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A method for simultaneously degrading biomass and photodegrading water to produce hydrogen

A biomass and light-induced technology, applied in chemical instruments and methods, hydrogen production, light water/sewage treatment, etc., to achieve high hydrogen production efficiency, good system stability, pollution-free degradation and comprehensive utilization

Active Publication Date: 2021-06-25
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Little attention has been paid to the electron sacrificial body in the system. Currently, the electron sacrificial bodies commonly used are triethylamine, triethanolamine, ascorbic acid, etc., while some biomass such as amino acids, especially melamine, which is carcinogenic, are rarely mentioned. and

Method used

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  • A method for simultaneously degrading biomass and photodegrading water to produce hydrogen

Examples

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Effect test

Embodiment 1

[0021] Add 10mL of MPA-CdSe QDs with an average particle size of 4nm, 1mg of cobalt dichloride, and 178mg of 3-aminopropionic acid into the pyrex test tube, mix well, and adjust the pH of the system to 11 with 0.1mol / L NaOH solution. In the system, 3- The concentration of aminopropionic acid is 0.2mol / L, the concentration of cadmium ion is 2.5×10 -4 mol / L, the concentration of cobalt dichloride is 4.2×10 -4 mol / L; make the system in a sealed nitrogen atmosphere, inject 500 μL of methane as an internal standard, and use a 420nm LED lamp to irradiate for 6 hours, and monitor the hydrogen produced by the gas chromatography system (such as figure 1 shown). Due to some errors in the quantification of gas chromatography, the hydrogen gas produced was quantified by the drainage method, and the results showed that the rate of hydrogen gas generation in this system reached 68 μmol h -1 ·mg -1 , 3-aminopropionic acid degradation rate of 83%.

Embodiment 2

[0023] In this example, the MPA-CdSe QDs in Example 1 were replaced with equimolar MUA-CdSe QDs, and other steps were the same as in Example 1.

Embodiment 3

[0025] In this example, the 3-aminopropionic acid in Example 1 was replaced with an equimolar amount of 4-aminobutyric acid, and other steps were the same as in Example 1. The system can generate hydrogen at a rate of 102 μmol h -1 ·mg -1 , 4-aminobutyric acid degradation rate as high as 87%.

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Abstract

The invention discloses a method for simultaneously degrading biomass and photodegrading water to produce hydrogen. Biomass is used as an electron sacrificial body, water-soluble cadmium selenide or cadmium sulfide quantum dots are used as photosensitizers, and inorganic salts of cobalt or nickel are used as catalysts. Visible light in the aqueous phase system drives water splitting to produce hydrogen, and at the same time realizes the photodegradation of biomass containing amino groups. The components used in the photocatalytic hydrogen production system of the present invention are cheap and easy to obtain, do not require complex synthesis and purification, and have high hydrogen production efficiency. At the same time, no precious metal materials such as platinum and rhodium are used as co-catalysts, and the system has good stability, which is beneficial to practical use. production applications. More importantly, the use of biomass as the electron sacrificial body realizes the pollution-free degradation and comprehensive utilization of biomass.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production by photocatalytic reduction of water, and in particular relates to a method for photoinduced hydrogen production using biomass as an electron sacrificial body, and at the same time realizes the degradation of biomass. Background technique [0002] Due to the increasingly serious energy crisis, environmentally friendly hydrogen energy has attracted much attention. However, due to the huge energy consumption and serious pollution of traditional hydrogen production methods, the use of environmentally friendly solar energy to produce hydrogen has become a hot topic of widespread concern (Nature2001, 414, 625 ; Int. J. Hydrogen Energy. 2007, 32, 2673). Since the last century, chemists have been working on how to efficiently use solar energy to split water and produce hydrogen on a large scale. However, water splitting still faces huge challenges. [0003] To realize photoinduced hydrogen p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/04C02F1/30
CPCC01B3/042C02F1/30C02F2101/38Y02E60/36
Inventor 王红艳胡桂林雷又嘉
Owner SHAANXI NORMAL UNIV
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