Nanofiber spherical silicon-based heterogeneous Fenton catalyst as well as synthetic method and application thereof

A technology of nanofibers and synthesis methods, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of low activity of heterogeneous Fenton catalysts, low utilization rate of hydrogen peroxide, and inability to free molecules Contact and other issues, to achieve the effect of easy recycling, easy access, high utilization rate

CN107754825AActive Publication Date: 2018-03-06GUANGZHOU UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-03-06

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Abstract

The invention discloses a nanofiber spherical silicon-based heterogeneous Fenton catalyst as well as a synthetic method and application thereof. The synthetic method is characterized by comprising thefollowing steps: adding TEOS (Tetraethyl Orthosilicate) into a mixed solution composed of n-amyl alcohol and cyclohexane to form a solution A; dissolving urea and CPBH into deionized water to form asolution B; mixing the solution A and the solution B, dropwise dripping a Cu(NO3)2 / 3H2O solution, stirring in a water bath to form a solution C, and carrying out a hydrothermal reaction in a drying oven at the temperature of 120-140 DEG C for 5-7 hours; filtering the obtained solid product, alternatively washing with deionized water and acetone, and drying; and calcining in a muffle furnace, and cooling, thereby obtaining the heterogeneous Fenton catalyst in the invention. According to the nanofiber spherical silicon-based heterogeneous Fenton catalyst disclosed by the invention, a harsh condition that the pH value of the system is regulated to 2-3 is not needed in the reaction process, and the catalyst has an excellent removal effect on degradation of non-biodegradable organic pollutantsunder neutral room temperature conditions.
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Description

technical field

[0001] The invention belongs to the field of water treatment, and in particular relates to a nanofibrous spherical silicon-based heterogeneous Fenton catalyst and its synthesis method and application. Background technique

[0002] In recent years, a large number of refractory organic pollutants (such as pesticides, medicines and endocrine disruptors, etc.) have been continuously released into water bodies, which has seriously threatened the ecological environment and human life and health. However, traditional physical, chemical and biological water treatment technologies are often unable to effectively remove these persistent persistent pollutants.

[0003] The Fenton reaction is a typical advanced oxidation process, and it has become a potential technology of choice for the removal of such pollutants due to the generation of a large number of strong oxidizing hydroxyl radicals (·OH) in the reaction. However, the classic homogeneous Fenton reaction cannot b...

Examples

Embodiment

[0041] Nanofibrous spherical silicon-based heterogeneous Fenton catalyst F-Cu-SiO of the present invention 2 The synthetic method of NSs, comprises the following steps:

[0042] (1) Dissolve 5.0 mL of TEOS into a mixed solution consisting of 3.0 mL of n-pentanol and 50.0 mL of cyclohexane to form solution A.

[0043] (2) Dissolve 1.0 g of urea and 2.0 g of CPBH into 50.0 mL of deionized water to form solution B.

[0044](3) After A and B were mixed and stirred for 60 minutes, according to the molar ratio Si / Cu=50, Cu(NO 3 ) 2 ·3H 2 O solution, the resulting solution was continuously stirred at 45 °C for 60 min. The stirring speed described in this step is 450 rpm.

[0045] (4) The solution obtained in the above steps was placed in a high-pressure reactor, and the whole was placed in an oven at 120° C. for 5 hours.

[0046] (5) Take out the autoclave, and after natural cooling, filter the obtained solid product, alternately wash five times with deionized water and aceton...