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≀㉁⣔ᕤᏛᑓᨷ
࢚ࢿࣝࢠ࣮࣭⎔ቃศ㔝
ග㟁Ẽ໬Ꮫ◊✲ᐊᩍᤵከ⏣ᘯ᫂ ࣭ ຓᩍ ⸨ᓥ Ṋⶶ
Laboratory of Photoelectrochemistry Prof. Hiroaki Tada, Assistant Prof. Musashi Fujishima
࣮࣮࢟࣡ࢻ
ྍどගගゐ፹, ேᕤගྜᡂ, ኴ㝧㟁ụ, ࢼࣀࢸࢡࣀ
ࣟࢪ࣮, ࢢ࣮ࣜࣥࢣ࣑ࢫࢺ࣮ࣜ
Visible light photocatalyst, Artificial photosynthesis,
Solar cells, Green chemistry, Nanotechnology
◊✲ෆᐜ
>@ྍどගᛂ⟅ᆺගゐ፹
>@ ༙ᑟయ㸫༙ᑟయ࢝ࢵࣉࣜࣥࢢ⣔
(1) ࣃࢱ࣮ࢽࣥࢢ TiO2㸦࢔ࢼࢱ࣮ࢫ㸧/TiO2㸦ࣝࢳࣝ㸧
ᆺࣂ࢖ࣞ࢖࣮ࣖගゐ፹ⷧ⭷࡟࠾࠸࡚ࠊ࢔ࢼࢱ࣮ࢫ࠿
ࡽࣝࢳࣝ࡬ࡢගㄏ㉳⏺㠃㟁Ꮚ⛣ືࡀ㉳ࡁࡿࡇ࡜ࢆᐇ
ドࡍࡿ࡜࡜ࡶ࡟ࠊࡑࡢάᛶࡀࣃࢱ࣮ࢽࣥࢢࢹ࢕࣓ࣥ
ࢩࣙࣥ࡟౫Ꮡࡍࡿࡇ࡜ࢆぢฟࡋࡓࠋ
(3) CdS 㔞Ꮚࢻࢵࢺ(QD)ࢆࠊ࣓ࢯ࣏࣮ࣛࢫ TiO2 ⷧ⭷
(mp-TiO2)ࡢእ㒊⾲㠃ࡔࡅ࡛࡞ࡃࠊ⣽Ꮝෆ㒊⾲㠃࡟ࡶ
ᙧᡂࡍࡿࡇ࡜ࡢ࡛ࡁࡿࠊගᯒฟἲࢆ㛤Ⓨࡋࡓࠋග㟁
Ẽ໬Ꮫⓗ࡞ᡭἲࢆ⏝࠸࡚ࠊࡑࡢᇶᮏⓗ࡞཯ᛂ࣓࢝ࢽ
ࢬ࣒ࢆゎ᫂ࡋࡓࠋ
⌧ᅾࠊ◲໬≀༙ᑟయ㸫㓟໬≀༙ᑟయ࠾ࡼࡧ㓟໬≀
༙ᑟయ㸫㓟໬≀༙ᑟయ࢝ࢵࣉࣜࣥࢢ⣔ࡢྍどගගゐ
፹࡟㛵ࡍࡿ◊✲ࢆᒎ㛤୰࡛࠶ࡿࠋ
>@ 㑄⛣㔠ᒓࢡࣛࢫࢱ࣮⾲㠃ಟ㣭㓟໬ࢳࢱࣥ⣔
TiO2 ⾲㠃ࢆศᏊࢫࢣ࣮ࣝࡢ㓟໬㕲ࢡࣛࢫࢱ࣮࡛⾲㠃
ಟ㣭ࡍࡿࡇ࡜࡟ࡼࡾࠊ㧗࠸ྍどගάᛶࡀⓎ⌧ࡍࡿࡔ
ࡅ࡛࡞ࡃࠊUV ගάᛶࡶቑ኱ࡍࡿࡇ࡜ࢆぢฟࡋࡓࠋ⌧
ᅾࠊ᪂つ࡞ྍどගᛂ⟅ᆺගゐ፹࡛࠶ࡿ㑄⛣㔠ᒓ㓟໬
≀ࢡࣛࢫࢱ࣮⾲㠃ಟ㣭 TiO2 ࡢ◊✲ࢆ㐍ࡵ࡚࠸ࡿࠋ
>@ ࣉࣛࢬࣔࣥගゐ፹
(1) Au ࢡࣛࢫࢱ࣮ᢸᣢ TiO2 ୖ࡟ Pt ࢆගᯒฟࡉࡏࡿࡇ
࡜࡟ࡼࡾࠊAu㸦ࢥ࢔࣮㸧㸫Pt㸦ࢩ࢙ࣝ㸧ᆺࣂ࢖࣓ࢱ
ࣜࢵࢡࢡࣛࢫࢱ࣮ࢆᙧᡂࡉࡏࡿࡇ࡜࡟ᡂຌࡋࡓࠋ
(2) ⌧ᅾࠊAu ࢼࣀ⢏Ꮚᢸᣢ༙ᑟయ࠿ࡽ࡞ࡿ᪂つྍど
ගᛂ⟅ᆺගゐ፹࡛࠶ࡿࠊࣉࣛࢬࣔࣥගゐ፹ࡢ◊✲ࢆ
ᒎ㛤ࡋ࡚࠸ࡿࠋ
⌧ᅾࠊAu ࢼࣀ⢏Ꮚ㸫㓟໬≀༙ᑟయ࢝ࢵࣉࣜࣥࢢ⣔
࠿ࡽ࡞ࡿ⾲㠃ࣉࣛࢬࣔࣥບ㉳ᆺྍどගගゐ፹ࡢ◊✲
ࢆᒎ㛤୰࡛࠶ࡿࠋ
>@ேᕤගྜᡂ
࢜ࣜࢪࢼࣝ࡞ගᯒฟἲࢆ⏝࠸࡚ࠊCdS-Au-TiO2 ୕ඖ࣊
ࢸࣟࢼࣀ᥋ྜ⣔ࢆᵓ⠏ࡍࡿࡇ࡜࡟ᡂຌࡋࠊࡇࢀ࡬ࡢ
ග↷ᑕ࡟ࡼࡾ CdS ࡜ TiO2 ࡢ஧ẁ㝵ບ㉳࡟ㄏ㉳ࡉࢀࡓ
TiO2ĺAuĺCdS ࡬ࡢ࣋ࢡࢺࣝⓗ࡞㟁Ꮚ⛣ືࡀ㉳ࡇࡿ
ࡇ࡜ࠊ༶ࡕᮏ⣔ࡀ඲ᅛయ Z-ࢫ࣮࣒࢟ࢆ㐩ᡂࡋ࡚࠸ࡿ
