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A kind of preparation method of photocatalyst preparation

A photocatalyst and preparation technology, applied in the field of photocatalytic materials, can solve the problems of low sunlight absorption rate, poor stability, low efficiency of organic pollutants, etc., and achieve obvious killing effect, enhanced binding ability, and enhanced ability to capture electrons. Effect

Active Publication Date: 2021-05-11
TONGJI UNIV
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  • Description
  • Claims
  • Application Information

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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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  • A kind of preparation method of photocatalyst preparation
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  • A kind of preparation method of 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-off filter and the performance of removing formaldehyde detected according to GB / T16129. ...

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 present invention relates to a kind of preparation method of photocatalyst preparation, the perovskite type metal oxide La 2 Ti 2 o 7 with sulfide In 2 S 3 Assembly-constructed P‑N heterostructure La 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. Compared with the prior art, the perovskite metal oxide La of the present invention 2 Ti 2 o 7 with sulfide In 2 S 3 With an ultra-thin two-dimensional structure, its visible light absorption is continuously adjustable from 550 nm to 600 nm. The photocatalyst preparation can achieve hydrogen production by fully splitting water under sunlight and efficiently remove formaldehyde indoors.

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 Patents(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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