ㄽᩥᑂᰝࡢせ᪨༤ኈࡢᑓᨷศ㔝ࡢྡ⛠༤ ኈ㸦 ⌮Ꮫ 㸧Ꮫ఩ᤵ୚ࡢせ௳Ꮫ఩つ๎➨ 4 ᮲➨ձ࣭2 㡯ヱᙜẶྡ

BANGUN SATRIO NUGROHOㄽᩥ㢟┠Synthesis, Properties of Graphene Oxide, Graphene Oxide Quantum Dots, and Its
Composite: A Cesium Detector for Environmental Monitoring㸦㓟໬ࢢࣛࣇ࢙ࣥࠊ㓟໬ࢢࣛࣇ࢙ࣥ㔞Ꮚࢻࢵࢺࠊࡑࡢ」ྜయࡢྜᡂ࡜ᛶ㉁㸸⎔ቃࣔࢽࢱࣜࣥࢢࡢࡓࡵࡢࢭࢩ᳨࣒࢘ฟჾ㸧ㄽᩥᑂᰝᢸᙜ⪅୺  ᰝ   ᩍ ᤵ  ୰ᓥ ぬ㸦⮬↛⛉Ꮫ◊✲ᨭ᥼㛤Ⓨࢭࣥࢱ࣮㸧ᑂᰝጤဨ   ᩍ ᤵ  ஭ୖ ඞஓ                 ᑂᰝጤဨ   ᩍ ᤵ  Ỉ⏣ ຮ                  ᑂᰝጤဨ   ᩍ ᤵ  ▼ᆏ ᫀྖ                 ࠝㄽᩥᑂᰝࡢせ᪨ࠞ 2011 ᖺ 3 ᭶࡟Ⓨ⏕ࡋࡓᮾி㟁ຊ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤࡢ஦ᨾ࡛ࡣ㸪⎔ቃ୰࡟኱㔞ࡢᨺᑕᛶ≀㉁ࡀᨺฟࡉࢀࡓࠋࡑࡢ୰࡛ࡶ 137Cs ࡣ኱㔞࡟ᨺฟࡉࢀ㸪30.2 ᖺ࡜㛗࠸༙ῶᮇࢆᣢࡘࡓࡵ࡟㸪ࡑࢀࡀ⎔ቃ୰࡛⛣⾜ࡋ࡚㣧ࡳỈࡢ୰࡟ΰධࡍࡿྍ⬟ᛶࡀ࠶ࡿࠋࡇࡢ 137Cs ࢆ྾╔ࡍࡿᮦᩱࡣ᪤࡟▱ࡽࢀ࡚࠸ࡿࡀࠊ᪂ࡓ࡞ᮦᩱࢆ㛤ᣅࡍࡿࡇ࡜ࡣ㔜せ࡛࠶ࡿࠋࡲࡓ᪂ࡓ࡟ 137Cs ࢆ᳨ฟ࡛ࡁࡿᮦᩱࡢ㛤Ⓨࡶ㔜せ࡛࠶ࡿࠋࡇࢀࡽࡢ◊✲ࡣ໬Ꮫࡀ㈉⊩࡛ࡁࡿ࡜ࡇࢁ࡛࠶ࡾࠊࡲࡓ㸪ᨺᑕ⥺⅏ᐖ᚟⯆ࢆ᥎㐍ࡍࡿࣇ࢙ࢽࢵࢡࢫ࣮ࣜࢲ࣮⫱ᡂࣉࣟࢢ࣒ࣛ࡟࡜ࡗ࡚㔜せ࡞◊✲ㄢ㢟࡛࠶ࡿࠋ 㓟໬ࢢࣛࣇ࢙ࣥ㸦GO㸧ࡣ⾲㠃ࡸ࢚ࢵࢪ࡟Ỉ㓟ᇶࡸ࢝ࣝ࣎࢟ࢩࣝᇶ࡞࡝ࡢᐁ⬟ᇶࢆከࡃᣢ
