Synthesis and Characterization of CuO/graphene oxide ... - ethesis

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CHAPTER-II 2.1Preparation of CuO: 5 ml of the above two (Cu (NO 3 ) 2 ⋅ 3H 2 O and citric acid) prepared solution and 50 ml of graphene oxide (dispersed in water) was taken in another beaker, and it was stirred about 1 hour, keeping the temperature of the material at 100 0 C during the process. Then the composite was annealed at 200 0 C for 2 hour. 2.2 Flow chart: Synthesis techniques for CuO 0.1 molar solution of Cu (NO 3 ) 2 .3H 2 O in 100 ml distilled water 0.1 molar solution of citric acid in 100 ml of distilled water Mixture of the two solutions Gel formed At 100 0 c, constant stirring for 1 hr At 200 0 c A light fluffy mass of CuO formed Annealing at different temperature for 2 hour Black Powder 5
2.3 Preparation of Graphene Oxide (GO) Similarly Go was prepared by solution method. GO is prepared firstprepared by modified Hummers’ method [22,23]. In brief, GO oxide sheets were prepared from expanded graphite flakes. To exfoliate the pre-oxidized graphite powders into few layer GO sheets, the expanded graphite (EG) powder (2 g) and 15.0 g KMnO 4 was added into H 2 SO 4 (120 ml) under ice-bath cooling and stirred for 2 h. The solution was diluted in DI water (250 ml), then 20 mL H 2 O 2 (30%) added to it at room temperature. After precipitation for 12 h, the upper supernatant was collected and centrifuged, where the GO powders were obtained as precipitates. To remove the metal (MN 2+ )ions existing in the GO powders, they were dissolved in HCl solution. Finally, GO was washed many times with DI water till it reaches the PH-7. 2.4 Preparation of CuO/GO composite 5 ml of the above two (Cu (NO3)2 ⋅ 3H2O and citric acid) prepared solution and 50 ml of graphene oxide (dispersed in water) was taken in another beaker, and it was stirred about 1 hour, keeping the temperature of the material at 1000C during the process. Then the composite was annealed at 2000C for 2 hour. The above process was repeated for CuO (10 ml)/ Graphene Oxide (50 ml). 6
Page 1 and 2: Synthesis and Characterization of C
Page 3 and 4: Declaration I hereby declare that t
Page 5 and 6: CONTENTS Page No. Abstract 1 Chapte
Page 7 and 8: CHAPTER-I 1.1 Introduction Studies
Page 9: Figure 1 The Unit Cell of Copper (I
Page 13 and 14: 2.6 Characterization techniques: Th
Page 15 and 16: 2.6.2 Scanning Electron Microscope:
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Page 19 and 20: Intensity(a.u) 110 202 113 111 111
Page 21 and 22: the sample. As a result the electri
Page 23 and 24: CHAPTER-IV Conclusion: Here CuO/GO
Page 25: [12]. Kosugi, T.; Kaneko, S. J. Am.

Synthesis and Characterization of CuO/graphene oxide ... - ethesis

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