3D graphene aerogel-supported copper azide nanoparticles as primary explosive with excellent initiation performance

2021 ◽  
pp. 2140016
Author(s):  
Lei Zhang ◽  
Jianhua Chen ◽  
Dongxiao Fu ◽  
Feipeng Lu ◽  
Yanlan Wang ◽  
...  
Keyword(s):  
Ignition Time ◽  
Three Dimensional ◽  
High Energy ◽  
Input Energy ◽  
Graphene Aerogel ◽  
3D Graphene ◽  
Ignition Voltage ◽  
Gas Ignition ◽  
Thermal Stability Of

Copper azide (CA), a high energy primary explosive, had been investigated with various supporter materials to reduce its sensitivity characteristics. However, effective supporter had not been designed to fully reduce CAs sensitivity characteristics. Hence, we presented a three-dimensional (3D) graphene aerogel-supported CA (CA-GAs) strategy to meet those needs. CA-GAs was prepared using 3D GA as the framework to uniformly grip CA. The SEM and XRD measurements revealed that CA nanoparticles were fully dispersed on GAs, the in-situ azidation reaction of Cu precursor and CAs crystalline structure were not affected by GAs. DSC further verified the thermal stability of CA-GAs. Moreover, electrostatic ignition experiment was employed to investigate CA-GAs’ ignition time, input energy, and electrical ignition performance. Those results showed that CA-GAs could be reliably detonated by a 3.5 [Formula: see text] SCB, the average electric ignition voltage, ignition time, and input energy of CA-GAs were 19.125 V, 21 [Formula: see text]s, and 0.56 mJ, respectively. All these results illustrated that GAs was an effective supporter for the stabilization of CA.

Graphene aerogel-supported and graphene quantum dots-modified γ-MnOOH nanotubes as a highly efficient electrocatalyst for oxygen reduction reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (49) ◽  
pp. 43116-43126 ◽  
Author(s):  
Yisi Liu ◽  
Wenzhang Li ◽  
Jie Li ◽  
Haibo Shen ◽  
Yaomin Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Graphene Quantum Dots ◽  
Three Dimensional ◽  
Reduction Reaction ◽  
Graphene Aerogel ◽  
3D Graphene ◽  
Highly Efficient

In this work, we demonstrate a facile strategy to synthesize a novel three-dimensional (3D) graphene aerogel-supported and graphene quantum dots-modified γ-MnOOH nanotubes as a highly efficient electrocatalyst.

Three-Dimensional Graphene/MnO2 Nanowalls Hybrid for High-Efficiency Electrochemical Supercapacitors

NANO ◽  
2018 ◽  
Vol 13 (01) ◽  
pp. 1850013 ◽  
Author(s):  
Chuanyin Xiong ◽  
Tiehu Li ◽  
Tingkai Zhao ◽  
Alei Dang ◽  
Xianglin Ji ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Specific Capacitance ◽  
High Efficiency ◽  
Hydrogen Reduction ◽  
Three Dimensional ◽  
High Specific Capacitance ◽  
High Energy ◽  
High Energy Density ◽  
Energy Storage Devices ◽  
3D Graphene

In this paper, a facile method is designed to fabricate three-dimensional (3D) graphene (GR)/manganese dioxide (MnO2) nanowall electrode material. The 3D GR/MnO2 hybrid is prepared by a combination of electrochemical deposition (ELD) and electrophoresis deposition (EPD), followed by thermal reduction (TR). Firstly, the 3D graphene oxide (GO)/MnO2 hybrid is obtained by the ELD–EPD method. Secondly, the 3D GR/MnO2 hybrid is obtained through hydrogen reduction at a certain temperature. The as-fabricated hybrid has been characterized by scanning electron microscope (SEM), transmission electron microscope (TEM) and Raman spectroscopy. The electrochemical properties have been also measured by cyclic voltammetry. The results showed that the 3D GR/MnO2 nanowalls hybrid has a high specific capacitance of 266.75[Formula: see text]Fg[Formula: see text] and a high energy density of 25.36[Formula: see text]Whkg[Formula: see text]. Moreover, a high specific capacitance (240.15[Formula: see text]Fg[Formula: see text]) at a high scan rate of 200[Formula: see text]mVs[Formula: see text] (90% capacity retention) has been also obtained. Additionally, the hybrid can serve directly as the electrodes of supercapacitor without adding binder. This work provides a novel road to fabricate a binder-free 3D GR-based hybrid for high-performance energy storage devices.

