Hydrothermal zinc oxide nanowire growth with different zinc salts

2012-09-01
Akgun, Mehmet Can
Afal, Aysegul
Ünalan, Hüsnü Emrah
The effect of the use of different zinc salts as zinc sources during hydrothermal growth of zinc oxide nanowires was systematically investigated. Change in the temperature, pH, and transmittance of the growth solutions prepared with three different zinc salts was monitored and used to provide a broad explanation to the effect of the salt. In addition to conventional heating process, microwave heating of the growth solutions was also performed, and differences in the ZnO nanowires synthesized through both heating methods were examined. It was found that ionization of zinc in growth solutions is influencing the formation of ZnO nanowires leading to growth with different aspect ratios, and zinc acetate dihydrate salt allows the synthesis of nanowires with the highest aspect ratio.
JOURNAL OF MATERIALS RESEARCH

Suggestions

Hydrothermal zinc oxide nanowire growth using zinc acetate dihydrate salt
AKGUN, Mehmet Can; Kalay, Yunus Eren; Ünalan, Hüsnü Emrah (2012-06-01)
Hydrothermal approach is widely used for the synthesis of zinc oxide (ZnO) nanowires. Zinc nitrate hexahydrate, zinc acetate and zinc chloride are three common salts that are used for synthesis. Among these, zinc nitrate hexahydrate is primarily used in many studies and zinc chloride is preferred for electrodeposition. In this work, zinc acetate dihydrate salt is used for the growth of ZnO nanowires and the effects of time, temperature, solution concentration and concentration ratios of the precursor chemic...
Aerobic biological treatment of opium alkaloid wastewater-effect of gamma radiation and fenton's oxidation as pretreatment
Bural, Cavit Burak; Dilek, Filiz Bengü; Department of Environmental Engineering (2008)
In this study, aerobic biological treatment of opium alkaloid wastewater and the effect of gamma preirradiation and fenton’s oxidation were investigated. First, the biodegradability of alkaloid wastewater was investigated by batch reactors and wastewater was found to be highly biodegradable providing 83 90 % COD degradation. In order to evaluate the effect of irradiation, original wastewater and irradiated wastewaters (40 & 140 kGy) were compared by means of BOD5/COD values and through aerobic batch experi...
Hydrothermal treatment of perlite with caustic soda to produce metal silicate solutions
Yilmaz, S; Yucel, H (2001-11-01)
The effects of temperature, concentration of caustic soda and liquid to solid ratio on hydrothermal treatment of perlite with caustic solution to produce metal silicate solutions were investigated. The reaction was carried out in laboratory autoclave of 1 L capacity over a range of experimental conditions. The treatment time was kept constant at I hour. The chemical compositions of liquid products were analyzed by standard wet chemical methods. The results indicated that, under favorable conditions, aqueous...
Electrochemical Formation of Alloys of Scandium in Molten Salts
polat, çağlar; ERDOĞAN, METEHAN; iplikçioğlu, Safder; Karakaya, İshak (2018-02-01)
The Al-Sc alloy formation by the reduction of Sc containing compounds in a molten salt containing CaCl2 was investigated in this study. The preliminary tests revealed that Al3Sc intermetallic, which gives the superior properties to this alloy, was successfully formed and distributed homogeneously throughout the Al matrix. XRD, SEM-EDS and optical microscopy analyses were used to confirm the results.
Nanowire-based multifunctional antireflection coatings for solar cells
Hiralal, Pritesh; Chien, Chihtao; Lal, Niraj N.; Abeygunasekara, Waranatha; Kumar, Abhishek; Butt, Haider; Zhou, Hang; Ünalan, Hüsnü Emrah; Baumberg, Jeremy J.; Amaratunga, Gehan A. J. (2014-01-01)
Organic (P3HT/PCBM) solar cells are coated with ZnO nanowires as antireflection coatings and show up to 36% enhancement in efficiency. The improvement is ascribed to an effective refractive index which results in Fabry-Perot absorption bands which match the polymer band-gap. The effect is particularly pronounced at high light incidence angles. Simultaneously, the coating is used as a UV-barrier, demonstrating a 50% reduction in the rate of degradation of the polymers under accelerated lifetime testing. The ...
Citation Formats
M. C. Akgun, A. Afal, and H. E. Ünalan, “Hydrothermal zinc oxide nanowire growth with different zinc salts,” JOURNAL OF MATERIALS RESEARCH, pp. 2401–2407, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47448.