??????,?????? ??TiO2?????????,???????????

1
????-????????

• ?????????
• ???
• 2008.01.24

2
???????? ??????????,???????????,????????????,????
?????????????
3
??????? ???????????
4
?????????
5
????-??? ???
6
???????,??????? - U2 DVD???
??????,?????? ??TiO2?????????,???????????
7
??

• ??????
• ??????
• ??????
• ??????
• ???????????

8
Market size of photocatalysis

• 1998 nearly zero
• 2001 300 million US in Japan
• 20 million US in Europe
• nearly zero in USA
• 2002 400 million US in Japan
• 200 million US in Europe
• ? in USA
• 2003 1 billion US in world

9

• ??????????????,??????????1997??2004?,?????????????
  ,????????????????????,??????????????????????,?????
  ????,??????????
• ???????????,?????????????100????????,????????????,
  ???????200?????????????

10

• ???????????????????10???,?2010?????13???????,??5
  10?????????????,?????????

http//www.nbdpc.gov.cn/big5/main_view.php?id1145
583163theme386
11
I. ??????

• ?? ????,????????????????,??????????????????
• ???????????????????,??????????????????????????????
  ????????????????????????????,??????????

12
??????

• ??? (photocatalyst?photocatalysis)
  ??????????????, ??????????, ??????????????????.
• ?????????????(Chlorophyll)???????.
  ??????????????????, ???????????????????????.

Definition by Wu
13
H2O CO2 gt O2 CnHm
hv ???
14
1.??? ????
2. ??? ??(??)
15

• ???????,????????????,???????????????????,?????????
  ??????????????????????????????????????????????????
  ??????????,???????????????(NOx)????(SOx)??????

• http//nano.nchc.org.tw/dictionary/photocatalyst.h
  tml

16

• ?????????????????,????????,????????,??????????????
  ????????,????????(?????)????,??????,??????????????
  ????????????????????,??????????????????????--?,???
  ???,???????????

17
????????????

• ??????????????,????????,?????????????,????????????
  ????????????,?????????????????????????????,???????
  ????500??
• ???????????????????????300nm?????(??????????)????5
  0????,???????????10?????????????,??????????????,
  ??????????????????????????,???????????????http/
  /www.aist.go.jp/aist_j/press_release/pr20011206_1/
  pr20011206_1.html

18
????TiO2?

• ????????????,??????????????????????????,??????????
  ????,???????????????,???????????????????????
  TiO2 ???N????,?????TiO2 ??????A-type??????R-type??
  ????B-type?,????????????A-type?B-type?????????????
  ??????????,?????(????FDA ????????)????(UV ???)?

19
II. ??????

• TiO2 ??????????????????????????????????,??????????
  TiO2 ?????????????????????????????????????,???????
  ????,???TiO2????(H2O)?????????????????????? O
  ?O2?OH-,??????????(????)???(????)?????,??UVA??????
  ??????????(?????)?????????????????????????????
  TiO2 ????????

20
(No Transcript)
21

• ????????????(valence band)?????(conduction
  band)?????,?????????????????????(band gap) ??????
  E ???lambda????????
• E  h  C  /  ??? h ??????(Planck
  constant),C??????????????3.2 eV,??????380
  nm,???????????,????380 nm(?????3.2
  eV)????????????????????

22

• ????????????,????????????,?????????????????,??????
  ????????????,????????????????(OH-)??(??????),?????
  ?????????(OH radical)?????????????,???????,??????
  ???????????
• ??????????????????,??????????????????,????????????
  ???    

23
OH- hole gt OH
???????????
24

• ??????????,??TiO2?ZnO ? SnO2? ZrO2?????CdS ?
  ZnS????,??????(Titanium Dioxide,TiO2)?????????????
  ??,?1972?????,???????????????????????????
• ??????????,???????(Anatase)???? (Rutile)????
  (Brookite)??????,?????????????????

25
(No Transcript)
26

• ????????????,???????????(390780
  nm)??????????,??????????????????,????????????????
  ?,?????????????????????????????

27
III. ?????
http//www.photocatalyst.co.jp/english/english3.ht
m
28
(No Transcript)
29
IV. ?????

• 1.???????????????????????????????????
  ????? ?????????    2.???????????????????????????
  ????????????? ????????     3.???????????????????
  ???????     4.??????????????????????????????????
  ????? ???????????????     5.????????????????????
  ????,?????????,????? ????????

30
?????????

• ??????????????????????????????????????.
• ??????????????, ????????????????, ?????????????.

31
(No Transcript)
32
????????
33
1. Anti-Bacteria
34
Anti-Bacteria
???????? E.coli ??????
35
(No Transcript)
36
2. ????
?? ??????, ???????
37
????
?? ??????, ???????
38
????
????????
39
????
40
The Left is uncoated one, the right is coated
one.
41
????
42
3. ????
43
????
44
4. ????
45
4. ????
Tap water Conventional water New product
over 1.0ppm 0.14ppm undetectable
46
5. ????
47
???? ????
48
???????? ?
49
?????? ?
50
(No Transcript)
51
???????

• ????????????????????.
• ?????????25??, ??????.
• ??????????, ??????, ???????????25000??.

Ref ???, ????, ?????, ??????, 2000?
52
Tap water Conventional water New product
over 1.0ppm 0.14ppm undetectable
53
(No Transcript)
54
(No Transcript)
55
(No Transcript)
56
(No Transcript)
57
The noise insulation wall
Photocatalyst concrete 
58
Binder fixation coating film


59
?????? 2007.12
1. ??????? Terbofus
60
(No Transcript)
61
(No Transcript)
62
2. ????????? Production of hydrogen by water
splitting reaction on WO3/Pt/TiO2 under UV light
irradiation
H2O gt H2 ½ O2
The yields of H2 on 0.33 wt
WO3/0.04 wt Pt/TiO2 were 2009 µmolh-1gcat-1.
63
3. ??????

• The UV-visible absorption spectroscopy revealed
  that its decomposition was varied with time.
• It was found that after 1 min irradiation, the
  decomposition rate of MB was reach to 95 .
  Compared with other photocatalysts to decompose
  MB solution, the modified-TiO2 catalyst is more
  effective than literatures.

64
?? ?? ????? ??? () ?? ??
Xin P.Lin 2006 BiSbO4 50 4h Xe 300?
Xin P.Lin 2006 TiO2 20 5h Xe 300?
Xin P.Lin 2006 5RuO2/BiSbO4 80 10min UV
D.P.Das 2007 TiP/TiO2 43 60min  Sun light
D.P.Das 2007   ZrP/TiO2 24 30min  Sun light
???? 2007 Modified-TiO2 95 1 min LED(??)
65
??????????
66
????(Methylene Blue )

• Methylene blue is an heterocyclic aromatic
  chemical compound with molecular formula
  C16H18ClN3S.
• It has many uses in a range of different fields,
  such as biology or chemistry.

67
Methylene Blue                                  
                       
68
? UV ?
? UV 1hr no TiO2
? UV 1hr Pt/TiO2
? UV 2 hr Pt/TiO2
69
Methylene Blue
70
OH ???????? MB, ???????N ????
71
OH ???????? MB, ???????N ????
72
???????????
?? 1.????(p25),????????? 2.??? ?? 1.??10pp
m?5ppm?3ppm?1ppm?????,??????????????
,??????? 2.?0.020g?????40ml??????100ml??,?????10??
? 3.???????0?15?30?60??,??7ml ????(3000
rpm)30??? 4.?????????? 5.????????????????.
73
(No Transcript)
74
 
75
Conclusion

• ??????????.
• ?????????.
• ?????????.