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Mesoporous flower-shaped CeO2, as well as preparation method and application thereof

A flower-like, mesoporous technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, inorganic chemistry, etc., can solve the problem of no better solution for the targeted degradation of active bright yellow, and achieve easy recycling Reuse, high stability, and stable catalytic activity

Inactive Publication Date: 2016-07-06
ZHENGZHOU UNIVERSITY OF AERONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still no better solution for the targeted degradation of active bright yellow

Method used

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  • Mesoporous flower-shaped CeO2, as well as preparation method and application thereof
  • Mesoporous flower-shaped CeO2, as well as preparation method and application thereof
  • Mesoporous flower-shaped CeO2, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In this example, the mesoporous flower-shaped CeO 2 The preparation process is briefly described as follows. First of all, it needs to be explained that, in this application, CeO 2Prepared by hydrothermal method, this method is a kind of wet chemical synthesis method that prepares low-temperature isomers under high temperature and high pressure conditions in a sealed high-pressure container, using water as a medium, and its advantage is that it can be obtained Certain phases that are difficult to obtain by other methods. In the reaction process, under hydrothermal conditions, water is used as a solvent and a mineralizer, not only as a component that plays a chemical role and participates in the reaction, but also as a pressure transmission medium.

[0049] In the present invention, its main reaction mechanism is: urea in the solution is decomposed into cyanate ion and ammonium ion, and under acidic reaction conditions, cyanate ion is rapidly converted into CO 2 and a...

Embodiment 2

[0077] Mesoporous flower-shaped CeO provided by the present invention for testing 2 In the technical effect of removing active bright yellow in waste water, the mesoporous flower shape CeO prepared by the inventor in embodiment 1 2 Based on this, further experimental tests were done, and the related experimental process is briefly introduced as follows.

[0078] Calculation of active bright yellow standard curve and removal rate

[0079] Since the subsequent detection of Reactive Yellow in the solution is mainly based on the indirect determination of the relationship between Reactive Yellow and its absorbance, it is first necessary to draw a standard curve related to Reactive Yellow and absorbance. The specific process is: measure 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 mL of 50 mg / L active bright yellow solution in a 50 mL colorimetric tube, and then dilute to the mark with distilled water Line; use UV-visible spectrophotometer to measure the absorbance respectively, and t...

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Abstract

The invention belongs to the technical field of water treatment, and relates to mesoporous flower-shaped CeO2, a preparation method thereof and an application thereof as mimic oxidase to degrade wastewater containing reactive light yellow. The mesoporous flower-shaped CeO2 is a hollow type crystal consisting of a plurality of small particles with an average particle diameter of 214 nm. The preparation method comprises the following steps: firstly, by adopting CeCl3.7H2O as a cerium source, adopting urea as a precipitator and adopting PVP as a surfactant, preparing a CeO2 precursor under high pressure at a high temperature through a hydrothermal method; and roasting the precursor at a high temperature, thereby preparing a light yellow CeO2 nano material. According to the TMB chromogenic reaction, the prepared CeO2 has characteristics of mimic enzyme. The mesoporous flower-shaped CeO2 is used for reactive light yellow catalytic degradation reaction, so that the degradation rate of the reactive light yellow can be about 95% under the optimum proportion condition, and therefore, the mesoporous flower-shaped CeO2 has relatively good application prospects.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a mesoporous flower-like CeO 2 (Cerium dioxide), its preparation method and its patent application as a simulated oxidase in the degradation of wastewater containing active bright yellow. Background technique [0002] Water pollution is a problem that must be solved in the development process of various countries, and the treatment of dye wastewater has always been a difficult problem in industrial sewage treatment. Reactive dyes are widely used because of their complete hue, excellent color fastness, bright color, light fastness, soaping resistance, simple process and low cost. For example, reactive bright yellow, as a reactive dye, is a light yellow powder with high solubility and good reactivity. It is an important dye for dyeing and printing cotton, linen, artificial cotton fabrics, and silk. However, in the prior art, there is no better targeted solution for the se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y30/00B82Y40/00C02F1/72
CPCB82Y30/00B82Y40/00C01F17/206C01P2002/72C01P2002/82C01P2004/03C01P2004/30C01P2004/62C02F1/725
Inventor 李春光郑宾国陈雅洁权玉平周浩彭伟功刘蕾张珂
Owner ZHENGZHOU UNIVERSITY OF AERONAUTICS
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