ࡘࡓࡵࡇࢀࢆ⏝࠸ࡿࡇ࡜࡜ࡋࡓࠋࡉࡽ࡟ࢻ࣮ࢯࣥᆺ࣏ࣜ࢜࢟ࢯ࣓ࢱ࣮ࣛࢺ㸦POM㸧ࡸࢭࢩ࣒࢘ࢢ࣮ࣜࣥ㸦C32H33NO8㸧࡜ GO ࡜ࡢࢼࣀ」ྜయࢆ⏝࠸࡚ࢭࢩ࣒࢘ࡢ྾╔ࡸ᳨ฟࡢ᳨ウࢆ⾜ࡗࡓࠋ 㓟໬ࢢࣛࣇ࢙ࣥࡣಟṇ Hummers ἲࢆ⏝࠸࡚ྜᡂࡋࡓࠋ㓟໬ࡢ㐍ࡵ᪉ࡢ㐪࠸࡟ࡼࡾࠊⅣ⣲
ࡢ๭ྜࡀከ࠸㓟໬ࢢࣛࣇ࢙ࣥ࡜Ⅳ⣲ࡢ๭ྜࡀᑡ࡞࠸㓟໬ࢢࣛࣇ࢙ࣥࢆసࡾศࡅࡿࡇ࡜ࡀ࡛
ࡁࡓࠋࡇࢀࡽࡢ㓟໬ࢢࣛࣇ࢙ࣥ࡜ࢻ࣮ࢯࣥᆺ POM ࢆΰྜࡍࡿࡇ࡜࡟ࡼࡾ」ྜయ㸦GOPOM」ྜయ㸧ࢆྜᡂࡋࡓࠋTEM eds ࡛ W, O, C ࡢඖ⣲ࡢศᕸࢆほᐹࡍࡿࡇ࡜࡟ࡼࡾᆒ୍࡞ࢼࣀ」ྜయ࡜࡞ࡗ࡚࠸ࡿࡇ࡜ࢆ☜ㄆࡋࡓࠋ GOࠊPOMࠊGOPOM 」ྜయࢆ⏝࠸࡚ሷ໬ࢭࢩ࣒࢘㸦CsCl㸧ࡢ྾╔ヨ㦂ࢆ⾜ࡗࡓࠋGOࠊ
POM ࡜ࡶ CsCl ࢆ྾╔ࡍࡿࡀࠊGO-POM 」ྜయ࡛ࡣ྾╔㔞ࡀ GOࠊPOM ༢⊂ࡼࡾࡶቑຍࡍ
ࡿࡇ࡜ࡀศ࠿ࡗࡓࠋࡲࡓ GO ࡟ CsCl ࢆ྾╔ࡍࡿ࡜จ㞟ࡀ㉳ࡁࡿࡇ࡜ࢆほᐹࡋࡓࠋࡲࡓ SEM
ᐃࡼࡾࠊCsCl ࡜⪃࠼ࡽࢀࡿ⢏ࡀ⏕ࡌ࡚࠸ࡓࠋCsCl ࡢ྾╔ᚋࠊGO ཬࡧ GO-POM ࡢ TEMほᐹࢆ⾜ࡗࡓࠋ㯮Ⰽࡢࢫ࣏ࢵࢺࡀほࡉࢀࠊeds ࡼࡾࢭࢩ࣒࢘ࡢᏑᅾࡀㄆࡵࡽࢀࡓࠋ㟁Ꮚ⥺↷ᑕ࡟ࡼࡿ┤᥋㑏ඖࡢ⤖ᯝ⏕ᡂࡋࠊࢭࢩ࣒࢘ࡢࢡࣛࢫࢱ࣮࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ⢊ᮎ X⥺ᅇᢡᐃࢆ⾜ࡗࡓࠋపゅᗘഃ࡟ほࢱ࣮ࣥࡀほࡉࢀࡓᅇᢡࡀࢭࢩ࣒࢘ࢆ྾╔ࡍࡿ࡜ᾘ࠼ࠊࣁ࣮ࣟࣃࡉࢀࡿࡼ࠺࡟࡞ࡗࡓࠋࡇࢀࡣࢭࢩ࣒࢘ࢆ྾╔ࡍࡿ࡜⤖ᬗᛶࡀᝏࡃ࡞ࡗ࡚࢔ࣔࣝࣇ࢓ࢫ≧࡟࡞ࡗࡓࡓࡵ࡜⪃࠼ࡽࢀࡓࠋࡲࡓࠊ࣐ࣛࣥࢫ࣌ࢡࢺࣝࡢ 2D ࣂࣥࢻࡀࢭࢩ࣒࢘྾╔࡟ࡼࡾኚ໬ࡋࡓࠋ ḟ࡟ GO ࡜ࢭࢩ࣒࢘ࢢ࣮ࣜࣥ㸦CG㸧ࡢࢼࣀ」ྜయࡢ◊✲ࢆ⾜ࡗࡓࠋࡲࡎ GO ࢆ⏝࠸࡚ GO 㔞Ꮚࢻࢵࢺ㸦GOQDs㸧ࢆྜᡂࡋࡓࠋ⏝࠸ࡓ GO ࡣⅣ⣲ࡢ๭ྜࡀప
