Activated Carbon Pruduction and Characterization Studies from Cane (Phragmites australis) by Microvave Assisted Pyrolsis Process
Ahmet Helvaci,
Sinem Geyik,
Ziya Özgür Yazici
Issue:
Volume 6, Issue 1, June 2020
Pages:
1-4
Received:
28 May 2019
Accepted:
10 July 2019
Published:
8 January 2020
Abstract: Activated carbon is an adsorption material with a large internal surface area and pore volume, which is obtained by the activation of the increasingly high content of carbon containing materials. Active carbon is used in the removal of organic pollutants and taste and odor disorders from household and industrial wastewater, as well as many areas such as various gas phase applications as well as the purification of chemical products. The cane grows spontaneously in lakes all of them in western Anatolia. Due to its easy accessibility and abundance, the cane is very economical to use it in production of activated carbon. The aim of this work is to obtain activated carbon from the cane, which as a cheap and an abundant raw material, by means of the quick microwave oven. Activated carbon production was carried out in two stages. In the first step sawdust of cane was activated with o-phosphoric acid solutions (30%, 40% and 50%). The second stage is carbonization in a microwave oven. Carbonization processes of 20 and 30 minutes were carried out at 300 and 450 watt microwave power levels. Methylene blue aqueous solutions were used for performance tests of the obtained activated carbon samples. BET surface area measurement, SEM photographs and FT-IR analyzes were used to determine the physical properties. It was concluded that 20 minutes of carbonization at the 300 watt microwave power level was sufficient for the studies. BET surface area of the best powder active carbon sample which is obtained in optimum conditions has been specified as 1096,9 m2/g.
Abstract: Activated carbon is an adsorption material with a large internal surface area and pore volume, which is obtained by the activation of the increasingly high content of carbon containing materials. Active carbon is used in the removal of organic pollutants and taste and odor disorders from household and industrial wastewater, as well as many areas su...
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Tunability and Graded Energy Band Gap of Chemical Bath Deposited Cadmium Sulfide (CdS) Thin Film for Optoelectronic Applications
Sunday Samuel Oluyamo,
Abass Akande Faremi
Issue:
Volume 6, Issue 1, June 2020
Pages:
5-9
Received:
30 July 2019
Accepted:
6 September 2019
Published:
16 January 2020
Abstract: CdS thin films have continued to receive scientific and technological attention due to their potential applications in efficient solar energy conversion and utilization in device fabrication. In this research, CdS thin films were deposited on indium doped tin oxide (ITO) substrates of dimension 2.3 by 2.4 cm2. Three different aqueous bath solutions of CdS were formed by increasing the concentration of cadmium acetate as a source of cadmium while the concentration of ammonium chloride and thiourea as a source of sulfur remained constant in the reaction bath as against the usual convention to ascertain the strength of the constituents in the reaction. The energy band gap of the films decreases with increase in the concentration of cadmium as a constituent of the bath while the films optical transmittance was found to increase with increase in concentration. This indicates that the energy band gap of the films can be predetermined by the choice of the constituent of the concentration in the chemical bath deposition technique (CBD). The increase in the transmittance for both as deposited and annealed CdS confirms the suitability of the films as window layer device, solar cell and optoelectronic applications.
Abstract: CdS thin films have continued to receive scientific and technological attention due to their potential applications in efficient solar energy conversion and utilization in device fabrication. In this research, CdS thin films were deposited on indium doped tin oxide (ITO) substrates of dimension 2.3 by 2.4 cm2. Three different aqueous bath solutions...
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