Phosphorylation modification-based photocatalytic material and preparation and application methods thereof

A phosphorylation and photocatalyst technology, applied in chemical instruments and methods, ammonia preparation/separation, physical/chemical process catalysts, etc., can solve problems such as increasing reaction costs, and achieve the effect of simple preparation and broad application prospects.

Inactive Publication Date: 2019-03-05
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
View PDF13 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current shortcomings are mainly reflected in: 1. It is necessary to adjust the energy band position of photocatalytic materials, improve the utilization rate of light and the migration efficiency of photogenerated carriers, so that the surface electrons / holes that migrate to the surface have stronger redox properties. 2. It is necessary to construct the N on the surface of the photocatalytic material 2 Activate the site and improve its stability; 3.N 2 The formation of reduced products requires the coordination of H + For the transfer of ions or protons, the general photocatalytic system chooses to use a hole sacrificial agent to provide it. However, from an application point of view, adding a sacrificial agent or solvent increases the reaction cost and brings new problems such as "three wastes" emission and treatment.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Phosphorylation modification-based photocatalytic material and preparation and application methods thereof
  • Phosphorylation modification-based photocatalytic material and preparation and application methods thereof
  • Phosphorylation modification-based photocatalytic material and preparation and application methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Phosphorylated LaFeO with Photocatalytic Nitrogen Fixation Function 3 The preparation method is as follows:

[0064] (1) Take 1.5mmol of ferric nitrate, 1.5mmol of lanthanum nitrate and 3mmol of citric acid and dissolve them in 35ml of deionized water, and stir evenly with a magnetic stirrer at room temperature until it dissolves completely;

[0065] (2) configure 2M NaOH solution, and use it to adjust the pH value of the above solution to about 9;

[0066] (3) Place the precipitated powder in a muffle furnace, keep it warm at 650°C for 3 hours, and finally cool down to obtain a powder sample;

[0067] (4) Immerse the powder sample in 0.2M phosphoric acid and stir for 1 hour;

[0068] (5) After the powder is filtered out, it is kept at 300°C for 2 hours, and a second heat treatment is performed to obtain phosphorylated LaFeO 3 .

[0069] Phosphorylated LaFeO prepared in embodiment 1 3 To characterize. Characterized by XRD, the resulting phosphorylated LaFeO 3 The...

Embodiment 2

[0071] Phosphorylated LaFeO obtained in Example 1 3 Performing Ammonia Characterization

[0072] The experimental steps include: 1. Disperse 0.1 g of the photocatalyst prepared in Example 1 in the reactor. 2. Feed N into the reactor 2 / H 2 O mixed gas, the gas flow rate is 150mL / min, N 2 / H 2 The molar ratio of O is 100:1, and the total amount of gas introduced is 9L. 3. Use a 500W xenon lamp to irradiate the photocatalyst in the reactor to cause a photocatalytic reaction. 4. Use 0.2mmol acidic solution as NH 3 The absorption solution, according to Nessler's reagent spectrophotometry for NH 3 Concentration detection. Figure 5 Shown is phosphorylated LaFeO 3 Ammonia production-time diagram. from Figure 5 It can be seen that the ammonia yield exhibited a linear increase with a yield of 100 μmol / g h.

Embodiment 3

[0078] Phosphorylated LaFeO with Photocatalytic Nitrogen Fixation Function 3 The preparation method is as follows:

[0079] (1) Weigh 1.5 mmol of iron acetylacetonate, 1.5 mmol of lanthanum acetate and 3 mmol of citric acid and dissolve them in 40 ml of deionized water, and stir evenly with a magnetic stirrer at room temperature until they are completely dissolved;

[0080] (2) Configure 2M KOH solution, and use it to adjust the pH value of the above solution to about 8;

[0081] (3) Place the precipitated powder in a muffle furnace, keep it warm at 650°C for 3 hours, and finally cool down to obtain a powder sample;

[0082] (4) Dip the powder sample in 0.2M phosphoric acid and stir for 3 hours;

[0083] (5) After the powder is filtered out, it is kept at 500°C for 2 hours, and a second heat treatment is performed to obtain phosphorylated LaFeO 3 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a phosphorylation modification-based photocatalytic material and preparation and application methods thereof. The phosphorylation modification-based photocatalytic material isphosphorylated LaFeO3, in which La3+ serves as of forming sites of phosphate radicals. The phosphorylation modification-based photocatalytic material can be applied to nitrogen fixed ammonia synthesis.

Description

technical field [0001] The invention belongs to the field of artificial nitrogen fixation and synthesis of ammonia, relates to a photocatalyst based on phosphoric acid modification and its application, and is suitable for the fields of environment, energy, materials and the like. Background technique [0002] Biological nitrogen fixation is an important chemical process second only to photosynthesis in nature, but the total nitrogen fixation in nature cannot meet the needs of industry and agriculture, so artificial nitrogen fixation provides an important support for human survival and development. Catalytically synthesized ammonia is not only the backbone of agricultural production, but as a non-carbon and hydrogen-rich compound, ammonia is regarded as a clean fuel in the future. Compared with hydrogen, liquid ammonia has a higher energy density, but it is also safer, easier to store and easier to transport. [0003] Nitrogen molecules are very stable, and the nitrogen-nitr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185C01C1/04
CPCB01J27/1853B01J35/004C01C1/0411Y02P20/52
Inventor 王文中孙祥张玲周璟
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap