Title Page
Contents
ABSTRACT 9
Chapter Ⅰ. Introduction 11
Chapter Ⅱ. Theoretical background 14
1. Formaldehyde 14
1.1. Health hazards of Formaldehyde 14
1.2. Previous studies for formaldehyde removal 16
2. Metal-organic frameworks (MOFs) 18
3. Formaldehyde measuring system 20
Chapter Ⅲ. Experimental methods 22
1. Materials 22
2. Synthesis 22
2.1. Synthesis of [bis(2,2'-bipyridine)(5,5'-dicarboxy-2,2'-bipyridine-)ruthenium(II)]dichloride (Ruthenium complex). 22
2.2. Synthesis of UiO-67. 22
2.3. Synthesis of Ru;UiO-67. 22
3. Characterization 23
3.1. Characterization of synthesized Ru complex, UiO-67 and Ru;UiO-67. 23
3.2. Analysis for formaldehyde photocatalytic ability. 24
3.3. Analysis for photocatalytic activity. 24
Chapter Ⅳ. Results and discussion 26
1. Synthesis of Ru;UiO-67 26
1.1. Synthesis of Ru ligand 26
1.2. Synthesis of Ru;UiO-67 26
2. Structural characterization of Ru;UiO-67 28
3. Analysis for formaldehyde photocatalytic ability 35
3.1. Formaldehyde adsorption ability 35
3.2. Photocatalytic absorption ability 36
4. Photocatalytic activity of Ru;UiO-67 40
5. Photocatalytic stability of Ru;UiO-67 46
Chapter Ⅴ. Conclusion 52
Chapter Ⅵ. Reference 54
ABSTRACT IN KOREAN 62
Figure 1. Health effect of formaldehyde. 15
Figure 2. Previous studies for Formaldehyde removal. 17
Figure 3. The structure image of MOFs. 19
Figure 4. Diagram for application of MOFs. 19
Figure 5. Schematic image of formaldehyde measuring system. 21
Figure 6. Synthesis of Ru lingand [bis(2,2'-bipyridine N,N)(5,5'-dicarboxy-2,2'-bipyridine-)ruthenium(II)] 27
Figure 7. Synthesis of Ru doped UiO-67 MOF. 27
Figure 8. STEM images (left) and EDS mapping of zirconium (center) and ruthenium (right) of UiO-67 and Ru;UiO-67. 31
Figure 9. SEM image of Ru;UiO-67. 32
Figure 10. PXRD patterns of UiO-67 and Ru;UiO-67. 32
Figure 11. N₂ adsorption isotherms of UiO-67 and Ru;UiO-67 at 77K. 33
Figure 12. digested ¹H-NMR spectra of UiO-67, Ru;UiO-67 and ligands. 34
Figure 13. Formaldehyde adsorption graphs of UiO-67 and Ru;UiO-67 in real-time. 37
Figure 14. Adsorption isotherms of formaldehyde for UiO-67 and Ru;UiO-67. 38
Figure 15. UV-Vis spectrums of UiO-67, Ru;UiO-67 and Ru ligand. 39
Figure 16. Formaldehyde removal graphs of Ru;UiO-67 w/wo light irradiation in real-time. 42
Figure 17. Formaldehyde removal graphs of Ru;UiO-67 with light irradiation in real-time for 48 hours of measurement. 43
Figure 18. Formaldehyde removal graph of Ru;UiO-67 with light irradiation after 5 hours of adsorption in real-time. 44
Figure 19. Cyclic test of Ru;UiO-67 with or without light irradiation in real-time. 45
Figure 20. SEM image of synthesized Ru;UiO-67 (left), after adsorption (center) and after decomposition (right). 48
Figure 21. PXRD patterns of synthesized Ru;UiO-67, after adsorption and after decomposition. 49
Figure 22. N₂ adsorption isotherms of synthesized Ru;UiO-67, after adsorption and after decomposition at 77K. 50
Figure 23. digested ¹H-NMR spectra of synthesized Ru;UiO-67, after adsorption and after decomposition. 51