Nanometer photo-catalyst used in producing hydrogen by decomposing water under visible light response and application of nanometer photo-catalyst

A nano-photocatalyst and visible light technology, which is applied in the field of solar photocatalytic hydrogen production, can solve the problems of low energy consumption for environmental protection, poor sunlight utilization, and low efficiency of sensitizers, so as to save costs, realize recycling, and have good product purity Effect

Inactive Publication Date: 2014-09-10
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst is novel in structure, cheap and easy to obtain, simple in the preparation process, environmentally friendly and low in energy consumption, and is suitable for large-scale preparation. It provides a new nano-photocatalytic material construction method and structure for the current field of solar photocatalytic water splitting hydrogen production, which is realistic and practical. It has broad application prospects, and at the same time provides new ideas and important references for the construction of high-efficiency photocatalysts that respond to visible light, so as to improve the poor utilization of sunlight and the low efficiency of sensitizers in traditional semiconductor materials

Method used

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  • Nanometer photo-catalyst used in producing hydrogen by decomposing water under visible light response and application of nanometer photo-catalyst
  • Nanometer photo-catalyst used in producing hydrogen by decomposing water under visible light response and application of nanometer photo-catalyst
  • Nanometer photo-catalyst used in producing hydrogen by decomposing water under visible light response and application of nanometer photo-catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Select N-dodecyl-N'-dimethylamino-p-benzyl-perylenediimide as the π-conjugated organic molecule, where dimethylamino-p-benzyl is the electron donor Group, with chloroform as a good solvent and methanol as a poor solvent, the specific steps are as follows:

[0037] Preparation of one-dimensional nanofiber 4 as a skeleton:

[0038] Slowly inject 500 ml of methanol into a beaker containing 100 ml of chloroform solution containing 0.025 g of N-dodecyl-N'-dimethylamino-p-benzyl-perylene diimide, and seal it with a The membrane was sealed and left to stand for 24 hours at a constant temperature of 20°C to finally obtain a stable dispersion of N-dodecyl-N'-dimethylamino-p-benzyl-perylenediimide nanofibers, Wherein used chloroform and methyl alcohol are the anhydrous solvents that adopt solvent distillation device to refine;

[0039] Surface coated titanium dioxide inorganic semiconductor nano-layer 2:

[0040] Under nitrogen protection and magnetic stirring, in the chlorofo...

Embodiment 2

[0044] Select N-dodecyl-N'-dimethylamino-p-phenyl-perylene diimide as the π-conjugated organic molecule, where dimethylamino-p-phenyl is the electron donor Group, take chloroform as a good solvent and methanol as a poor solvent, and the specific operation steps are carried out according to Example 1:

[0045] Preparation of one-dimensional nanofiber 4 as a skeleton:

[0046] Slowly inject 500 ml of methanol into a beaker containing 100 ml of chloroform solution containing 0.025 g of N-dodecyl-N'-dimethylamino-p-phenyl-perylene diimide, and seal it with a The membrane was sealed and left to stand for 24 hours at a constant temperature of 20°C to finally obtain a stable dispersion of N-dodecyl-N'-dimethylamino-p-phenyl-perylenediimide nanofibers, Wherein used chloroform and methyl alcohol are the anhydrous solvents that adopt solvent distillation device to refine;

[0047] Surface coated titanium dioxide inorganic semiconductor nano-layer 2:

[0048] Under nitrogen protection...

Embodiment 3

[0052] Choose N-dodecyl-N'-pyridyl-p-phenyl-perylene diimide as the π-conjugated organic molecule, where pyridyl-p-phenyl is the electron-donating group, and trichloro Methane is a good solvent and methanol is a poor solvent, and the specific operation steps are carried out according to Example 1:

[0053] Preparation of one-dimensional nanofiber 4 as a skeleton:

[0054] Slowly inject 500 ml of methanol into a beaker containing 100 ml of chloroform containing 0.025 g of N-dodecyl-N'-pyridyl-p-phenyl-perylenediimide, seal it with parafilm and Standing for 24 hours in a constant temperature environment of 20°C, the dispersion of stable N-dodecyl-N'-pyridyl-p-phenyl-perylenediimide nanofibers was finally obtained, in which chloroform and Methanol is an anhydrous solvent refined by a solvent distillation device;

[0055] Surface coated titanium dioxide inorganic semiconductor nano-layer 2:

[0056] Under nitrogen protection and magnetic stirring, in the chloroform / methanol dis...

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Abstract

The invention discloses a nanometer photo-catalyst used in producing hydrogen by decomposing water under visible light response and application of the nanometer photo-catalyst. The catalyst is a nanocomposite which is formed by taking a one-dimensional organic semiconductor nanofiber as a framework, coating the surface of the framework with an inorganic semiconductor titanium dioxide nanolayer and uniformly loading platinum nanoparticles, wherein the organic semiconductor nanofiber is prepared by self-assembling super molecules of perylene diimide and cycle-expanding derivatives, naphthalene diimide derivatives or hexabenzobenzene diimide derivatives with the photochemical stability, D-A structures and visible light response, then titanium dioxide is directly loaded in situ in a body phase organic solution and platinum is reduced and deposited through ultraviolet light in a photo-catalysis aqueous solution system. The catalyst is novel in structure, low in cost and available; the preparation process of the catalyst is simple, environmentally-friendly, low in energy consumption and suitable for preparation in scales; the catalyst is capable of decomposing water in the visible light to prepare the hydrogen, has the actual and wide application prospects in preparation of the hydrogen through decomposing the water in solar light and provides a novel idea and an important reference for forming an efficient photo-catalyst responding to the visible light.

Description

technical field [0001] The invention belongs to the field of solar photocatalytic hydrogen production, and in particular relates to a photocatalytic hydrogen production nanocomposite material with visible light response and its application. Background technique [0002] Hydrogen energy is a high-efficiency green energy. How to efficiently and cost-effectively produce hydrogen on a large scale is a key factor restricting its application. Among the many hydrogen production technologies, the use of inexhaustible solar energy to directly photocatalytically split water to produce hydrogen is a key factor. The cheapest, greenest and most promising route. Therefore, since its appearance in the 1970s, it has been highly concerned by developed countries such as Japan, the United States, and the European Union. There are thousands of related research papers and patents. How to obtain efficient, stable and low-cost photocatalysts and design photocatalytic systems and related theories ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J21/06B01J35/06C01B3/04B82Y30/00B82Y40/00
CPCY02E60/364Y02E60/36
Inventor 王传义陈帅李英宣
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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