Ozonated water treatment method with nano ceria as catalyst

A nano-ceria, ozonated water technology, applied in the direction of oxidized water/sewage treatment, etc., can solve the problems of backward development and utilization technology, and achieve the effects of accelerated degradation rate, improved mineralization, and easy availability of raw materials

Inactive Publication Date: 2012-06-13
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Rare earth elements have a unique f electron configuration, so they have unique optical, electrical and magnetic properties. They are known as the treasure house of new materials. my country has abundant rare earth element reserves, but its development and utilization technology is relatively backward
At present, rare earth compounds are used as catalysts, and domestic and foreign reports are very rare

Method used

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  • Ozonated water treatment method with nano ceria as catalyst
  • Ozonated water treatment method with nano ceria as catalyst
  • Ozonated water treatment method with nano ceria as catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 6.01g Ce(NO 3 ) 3 ·6H 2 Dissolve O in 40ml of deionized water (clear and transparent solution), weigh 9.62g of NaOH, and dissolve it in 80ml of deionized water to obtain a 3mol / L NaOH solution. Quickly add the NaOH solution to the cerium salt solution while stirring continuously. After 1h After the precipitate was filtered, it was fully washed with deionized water until the pH was close to neutral, and dried in an oven at 100°C for 24 hours. The dried sample was ground, placed in a muffle furnace and calcined at 400°C for 3h to obtain Sample 1. Its TEM picture is shown in figure 1 , indicating that it is a nanoparticle smaller than 10nm; XRD pattern see figure 2 , all the diffraction peaks can be compared with the cubic CeO 2 The peak position of the spectrum (JCPDS Card No.43-1002) matches, indicating that it is CeO 2 ;BET specific surface area is 113m 2 / g.

Embodiment 2

[0023] Weigh 6.01g Ce(NO 3 ) 3 ·6H 2 Dissolve O in 40ml of deionized water (clear and transparent solution), weigh 9.62g of NaOH, and dissolve it in 80ml of deionized water to obtain a 3mol / L NaOH solution. Quickly add the NaOH solution to the cerium salt solution while stirring continuously. After 1h After the precipitate was filtered, it was fully washed with deionized water until the pH was close to neutral, and dried in an oven at 100 ° C for 24 hours, the dried sample was ground, and it was calcined at 300 ° C in a muffle furnace for 3 h to obtain Sample 2.

Embodiment 3

[0025] Weigh 8.60g Ce(NO 3 ) 3 ·6H 2 Dissolve O in 40ml of deionized water (clear and transparent solution), weigh 9.62g of NaOH, and dissolve it in 80ml of deionized water to obtain a 3mol / L NaOH solution. Quickly add the NaOH solution to the cerium salt solution while stirring continuously. After 1h After the precipitate was filtered, it was fully washed with deionized water until the pH was close to neutral, and dried in an oven at 100°C for 24 hours. The dried sample was ground, placed in a muffle furnace and calcined at 400°C for 3h to obtain Sample 3.

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Abstract

The invention provides a preparation method and a use method of a nano catalyst. The preparation method comprises the following steps of: chemically precipitating tervalent cerium ion (Ce<3+>) in the alkaline environment; and calcining at the air atmosphere to obtain a nano ceria sample. Obtained nano ceria shows good catalytic property in phenol degradation with ozonated water, on such a basis, a water treatment method based on nano ceria catalysis ozonization is built. The preparation method of the nano catalyst is simple; the obtained nano catalyst is uniform in structure, large in specific surface area and obvious in effect; a new application field of a rare earth material in ozonization is developed; and the obtained nano catalyst has a wide application prospect in the aspects of water treatment and environment catalysis.

Description

technical field [0001] The invention belongs to the field of water treatment and environmental catalysis, and relates to an ozonated water treatment method using nanometer cerium dioxide as a catalyst. Background technique [0002] In recent years, the research on nanomaterials in the field of catalysis has attracted special attention all over the world, and a variety of nanomaterials have been developed as new catalysts, showing excellent catalytic performance. As an emerging research field at the intersection of nanometer and catalysis, it is self-evident that it plays an important role in promoting the rational design of nanocatalysts and developing catalytic theory. The research value has attracted attention and contains huge original innovation opportunities. [0003] As a major global issue, environmental problems have attracted increasing attention. Nanocatalysts have broad application prospects in environmental protection, and one of the important areas is the cataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78
Inventor 董玉明蒋平平王光丽刘明曾茜宗洁
Owner JIANGNAN UNIV
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