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Online since: November 2016
Authors: Priscilla Gloria Lorraine Baker, Siyabulela Hamnca, Lisebo Phelane, Emmanuel Iheanyichukwu Iwuoha
Electrochemical Transduction at Modified Boron Doped Diamond Interfaces
Lisebo Phelane, Siyabulela Hamnca, Priscilla Baker,
Emmanuel Iwuoha
SensorLab, Chemistry Department, University of the Western Cape, Robert Sobukwe Drive,
Bellville, 7535, Cape Town, South Africa
Email: lphelane@gmail.com, 3055982@myuwc.ac.za, pbaker@uwc.ac.za, eiwuoha@uwc.ac.za
Keywords: graphene oxide, boron-doped diamond, polysulfone, nanocomposite, transducer
Abstract.
Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR) and Raman spectroscopy were used to study the morphology and structure of the prepared materials.
The SEM image of GO (Fig.1) shows how the sheets are stacked together and laminar structures are formed.
Fig. 1, SEM image of graphene oxide Fig. 2, SEM image of polysulfone Fig. 3, SEM image of polysulfone-graphene oxide nanocomposite In pure PSF cast films (Fig. 2) the particle size diameter was observed to be average of 600 - 1000 nm range and formed repeating spherical structures.
Ajayan, New insights into the structure and reduction of graphite oxide.
Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR) and Raman spectroscopy were used to study the morphology and structure of the prepared materials.
The SEM image of GO (Fig.1) shows how the sheets are stacked together and laminar structures are formed.
Fig. 1, SEM image of graphene oxide Fig. 2, SEM image of polysulfone Fig. 3, SEM image of polysulfone-graphene oxide nanocomposite In pure PSF cast films (Fig. 2) the particle size diameter was observed to be average of 600 - 1000 nm range and formed repeating spherical structures.
Ajayan, New insights into the structure and reduction of graphite oxide.
Online since: April 2014
Authors: Hai Xia Hao, Si Yu Xu, Feng Qi Zhao, Hui Xiang Xu, Er Gang Yao, Rong Zu Hu
Combustion Characteristics of Composite Solid propellants
Containing Different Coated Aluminum nanopowders
YAO Er Gang a *, ZHAO Feng Qi b, XU Si Yu c, HU Rong Zu d, XU Hui Xiang e, and HAO Hai Xia f
Science and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Xi’an 710065, P.
In this way, the whole burning process of the propellant was recorded and the combustion wave structure from the condensed phase to gas phase was obtained ultimately. 2.
The burning flame of 11HT-3 and 11HT-4 samples is relatively concentrated, approximately cylindrical cone, and flame length is relatively longer, flame brightness is higher, and the flame structure is denser.
Combustion wave structure and flame temperature distribution A schematic representation of the combustion wave structure of a typical solid propellant is shown in Fig. 5.
Zhang, Combustion mechanism of double-base propellant containing nitrogen heterocyclic nitroamines (II): The temperature distribution of the flame and its chemical structure, Acta Astronaut. 64(2009) 602-614
In this way, the whole burning process of the propellant was recorded and the combustion wave structure from the condensed phase to gas phase was obtained ultimately. 2.
The burning flame of 11HT-3 and 11HT-4 samples is relatively concentrated, approximately cylindrical cone, and flame length is relatively longer, flame brightness is higher, and the flame structure is denser.
Combustion wave structure and flame temperature distribution A schematic representation of the combustion wave structure of a typical solid propellant is shown in Fig. 5.
Zhang, Combustion mechanism of double-base propellant containing nitrogen heterocyclic nitroamines (II): The temperature distribution of the flame and its chemical structure, Acta Astronaut. 64(2009) 602-614
Online since: March 2011
Authors: Qing Ge Feng, Shao You Liu
To further investigate the effect of calcined temperature on the textural structure of Co-TiO2 material, the typical experiments (Fig.2) were performanced.
The clear mesoporous structure (Fig.3a) and the partially crystallized pore walls (Fig.3b) can be easily observed.
Since mass transfer and mismatch charge of Co2+, Ti4+ and O2- ions lead to the presence of crystal defect structure.
Moreover, Raman spectra of pure TiO2 and Co-TiO2 are nearly the same, suggesting that they are of a similar crystal structure and the cobalt has been doped into the lattice of anatase TiO2.
On the other hand, the clear defect structures (seen in Fig.3) existed in the Co-TiO2 photocatalyst can capture photoexcited electrons and holes, lowering the quantum efficiency.
The clear mesoporous structure (Fig.3a) and the partially crystallized pore walls (Fig.3b) can be easily observed.
Since mass transfer and mismatch charge of Co2+, Ti4+ and O2- ions lead to the presence of crystal defect structure.
Moreover, Raman spectra of pure TiO2 and Co-TiO2 are nearly the same, suggesting that they are of a similar crystal structure and the cobalt has been doped into the lattice of anatase TiO2.
On the other hand, the clear defect structures (seen in Fig.3) existed in the Co-TiO2 photocatalyst can capture photoexcited electrons and holes, lowering the quantum efficiency.
Online since: August 2012
Authors: De Liang Zhang, Paul Ewart, Seokyoung Ahn
The formulation process relies on rheological data from extensive testing, including viscometry and thermal analysis, and also on metallurgical chemistry of the final part [1, 2], a particular focus on the level of interstitial elements, oxygen, nitrogen and carbon.
[16] Ismail, M.H., et al., Study of Evolution of Pore Structure during Water Leaching using PEG-PMMA Binder System, in A collection of technical literature on Powder Injection Moulding, MPIF, Editor. 2007, Metal Powder Industries Federation: Princeton, NJ
[16] Ismail, M.H., et al., Study of Evolution of Pore Structure during Water Leaching using PEG-PMMA Binder System, in A collection of technical literature on Powder Injection Moulding, MPIF, Editor. 2007, Metal Powder Industries Federation: Princeton, NJ
Online since: May 2004
Authors: Ana Luisa Fernando, Valentina Godovikova, José Filipe Santos Oliveira
The utilization of domestic sludge in agriculture,
presents the advantage of contributing to an increase in organic matter and nutrients in the soil,
+
corresponding author: jfso@fct.unl.pt 438 Title of Publication (to be inserted by the publisher)
making it more fertile and improving its structure.
Baird: Environmental Chemistry (W.
Baird: Environmental Chemistry (W.