࠸ࡶࡢࢆ⏝࠸ࡓࠋTEM ほᐹ࡟ࡼࡾ GO ࡣࡋࢃࡀᐤࡗࡓᙧ≧ࢆࡋ࡚࠾ࡾࠊࡑࢀࡽࡀ㔜࡞ࡾྜࡗ࡚࠸ࡓࠋࡇࡢ GO ࡟ NaOH Ỉ⁐ᾮࢆຍ࠼࡚㑏ὶࢆ⾜ࡗࡓࠋTEM ほᐹ࡟ࡼࡾࠊGO ୖ࡟ᩘnm ࢧ࢖ࢬࡢ㓟໬ࢹࣈࣜ࡜࿧ࡤࢀࡿࡶࡢࡀほᐹࡉࢀࡓࠋࡇࢀࡀ GOQDs ࡛࠶ࡾࠊཌࡉࡣ AFM
ᐃ࡟ࡼࡾ 1.5 nm㹼2.0 nm ⛬ᗘ࡛࠶ࡗࡓࠋ ྾཰ࢫ࣌ࢡࢺࣝࢆ ᐃࡋࡓࠋGOQDs ࡣ 800 nm ࠿ࡽ 200 nm ࡟࠿ࡅ࡚ࣈ࣮ࣟࢻ࡞྾཰ࢆ♧ࡋࠊ205 nm ࡟ࣆ࣮ࢡࢆࠊࡑࡋ࡚ 270 nm ࡜ 330 nm ࡟ࢩࣙࣝࢲ࣮㸦྾཰㸧ࢆᣢࡗ࡚࠸ࡓࠋ GOQDs ࡢⓎගࢫ࣌ࢡࢺࣝࢆ ᐃࡋࡓࠋⓎගᙉᗘࡣ㓟ᛶ᮲௳ୗ࡜ሷᇶᛶ᮲௳ୗ࡛␗࡞ࡗ࡚࠸ࡓࠋࡍ࡞ࢃࡕ㓟ᛶ᮲௳ୗ࡛ࡣᙉᗘࡀᙉࡃࠊሷᇶᛶ᮲௳ୗ࡛ࡣᙉᗘࡀᙅ࠿ࡗࡓࠋࡇࢀࡣ᪤࡟ሗ࿌ࡉࢀ࡚࠸ࡿࣉࣟࢺࣥ໬ࠊ⬺ࣉࣟࢺࣥ໬ࠊ࠶ࡿ࠸ࡣ࢚࣏࢟ࢩ໬࡜㛵ಀࡋ࡚࠸ࡿࠋࡲࡓሷᇶᛶ࠿ࡽ㓟ᛶ࡟ኚ࠼ࡿ࡜Ⓨග఩⨨ࡶ 435 nm ࠿ࡽ 454 nm ࡬ࢩࣇࢺࡋࡓࠋ
 GOQDsࢭࢩ࣒࢘ࢢ࣮ࣜࣥ(CG)」ྜయࡢⓎගࢫ࣌ࢡࢺࣝࢆ ᐃࡋࡓࠋ㓟ᛶ᮲௳ୗ࡛ࡣᵓ
ᡂᡂศࡢ㊊ࡋྜࢃࡏࡢⓎගࢫ࣌ࢡࢺࣝࢆ♧ࡋࡓࡀࠊሷᇶᛶ᮲௳ୗ࡛ࡣᙉᗘࡀ኱ኚᙉࡃ࡞ࡗࡓࠋ㓟ᛶ᮲௳ୗ࡛ࡣࠊGOQDs ࡜ CG ࡢ≀⌮ⓗ࡞ΰྜ≀࡜⪃࠼ࡽࢀࡓࡀࠊሷᇶᛶ᮲௳ୗ࡛ࡣ GOQDs ࡜ CG ࡢ㛫࡟໬Ꮫ⤖ྜࡀᙧᡂࡉࢀ࡚࠸ࡿ࡜⪃࠼ࡽࢀࡓࠋ
 CsCl Ỉ⁐ᾮࢆ⏝࠸࡚ GOQDs ཬࡧ GOQDsCG 」ྜయࡢ Cs ྾╔ᐇ㦂ࢆ㓟ᛶ᮲௳ୗ࡛⾜ࡗࡓࠋࡲࡎࠊGOQDs ࡟ Cs ࢆຍ࠼࡚࠸ࡃ࡜Ⓨගᙉᗘࡀᚎࠎ࡟ῶᑡࡋࡓࠋGOQD:CG ࡀ 5:1ࡢ」ྜయ㸦」ྜయ51㸧࡛ࡣࠊⓎගᙉᗘࡀ Cs 㔞ࡢቑຍ࡜࡜ࡶ࡟ቑຍࡋࡓࠋGOQD:CG ࡀ8:1 ࡢ」ྜయ㸦」ྜయ81㸧࡛ࡶྠᵝࡢᐇ㦂ࢆ⾜ࡗࡓࠋ᭱ึ Cs ࢆຍ࠼ࡓ᫬ࡣⓎගᙉᗘࡀᑡ