scholarly journals A solvothermal strategy: one-step in situ synthesis of self-assembled 3D graphene-based composites with enhanced lithium storage capacity

2014 ◽  
Vol 2 (24) ◽  
pp. 9200-9207 ◽  
Author(s):  
Jingjing Ma ◽  
Jiulin Wang ◽  
Yu-Shi He ◽  
Xiao-Zhen Liao ◽  
Jun Chen ◽  
...  
Keyword(s):  
Storage Capacity ◽  
Three Dimensional ◽  
In Situ Synthesis ◽  
Li Ion Batteries ◽  
Lithium Storage ◽  
3D Graphene ◽  
One Step ◽  
Li Ion ◽  
Self Assembled

A facile and controllable solvothermal strategy has been developed to synthesize three-dimensional graphene-based monoliths for Li-ion batteries.

Thermal Stability of Retained Austenite in Low Alloyed TRIP-Steel Determined by High Energy Synchrotron Radiation

2013 ◽  
Vol 772 ◽  
pp. 129-133
Author(s):  
Stefan Brauser ◽  
Arne Kromm ◽  
Eitan Dabah ◽  
Thomas Kannengiesser ◽  
Michael Rethmeier
Keyword(s):  
Synchrotron Radiation ◽  
High Energy ◽  
Heating Process ◽  
Austenitic Phase ◽  
Trip Steels ◽  
The Stability ◽  
In Situ Diffraction ◽  
Kinetics Of ◽  
Thermal Stability Of

TRIP-steels offer a good combination between strength and ductility. Therefore TRIP-steels are widely used in the automobile industries. The aim of this work is to study the stability of involved phases during heating and to identify the kinetics of the occuring phase transformations. For that purpose, in-situ diffraction measurements, using high energy synchrotron radiation were conducted. The analysis revealed the decomposition of the metastable austenitic phase into carbide and ferrite along the heating process and the regeneration of the austenite by further heating of the sample.

Electrodeposition of polyaniline on three-dimensional graphene hydrogel as a binder-free supercapacitor electrode with high power and energy densities

RSC Advances ◽  
2016 ◽  
Vol 6 (64) ◽  
pp. 58854-58861 ◽  
Author(s):  
Shuya Gao ◽  
Li Zhang ◽  
Yadong Qiao ◽  
Pei Dong ◽  
Jun Shi ◽  
...  
Keyword(s):  
High Power ◽  
Three Dimensional ◽  
High Energy ◽  
Supercapacitor Electrode ◽  
3D Graphene ◽  
Binder Free ◽  
Power And Energy ◽  
Power Densities

3D graphene hydrogel (GH) provides a promising support for electrodepositing PANI, and the supercapacitor based on GH/PANI conformal heterostructure displays high energy and power densities.

scholarly journals Determination of six organophosphorus pesticides in water samples by three-dimensional graphene aerogel-based solid-phase extraction combined with gas chromatography/mass spectrometry

RSC Advances ◽  
2018 ◽  
Vol 8 (19) ◽  
pp. 10277-10283 ◽  
Author(s):  
P. Sun ◽  
Y. L. Gao ◽  
C. Xu ◽  
Y. F. Lian
Keyword(s):  
Solid Phase ◽  
Organophosphorus Pesticides ◽  
Chemical Reduction ◽  
Three Dimensional ◽  
Gas Chromatography Mass Spectrometry ◽  
Graphene Aerogel ◽  
3D Graphene ◽  
Pesticides In Water ◽  
Drying Treatment

3D graphene aerogel fabricated via chemical reduction followed by freeze-drying treatment was used as SPE sorbent to extract OPPs from water sample.

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