Titanium dioxide-carbon nanotube composite carrier catalyst and preparation method and use thereof

A technology of carbon nanotube composite and titanium dioxide, which is applied in the field of water treatment technology and environmental engineering, can solve the problem of high energy consumption in persulfate activation, and achieve the effects of low production cost, good stability, and good pH universality

Active Publication Date: 2018-12-14
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is still little research and application of persulfate advanced oxidation technology in China, and there is still a problem of high energy consumption in the activation mode of persulfate in the actual application process

Method used

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  • Titanium dioxide-carbon nanotube composite carrier catalyst and preparation method and use thereof
  • Titanium dioxide-carbon nanotube composite carrier catalyst and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] ①Take carbon nanotubes, completely immerse them in 60% concentrated nitric acid, and nitrify them for 30 hours. Deionized water 5

[0033] After washing for the first time, the carbon nanotubes floating on the surface of deionized water were removed, and the lower layer of precipitated carbon nanotubes was removed by suction filtration and dried.

[0034] ② Dissolve b mol tetrabutyl titanate in c mol absolute ethanol to form solution A, and stir with a magnetic stirrer at a speed of 100 rpm. Will Co(NO 3 ) 2 ·6H 2 O was dissolved in d mol deionized water to form solution B, and the pH was adjusted to 3 with glacial acetic acid. (where: b / c=25, c / d=5)

[0035] ③ Slowly add solution B to solution A to form AB mixed solution, stop stirring, put a g nitric acid treated carbon nanotubes into AB mixed solution, and ultrasonically disperse at 80 kHz until it becomes a gel. After the gel is almost completely dried, it is put into a tube furnace and roasted at 500°C for 27...

Embodiment 2

[0038] ① Take the carbon nanotubes, completely immerse them in 50% concentrated sulfuric acid, and acidify them for 24 hours. After repeated washing with deionized water, suction filtration and drying were performed.

[0039] ② Dissolve b mol tetrabutyl titanate in c mol absolute ethanol to form solution A, and stir with a magnetic stirrer at a speed of 100 rpm. Bi(NO 3 ) 3 ·5H 2 O was dissolved in d mol deionized water to form solution B, and the pH was adjusted to 3 with glacial acetic acid. (where: b / c=30, c / d=8)

[0040] ③Slowly add solution B to solution A dropwise to form AB mixed solution, stop stirring, put a g sulfuric acid-treated carbon nanotubes into AB mixed solution, and ultrasonically disperse at 60 kHz until it becomes a gel. After the gel is almost completely dried, put it in a tube furnace and sinter it at 600°C for 270 minutes without air to obtain a composite carrier catalyst. The active component Bi is calculated as metal. 2 o 3 The loading was 4.0 ...

Embodiment 3

[0043] ①Take carbon nanotubes, completely immerse them in 65% concentrated nitric acid, and acidify them for 24 hours. After repeated washing with deionized water, suction filtration and drying were performed.

[0044] ② Dissolve b mol tetrabutyl titanate in c mol absolute ethanol to form solution A, and stir with a magnetic stirrer at a speed of 200 rpm. Will Co(NO 3 ) 2 ·6H 2 O and Ni(NO 3 ) 2 ·6H 2 O was dissolved in d mol deionized water to form solution B, and the pH was adjusted to 3 with glacial acetic acid. (where: b / c=25, c / d=5)

[0045] ③ Slowly add solution B to solution A to form AB mixed solution, stop stirring, put a g nitric acid treated carbon nanotubes into AB mixed solution, and ultrasonically disperse at 80 kHz until it becomes a gel. After the gel was almost completely dried, it was placed in a tube furnace and roasted at 500°C for 300 min to obtain a composite supported catalyst. The active component NiO loading was 2.0wt.% in terms of metal, Co 3...

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Abstract

The invention relates to a method for preparing a titanium dioxide-carbon nanotube composite carrier catalyst by a sol-gel method. Tetrabutyl titanate is used as a titanium dioxide carrier titanium source, carbon nanotubes treated by sulfuric acid or nitric acid are used as other components of the composite carrier and one or two of CeO2, Co3O4, Bi2O3 and NiO are used as active substances. The highly efficient persulfate catalyst is prepared from hydrolyzed gel of tetrabutyl titanate. The method has the characteristics of simple preparation process, good stability, good dispersion of active components, high low-temperature catalytic activity and good pH universality.

Description

technical field [0001] The invention relates to a method for preparing a persulfate catalyst with a composite material carrier and its application. The method has the characteristics of high catalytic activity, good stability and low requirements on catalytic conditions, and is suitable for industrial degradation of organic waste water. It belongs to the field of water treatment technology and environmental engineering. technical background [0002] Water is an important natural resource for human survival. In recent years, with the rapid development of industry, the waste and pollution of water resources in production and life have greatly increased. Among them, organic wastewater is one of the most harmful types of industrial wastewater. Because industrial organic wastewater contains phenolic pollutants, pesticides, dyes, polychlorinated biphenyls, etc., most industrial organic wastewater has the characteristics of high biological toxicity, difficult biodegradation, carcin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J23/18B01J23/75B01J23/755B01J23/83B01J23/843C02F1/72C02F101/30C02F101/36
CPCB01J23/002B01J23/10B01J23/18B01J23/75B01J23/755B01J23/83B01J23/8437B01J2523/00C02F1/725C02F2101/30C02F2101/36B01J2523/845B01J2523/47B01J2523/3712B01J2523/54
Inventor 黄菲刘嘉威周哲平于杨杨雅琼黄和乔纳森贝尔
Owner NANJING UNIV OF TECH
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