계층화 된 티탄 투명 필름의 층간 공간에서 집계하지 않고 금 나노 입자의 제자리 합성에
Summary
여기서는 AuNPs의 응집이없는 티탄산 적층 필름의 층간 공간 내에서 금 나노 입자 (AuNPs)의 원위치에서의 합성을위한 프로토콜을 제시한다. 어떤 스펙트럼 변화도 사개월 후 관찰되지 않았다. 합성 된 물질은 촉매, 광촉매 및 경제적 플라즈몬 장치의 개발에 응용이 예상되었다.
Abstract
Combinations of metal oxide semiconductors and gold nanoparticles (AuNPs) have been investigated as new types of materials. The in situ synthesis of AuNPs within the interlayer space of semiconducting layered titania nanosheet (TNS) films was investigated here. Two types of intermediate films (i.e., TNS films containing methyl viologen (TNS/MV2+) and 2-ammoniumethanethiol (TNS/2-AET+)) were prepared. The two intermediate films were soaked in an aqueous tetrachloroauric(III) acid (HAuCl4) solution, whereby considerable amounts of Au(III) species were accommodated within the interlayer spaces of the TNS films. The two types of obtained films were then soaked in an aqueous sodium tetrahydroborate (NaBH4) solution, whereupon the color of the films immediately changed from colorless to purple, suggesting the formation of AuNPs within the TNS interlayer. When only TNS/MV2+ was used as the intermediate film, the color of the film gradually changed from metallic purple to dusty purple within 30 min, suggesting that aggregation of AuNPs had occurred. In contrast, this color change was suppressed by using the TNS/2-AET+ intermediate film, and the AuNPs were stabilized for over 4 months, as evidenced by the characteristic extinction (absorption and scattering) band from the AuNPs.
Introduction
각종 귀금속 나노 입자 (MNPS) 인해 국소 표면 플라즈몬 공명 (LSPR) 속성 특성 색상 또는 색조를 나타내고; 따라서, MNPS 여러 광학 및 / 또는 광화학 1-4 애플리케이션에 사용될 수있다. 최근, 금속 산화물 반도체 등의 산화 티탄 (TiO2)과 같은 MNPS (MOS) 광촉매, 조합 충분히 광촉매 5-14 새로운 형태로 조사되었다. 가장 MOS 입자는 상대적으로 낮은 표면적을 가지고 있기 때문에, 많은 경우에서 MNPS 극소량은 MOS 표면에 존재한다. 한편, 적층 된 금속 산화물 반도체 (LMOSs) 광촉매 특성을 나타내는 큰 표면적 LMO에 15-17의 단위 g 당 일반적으로 수백 평방 미터가있다. 또한, 다양한 LMOSs는 인터 특성 (즉, 다양한 화학 종들은 팽창성 대형 층간 공간 내에 수용 될 수 있음)이 15 ~ 20. 따라서, MNPS LMOSs과의 조합으로, 이는 MNPS 비교적 많은 양의 상기 반도체 광촉매 혼성화되는 것으로 예상된다.
(; TNS 16-30 티타니아 나노 시트) 투명 필름 매우 간단한 단계를 통해 우리는 구리 나노 입자 (CuNPs) LMO의 층간 공간 내에서 21의 현장 합성의 첫 번째를보고했다. 하지만, 합성 절차의 세부 사항 및 기타 귀금속 및 MNPS TNS 하이브리드의 특성은 아직보고되지 않았다. 또한, TNS 층 내의 CuNPs 쉽게 산화되어 주위 조건 하에서 21 탈색 하였다. 이에 따라 AuNPs 널리 다양한 광학, 광 화학적 및 촉매 적 용도로 사용되기 때문에, 금 나노 입자 (AuNPs)에 집중하고, 그들이 산화 3-5,7,8,10-14 대하여 상대적으로 안정 될 것으로 예상 , 28,31,32. 여기서 우리는 TNS와 쇼 그쪽의 층간 공간에 AuNPs의 합성을보고t 2 ammoniumethanethiol (2-AET +도 1 삽입)는 TNS의 층간 내 AuNPs에 대한 보호 시약으로 효과적으로 작동합니다.
Protocol
Representative Results
Discussion
이 원고는 TNS 필름의 층간 공간 내에서 금 나노 입자 (AuNPs)의 현장에서 합성을위한 상세한 프로토콜을 제공합니다. 이 TNS의 층간 공간 내 AuNPs의 제자리 합성의 첫 번째보고이다. 또한, 우리는 2 AET +는 TNS의 층간 내 AuNPs에 대한 효과적인 보호 시약으로 작동하는 것을 발견했다. 이러한 방법은 AuNPs와 TNS 투명 필름을 하이브리드. 프로토콜 절에 제시된 양호한 광학 투명도 21…
Divulgazioni
The authors have nothing to disclose.
Acknowledgements
This work was partly supported by Nippon Sheet Glass Foundation for Materials Science and Engineering and JSPS KAKENHI (Grant-in-Aid for Challenging Exploratory Research, #50362281).
Materials
| Methyl viologen dichloride | Aldrich Chemical Co., Inc. | 1910-42-5 | |
| Tetrabutylammonium hydroxide | TCI | T1685 | |
| cesium carbonate | Kanto Chemical Co., Inc. | 07184-33 | |
| anatase titanium dixoide | Ishihara Sangyo Ltd. | ST-01 | |
| hydrochloric acid | Junsei Chemical Co., Ltd. | 20010-0350 | |
| sodium hydroxide | Junsei Chemical Co., Ltd. | 195-13775 | |
| Tetrachloroauric(III) acid trihydrate | Kanto Chemical Co., Inc. | 17044-60 | |
| sodium tetrahydroborate | Junsei Chemical Co., Ltd. | 39245-1210 | |
| 2-ammoniumethanethiol hydrochloride | TCI | A0296 | |
| Ultrapure water (0.056 µS/cm) | Milli-Q water purification system (Direct-Q® 3UV, Millipore) | ||
| Microscope slide (Thickness : 1.0∼1.2 mm) | Matsunami glass Co., Ltd. | ||
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