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Visible light catalytic system with copper ion-thiol complex, preparation method, and hydrogen production method

A catalytic system and technology of mercaptan compounds, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., to increase hydrogen production rate, increase hydrogen production rate, increase Effect of photocatalytic hydrogen production rate

Active Publication Date: 2015-11-04
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

However, the hole consumption rate is equally important to the overall reaction rate, but there are few reports on the artificial simulation of hole consumption cocatalysts.
Therefore, it is still a great challenge to develop highly efficient artificial analog oxidation cocatalysts of non-noble metals.

Method used

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  • Visible light catalytic system with copper ion-thiol complex, preparation method, and hydrogen production method
  • Visible light catalytic system with copper ion-thiol complex, preparation method, and hydrogen production method
  • Visible light catalytic system with copper ion-thiol complex, preparation method, and hydrogen production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A visible light photocatalytic system containing a copper ion-thiol complex and a hydrogen production method thereof, comprising the following steps:

[0042] Add 20mL of deionized water to a 60mL quartz tube, take 5mg of cadmium selenide sample into the quartz tube with deionized water, and ultrasonicate for 2-10 minutes to obtain suspension A; add 1.89mmol cysteine ​​to suspension A Amino acid, sonicate for 2-5 minutes to obtain suspension B; then add 0.14 mg of copper ion-cysteine ​​complex to suspension B, and sonicate for 3-5 minutes to obtain solution C; so far we have obtained copper Ion-thiol complex visible light photocatalytic system. Then add N into the solution D 2 Gas for 20-30 minutes, and then sealed with a rubber stopper; in an inert gas atmosphere, the reactor was irradiated with visible light (λ>400 nanometers) for several hours, and the hydrogen produced was characterized by gas chromatography.

Embodiment 2

[0044] First, the Pt-loaded Sn 2 Nb 2 o 7 , use 60mL size quartz tube to mix 10mg Sn 2 Nb 2 o 7 The powder was dispersed in 20 mL of aqueous solution containing 20 vol% methanol, and then 25 μL of H 2 PtCl 6 solution (10mmol / L). Subsequently, the air in the quartz tube was exhausted with nitrogen exhaust for 30 minutes, then sealed with a rubber stopper, and then the mixed solution was stirred for 30 minutes under a 500 watt high-pressure mercury lamp (XPA-7photochemical reactor, Nanjing Xujiang Machine-electronic Plant). The temperature of the reaction system is cooled with circulating water to maintain room temperature. Finally, the resulting Pt / Sn 2 Nb 2 o 7 The catalyst is separated by centrifugation.

[0045] Repeat embodiment 1, its difference is only to change the 5mg cadmium selenide catalyst that adds into 10mg Pt / Sn 2 Nb 2 o 7 , the same high photocatalytic hydrogen production rate system can be obtained.

Embodiment 3

[0047] Repeat Example 1, the only difference is that the addition of 0.47 μmol copper ion-cysteine ​​complex is changed to 0.47 μmol copper nitrate, and the same high photocatalytic hydrogen production rate system can be obtained.

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Abstract

The present invention disclose a catalytic system of using visible light to photodecompose water to produce hydrogen, and particularly a visible light catalytic system with a copper ion-thiol complex, a preparation method, and a hydrogen production method. The system comprises the following raw materials: a semiconductor photocatalyst, a copper salt or a copper ion-thiol complex and a thiol compound. The preparation method comprises: using a semiconductor material as a photocatalyst; using a thiol compound as a hole consumption agent; adding a copper salt or copper ion-thiol complex; photodecomposing water to produce hydrogen under irradiation of visible light (lambda > 400 nm). The copper ion-thiol complex of the present invention has the effect of promoting hole transport and consumption in a semiconductor, and can increase efficiency of separation between photogenerated electrons and holes in a semiconductor photocatalytic system, thereby improving activity of the system in photodecomposing water to produce hydrogen. The present invention proposes the copper ion-thiol complex as a hole consumption cocatalyst in the photocatalytic system, and the cocatalyst is high in catalytic activity, simple in synthesis, low in raw material price, and recyclable.

Description

technical field [0001] The invention relates to a photocatalytic system and a preparation method thereof. More specifically, it relates to a visible light catalytic system containing a copper ion-thiol complex, a preparation method thereof, and a hydrogen production method. Background technique [0002] As a renewable secondary energy source, hydrogen energy has the advantages of wide sources, high calorific value, cleanliness, good combustion stability, and various forms. It is known as the ideal energy source in the 21st century (EP Melián, et al. Int. J. Hydrogen Energy, 2013, 38:2144-2155.). The traditional hydrogen production method needs to consume a large amount of primary energy, which increases the cost of hydrogen energy. At the same time, the environmental pollution of ore energy cannot be avoided in the process of hydrogen production, which greatly limits the application of hydrogen energy. As an inexhaustible and inexhaustible clean energy, solar energy can fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C01B3/04
CPCY02E60/36
Inventor 张铁锐彭勇尚露吴骊珠佟振合
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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