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Preparation method and application of defective carbon nanotubes

A technology of carbon nanotubes and defect states, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve problems such as weak catalytic ability and inability to fully utilize active sites of carbon nanotubes , to achieve the effect of excellent performance and excellent oxidation degradation effect

Active Publication Date: 2019-01-11
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problems that the active sites of existing carbon nanotubes cannot be fully utilized and their own catalytic ability is relatively weak, and provides a method for preparing carbon nanotubes with defects and its application

Method used

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  • Preparation method and application of defective carbon nanotubes
  • Preparation method and application of defective carbon nanotubes
  • Preparation method and application of defective carbon nanotubes

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specific Embodiment approach 1

[0019] Specific embodiment 1: This embodiment is a method for preparing carbon nanotubes with defects, specifically according to the following steps:

[0020] 1. Preparation of oxidized carbon nanotubes: Mix concentrated sulfuric acid and concentrated nitric acid evenly to obtain a mixed acid; add carbon nanotubes to the mixed acid, place in a constant temperature water bath, and react for 3 hours at 75°C to 80°C 9h, then repeatedly washed with deionized water and absolute ethanol until the washing solution is neutral, and finally dried at a temperature of 60°C to 65°C to obtain carbon dioxide nanotubes; the concentrated sulfuric acid and concentrated nitric acid The volume ratio is 3:1; the mass ratio of the volume of the mixed acid to the carbon nanotube is 1L: (15g~17g);

[0021] 2. Heat treatment: put the carbon dioxide nanotubes prepared in step 1 in a tube furnace, pass inert gas at a flow rate of 150mL / min to 160mL / min for 20 minutes to exhaust the air, and then heat it...

specific Embodiment approach 2

[0022] Embodiment 2: This embodiment differs from Embodiment 1 in that: the mass percentage of the concentrated sulfuric acid described in step 1 is 95% to 98%. Others are the same as the first embodiment.

specific Embodiment approach 3

[0023] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that the mass percentage of the concentrated nitric acid described in step 1 is 65%-68%. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method and an application of carbon nanotubes, and concretely relates to a preparation method and an application of effective carbon nanotubes. The purpose of the invention is to solve the technical problems of insufficient utilization of active sites and poor self catalysis capability of existing carbon nanotubes. The preparation method comprises the following steps: 1, preparation of carbon oxide nanotubes; and 2, heat treatment. The effective carbon nanotubes can be used to catalyze degradation of organic pollutants in water by potassium hydrogenperoxomonosulphate. The defective carbon nanotubes are prepared in the invention, can be used as a catalyst for activation degradation of organic pollutants in a water phase by the potassium hydrogenperoxomonosulphate (PMS), is slightly interfered by background organic and inorganic matters, and can achieve effective oxidation to mineralize target pollutants. Compared with a traditional oxidation systembased on free radicals, a charge transfer mediated oxidation system has an excellent performance and an excellent selective degradability in restoration of organic pollutants in actual water.

Description

technical field [0001] The invention relates to a preparation method and application of carbon nanotubes. Background technique [0002] In recent decades, organic pollutants in aquatic environments have become a widespread and serious problem worldwide. In order to develop advanced technologies for the remediation of organic pollutants, many researchers have made great efforts. Among these technologies, persulfate-based advanced oxidation processes have been proposed as an effective method for decomposing organic compounds. Various strategies have been developed to activate persulfates to generate reactive oxygen species (ROS), such as UV radiation, heating, and electrochemical methods. However, these activation techniques require high energy input, which is not cost-effective. Metal-based materials (such as Co 3 o 4 , MnO 2 , CuOFe 3 o 4 ) is an effective catalyst for persulfate activation. However, metal-based catalysts inevitably leached toxic metals, which would...

Claims

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Application Information

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IPC IPC(8): B01J21/18C02F1/72C02F101/30
CPCB01J21/185C02F1/725C02F2101/30
Inventor 邵鹏辉余水平罗旭彪裴俊俊
Owner NANCHANG HANGKONG UNIVERSITY
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