Preparation and photocatalytic properties of g c3 n4
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- 4. INTRODUCTION
- 5. Physical and chemical appearance of g-C3N4
- 6. Preparation Heating melamine in a muffle furnace at 345ï‚°C or above gives g-C3N4 .
- 7. ANALYSIS OF PHOTOCATALYTIC BEHAVIOUR • X-ray Difractometer • UV-vis spectrophotometer • Scanning electronic microscope (SEM) • Transmission electronic microscope (TEM)
- 8. XRD patterns at different temperature • The products maintained as crystalline melamine phase when the heating temperature is lower than 300C. • when the temperature rises to 350–400C, it is transformed into crystalline or amorphous graphite like carbon nitride compounds • the temperature is higher than 500C, the products completely forms into amorphous g-C3N4.
- 9. UV/visible spectra of g-C3N4 The UV-visible diffuse reflectance spectra showed that the absorption edges of samples is close to 468 nm.
- 10. SEM analysis The morphology of melamine processed at 300C is granular with a particle size of 50–80 nm. The processed temperature is higher than 400C, the morphology of products have transformed into layer. Flake size : 0.5–0.8 mm SEM images at (b) 400CSEM images at (a) 300C
- 11. SEM images at (d) 600C .SEM images at (c) 500C The processed temperature rises to 500C . the size is also increased to 0.5–1.0 mm The processed temperature rises to 600C size is also increased to 0.5–1.5 mm
- 12. HR-TEM, images of g-C3N4 at 600ï‚°C for 2 h. TEM analysis Layer like structure No crystal fring is observed so amorphous in structure TEM, images of g-C3N4 at 600ï‚°C for 2 h.
- 14. CB VB Photon Band gap : 2.73ev Hydrogen generation organic pollutants to carbon dioxideMust be done quickly
- 17. A massage Save water from pollution Save life
- 18. ACKNOWLEDGEMENT Profesor Mikhael FogelstormProfessor Rose Amal Dr. Asok Kumar Chakraborty Dept. Of Applied Chemistry And Chemical Technology Islamic University, Kushtia.