CeO2/MnO2 composite photocatalyst as well as preparation method and application thereof

A catalyst and composite light technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., to improve photocatalytic performance, prolong life, and improve the utilization rate of visible light. Effect

Active Publication Date: 2021-12-10
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far no CeO 2 Modified MnO 2 Preparation of Nanorod Composite Photocatalyst and Its Research Report on Photocatalytic Oxidation of Toluene

Method used

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  • CeO2/MnO2 composite photocatalyst as well as preparation method and application thereof
  • CeO2/MnO2 composite photocatalyst as well as preparation method and application thereof
  • CeO2/MnO2 composite photocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1)MnO 2 Preparation of nanorods

[0033] 2.48g manganese sulfate hydrate (MnSO 4 ·H 2 O), 1.66g potassium permanganate (KMnO 4 ) was placed in a 150mL stainless steel autoclave with a polytetrafluoroethylene liner, 75mL of ultrapure water was added, and the constant temperature heat reaction was maintained at 160°C for 4h; after the reaction was completed, it was naturally cooled to room temperature, and centrifuged and washed 3 times with ultrapure water, and the obtained The sample was dried at a constant temperature of 110°C for 12 hours; the dried sample was placed in a muffle furnace and calcined at 300°C for 6 hours. After the calcination was completed and the product was lowered to room temperature, the product was taken out and ground to obtain MnO 2 Nanorods, save for future use.

[0034] (2) Preparation of CeO with a loading capacity of 5% 2 / MnO 2 composite material

[0035] At room temperature, 0.5 g of MnO 2 Slowly add the rod into the mixed solution...

Embodiment 2

[0037] (1)MnO 2 Preparation of nanorods

[0038] 2.48g manganese sulfate hydrate (MnSO 4 ·H 2 O), 1.66g potassium permanganate (KMnO 4 ) was placed in a 150mL stainless steel autoclave with a polytetrafluoroethylene liner, 75mL of ultrapure water was added, and the constant temperature heat reaction was maintained at 160°C for 4h; after the reaction was completed, it was naturally cooled to room temperature, and centrifuged and washed 3 times with ultrapure water, and the obtained The sample was dried at a constant temperature of 110°C for 12 hours; the dried sample was placed in a muffle furnace and calcined at 300°C for 6 hours. After the calcination was completed and the product was lowered to room temperature, the product was taken out and ground to obtain MnO 2 Nanorods, save for future use.

[0039] (2) Preparation of CeO with a loading capacity of 10% 2 / MnO 2 composite material

[0040] At room temperature, 0.5 g of MnO 2 Slowly add the rod into the mixed solut...

Embodiment 3

[0042] (1)MnO 2 Preparation of nanorods

[0043] 2.48g manganese sulfate hydrate (MnsO 4 ·H 2 O), 1.66g potassium permanganate (KMnO 4 ) was placed in a 150mL stainless steel autoclave with a polytetrafluoroethylene liner, 75mL of ultrapure water was added, and the constant temperature heat reaction was maintained at 160°C for 4h; after the reaction was completed, it was naturally cooled to room temperature, and centrifuged and washed 3 times with ultrapure water, and the obtained The sample was dried at a constant temperature of 110°C for 12 hours; the dried sample was placed in a muffle furnace and calcined at 300°C for 6 hours. After the calcination was completed and the product was lowered to room temperature, the product was taken out and ground to obtain MnO 2 Nanorods, save for future use.

[0044] (2) Preparation of CeO with a loading capacity of 30% 2 / MnO 2 composite material

[0045] At room temperature, 0.5 g of MnO 2 Slowly add the rod into the mixed solut...

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Abstract

The invention discloses a CeO2/MnO2 composite photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of functional materials. A MnO2 rod photocatalyst and Ce (NO3) 3.6 H2O are synthesized into CeO2/MnO2 composite photocatalysts with different loading capacities through a green and simple solvothermal method, a MnO2 rod-shaped carrier is modified through CeO2 nanoparticles, the service life of a photon-generated carrier is prolonged, the oxidation-reduction capacity of a material is improved, the acid-base property of the surface of the catalyst is optimized, and the CeO2/MnO2 composite photocatalysts are used for catalytic oxidation of toluene under a full spectrum, adsorption, activation and photocatalytic oxidation of more toluene molecules can be promoted, and finally, environment-friendly carbon dioxide is discharged. The used raw materials are cheap, the method is simple and convenient in process, and the prepared CeO2/MnO2 composite photocatalyst is high in practicability and has good economic benefits and environmental protection benefits.

Description

technical field [0001] The invention belongs to the technical field of functional materials, in particular to a CeO 2 Nanoparticle-modified MnO 2 Rod catalyst, preparation method thereof and application of the catalyst in photocatalytic oxidation of toluene. Background technique [0002] Volatile organic compounds (VOCs) are air pollutants that are harmful to humans and the surrounding ecosystem. They are irritating and toxic to the human body, and can also cause photochemical smog, global warming, and ozone layer destruction. Photocatalytic oxidation technology can effectively degrade trace VOCs pollutants under mild conditions, which is green and environmentally friendly without secondary pollution, and has the advantage of efficiently removing VOCs pollutants in a short period of time. In recent years, semiconductor manganese oxide (MnO 2 ) as a commonly used catalyst active component can form a certain pore structure and has a good application prospect in eliminating ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01D53/86B01D53/72
CPCB01J23/34B01J23/002B01J35/004B01J35/0013B01D53/8668B01D2257/7027B01D2257/708B01D2258/06Y02A50/20
Inventor 董林于平平邹伟欣魏晓倩濮钰李婉芹季稼伟
Owner NANJING UNIV
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