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Application of ultrathin titanium dioxide nanosheet as photocatalyst in hydrogen production by decomposing lignocellulose through solar energy

A technology of lignocellulose and titanium dioxide, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, metal/metal oxide/metal hydroxide catalyst, etc., to achieve the effect of simple process, fast preparation and excellent photocatalytic hydrogen production performance

Pending Publication Date: 2022-02-01
HANGZHOU DIANZI UNIV
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Problems solved by technology

But TiO 2 The performance of photocatalysts needs to be further improved

Method used

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  • Application of ultrathin titanium dioxide nanosheet as photocatalyst in hydrogen production by decomposing lignocellulose through solar energy
  • Application of ultrathin titanium dioxide nanosheet as photocatalyst in hydrogen production by decomposing lignocellulose through solar energy
  • Application of ultrathin titanium dioxide nanosheet as photocatalyst in hydrogen production by decomposing lignocellulose through solar energy

Examples

Experimental program
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Effect test

Embodiment 1-1

[0021] Add 10ml of tetrabutyl titanate, 4ml of hydrofluoric acid, and 10ml of ethanol into a 50ml reactor, stir well, and heat at 180°C for 16h. After the reactor was cooled to room temperature, the product was centrifuged and washed five times with 0.1M NaOH solution and deionized water successively, and dried in a vacuum drying oven at 80°C for 12 hours. The collected dry powder is titanium dioxide nanosheets. Such as figure 1 As shown, the crystal form of the obtained titanium dioxide can be proved by the X-ray electron diffraction image, which has a good crystal structure. Such as figure 2 As shown in (a)-(b), the thickness of ultrathin titanium dioxide nanosheets is 2-3nm. Such as image 3 Titanium dioxide nanosheets present a typical two-dimensional morphology structure with a size of 50-100nm.

Embodiment 2-1

[0022] Example 2-1: Using the ultra-thin titanium dioxide nanosheets prepared in Example 1-1 as a photocatalyst, pour 250ml of deionized water, 100mg of photocatalyst, and 1g of α-cellulose into a glass reactor. Using a 300W xenon lamp as the light source, the hydrogen production performance of the photocatalyst solar photocatalytic decomposition of α-cellulose was tested. Such as Figure 4 shown. Continuous test 4h.

Embodiment 2-2

[0023] Example 2-2: For the ultra-thin titanium dioxide nanosheets prepared in Example 1-1 for the photocatalyst in Example 2-1, load different contents of Pt as co-catalysts, and keep the rest of the conditions constant, solar photocatalytic decomposition of α- The hydrogen production performance of cellulose is shown in Table 1.

[0024] Table 1

[0025]

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Abstract

The invention discloses an application of an ultrathin titanium dioxide nanosheet as a photocatalyst in hydrogen production by decomposing lignocellulose by solar energy. According to the ultrathin titanium dioxide nanosheet, the morphology of titanium dioxide is controlled through a hydrothermal synthesis method, and the ultrathin anatase type TiO2 nanosheet with the large high-activity exposed surface is obtained, wherein the ultrathin anatase type TiO2 nanosheet is of a typical two-dimensional morphology structure, the size ranges from 50 nm to 100 nm, and the thickness ranges from 2 nm to 3 nm. The prepared ultrathin titanium dioxide nanosheet can be effectively applied to preparation of hydrogen through solar photocatalytic decomposition of lignocellulose, and the lignocellulose and water are driven to react under illumination to prepare hydrogen. The ultrathin titanium dioxide nanosheet photocatalyst has the advantages of greenness, stability, rapidness in preparation, simple process and the like.

Description

technical field [0001] The invention belongs to the field of new energy conversion materials, and in particular relates to the application of an ultra-thin titanium dioxide nanosheet photocatalyst in solar photocatalytic decomposition of lignocellulose to prepare hydrogen. Background technique [0002] Due to the continuous consumption of fossil fuels such as oil and coal, global environmental pollution and the depletion of fossil resources are becoming more and more serious, which is not conducive to the sustainable development of human economic society. In recent years, high energy demand, fossil fuel consumption, and environmental pollution have become major challenges facing the world. With the increasingly serious problems of energy and environmental pollution, the regulations on the discharge of pollutants are becoming stricter. As the largest renewable carbon resource on earth, biomass will be the most promising option to partially replace fossil resources to achieve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/02C01G23/053B82Y40/00B82Y30/00B01J35/02B01J35/00B01J23/42B01J21/06
CPCC01B3/02C01G23/053B82Y30/00B82Y40/00B01J23/42B01J21/063B01J35/004B01J35/02C01P2004/64C01P2002/72C01P2004/04C01B2203/0277C01B2203/1041C01B2203/1094
Inventor 元勇军程荃刘庆宇
Owner HANGZHOU DIANZI UNIV
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