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Preparation method and application of carbon nanotube supported nano titanium dioxide adsorbent with multi-stage structure

A technology of nano-titanium dioxide and carbon nanotubes, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of affecting the water effluent effect, not easy to settle, and low bulk density, so as to achieve easy recycling and Effects of regeneration, ease of transportation, and increased bulk density

Inactive Publication Date: 2015-05-20
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since carbon nanotubes are one-dimensional nanomaterials, their diameter is small and their packing density is low, only 0.22g cm 3 , even if it is loaded with nano-titanium dioxide, it is not easy to settle in water, which will affect the water effluent effect

Method used

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  • Preparation method and application of carbon nanotube supported nano titanium dioxide adsorbent with multi-stage structure
  • Preparation method and application of carbon nanotube supported nano titanium dioxide adsorbent with multi-stage structure
  • Preparation method and application of carbon nanotube supported nano titanium dioxide adsorbent with multi-stage structure

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Embodiment 1

[0033] A preparation method of the carbon nanotube-supported multi-level structure nano titanium dioxide adsorbent of the present invention includes the following steps:

[0034] (1) Put 4g of carbon nanotubes with a diameter of 30-50nm into a 250mL three-necked flask, and then add 150mL with a concentration of 18.4mol·L -1 The concentration of concentrated sulfuric acid and 50mL is 14mol·L -1 Concentrated nitric acid, ultrasonically dispersed for 10 minutes, reflux oxidation treatment at a temperature of 60 ℃ for 4 hours, after reflux oxidation treatment is poured into water to stop the reaction, centrifuged, and then washed with ultrapure water until the pH of the filtrate is neutral; Scrape off the filter cake layer, then dry it at 80°C for 2 hours, and grind it into powder to obtain surface-treated carbon nanotubes;

[0035] (2) Take 0.3 g of the surface-treated carbon nanotubes prepared in the above step (1) and add them to 50 mL of ethanol for ultrasonic treatment for 10 minut...

Embodiment 2

[0040] A method for preparing the carbon nanotube-loaded multi-level structure nano titanium dioxide adsorbent of the present invention includes the following steps:

[0041] (1) Put 2g of carbon nanotubes with a diameter of 30-50nm into a 250mL three-necked flask, and then add 100mL with a concentration of 18.4mol·L -1 The concentration of concentrated sulfuric acid and 50mL is 10mol·L -1 After the concentrated hydrochloric acid, ultrasonically dispersed for 10min, reflux oxidation treatment at 40℃ for 6h, after reflux oxidation treatment, pour into water to stop the reaction, centrifuge, and then wash with ultrapure water until the pH of the filtrate is neutral; Scrape the filter cake layer, then dry it at 80°C for 5 hours, grind it into powder, and obtain surface-treated carbon nanotubes;

[0042] (2) Take 0.5 g of the surface-treated carbon nanotubes prepared in the above step (1) and add them to 80 mL of ethanol for ultrasonic treatment for 10 minutes, add 5 mL of water, and th...

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Abstract

The invention discloses a preparation method of a carbon nanotube supported nano titanium dioxide adsorbent with a multi-stage structure. The preparation method comprises the following steps: putting a carbon nanotube into a container, adding acid into the container to reflux to obtain a solution, centrifuging the solution, and washing the solution until the solution is neutral; scraping off a filter cake layer, then drying, and grinding into powder to obtain a surface-treated carbon nanotube; ultrasonically processing the carbon nanotube, adding a surfactant and a titanium-containing compound solution, regulating the pH value to 8-12, then performing hydro-thermal synthesis reaction, naturally cooling after reacting, filtering, washing and drying a product to obtain the carbon nanotube supported nano titanium dioxide adsorbent. The adsorbent prepared by the preparation method disclosed by the invention can be used for adsorbing complex wastewater which simultaneously contains heavy metal ions and organic pollutants, wherein the heavy metal ions comprise at least one of lead, copper, cadmium and chromium; the organic pollutants comprise at least one of hydroxamic acid flotation reagents, sulfanilamide flotation reagents, xanthate flotation reagents, black powder flotation reagents and the like. The carbon nanotube supported nano titanium dioxide adsorbent has the advantages of being simple to prepare, large in adsorption capacity, easy to settle, convenient to recycle, and the like.

Description

Technical field [0001] The invention belongs to the technical field of water treatment and water pollution prevention and control, and specifically relates to a preparation method and application of a carbon nanotube loaded titanium dioxide adsorbent. Background technique [0002] In addition to the heavy metal ions and inorganic anions contained in the mineral processing wastewater, various organic and inorganic flotation agents are used in the flotation of ore, so the discharged wastewater often contains heavy metal ions, inorganic anions and organic agents at the same time. The national environmental protection policy requires that the mineral processing wastewater must meet the recycling requirement of more than 75%. If organic chemicals, heavy metal ions and other substances remain in the recycled wastewater, the recycling of wastewater will have a great impact on the beneficiation recovery rate and other performance indicators. In addition, the presence of heavy metal ions...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/62C02F1/58
CPCB01J20/205C02F1/281C02F2101/20C02F2101/22C02F2101/34C02F2101/38C02F2101/40
Inventor 邓景衡余侃萍肖祈春杨国超肖国光
Owner CHANGSHA RES INST OF MINING & METALLURGY
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