Paper for photocatalytic cracking of water, a preparing method thereof and applications of the paper

A photocatalytic and nano-paper technology, applied in the field of photocatalytic materials, can solve the problems of high hydrogen energy preparation cost, difficult recovery of photocatalysts, and difficulty in wide application, achieving great application value, enhanced performance of photocatalytic splitting water for hydrogen production, Apply convenient and flexible effects

Active Publication Date: 2017-07-04
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the disadvantages in the prior art that the production cost of environmentally friendly, clean and renewable hydrogen energy is high, it is difficult to be widely used, and the photocatalyst

Method used

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  • Paper for photocatalytic cracking of water, a preparing method thereof and applications of the paper
  • Paper for photocatalytic cracking of water, a preparing method thereof and applications of the paper
  • Paper for photocatalytic cracking of water, a preparing method thereof and applications of the paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] ①Weigh one-dimensional titanium dioxide nanobelts and disperse them in deionized water, ultrasonically disperse and magnetically stir for 20±5 minutes each to obtain a titanium dioxide dispersion with a concentration of 0.5g / L; then slowly drop a hydrogen chloride solution with a concentration of 0.15mol / L Add it to the prepared titanium dioxide dispersion to adjust the pH to 2; pour the adjusted pH titanium dioxide dispersion into the Buchner funnel suction filtration device, obtain a filter cake layer with a certain thickness after suction filtration, and rinse it with water until Neutral, then take out the filter cake, dry at 50±10°C for 12-18 hours, remove the filter paper to get TiO with a thickness range of 0.1mm 2 nano paper;

[0023] ②Cut the TiO obtained in step ① of size setting 2 The nano paper is soaked in ethanol solution with a volume concentration of 2% tetrabutyl titanate, soaked for 0.5-5 hours, taken out and dried naturally to obtain hydrophilic modif...

Embodiment 2

[0031]① Weigh one-dimensional titanium dioxide nanowires and disperse them in deionized water, ultrasonically disperse and magnetically stir for 20±5 minutes each to prepare a titanium dioxide dispersion with a concentration of 0.1g / L; then slowly add a hydrogen chloride solution with a concentration of 0.3mol / L dropwise Into the obtained titanium dioxide dispersion, adjust the pH to 1.5; pour the adjusted pH titanium dioxide dispersion into a Buchner funnel suction filtration device for suction filtration to obtain a filter cake layer of a certain thickness, wash it with water until neutral, and then take out Filter cake, dry at 50±10°C for 12-18 hours, remove the filter paper to obtain TiO with a thickness range of 0.1mm 2 nano paper;

[0032] ②Cut and set the size step (①Obtained TiO 2 The nano paper is soaked in ethanol solution with a volume concentration of 1% tetrabutyl titanate, soaked for 0.5-5 hours, taken out and dried naturally to obtain hydrophilic modified TiO ...

Embodiment 3

[0036] ①Weigh one-dimensional titanium dioxide nanotubes and disperse them in deionized water, ultrasonically disperse and magnetically stir for 20±5min respectively to prepare a titanium dioxide dispersion with a concentration of 0.2g / L; then slowly add hydrogen chloride solution with a concentration of 0.4mol / L Into the obtained titanium dioxide dispersion, adjust the pH to 3; pour the adjusted pH titanium dioxide dispersion into a Buchner funnel suction filtration device for suction filtration to obtain a filter cake layer of a certain thickness, wash it with water until neutral, and then take out Filter cake, dry at 50±10°C for 12-18 hours, remove the filter paper to obtain TiO with a thickness range of 0.2mm 2 nano paper;

[0037] ②Cut the TiO obtained in step ① of size setting 2 The nano paper is soaked in ethanol solution with a volume concentration of 4% tetrabutyl titanate, soaked for 0.5-5 hours, taken out and dried naturally to obtain hydrophilic modified TiO 2 Na...

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Abstract

Paper for photocatalytic cracking of water is disclosed. The paper is formed by adopting TiO2 nanometer paper as a matrix and depositing uniform Au nanometer particles on the surface of the matrix, wherein the thickness of the TiO2 nanometer paper is 0.01-1 mm, the particle size of the Au nanometer particles is 1-100 nm, and the mass ratio of the TiO2 nanometer paper to the Au ranges from 1000:1 to 10:1. A preparing method and applications of the paper photocatalytic cracking of water are also disclosed. Experiments prove that the paper has excellent capability of performing water photocatalytic cracking to generate hydrogen. The hydrogen generating speed through water photocatalytic cracking in a unit area under visible light irradiation is 2 mmol/h or above. In addition, under sunlight, ultraviolet light in the sunlight enhances the capability of water photocatalytic cracking to generate hydrogen. The using range of the paper is wider, and the paper is prone to popularization and has extremely high application value.

Description

technical field [0001] The invention relates to photocatalytic cracking water paper and its preparation method and application, belonging to the technical field of photocatalytic materials. Background technique [0002] Heterostructure photocatalyst is one of the effective ways to enhance photocatalysis. Heterojunction photocatalysts often have better catalytic performance than either single phase constituting the heterostructure. Among them, the P-N junction constructed by semiconductor photocatalyst can effectively promote the separation of photogenerated electron-hole pairs and inhibit their recombination to enhance the photocatalytic activity. The existence of the P-N junction will cause the charge transfer between the two phases of the semiconductor catalyst, thereby forming a space charge layer (Space Charge Layers). Furthermore, the built-in electric field can be generated to change the interfacial band bending and provide a driving force to promote the separation o...

Claims

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Application Information

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IPC IPC(8): B01J23/52C01B3/04
CPCB01J23/52B01J35/004C01B3/042C01B2203/10Y02E60/36
Inventor 李海东唐建国王瑶黄林军王薇
Owner QINGDAO UNIV
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