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MORPHOLOGICAL VARIATION OF GRAPHENE OXIDE DOPING IN VANADIUM BOROPHOSPHATE…
MORPHOLOGICAL VARIATION OF GRAPHENE OXIDE DOPING IN VANADIUM BOROPHOSPHATE SYSTEM
5. EXPECTED RESULTS
1. INTRODUCTION
Significant and Impact of Study
Scalable and low-cost doping of graphene could improve technologies in a wide range of fields such as
microelectronics, optoelectronics, and energy storage
Aim and Objectives
To study the morphological variation graphene oxide doping in vanadium borophosphate glass system.
To study the changes in the traits of the of vanadium borophosphate glass system when doped with graphene oxide
Problem Statements
What are the morphological variation of graphene oxide doping in vanadium borophosphate glass system?
How does it affects the characteristics of the glass? in strength, electrical conductivity, thermal conductivity, Yong's modulus (modulus of elasticity), etc.
What kind of equipment is used in the making of graphene oxide doping in vanadium borophosphate glass system.
what are the conditions (temperature, pressure, etc) in the making of the glass to produce the desired product?
Research Scope
Materials
Graphene oxide
Vanadium borophosphate glass system
Instruments/equipments used
Parameters
Research Background
Graphene Oxides (reinforced composite materials) have: 1. uniform dispersion. 2. interaction with matrix is highly desired - better mechanical properties :
Oxide glasses containing transition-metal ions (TMI) show semiconducting properties due to the presence of transition metal ions in more than one valence states.
Application in optical switching, cathode material electrochromic display devices
Chemical doping is efficient for tailoring the carrier concentration and the electronic properties of graphene that previously derived from metal substrates
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4. MATERIALS AND SAMPLES PREPARATION
Preparation of graphene oxide. (Song, Wang & Chang, 2014)
Graphene Oxide (GO) was prepared
according to the modified Hummer method.
5 g of graphite and 2.5 g of NaNO3 are mixed with 108mL H2SO4 and 12mL H3PO4 and stirred in an ice bath for 10min.
15g of KMnO4 were slowly added so that the temperature of the mixture remained below 5 degree celcius..
Preparation of vanadium borophosphate glass (Das & Ghosh, 2017)
Glass sample of composition 0.5V2O5-0.5[xB2O3-(1-x)P2O5] , x(mol fraction)=0.4 were prepared using the melt quenching technique
The chemicals are mixed throughly and the mixtures is heated in an alumina crucible for 2h at 450 degree celcius for calcination in furnace. the the temperature is raised to 1000 degree celcius.
The melt is kept at 1000 degree celcius for 2 h and poured onto an aluminium block and is pressed immediately by another aluminium block
Preparation of Glass/GO composite (doping process)
Using chemical vapour deposition (CVD)
The vanadium borophosphate glass (substrate) is exposed to one or more graphene oxide volatile precursors, which react and/or decompose on the substrate surface to produce the desired deposit
Ion implantation.
The ion implantation charged dopants (ions) are accelerated in an electric field and irradiated onto the wafer
The penetration depth can be set very precisely by reducing or increasing the voltage needed to accelerate the ions
Since the process takes place at room temperature, previously added dopants can not diffuse out. Regions that should not be doped, can be covered with a masking photoresist layer.
Characterisation (instrument)
3. CHARACTERISATION METHODS
X-ray Diffraction (XRD)
To study the graphene oxide doping in vanadium borophosphate glass crystal structure)
UV-VIS
To asses optical response and thermal stability
2. LITERATURE REVIEW
6. RESEARCH PLANNING
