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a kind of ag 3 po 4 /α-fe 2 o 3 Preparation methods and applications of composite materials

A technology of composite materials and reactors, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as poor stability, high cost, and large-scale application limitations, and achieve high photoluminescence The effect of catalytic activity

Active Publication Date: 2022-06-21
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since Ag 3 PO 4 In practical applications, the high cost and poor stability in the photocatalytic process limit its large-scale application

Method used

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  • a kind of ag <sub>3</sub> po <sub>4</sub> /α-fe <sub>2</sub> o <sub>3</sub> Preparation methods and applications of composite materials
  • a kind of ag <sub>3</sub> po <sub>4</sub> /α-fe <sub>2</sub> o <sub>3</sub> Preparation methods and applications of composite materials
  • a kind of ag <sub>3</sub> po <sub>4</sub> /α-fe <sub>2</sub> o <sub>3</sub> Preparation methods and applications of composite materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] ①、Ag 3 PO 4 Preparation of powder:

[0035] Take 0.25g of AgNO 3 Dissolve in 60 mL of ionized water, add 0.5 g of polyvinylpyrrolidone, and sonicate for 5 min to obtain solution A. Take 0.19g of Na 2 HPO 4 Dissolved in 60 mL of ionized water and sonicated for 5 min to obtain solution B. Under stirring at 75°C in the dark, solution B was added dropwise to solution A, and after the dropwise addition was completed, the reaction was continued in the dark for 30 min. The obtained product was centrifuged, washed twice with deionized water and ethanol, and dried under vacuum at 60 °C to obtain Ag 3 PO 4 powder.

[0036] ②, flaky α-Fe 2 O 3 Preparation of:

[0037] Take 1.42g of FeCl 3 ·6H 2 O, add 60 mL of deionized water, add 2 g of NaOH after dissolving, and stir to obtain the precursor, which is placed in the reaction kettle for hydrothermal reaction at 180 ° C for 24 hours, and after the reaction kettle is cooled to room temperature, the product is washed with...

Embodiment 2

[0050] Ag 3 PO 4 / α-Fe 2 O 3 Photocatalytic Properties of Composites

[0051] 1. Photocatalysis experiment

[0052] Weigh 50mg of Ag 3 PO 4 / α-Fe 2 O 3 The sample was ultrasonically dispersed in 100 mL of Rhodamine B solution with a concentration of 5 mg / L. Then, the above mixture was placed in a dark room to magnetically stir for 30 minutes, so that the catalyst and the dye reached the equilibrium of adsorption and desorption. The photocatalytic performance was tested by using a xenon lamp as a light source to simulate sunlight. After centrifuging 4 mL of the solution every 5 minutes, UV-Vis spectroscopy was used. The absorbance was measured by a photometer.

[0053] 2. Photocatalytic performance analysis

[0054] by Ag under visible light 3 PO 4 , α-Fe 2 O 3 and Ag 3 PO 4 / α-Fe 2 O 3 The catalytic degradation efficiency of the composite photocatalyst for Rhodamine B, and the photocatalytic activity of the catalyst was investigated. Depend on Image 6 (a) ...

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Abstract

a kind of Ag 3 PO 4 / α-Fe 2 o 3 The preparation method and application of composite materials relate to the technical field of photocatalytic material preparation. AgNO 3 and Na 2 HPO 4 Preparation of Ag 3 PO 4 nanoparticles, and then utilize FeCl 3 ·6H 2 Preparation of flaky α-Fe by hydrothermal reaction of O 2 o 3 , and finally Ag by hydrothermal reaction 3 PO 4 Nanoparticles uniformly dispersed in flake α‑Fe 2 o 3 Microcrystalline surface. Under the condition of 160℃, 10h hydrothermal reaction, Ag can be 3 PO 4 Particles and α‑Fe 2 o 3 The sheets are closely combined to form a heterojunction structure, which improves the migration of photogenerated electrons and holes between the two, thereby improving the photocatalytic activity of the catalyst. When Ag 3 PO 4 with α‑Fe 2 o 3 When the molar ratio is 1:2, the catalytic degradation ability to rhodamine B solution is the best, and the catalytic degradation efficiency can reach 95% in 10 minutes.

Description

technical field [0001] The invention relates to the technical field of photocatalytic material preparation, in particular to a kind of Ag 3 PO 4 / α-Fe 2 O 3 Preparation method and application of composite material. Background technique [0002] Photocatalytic wastewater treatment has become one of the most promising water treatment technologies due to its greenness, high efficiency, stability and environmental friendliness. Nano TiO 2 Photocatalysts are the most widely used of various catalysts. However, its application in photocatalysis is limited due to its wide band gap, low quantum efficiency, and low utilization of visible light. [0003] Ag 3 PO 4 As a kind of photocatalytic material, its forbidden band width is 2.36eV, it can absorb visible light and ultraviolet light with wavelength less than 525nm, and its high quantum efficiency makes it a very promising visible light catalyst. However, since Ag 3 PO 4 In practical applications, the high cost and poor st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/18B01J23/745B01J37/10C02F1/30C02F101/34C02F101/36C02F101/38
CPCB01J27/1817B01J23/745B01J37/10C02F1/30C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2305/10B01J35/39B01J35/23
Inventor 高雅韩成良张凌云董灿灿吴倩孙亚楠
Owner HEFEI UNIV
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