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Nanocluster photocatalyst using surface plasma resonance effect and electronic transmission synergistic effect and preparation method and application of nanocluster photocatalyst

A surface plasmon, resonance effect technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. problems such as low light absorption efficiency and low light absorption efficiency, to achieve good photocatalytic water splitting performance for hydrogen production, major application prospects, and mild preparation methods.

Active Publication Date: 2015-03-25
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After more than 40 years of development, the use of solar semiconductors to photocatalytically split water to produce hydrogen has made great progress, but the efficiency is still very low, and there is still a certain distance from practical applications (references Y.Tian, ​​T.Tatsuma, J .Am.Chem.Soc.2005,127,7632‐7637; Z.Seh, S.Liu, M.Low, S.‐Y.Zhang, Z.Liu, A.Mlayah, M‐Y.Han, Adv. Mater. 2012, 24, 2310–2314; J. Lee, S. Mubeen, X. Ji, G. D. Stucky, M. Moskovits, Nano Lett. 2012, 12, 5014-5019)
The lower light absorption efficiency of photocatalysts and the higher recombination efficiency of photogenerated electrons and holes are the two main reasons for the low efficiency of photocatalytic water splitting (references A.Fujishima, X.Zhang, D.A.Tryk, Surf.Sci .Rep.2008, 63,515‐582; G.K.Mor, K.Shankar, M.Paulose, O.K.Varghese, C.A.Grimes, Nano Lett.2005, 5, 191–195; K.Zhu, N.R.Neale, A.Miedaner, A.J.Frank, Nano Lett. 2007, 7, 69–74)

Method used

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  • Nanocluster photocatalyst using surface plasma resonance effect and electronic transmission synergistic effect and preparation method and application of nanocluster photocatalyst
  • Nanocluster photocatalyst using surface plasma resonance effect and electronic transmission synergistic effect and preparation method and application of nanocluster photocatalyst
  • Nanocluster photocatalyst using surface plasma resonance effect and electronic transmission synergistic effect and preparation method and application of nanocluster photocatalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of reference samples:

[0038] Preparation of CdSe nanocluster photocatalyst:

[0039]At room temperature, 1 ml of cyclohexane dispersed with 3nm CdSe nanocrystals and 10 ml of sodium dodecyl sulfate (SDS) aqueous solution were used to form a microemulsion under ultrasonic conditions. The ultrasonic power was 20%, and the ultrasonic power was 5 min. Wherein, the concentration of CdSe in the cyclohexane dispersion is 5 mg / ml, and the concentration of sodium lauryl sulfate in the aqueous solution is 3 mg / ml. The microemulsion was heated at 343K for 4h, separated and dried to obtain the CdSe nanocluster photocatalyst.

[0040] CdSe / TiO 2 Preparation of Nanocluster Photocatalyst:

[0041] At room temperature, 1ml was dispersed with 3nm CdSe nanocrystals and 10nm TiO 2 The nanorod cyclohexane and 10 ml of sodium dodecyl sulfate (SDS) aqueous solution form a microemulsion under ultrasonic conditions, the ultrasonic power is 20%, and the ultrasonic is 5 min. A...

Embodiment 2

[0053] Repeat the preparation of the target sample in Example 1, the difference is only that the solubility of Au nanocrystals is 0.5mg / ml, and Au / CdSe / TiO can still be obtained 2 Nanocluster photocatalysts.

Embodiment 3

[0055] Repeat the preparation of the target sample in Example 1, the only difference is that the solubility of Au nanocrystals is 1.5mg / ml, and Au / CdSe / TiO can still be obtained 2 Nanocluster photocatalysts.

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Abstract

The invention discloses a nanocluster photocatalyst using surface plasma resonance effect and electronic transmission synergistic effect. The nanocluster photocatalyst comprises at least three inorganic nanocrystals, wherein the first is the inorganic nanocrystal with surface plasma resonance effect, the second is the inorganic nanocrystal with overlapping absorption with the inorganic nanocrystal with surface plasma resonance effect, and the third is the inorganic nanocrystal with the electronic transmission effect; the at least three inorganic nanocrystals are assembled to obtain the nanocluster photocatalyst; the grain size of the inorganic nanocrystal is 1-100nm; the diameter of the nanocluster photocatalyst is 50-1000nm. The nanocluster photocatalyst has the features of being simple, efficient, adjustable in size and components, and has important significance in actual application. The invention further discloses a preparation method and application of the nanocluster photocatalyst.

Description

technical field [0001] The invention relates to the field of nanomaterials and their preparation, more specifically to a nanocluster photocatalyst utilizing the synergistic effect of surface plasmon resonance and electron transport, its preparation method and application. Background technique [0002] Due to the unsustainability of fossil fuels themselves, and the large amount of CO released by burning fossil fuels 2 Greenhouse effect, environmental pollution and other serious global problems, building a clean, environmentally friendly non-fossil fuel renewable new energy system has become the focus of great attention and a major strategy for countries all over the world. Due to its inexhaustible, clean and non-polluting, renewable and other advantages, solar energy will surely occupy a pivotal position in the development of new energy in the future. Hydrogen energy has the advantages of high combustion value, and the combustion product is water without environmental pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057B01J27/04B01J23/89B01J27/045C01B3/04
CPCY02E60/36
Inventor 张铁锐曹寅虎吴骊珠佟振合
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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