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Cerium-doped catalyst material as well as preparation method and application thereof

A catalyst and cerium-doped technology, which is applied in the field of preparation of cerium-doped catalyst materials, and achieves the effects of simple preparation method, efficient degradation, and simple and feasible synthesis method

Inactive Publication Date: 2014-12-10
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Zhao Shun once reported in his research that Ce-doped materials can degrade the cationic pollutant saffron T (2009, Fast catalytic degradation of organic dye with air and MoO3: Ce nanofibers under room condition), but the degradation of this article requires a lot of Oxygen is constantly being added to the system, so it is necessary to improve

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  • Cerium-doped catalyst material as well as preparation method and application thereof
  • Cerium-doped catalyst material as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0035] The catalyst of the present invention is a doped catalyst. where the main component is MoO 3 , the modified doping component is CeO 2 . Doped Catalyst Ce / MoO 3 The preparation method adopts the hydrothermal method combined with the impregnation and calcination method, that is, the hydrothermal method synthesizes MoO 3 , and prepared Ce / MoO by impregnation and calcination 3 doped material.

[0036] Dissolve 0.6180g of ammonium molybdate in 10ml of water, stir to dissolve, then add 1.59ml of dilute nitric acid with a concentration of 2.2mol / L, stir for 3 minutes, transfer the solution into a 60ml autoclave, and heat the autoclave to 180 °C, remove after 24 hours. After cooling to room temperature, wash 3 times with distilled water, centrifuge and precipitate, and heat the solid powder at 120°C for 3 h to dry to obtain MoO 3 sample.

[0037] Weigh 0.15g of the above MoO 3 Add 1.66ml of cerium nitrate solution with a concentration of 11.4mg / ml to the sample, add wa...

Embodiment 2

[0039] The catalyst of the present invention is a doped catalyst. where the main component is MoO 3 , the modified doping component is CeO 2 . Doped Catalyst Ce / MoO 3 The preparation method adopts the hydrothermal method combined with the impregnation and calcination method, that is, the hydrothermal method synthesizes MoO 3 , and prepared Ce / MoO by impregnation and calcination 3 doped material.

[0040] Dissolve 0.6180g of ammonium molybdate in 10ml of water, stir to dissolve, then add 1.59ml of dilute nitric acid with a concentration of 2.2mol / L, stir for 3 minutes, transfer the solution into a 60ml autoclave, and heat the autoclave to 180 °C, remove after 24 hours. After cooling to room temperature, wash 3 times with distilled water, centrifuge and precipitate, and heat the solid powder at 120°C for 3 h to dry to obtain MoO 3 sample.

[0041] Weigh 3 parts of 0.15g of the above sample, add 3.32ml, 6.64ml, 13.28ml of cerium nitrate solution (concentration: 11.4mg / ml)...

Embodiment 3

[0043] Novel Ce-doped MoO disclosed by the present invention 3 Catalyst, which can efficiently degrade environmental organic pollutants without light and without heating, and the degradation activity of the optimal doping amount is higher than that of pure phase MoO 3 The improvement is more than 100 times, and has a good application prospect.

[0044] The sample can degrade the subcationic dye methylene blue, the anionic methyl orange, and the application of mixed dyes at room temperature.

[0045] figure 1 , figure 2With methylene blue as the characteristic pollutant, the doped catalyst was added under the condition of normal temperature and pressure without any oxygenation equipment, and the catalytic degradation activity of different doping amounts was investigated. figure 1 The middle abscissa is the degradation time, and the ordinate is the degradation ratio of methylene blue.

[0046] Depend on figure 2 middle k The degradation activity of the optimal doping a...

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Abstract

The invention aims at providing a cerium-doped catalyst material as well as a preparation method and an application thereof. The preparation method of the material is simple and feasible; the prepared materials are excellent in properties. The cerium-doped catalyst material is applied to catalytic degradation of organic pollutants. A catalyst prepared by the cerium-doped catalyst material is capable of degrading the organic pollutants in sewage with zero energy consumption under the condition that the catalyst does not need to be further processed. The preparation method of the cerium-doped catalyst material comprises the following steps: a, synthesizing pure-phase MoO3 by using a hydrothermal synthesis method; and b, synthesizing a Ce-doped MoO3 material by using an impregnation and calcination method. The catalyst is capable of efficiently degrading the organic pollutants in the environment under the conditions that the catalyst is not illuminated by the light and does not need to be heated; compared with the pure-phase MoO3, the degradation activity of the catalyst with an optimum doping content is improved by over 100 times; the catalyst has a good application prospect.

Description

Technical field: [0001] The present invention relates to Ce / MoO 3 The technical field of catalysts, in particular, relates to the preparation of a cerium-doped catalyst material and its activity in catalytic degradation of organic pollutants. Background technique: [0002] Dye wastewater is one of the most difficult industrial wastewater, and it is also the main source of water pollution. The degradation methods of dyes mainly include biological method, physical method and chemical method (Chen Chanwei et al., 2010). However, due to current technical reasons, the biological method runs unstable and has a small application range, so this method encounters a series of difficulties in practical application. As for the physical treatment of organic wastewater, adsorption technology is mostly used to transfer pollutants from one phase to another, but the degradation of pollutants has not actually been achieved. Therefore, more and more researchers are focusing on chemical t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28C02F1/58
CPCY02W10/37
Inventor 陈敏东金宇舰滕飞
Owner NANJING UNIV OF INFORMATION SCI & TECH
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