Organic semiconductor visible light photocatalyst with membrane structure and preparation method and application thereof

A technology of organic semiconductors and photocatalysts, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., to reduce costs, increase separation efficiency, and improve utilization.

Active Publication Date: 2011-06-15
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although there are many applications of organic semiconductors, so far, this excellent material has not been applied to photocatalytic water splitting.
On the other hand, there is still a crucial issue about photocatalytic water splitting that remains unsolved. How to solve the limitations of inorganic semiconductors in photocatalytic water splitting, that is, how to find a large number of photocatalysts that can absorb visible light and at the energy level on the matching, but also has a relatively high stability of the catalyst

Method used

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  • Organic semiconductor visible light photocatalyst with membrane structure and preparation method and application thereof
  • Organic semiconductor visible light photocatalyst with membrane structure and preparation method and application thereof
  • Organic semiconductor visible light photocatalyst with membrane structure and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0041]

[0042] Perylenetetracarboxylic dianhydride [6,6]-phenyl-C 61 Methyl butyrate, Me is methyl

[0043] Utilize above-mentioned perylenetetracarboxylic dianhydride and [6,6]-phenyl-C 61 Methyl butyrate was used to prepare five different membranes from membranes a to d. The specific methods are as follows:

[0044] Preparation of membrane a:

[0045] (1) A quartz container with perylenetetracarboxylic dianhydride is placed in a crucible of a vacuum evaporation apparatus, and a 4×2cm conductive glass ITO is placed above the cavity of the vacuum evaporation apparatus, and then vacuumized to 1×10 -5 ~4×10 -5 Pa;

[0046] (2). On the vacuum vapor deposition apparatus of adjustment step (1), it is 1.5~1.8A to control the heating of the crucible that is loaded with perylene tetracarboxylic dianhydride to be 1.5~1.8A, heat perylene tetracarboxylic dianhydride, make perylene tetracarboxylic dianhydride Evaporate on the conductive glass ITO, and coat a layer of perylene te...

Embodiment 2

[0075] (1) Perylene tetracarboxylic dianhydride and [6,6]-phenyl-C 61 The two quartz containers of methyl butyrate are placed in the two crucibles of the same vacuum evaporator, and a 4×2 cm conductive glass ITO is placed above the cavity of the vacuum evaporator, and then vacuumed to 1×10 -5 ~4×10 -5 Pa;

[0076] (2). On the vacuum vapor deposition apparatus of adjustment step (1), it is 1.5A to control the heating current of the crucible loaded with perylene tetracarboxylic dianhydride to heat perylene tetracarboxylic dianhydride so that perylene tetracarboxylic dianhydride is vapor-deposited On the conductive glass ITO, plate a layer of perylene tetracarboxylic dianhydride film on the conductive glass ITO; at the same time, closely observe the film thickness monitor on the vacuum evaporation instrument, when the thickness of the perylene tetracarboxylic dianhydride film reaches 10 Stop coating when nanometer is reached;

[0077] (3). No need to take it out, and then cont...

Embodiment 3

[0081] (1) Perylene tetracarboxylic dianhydride and [6,6]-phenyl-C 61 The two quartz containers of methyl butyrate are placed in the two crucibles of the same vacuum evaporator, and a 4×2 cm conductive glass ITO is placed above the cavity of the vacuum evaporator, and then vacuumed to 1×10 -5 ~4×10 -5 Pa;

[0082] (2). On the vacuum vapor deposition apparatus of adjustment step (1), it is 1.8A to control the heating current of the crucible loaded with perylene tetracarboxylic dianhydride to heat perylene tetracarboxylic dianhydride so that perylene tetracarboxylic dianhydride is vapor-deposited On the conductive glass ITO, plate a layer of perylene tetracarboxylic dianhydride film on the conductive glass ITO; at the same time, closely observe the film thickness monitor on the vacuum evaporation instrument, when the thickness of the perylene tetracarboxylic dianhydride film reaches 30 Stop coating when nanometer is reached;

[0083] (3). No need to take it out, and then adju...

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Abstract

The invention belongs to the field of producing hydrogen by carrying out photocatalysis decomposition on water with visible light and particularly relates to an organic semiconductor visible light photocatalyst with a membrane structure and a preparation method and application thereof. The visible light photocatalyst consists of the following three layers of membranes: a perylene diimide derivative membrane layer serving as a first layer; a membrane layer of a mixture of a perylene diimide derivative and [6, 6]-phenyl-C61 methyl butyrate, which serves as a second layer; and a [6, 6]-phenyl-C61 methyl butyrate membrane layer serving as a third layer, wherein the thickness of the perylene diimide derivative membrane layer is in the range of 10 to 30 nanos; the thickness of the membrane layer of the mixture of the perylene diimide derivative and the [6, 6]-phenyl-C61 methyl butyrate is in the range of 25 to 45 nanos; the molar ratio of the perylene diimide derivative to the [6, 6]-phenyl-C61 methyl butyrate is in the range of 4:1 to 11.6:1; and the thickness of the [6, 6]-phenyl-C61 methyl butyrate membrane layer is in the range of 3 to 15 nanos. The photocatalyst can be excited in a visible light region to decompose water into hydrogen and oxygen with the assistance from an electric field. The organic semiconductor visible light photocatalyst with the membrane structure can be used for producing hydrogen which is clean energy.

Description

technical field [0001] The invention belongs to the field of visible light photocatalytic decomposition of water to produce hydrogen, and particularly relates to an organic semiconductor visible light photocatalyst with a membranous structure and a preparation method thereof, and the aspect of using the organic semiconductor visible light photocatalyst with a membranous structure to decompose water by photoelectrochemical catalysis to generate clean energy hydrogen Applications. Background technique [0002] Semiconductor photocatalytic water splitting is an advanced method of converting solar energy into chemical energy. Its mechanism of action is: under light, semiconductors are excited to generate photogenerated electrons and holes. The electrons and holes then diffuse to the surface of the semiconductor, where the electrons reduce the water to hydrogen and the holes oxidize the water to oxygen. The overall result of this change is that solar energy becomes chemical ener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J35/02C25B1/04
CPCY02E60/366Y02E60/36
Inventor 赵进才刘桂林陈春城籍宏伟马万红
Owner INST OF CHEM CHINESE ACAD OF SCI
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