ࡋῶᑡࡋࡓࡀࠊCs 㔞ࢆቑຍࡉࡏࡿ࡜Ⓨගᙉᗘࡀቑຍࡋࡓࠋࡇࢀࡣࠊ」ྜయ81 ࡛ࡣ」ྜయ
-51 ࡼࡾࡶ GOQDs ࡢ๭ྜࡀ㧗࠸ࡓࡵ࡟ GOQDs ࡟ࡼࡿⓎගᙉᗘࡀῶᑡࡋࡓࡀࠊࡉࡽ࡟ቑຍࡍࡿ࡜」ྜయࡢຠᯝࡀ㢧ⴭ࡟ฟࡓࡓࡵ࡟Ⓨගᙉᗘࡀቑ኱ࡋࡓ࡜⪃࠼ࡽࢀࡓࠋTEM edsᐃ࡟ࡼࡾࠊCs ࡀᙉࡃほ ࡉࢀࡓࡀࠊCl ࡢᙉᗘࡀᙅ࠿ࡗࡓࠋ ሷᇶᛶ᮲௳ୗ࡛ GOQDs ཬࡧ GOQDsCG 」ྜయࡢ Cs ྾╔ᐇ㦂ࢆ⾜ࡗࡓࠋࡍ࡭࡚ࡢሙྜ࡛ࠊࢭࢩ࣒࢘ࢆຍ࠼࡚࠸ࡃ࡜Ⓨගᙉᗘࡀῶᑡࡍࡿࡇ࡜ࡀศ࠿ࡗࡓࠋ
 ẚ㍑ࡢࡓࡵ࡟ K+, Sr2+ࡢ྾╔ᐇ㦂ࢆ⾜ࡗࡓࠋ㓟ᛶ᮲௳ୗࠊK+ࡢῧຍ࡜࡜ࡶ࡟Ⓨගᙉᗘࡣῶᑡࡋࡓࠋ㓟ᛶ᮲௳ୗࠊSr2+ࢆῧຍࡍࡿ࡜᭱ึⓎගᙉᗘࡣቑຍࡋࠊࡉࡽ࡟ຍ࠼ࡿ࡜ῶᑡࡋ
ࡓࠋሷᇶᛶ᮲௳ୗ࡛ࡣ K+, Sr2+࡜ࡶྠᵝ࡟Ⓨගᙉᗘࡀῶᑡࡋࡓࠋ≉࡟ Sr2+࡟࠾࠸࡚㢧ⴭ࡛ࡼࡾᙉᅛ࡞㘒యࡀᙧᡂࡉࢀࡓ࡜⪃࠼ࡽࢀࡓࠋ ࢭࢩ࣒࢘㔠ᒓࡢࢼࣀ⢏Ꮚࡢ⏕ᡂᶵᵓ࡟ࡘ࠸࡚⪃ᐹࡋࡓࠋᚓࡽࢀࡓࢼࣀ⢏Ꮚࢆ TEM ほᐹࡍࡿ࡜ eds ࡛ Cs ࡜ Cl ࡀ 1:1 ࡢᙉᗘ࡛ほࡉࢀࡓࠋࡇࢀ࡟ࡉࡽ࡟㟁Ꮚ⥺ࢆ↷ᑕࡍࡿ࡜ࢼࣀ

⢏Ꮚࡢືࡁࡀほ ࡉࢀࡓࠋ㛗᫬㛫↷ᑕᚋࡢ eds

ᐃ࡛ࡣ Cl ࡀほ ࡉࢀࡎࠊCs 㔠ᒓࡀᚓࡽࢀࡓࠋࡇࢀࡣ㟁Ꮚ⥺↷ᑕ࡟ࡼࡿ┤᥋㑏ඖࡢ⤖ᯝ࡛࠶ࡿࠋ ࡇࡢࡼ࠺࡟ࠊࢭࢩ࣒࢘ࡢ྾╔࡜᳨ฟࡢほⅬ࠿ࡽࠊGO ཬࡧ GO-POM 」ྜయࠊGOQDs-CG」ྜయ࡟㛵ࡍࡿ≀㉁◊✲ࢆ⾜ࡗࡓࠋ௨ୖ㸪ᑂᰝࡢ⤖ᯝ㸪ᮏㄽᩥࡢⴭ⪅ࡣ༤ኈ㸦⌮Ꮫ㸧ࡢᏛ఩ࢆᤵ୚ࡉࢀࡿ༑ศ࡞㈨᱁ࡀ࠶ࡿ
ࡶࡢ࡜ㄆࡵࡿࠋ

බ⾲ㄽᩥ
1. Bangun Satrio Nugroho, Muh Nur Khoiru Wihadi, Fabian Grote, Siegfried Eigler,Satoru Nakashima, “Potentiality of graphene oxide and polyoxometalate as radionuclide
adsorbent to restore the environment after Fukushima disaster: A mini review”, Indones.
J. Chem., 21 (3), 776-786 (2021).
2. Bangun Satrio Nugroho, Akane Kato, Chie Kowa, Tomoya Nakashima, Atsushi Wada,

Muh Nur Khoiru Wihadi, Satoru Nakashima, “Exploration of Cs trapping phenomenon
by combining graphene oxide with K6P2W18O62 as Nanocomposite”, Materials, 14, 5577
(2021).
3. Bangun Satrio Nugroho and Satoru Nakashima, “Improvement of Cs detectionperformance and formation of CsCl and Cs nanoparticles by tuning graphene oxide
quantum dot-based nanocomposite”, RSC Adv., 12, 19667-19677 (2022).