ࡇ࡜ࢆᐇドࡋࡓࠋ⌧ᅾࠊTiO2 ࢆࢼ࣮ࣟࢠࣕࢵࣉ༙ᑟ
య࡟⨨᥮ࡍࡿࡇ࡜࡛ࠊ඲ྍどගᛂ⟅ᆺࡢ୕ඖ࣊ࢸࣟ
᥋ྜ⣔ࡢ◊✲࡟ᒎ㛤ࡋ࡚࠸ࡿࠋ
>@ ኴ㝧㟁ụ
ගᯒฟἲࢆ⏝࠸࡚ࠊCdS QD ࢆ mp-TiO2 ୖ࡟ᢸᣢࡋࠊ
CdS QD/mp-TiO2( ග ࢔ ࣀ ࣮ ࢻ )ŇSx2-/S2-( 㟁ゎ
㉁)ŇSnO2(ᑐᴟ)ᆺࡢኴ㝧㟁ụࢆస〇ࡋࡓࠋSnO ⾲㠃
࡟ Au ࢼࣀ⢏Ꮚࢆᢸᣢࡍࡿࡇ࡜࡛ග㟁ኚ᥮ຠ⋡ࡀⴭ
ࡋࡃቑ኱ࡍࡿࡇ࡜ࢆぢฟࡋࡓࠋ
⌧ᅾࠊኚ᥮ຠ⋡ࡢ୍ᒙࡢྥୖࢆ┠ⓗ࡜ࡋ࡚◊✲ࢆ
⾜ࡗ࡚࠸ࡿࠋ
᭱㏆ࡢᴗ⦼‫ۑ‬ㄽᩥ‫ⴭ۔‬᭩
‫ ۑ‬H.
Tada,
T.
Soejima,
S.
Ito,
H. Kobayashi, J Am. Chem. Soc., , 126, 15952.
‫ ۑ‬H. Tada, S. Ito: Hiroaki Tada, T. Mitsui, T. Kiyonaga,
T. Akita, K. Tanaka: Nature Materials, , 5, 782.
‫ ۑ‬T. Kiyonaga, T. Akita, H. Tada: Chem.Commun.
(Cambridge, U. K.) , 2011.
‫ ۑ‬Hiroaki Tada, Tomokazu Kiyonaga, Shin-ichi Naya:
Chem. Soc. Rev., , 38, 1849.
‫ ۑ‬H. Tada, Q. Jin, H. Nishijima, H. Yamamoto, M.
Fujishima, S.-i. Okuoka, T. Hattori, Y. Sumida, H.
Kobayashi, Angew. Chem. Int. Ed.,, 50, 3501.
‫ ۑ‬H. Tada, M. Fujishima, H.i Kobayashi: Chem. Soc.
Rev., , 40, 4232.
‫ ۔‬H. Tada, T. Kiyonaga, S.-i. Naya, “Metal
Oxide-Supported Gold Nanoparticles - Size -Dependence
of Cataltyic Activities”, Lambert Academic Publishing,
Germany, .
‫⛉ ڦ‬Ꮫ◊✲㈝ ᇶ┙◊✲ (C)௦⾲⪅㸦ᖹᡂ16–17 ᖺᗘ 320 ୓෇㸧.
‫⛉ ڦ‬Ꮫ◊✲㈝ ᇶ┙◊✲ (B)௦⾲⪅
㸦ᖹᡂ20–22 ᖺᗘ 12350 ୓෇㸧
.
‫ ڦ‬ఫ཭㈈ᅋ◊✲ຓᡂ ௦⾲⪅㸦ᖹᡂ22-24 ᖺᗘ㸧
㸦200 ୓෇㸧.
‫ ڦ‬᪥ᮏᯈ◪ᏊᕤᏛຓᡂ ௦⾲⪅㸦ᖹᡂ22-23 ᖺᗘ㸧
㸦100 ୓෇㸧.

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