1. IN THE NAME OF GOD

2. Highly selective oxidation of benzyl alcohol to benzaldehyde catalyzed by core-shell nanostructures
Presenter: Prof. Rahmatollah Rahimi
Magor student:
Mahdi Heidari-Golafzani

3. Results and discussions
Introduction
Experimental
Results and discussions
Conclusion

4. Homogeneous catalysis Heterogeneous catalysis
Introduction
Homogeneous catalysis
Oxidation
Heterogeneous catalysis

5. Homogeneous catalysis
Benefits
High activity and high selectivity
Heat transfer and energy supply for reaction
Defects
Purification of catalyst is difficult
Recovery of catalyst is difficult

6. Heterogeneous catalysis
Benefits
Easy separation
Reusability

7. Important of Zn-Fe2O4@ZnO
Heterogeneous
Magnetisablity
Stability
Easy synthesis

8. Schematic of reaction

9. Benzaldehyde Precursor of pharmaceuticals
Precursor of plastic additives
Prepare of aniline dye malachite green
Precursor of certain acridine dyes
Prepare of cinnamaldehyde and styrene

10. Experimental
H2O2
Cat.
Alcohol
Acetonitrile
80 ºC

11. Catalyst synthesis Ethylene glycol ZnCl2 FeCl3.6H2O vigorous stirring
ammonium acetate
Foam

12. Catalyst synthesis
215 ºC
black precipitation (Zn-Fe2O4)
48 h

13. Zn-Fe2O4 application

14. adsorption Curve

15. Zn-Fe2O4 analysis
XRD
VSM
SEM

16.
311
440
511
400
220
422

18. ̴ 120 nm

19. Catalyst synthesis DI Water Zn-Fe2O4 zinc acetate NH3 (pH=11) 3 h,

20. Results and discussions

21. analysis
TEM
SEM
XRD
BET
VSM

22. SEM
̴ 150 nm

23. TEM

24. XRD

25. BET

26. VSM
76 emu/g
30 emu/g

27. catalyst
photocatalyst

28. Photocatalytic activity

29. Photocatalytic degradation curve

30. Catalytic activity

31. GC analyze

32. MASS analyze

33. Optimization

34. Evaluation

35. Comparision Table 3. Comparison with other catalysts
a Reaction condition:(1mmol) catalyst, 80C, 1.5h, under 1 atm of molecular oxygen. Conversion and selectivity were determined by GC-MASS using an intemal standard.
b Percent of conversion determined by GC-Ms.
c Percent of selectivity determined by GC-Ms.
d Benzhydrol (1 mmol), 70% TBHP (3 mmol), Cat. (10 mol%), temperature (70 ◦C).
e Benzyl alcohol (20.0 mmol), Cat. (10 mol%),30 wt% H2O2 (33.0 mmol), temperature (70 ◦C).
f Benzyl alcohol (10.0 mmol), Cat. (1mol%), 30 wt% H2O2 (10.0 mmol), temperature (75 ◦C).

36. Recyclability

37. Conclusion High selectivity Short reaction time Heterogeneusly
Inviormentaly firendly
Good to excellent yield
Reusability

38. References
[1]. Burange, A. S., Kale, S. R., Zboril, R., Gawande, M. B., & Jayaram, R. V. (2014). Magnetically retrievable MFe 2 O 4 spinel (M= Mn, Co, Cu, Ni, Zn) catalysts for oxidation of benzylic alcohols to carbonyls. RSC Advances, 4(13), [2]. Yan, K., Wu, X., An, X., & Xie, X. (2013). Facile synthesis and catalytic property of spinel ferrites by a template method. Journal of Alloys and Compounds, 552, [3]. Shi, F., Tse, M. K., Pohl, M.-M., Radnik, J., Brückner, A., Zhang, S., et al. (2008). Nano-iron oxide-catalyzed selective oxidations of alcohols and olefins with hydrogen peroxide. Journal of Molecular Catalysis A: Chemical, 292(1), [4]. Rahimi, R., Kerdari, H., Rabbani, M., & Shafiee, M. (2011). Synthesis, characterization and adsorbing properties of hollow Zn-Fe 2 O 4 nanospheres on removal of Congo red from aqueous solution. Desalination, 280(1), [5]. Rahimi, R., Heidari-Golafzani, M., & Rabbani, M. (2015). Preparation and photocatalytic application of Zn-Fe 2 O ZnO core-shell nanostructures. Superlattices and Microstructures.

39. THE END