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A kind of photocatalytic cracking water paper and its preparation method and application

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

Active Publication Date: 2019-03-15
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 is not easy to recycle and cause potential secondary pollution. The problem to be solved by the present invention is to provide a photocatalytic cracking water paper and Its preparation method and application

Method used

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  • A kind of photocatalytic cracking water paper and its preparation method and application
  • A kind of photocatalytic cracking water paper and its preparation method and application
  • A kind of photocatalytic cracking water paper and its preparation method and application

Examples

Experimental program
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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

The invention discloses a photocatalytic cracking water paper based on TiO 2 Nanopaper is a matrix, and the surface is composed of Au nanoparticles deposited with uniform particles; wherein, the TiO 2 The thickness of the nanopaper ranges from 0.01 to 1mm, the particle size of the Au nanoparticles ranges from 1nm to 100nm, and the TiO in the paper 2 The mass ratio of nanopaper to Au is 1000:1~10:1. The invention also discloses the preparation method and application of the photocatalytic cracking water paper. Experiments have confirmed that the photocatalytic cracking water paper of the invention has excellent photocatalytic cracking water hydrogen production performance, and can photocatalytically crack water per unit area to produce hydrogen under visible light irradiation. The rate is above 2mmol / h. At the same time, under sunlight, its ultraviolet light has an enhanced effect on the hydrogen production performance of photocatalytic water splitting, making the application range wider, easy to promote, and has great 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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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/52C01B3/04
CPCC01B3/042B01J23/52C01B2203/10B01J35/39Y02E60/36
Inventor 李海东唐建国王瑶黄林军王薇
Owner QINGDAO UNIV
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