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Preparation method of carbon nano-tube based Fenton-like catalyst for advanced oxidation system

A carbon nanotube, advanced oxidation technology, applied in physical/chemical process catalysts, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problems of increasing difficulty, high wastewater treatment cost, and fast reaction speed, reducing Secondary environmental pollution, avoidance of secondary environmental pollution, and the effect of adsorption promotion

Inactive Publication Date: 2014-01-08
TONGJI UNIV
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  • Abstract
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Problems solved by technology

However, the Fenton method has the following disadvantages: when treating high-concentration pollutants, the amount of hydrogen peroxide is large, the reaction speed is too fast, and the removal efficiency is low, resulting in high wastewater treatment costs; at the same time, the conventional Fenton reagent belongs to a homogeneous catalytic system and requires subsequent treatment. To recover the catalyst, the recovery cost is high, the process is complicated, and it is easy to cause secondary pollution
The applicable pH range of the Fenton reaction is small, and generally must be carried out at pH <3, which increases the difficulty of the application of heterogeneous catalysts in this method

Method used

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  • Preparation method of carbon nano-tube based Fenton-like catalyst for advanced oxidation system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Put the iron-containing carbon nanotubes of the original sample into a quartz boat, carry out oxidation treatment in an argon atmosphere, raise the temperature to 400°C at a rate of 10°C / min, and heat for 1 hour; then put the obtained sample into a quartz boat, Reduction treatment was carried out under the atmosphere, the temperature was raised to 850°C at a rate of 10°C / min, and heated for 1 hour to obtain a pretreated sample. like figure 1 As shown, the oxidation process is to oxidize the external carbon in the original sample "carbon-coated iron" and promote destruction, so that the internal iron in the "carbon-coated iron" will be exposed, and the elemental iron will be oxidized at the same time. The reduction process uses the oxidation of the iron in the previous step, so that the iron oxide and the carbon wrapped in the outside undergo a reduction reaction again, further consuming the carbon around the iron, and the inner iron in the "carbon-coated iron" is more ...

Embodiment 2

[0033]Put the iron-containing carbon nanotubes of the original sample into a quartz boat, carry out oxidation treatment in an argon atmosphere, raise the temperature to 400°C at a rate of 10°C / min, and heat for 1 hour; then put the obtained sample into a quartz boat, Reduction treatment was carried out under the atmosphere, the temperature was raised to 850°C at a rate of 10°C / min, and the pretreated sample was obtained by heating for 1 hour; the pretreated sample and sulfur were mixed uniformly according to the mass ratio of 2:1, and the mixture was put into a quartz boat and heated under argon gas. Carry out sulfuration treatment under the atmosphere, heat up to 600°C at a rate of 10°C / min, heat for 1 hour, and obtain a mixed sample; put the obtained mixture into a sodium sulfide solution, ultrasonicate, and after the remaining sulfur has completely reacted, filter it with suction, and the obtained The solid is dried to obtain a carbon nanotube-based Fenton-like advanced oxid...

Embodiment 3

[0035] Put the iron-containing carbon nanotubes of the original sample into a quartz boat, carry out oxidation treatment in an argon atmosphere, raise the temperature to 400°C at a rate of 10°C / min, and heat for 1 hour; then put the obtained sample into a quartz boat, Reduction treatment was carried out under the atmosphere, the temperature was raised to 850°C at a rate of 10°C / min, and the pretreated sample was obtained by heating for 1 hour; the pretreated sample and sulfur were mixed uniformly according to the mass ratio of 2:1, and the mixture was put into a quartz boat and heated under argon gas. Carry out sulfuration treatment under the atmosphere, heat up to 600°C at a rate of 10°C / min, heat for 1 hour, and obtain a mixed sample; put the obtained mixture into a sodium sulfide solution, ultrasonicate, and after the remaining sulfur has completely reacted, filter it with suction, and the obtained The solid is dried to obtain a carbon nanotube-based Fenton-like advanced oxi...

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Abstract

The invention relates to a preparation method of a carbon nano-tube based Fenton-like catalyst for an advanced oxidation system. The preparation method is characterized by comprising the following steps: (1) firstly, carrying out oxidation treatment on a primary sample of an iron-containing carbon nano-tube at an air atmosphere; (2) then, carrying out high-temperature reduction treatment on the primary sample at a protective atmosphere; (3) next, sufficiently mixing elemental sulfur and a reactant, and then, carrying out sulphur treatment on the mixture at a certain temperature; (4) finally, after the reaction is ended, dispersing the product into a sodium sulfide solution, repeatedly washing the mixture, filtering and drying in vacuum to obtain a carbon nano-tube / ferrous sulfide based Fenton-like catalyst. The preparation process can be continuously carried out, the method is relatively simple, and the problem of secondary environment pollution possibly existing in the preparation process is reduced. Due to the implementation of the work, the Fenton-like catalyst with the carbon nano-tube as a carrier can be favorably and widely applied on a large scale.

Description

technical field [0001] The invention belongs to the technical field of environmental nano-new functional materials, and specifically relates to a preparation method of a carbon nanotube-based Fenton-like advanced oxidation system catalyst. The catalyst is used for rapid advanced oxidation removal of antibiotics in aqueous solution, and simultaneously realizes adsorption and oxidation The removal effect is carried out at the same time, which effectively improves the removal efficiency of advanced oxidation. Background technique [0002] With the rapid development of the pharmaceutical industry, the pollution of pharmaceutical wastewater to the environment is increasing day by day, and it also poses a serious threat to human health. The pharmaceutical industry is characterized by a wide variety of products, complex production processes, and large differences in production scale. At present, my country's pharmaceutical industry accounts for 1.7% of the total industrial output ...

Claims

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Application Information

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IPC IPC(8): B01J27/043B01J20/20C02F1/72
Inventor 马杰陈君红杨明轩孟涛
Owner TONGJI UNIV
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