

Keyword(s):

Electrical Conductivity ◽

Energy Storage ◽

Volume Expansion ◽

High Performance ◽

Energy Storage Materials ◽

Core Shell ◽

Zinc Stannate ◽

Nitrogen Doped ◽

Storage Materials ◽

Nitrogen Doped Carbon

As a bimetal oxide, partial zinc stannate (ZnSnO3) is one of the most promising next-generation lithium anode materials, which has the advantages of low operating voltage, large theoretical capacity (1,317 mA h g−1), and low cost. However, the shortcomings of large volume expansion and poor electrical conductivity hinder its practical application. The core-shell ZnSnO3@ nitrogen-doped carbon (ZSO@NC) nanocomposite was successfully obtained by coating ZnSnO3 with polypyrrole (PPy) through in situ polymerization under ice-bath conditions. Benefiting from this unique compact structure, the shell formed by PPy cannot only effectively alleviate the volume expansion effect of ZnSnO3 but also enhance the electrical conductivity, thus, greatly improving the lithium storage performance. ZSO@NC can deliver a reversible capacity of 967 mA h g−1 at 0.1 A g−1 after 300 cycles and 365 mA h g−1 at 2 A g−1 after 1,000 cycles. This work may provide a new avenue for the synthesis of bimetal oxide with a core–shell structure for high-performance energy storage materials.

Download Full-text