Synthesis of La:Co:TiO2 Nanocomposite and Photocatalytic Degradation of Tartaric Acid in Water at Various Parameters
Azad Kumar,
Gajanan Pandey
Issue:
Volume 5, Issue 4, August 2017
Pages:
40-48
Received:
4 July 2017
Accepted:
13 July 2017
Published:
1 August 2017
Abstract: In this study, nanocomposites of La:Co:TiO2 was prepared by the co-precipitation method. The alcoholic route of synthesis was adopted here which was gives greenish homogeneous powder of La:Co:TiO2. The material was found in the nanodiamension by the SEM analysis. The rutile and anatase both phases were present in XRD analysis of the synthesized materials. The particle size was found 24 and 82 nm in case of La:Co:TiO2 and pure Titania respectively. The surface area of Titania and La:Co:TiO2 nanocomposites were found 6.4 and 43.2 m2/g. The band gap energy of Titania and La:Co:TiO2 nanocomposites were found 3.2 eV and 3.0 eV respectively. The photodegradation of Tartaric Acid was investigate at different parameters such as temperature, concentration, pH of reaction mixture, dose of photocatalyst and time of illumination of UV-Visible light. The photodegradation of Tartaric Acid occurs 60-80% in presence of Cobalt lanthanum modified Titania and in presence of neat Titania only 20-40% degradation was observed. It is found that photodegradation of Tartaric Acid follow the first order mechanism and its rate constant is become doubled when temperature is rise by 10°C.
Abstract: In this study, nanocomposites of La:Co:TiO2 was prepared by the co-precipitation method. The alcoholic route of synthesis was adopted here which was gives greenish homogeneous powder of La:Co:TiO2. The material was found in the nanodiamension by the SEM analysis. The rutile and anatase both phases were present in XRD analysis of the synthesized mat...
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Testing Results of Plasma Spraying Ceramics Coatings by Pulse Plasma Modulation Technology
Issue:
Volume 5, Issue 4, August 2017
Pages:
49-60
Received:
31 July 2017
Accepted:
11 August 2017
Published:
13 September 2017
Abstract: The work below was done mainly in the USSR (Tajikistan) and partly continued in Israel. This technology provides substantially better coating performance compared with the respective individual processes (plasma, Cold Spraying, arc or oxy-fuel, etc.). The coatings of large areas can be accomplished at much higher quality and deposition rates than conventional plasma, arc or flame spray techniques and at a far lower cost. These benefits have been accomplished through a specially designed torch head and power supply modulation unit. The system does not require expensive argon-helium based plasma of hydrogen, nitrogen or helium mixtures but rather uses air plasma alone or in combination with hydrocarbon fuel. The plasma chemical technology overcomes a previously fundamental limitation of air plasma systems - oxidation of the coating. In addition, the proprietary design of the torch head and supply modulation unit produces both superior coating and substantially reduces the erosion rate of expensive torch electrodes thereby significantly increasing the resource of operating time of a plasma generator. Detailed design specifications and process validation experiments have been of successfully completed, and the design, technology and market of a pre-production prototype has passed through an evaluation by potential strategic partners with the impressive estimation.
Abstract: The work below was done mainly in the USSR (Tajikistan) and partly continued in Israel. This technology provides substantially better coating performance compared with the respective individual processes (plasma, Cold Spraying, arc or oxy-fuel, etc.). The coatings of large areas can be accomplished at much higher quality and deposition rates than c...
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