Preparation method of bentonite supported silver vanadate photo-catalyst

A technology of bentonite and catalyst, which is applied in the field of water treatment, can solve the problems of reducing the treatment effect, easy to agglomerate, and difficult to separate from the water phase, and achieve the effect of enhancing the adsorption effect

Active Publication Date: 2014-08-20
无锡智慧兴宜信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The silver vanadate prepared by these methods are all nanoparticles, although they have a higher specific surface area, they are easy to agglomerate and reduce the treatment effect, and it is difficult to separate from the water after the wastewater is treated, so that its practicability is greatly reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 8g of vanadium pentoxide to 25mL of nitric acid solution with a concentration of 0.5mol / L, stir for 40min, and generate VO 2 + solution; to VO 2 + Add 10 g of dry and crushed commercially available calcium-based bentonite through a 100-mesh sieve to the solution, stir for 8 hours, and VO 2 + Exchange with the cation between the bentonite layers, precipitate and separate, and wash with distilled water for 3 times to obtain VO 2 + pillared bentonite, the VO 2 + The pillared bentonite was dried at 105 °C and then heated to 400 °C for calcination, and the VO in the bentonite layer 2 + convert to V 2 o 5 , making V 2 o 5 Modified bentonite: take 1.2mmol silver nitrate and configure it into a 15mmol / L solution, add dilute ammonia water dropwise to the solution, shake while adding, until the precipitation is complete, separate the solid from the liquid, and pour off the supernatant, Continue to add dilute ammonia water dropwise to the solid until the precipita...

Embodiment 2

[0020] Add 5g of vanadium pentoxide to 25mL of nitric acid solution with a concentration of 0.1mol / L, stir for 20min, and generate VO 2 + solution; to VO 2 + Add 8g of dry and crushed commercially available sodium bentonite through a 100-mesh sieve to the solution, stir for 4h, VO 2 + Exchange with the cation between the bentonite layers, precipitate and separate, and wash twice with distilled water to obtain VO 2 + pillared bentonite, the VO 2 + The pillared bentonite was dried at 105°C and then heated to 300°C for calcination, and the VO in the bentonite layer 2 + convert to V 2 o 5 , making V 2 o 5 Modified bentonite: Weigh 1mmol silver nitrate to prepare a 10mmol / L solution, add dilute ammonia water dropwise to the solution, shake while adding dropwise, until the precipitation is complete, separate the solid from the liquid, pour out the supernatant, continue Add dilute ammonia water dropwise to the solid until the first precipitate just dissolves completely t...

Embodiment 3

[0023] Add 7g of vanadium pentoxide to 25mL of nitric acid solution with a concentration of 0.4mol / L, stir for 30min, and generate VO 2 + solution; to VO 2 + Add 10 g of dry and crushed commercially available calcium-based bentonite through a 100-mesh sieve to the solution, stir for 6 hours, and VO 2 + Exchange with the cation between the bentonite layers, precipitate and separate, and wash with distilled water for 3 times to obtain VO 2 + pillared bentonite, the VO 2 + The pillared bentonite was dried at 105 °C and then heated to 400 °C for calcination, and the VO in the bentonite layer 2 + convert to V 2 o 5 , making V 2 o 5 Modified bentonite: take 1.2mmol silver nitrate and configure it into a 15mmol / L solution, add dilute ammonia water dropwise to the solution, shake while adding, until the precipitation is complete, separate the solid from the liquid, and pour off the supernatant, Continue to add dilute ammonia water dropwise to the solid until the precipita...

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Abstract

The invention discloses a preparation method of bentonite supported silver vanadate photo-catalyst. The preparation method comprises the following steps: adding vanadium pentoxide into nitrite acid solution, stirring to form a VO<2+> solution; adding dried bentonite powder into the VO<2+> solution, stirring, precipitating, separating, washing, drying at the temperature of 105 DEG C, then calcining by heating to 300-400 DEG C and thus preparing bentonite modified by V2O5; weighing 1-1.2mmol of silver nitrate and preparing into a 10-15mmol/L solution, dropwise adding diluted ammonia water into the solution, dropwise adding and vibrating simultaneously, carrying out solid-liquid separation after fully precipitating, pouring off supernatant liquor, continuously adding the diluted ammonia water into the solid dropwise till the primary sediment is just fully dissolved; adding the bentonite modified by V2O5 into a Tollen reagent , stirring for 4-6 hours, separating the sediment, washing the sediment with distilled water for 3-4 times, then drying at the temperature of 100-105 DEG C to obtain the bentonite supported silver vanadate photo-catalyst. By virtue of the method, silver vanadate is successfully fixed in bentonite layers, thereby facilitating the absorption and the catalysis, and fully the nanometer effect of the catalyst is fully exerted.

Description

technical field [0001] The invention belongs to the field of water treatment, and relates to a preparation method of a bentonite-loaded silver vanadate photocatalyst, in particular to a photocatalytic material for treating organic waste water and a preparation method thereof. Background technique [0002] At present, with the rapid development of industrial technology, the water resources that human beings rely on for survival are polluted to varying degrees, and water resource pollution has become an urgent problem that countries all over the world are facing. Pollutants in water, especially toxic organic pollutants, not only cause environmental pollution and ecological damage, but also seriously endanger human health. These organic pollutants include polycyclic aromatic hydrocarbons, polychlorinated biphenyls, pesticides, environmental interferons, dyes, etc. [0003] Bentonite is a clay rock mainly composed of montmorillonite, which has broad application prospects in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/68C02F1/30
Inventor 马建锋王凯李良银姚超
Owner 无锡智慧兴宜信息技术有限公司
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