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Method for preparing photocatalyst preparation

A photocatalyst and preparation technology, applied in the field of photocatalytic materials, can solve the problems of low efficiency of organic pollutants, low solar light absorption rate, poor stability, etc.

Active Publication Date: 2019-02-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional photocatalysts such as TiO 2 (Energy & Environmental Science, 5(2012) 6506-6512), CdS (The Journal of Physical Chemistry C, 115(2011) 11466-11473), etc. are facing problems such as low sunlight absorption rate and poor stability, which lead to solar hydrogen production efficiency and degradation Organic pollutants such as formaldehyde are not efficient

Method used

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  • Method for preparing photocatalyst preparation
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  • Method for preparing photocatalyst preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0043] Prepare raw materials according to the proportioning in table 1:

[0044] The raw material ratio table of table 1 embodiment 1-4 and comparative example 1-3

[0045] Reagent name

Example 1

Example 2

Example 3

Example 4

Comparative example 1

Comparative example 2

Comparative example 3

La 2 Ti 2 o 7

42.86

50.00mg

52.94mg

54.55mg

52.94mg

52.94mg

52.94mg

In 2 S 3

17.14mg

10.00mg

7.06mg

5.45mg

7.06mg

7.06mg

7.06mg

La 2 Ti 2 o 7 / In 2 S 3

60.00mg

60.00mg

60.00mg

60.00mg

60.00mg

60.00mg

60.00mg

Chloroplatinic acid

1.20mg

1.20mg

1.20mg

1.20mg

0.60mg

1.20mg

1.80mg

Laccase

0.15mg

0.15mg

0.15mg

0.15mg

0.15mg

0.00mg

0.15mg

[0046] Table 2 shows the photolysis performance of Examples 1-4 and Comparative Examples 1-3 under the condition of 400nm cut-of...

Embodiment 5

[0052] A kind of preparation method of photocatalyst preparation, perovskite type metal oxide La 2 Ti 2 o 7 with sulfide In 2 S 3 P-N heterostructure La constructed by electrostatic assembly 2 Ti 2 o 7 / In 2 S 3 , and then loaded with nano-platinum and laccase to prepare a photocatalyst preparation that can realize hydrogen production and formaldehyde degradation by solar energy. Among them, the perovskite metal oxide La 2 Ti 2 o 7 with sulfide In 2 S 3 The mass ratio of the photocatalyst preparation is 2.5:1.0, the content of loaded nano-platinum is 1wt%, and the visible light absorption of the prepared photocatalyst preparation is continuously adjustable from 500 nanometers to 600 nanometers.

[0053] The above-mentioned preparation method specifically adopts the following steps:

[0054] (1) Control the temperature at 263K, mix and dissolve titanium acetate and lanthanum nitrate in deionized water to obtain a transparent solution;

[0055] (2) Control temperat...

Embodiment 6

[0065] A kind of preparation method of photocatalyst preparation, perovskite type metal oxide La 2 Ti 2 o 7 with sulfide In 2 S 3 P-N heterostructure La constructed by electrostatic assembly 2 Ti 2 o 7 / In 2 S 3 , and then load nano-platinum and laccase to prepare a photocatalyst preparation that can realize hydrogen production by solar energy and formaldehyde degradation by solar energy, wherein the perovskite metal oxide La 2 Ti 2 o 7 with sulfide In 2 S 3 The mass ratio is 7.5:1.0, the content of loaded nano-platinum is 2wt%, and the content of laccase is 0.5wt%. The visible light absorption of the prepared photocatalyst preparation is continuously adjustable from 500 nanometers to 600 nanometers.

[0066] The above-mentioned preparation method specifically adopts the following steps:

[0067] (1) Control the temperature at 273K, mix and dissolve titanium acetate and lanthanum nitrate in deionized water to obtain a transparent solution;

[0068] (2) control t...

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Abstract

The invention relates to a method for preparing a photocatalyst preparation. The P-N heterostructure La2Ti2O7 / In2S3 assembled by perovskite-type metal oxide La2Ti2O7 and sulfide In2S3 is loaded with nano-platinum and laccase, and a photocatalyst preparation capable of realizing solar hydrogen production and solar energy degradation of formaldehyde is prepared. Compared with the prior art, the perovskite-type metal oxide La2Ti2O7 and the sulfide In2S3 of the invention have an ultra-thin two-dimensional structure, and the visible light absorption thereof is continuously adjustable from 550 nm to600 nm. The photocatalyst preparation can realize hydrogen production by full decomposition of water under sunlight and efficient removal of formaldehyde in the room.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a preparation method of a photocatalyst preparation for producing hydrogen by photolysis of water and removing pollutant formaldehyde in indoor and other closed spaces. Background technique [0002] With the rapid development of human society, it is increasingly difficult for the existing energy reserves to meet the rapidly growing energy demand of mankind; in addition, the exploitation, use and discharge of fossil fuels have induced serious environmental problems, such as climate warming, ocean acidification, Air pollution and so on seriously hinder the sustainable development of society. Therefore, developing or finding a new sustainable energy utilization method is the key to solving the above problems; at the same time, with the advancement of science and technology, human living standards are gradually improving, and human health awareness and en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/13B01D53/84B01D53/72C01B3/04C12N11/14
CPCB01D53/72B01D53/84C12N9/0061C12N11/14C12Y110/03002C01B3/042B01J27/13B01D2257/708C01B2203/0277B01J35/39Y02P20/59Y02A50/20Y02E60/36Y02P20/133
Inventor 徐晓翔化二兵
Owner TONGJI UNIV
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