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A modified tio 2 /cnts composite catalyst and preparation method thereof

A composite catalyst and modification technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. In order to improve the enrichment ability, improve the photocatalytic reduction ability, and reduce the cost

Inactive Publication Date: 2017-11-24
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although CNTs have a large specific surface area, which can enhance the enrichment ability of pollutants to a certain extent, but because CNTs are black, they are easy to form a shielding effect on light, so the addition of CNTs in the composite catalyst is not easy to be too much, which limits Therefore, improving the enrichment ability of composite catalysts for pollutants by modifying the surface of CNTs is an effective way to improve catalyst activity.

Method used

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  • A modified tio <sub>2</sub> /cnts composite catalyst and preparation method thereof
  • A modified tio <sub>2</sub> /cnts composite catalyst and preparation method thereof
  • A modified tio <sub>2</sub> /cnts composite catalyst and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0034] Modified TiO of the present invention 2 / CNTs composite catalyst, its chemical structural formula is:

[0035]

[0036] The above modified TiO 2 The preparation method of / CNTs composite catalyst comprises the steps:

[0037] Step 1, preparation of TiO by sol-hydrothermal method 2 / CNTs composite catalyst: Mix 12mL of n-butyl titanate and 24mL of absolute ethanol evenly, add 0.3g of CNTs, stir at room temperature for 15min, and configure A mixed solution; mix 10mL of 1mol / L HNO 3 Mix evenly with 12mL of absolute ethanol, and mark it as B mixture; under the condition of constant stirring, add B drop by drop to A to form a uniform and transparent sol; transfer the sol into the reaction kettle, put the reaction kettle in an oven, Keep the temperature of 80°C for hydrothermal synthesis. After reacting for 24 hours, take out the product in the reactor and cool it down to room temperature naturally, filter and separate the contents of the reactor, discard the filtrate, a...

Embodiment 2

[0042] Modified TiO of the present invention 2 / CNTs composite catalyst, its chemical structural formula is:

[0043]

[0044] The above modified TiO 2 The preparation method of / CNTs composite catalyst comprises the steps:

[0045] Step 1, preparation of TiO by sol-hydrothermal method 2 / CNTs composite catalyst: mix 12mL of n-butyl titanate and 24mL of absolute ethanol evenly, add 0.5g of CNTs, stir at room temperature for 15min, and configure A mixed solution; mix 10mL of 1mol / L HNO 3 Mix evenly with 12mL of absolute ethanol, and mark it as B mixture; under the condition of constant stirring, add B drop by drop to A to form a uniform and transparent sol; transfer the sol into the reaction kettle, put the reaction kettle in an oven, Keep the temperature of 95°C for hydrothermal synthesis. After reacting for 24 hours, take out the product in the reactor and cool it down to room temperature naturally, filter and separate the contents of the reactor, discard the filtrate, a...

Embodiment 3

[0050] Modified TiO of the present invention 2 / CNTs composite catalyst, its chemical structural formula is:

[0051]

[0052] The above modified TiO 2 The preparation method of / CNTs composite catalyst comprises the steps:

[0053] Step 1, preparation of TiO by sol-hydrothermal method 2 / CNTs composite catalyst: mix 12mL of n-butyl titanate and 24mL of absolute ethanol evenly, and add 0.8g of CNTs, stir at room temperature for 15min, and configure A mixed solution; mix 10mL of 1mol / L HNO 3 Mix evenly with 12mL of absolute ethanol, and mark it as B mixture; under the condition of constant stirring, add B drop by drop to A to form a uniform and transparent sol; transfer the sol into the reaction kettle, put the reaction kettle in an oven, Keep the temperature of 120°C for hydrothermal synthesis. After reacting for 24 hours, take out the product in the reactor and cool it down to room temperature naturally, filter and separate the contents of the reactor, discard the filtra...

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Abstract

The invention discloses a modified TiO2 / CNTs composite catalyst and a preparing method thereof. The modified TiO2 / CNTs composite catalyst can greatly improve an enrichment ability to pollutants in water, so that the photocatalytic reduction ability of heavy metal ions (especially Cr(VI) ions) in the water is improved. The modified catalyst has a good treatment effect on high-concentration heavy metal polluted water, and even if the addition ratio of a carbon nanometer tube in the composite catalyst is not large, the enrichment effect of the composite catalyst to the pollutants in the water is not influenced much. In addition, according to the preparing method, raw materials are easy to obtain, cost is low, the reaction condition is mild, and pollution to environment is free.

Description

technical field [0001] The invention relates to a modified TiO 2 / CNTs composite catalyst, also relates to the preparation method of the above-mentioned modified composite catalyst. Background technique [0002] In recent years, with the discharge of various industrial waste liquids into water bodies, the content of heavy metals in water bodies is getting higher and higher. Water containing heavy metal ions will seriously affect human beings due to long-term stay and accumulation in the environment and gradual enrichment through the food chain. and other biological safety. In addition, acute heavy metal poisoning can cause vomiting, fatigue, coma and even death, while chronic symptoms can lead to long-term low immunity and frequent occurrence of various tumors and chronic diseases. Among them, Cr(VI) is a common heavy metal pollutant in water, which is commonly found in electroplating, tanning and printing and dyeing wastewater, and has strong carcinogenicity. The most com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38B01J31/02C02F1/72C02F101/22
CPCB01J31/0247B01J31/0254B01J31/38B01J35/004C02F1/70C02F2101/22C02F2305/10
Inventor 杨汉培傅小飞朱鸿宇高照郭润强涂艳梅孙慧华聂坤
Owner HOHAI UNIV
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