Catalyst, preparation method, photocatalytic system and method for reforming biomass and producing hydrogen based on quantum dots and metal sol

A metal sol, quantum dot technology, applied in chemical instruments and methods, physical/chemical process catalysts, non-metallic elements, etc., can solve the problems of low hydrogen production efficiency, poor system stability, and high metal consumption, and achieve good repeatability. , The effect of high utilization efficiency and simple operation

Active Publication Date: 2016-04-20
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can easily and quickly realize the in-situ preparation of high-efficiency semiconductor catalysts by quantum dots through visible light-driven photoreaction and catalytic reformation of biomass derivatives to produce hydrogen. However, these two methods have low hydrogen production efficiency and poor system stability. , the amount of metal is too much and other disadvantages

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  • Catalyst, preparation method, photocatalytic system and method for reforming biomass and producing hydrogen based on quantum dots and metal sol
  • Catalyst, preparation method, photocatalytic system and method for reforming biomass and producing hydrogen based on quantum dots and metal sol
  • Catalyst, preparation method, photocatalytic system and method for reforming biomass and producing hydrogen based on quantum dots and metal sol

Examples

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Embodiment 1

[0074] A catalyst based on quantum dots and metal sol, a preparation method, a photocatalytic system containing the catalyst and a method for reforming biomass and producing hydrogen, comprising the following steps:

[0075] Take 1.0mL CdSe / CdS quantum dot solution (CdSe / CdS quantum dot stock solution concentration is 0.80mg / mL), then add 1.0mL platinum sol aqueous solution (the original concentration of platinum sol is 4.5×10 -6mol / L) were mixed in a Pyrex test tube with a volume of 15.0 mL. Finally, 1.0mL triethylamine was added as biomass, and 2.0mL secondary water was added to make the volume to 5.0mL. The pH value at this time was measured to be 12.50, and it was placed in a sealed nitrogen atmosphere, using an LED lamp with a wavelength of 410nm Irradiate the Pyrex tube. During the reaction, the hydrogen generated in the reaction was detected by gas chromatography (TCD thermal conductivity detector).

[0076] Figure 10 It is a screenshot of the peak spectrum of the g...

Embodiment 2

[0078] A catalyst based on quantum dots and metal sol, a preparation method, a photocatalytic system containing the catalyst and a method for reforming biomass and producing hydrogen, comprising the following steps:

[0079] Take 1.0mL CdSe / CdS quantum dot solution (CdSe / CdS quantum dot stock solution concentration is 0.80mg / mL), then add 1.0mL platinum sol aqueous solution (the original concentration of platinum sol is 4.5×10 -6 mol / L) were mixed in a Pyrex test tube with a volume of 15.0 mL. Finally, 1.0mL triethylamine was added as biomass, and 2.0mL secondary water was added to make the volume to 5.0mL. The pH value at this time was measured to be 12.40, and it was placed in a sealed nitrogen atmosphere, using an LED lamp with a wavelength of 410nm Irradiate the Pyrex tube. During the reaction, the hydrogen generated in the reaction was detected by gas chromatography (TCD thermal conductivity detector).

[0080] Under the same conditions, take 1.0mL CdSe / CdS quantum dot ...

Embodiment 3

[0083] A catalyst based on quantum dots and metal sol, a preparation method, a photocatalytic system containing the catalyst and a method for reforming biomass and producing hydrogen, comprising the following steps:

[0084] Take 1.0mL CdSe / CdS quantum dot solution (CdSe / CdS quantum dot stock solution concentration is 0.80mg / mL), then add 1.0mL platinum sol aqueous solution (the original concentration of platinum sol is 4.5×10 -6 mol / L) were mixed in a Pyrex test tube with a volume of 15.0 mL. Finally, add 50.0mgL-cysteine, add 3.0mL secondary water to make the volume to 5.0mL, adjust the pH value to 10.00, and make it in a sealed nitrogen atmosphere, and irradiate the Pyrex test tube with an LED lamp with a wavelength of 410nm . During the reaction, the hydrogen generated in the reaction was detected by gas chromatography (TCD thermal conductivity detector).

[0085] Figure 13 It is the hydrogen production-time curve of photocatalytic reforming of L-cysteine ​​within 4.0 ...

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Abstract

The invention discloses a catalyst based on a quantum dot and metal sol. The catalyst comprises the quantum dot, the metal sol and biomass, wherein the quantum dot refers to a hybridization quantum dot consisting of IIB to VIA elements or a single-component quantum dot; the biomass refers to one or a mixture of more than two of amine or sulfydryl compounds. The invention further discloses a preparation method of the catalyst based on the quantum dot and the metal sol, a photocatalytic system containing the catalyst based on the quantum dot and the metal sol, and a biomass reforming and hydrogen manufacturing method. With the adoption of the system provided by the invention, the efficient photo-induced hydrogen manufacturing in a homogeneous phase or out-of-phase system can be realized; the simple operation, the good repeatability, the high use efficiency of visual light and the high photo-induced hydrogen manufacturing efficiency can be realized; compared with a quantum dot-metal salt solution system, the system has the advantages of better stability and less metal use amount (about one tenth of the former one).

Description

technical field [0001] The invention relates to a catalyst based on quantum dots and metal sol, a preparation method, a photocatalytic system containing the catalyst and a method for reforming biomass and producing hydrogen. Background technique [0002] In order to solve the sharp contradiction between the ever-increasing energy demand and the increasingly serious environmental pollution, people are exploring a variety of renewable energy sources. Among them, hydrogen energy has attracted more and more attention due to its unique advantages such as high calorific value, no pollution, and no greenhouse gas generation. Kawai et al [Nature, 1980, 286, 474-476; Chem. Lett. 1981, 81-84] proposed the use of Pt / RuO in the 1980s 2 / TiO 2 As a catalyst, use ultraviolet photocatalytic reforming of biomass derivatives in aqueous solution to produce hydrogen. In 2006, Guo et al. obtained CdS materials with special morphology through a new synthesis method, and then obtained CdS semi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/057B01J27/045C01B3/32
Inventor 吴骊珠李旭兵李治军李嘉欣王久菊
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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