Full-spectrum response bismuth oxide/silver phosphate/carbon nanotube sponge composite photocatalyst for drilling waste liquid treatment and preparation method and application thereof

A technology of carbon nanotube sponge and drilling waste fluid, which is applied in the direction of physical/chemical process catalysts, mining wastewater treatment, chemical instruments and methods, etc. It can solve the problem of weak adsorption capacity of non-polar organic matter, lack of adsorption and degradation, and restriction of photocatalysis Effectiveness and other issues, to achieve the effect of improving catalytic activity, improving separation rate, and strong adsorption

Active Publication Date: 2020-06-05
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalyst carrier is only based on one-dimensional carbon nanotubes, so there are problems such as low specific surface area and weak adsorption capacity for non-polar organic substances, which greatly restricts its photoca...

Method used

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  • Full-spectrum response bismuth oxide/silver phosphate/carbon nanotube sponge composite photocatalyst for drilling waste liquid treatment and preparation method and application thereof
  • Full-spectrum response bismuth oxide/silver phosphate/carbon nanotube sponge composite photocatalyst for drilling waste liquid treatment and preparation method and application thereof
  • Full-spectrum response bismuth oxide/silver phosphate/carbon nanotube sponge composite photocatalyst for drilling waste liquid treatment and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A method for preparing a full-spectrum response bismuth oxide / silver phosphate / carbon nanotube sponge composite photocatalyst for drilling waste fluid treatment, comprising the following steps:

[0047] (1) 1.5g silver nitrate is ultrasonically dispersed in the mixed solvent of 100mL ethanol, ethylene glycol and water, wherein, ethanol: ethylene glycol: the volume ratio of water is 1:1:9, obtains the organic alcohol aqueous solution of silver nitrate, Then put 0.3g carbon nanotube sponge into the organic alcohol aqueous solution of silver nitrate, under the condition of 25 ℃, stir for 1 hour with the stirring speed of 300r / min on the magnetic stirrer, make the porous structure of carbon nanotube sponge Uniformly adsorb silver nitrate in the medium to obtain a carbon nanotube sponge / silver nitrate mixture; uniformly disperse 0.5g disodium hydrogen phosphate in 100mL water to obtain a disodium hydrogen phosphate solution, which is added dropwise to carbon nanotube ...

Embodiment 2

[0054] A method for preparing a full-spectrum response bismuth oxide / silver phosphate / carbon nanotube sponge composite photocatalyst for drilling waste fluid treatment, comprising the following steps:

[0055] (1) 1.5g silver nitrate is ultrasonically dispersed in the mixed solvent of 100mL ethanol, ethylene glycol and water, wherein, ethanol: ethylene glycol: the volume ratio of water is 1:1:9, obtains the organic alcohol aqueous solution of silver nitrate, Then put 0.3g carbon nanotube sponge into the organic alcohol aqueous solution of silver nitrate, under the condition of 25 ℃, stir for 1 hour with the stirring speed of 300r / min on the magnetic stirrer, make the porous structure of carbon nanotube sponge Uniformly adsorb silver nitrate in the medium to obtain a carbon nanotube sponge / silver nitrate mixture; uniformly disperse 0.5g disodium hydrogen phosphate in 100mL water to obtain a disodium hydrogen phosphate solution, which is added dropwise to carbon nanotube ...

Embodiment 3

[0059] A method for preparing a full-spectrum response bismuth oxide / silver phosphate / carbon nanotube sponge composite photocatalyst for drilling waste fluid treatment, comprising the following steps:

[0060] (1) 1.5g silver nitrate is ultrasonically dispersed in the mixed solvent of 100mL ethanol, ethylene glycol and water, wherein, ethanol: ethylene glycol: the volume ratio of water is 1:1:9, obtains the organic alcohol aqueous solution of silver nitrate, Then put 0.3g carbon nanotube sponge into the organic alcohol aqueous solution of silver nitrate, under the condition of 25 ℃, stir for 1 hour with the stirring speed of 300r / min on the magnetic stirrer, make the porous structure of carbon nanotube sponge Uniformly adsorb silver nitrate in the medium to obtain a carbon nanotube sponge / silver nitrate mixture; uniformly disperse 0.5g disodium hydrogen phosphate in 100mL water to obtain a disodium hydrogen phosphate solution, which is added dropwise to carbon nanotube ...

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Abstract

The invention provides a full-spectrum response bismuth oxide/silver phosphate/carbon nanotube sponge composite photocatalyst for drilling waste liquid treatment and a preparation method and application thereof. The preparation method comprises the steps of adding carbon nanotube sponge into an organic alcohol-water solution of silver nitrate, adding a disodium hydrogen phosphate solution, carrying out a hydrothermal reaction process on the obtained mixed solution, carrying out filtering, washing and drying to obtain a silver phosphate/carbon nanotube sponge composite material, adding sodium bismuthate into a sodium hydroxide solution, then adding the silver phosphate/carbon nanotube sponge composite material, carrying out a hydrothermal reaction process and filtering, washing and freeze-drying to obtain the product. The bismuth oxide/silver phosphate/carbon nanotube sponge three-dimensional composite photocatalyst prepared by the method has the advantages of full-spectrum response, high photocatalytic activity, low photo-induced electron-hole recombination rate and high non-polar substance adsorption and degradation capacity. Under the irradiation of visible light and near-infrared light, the method is used for in-situ treatment on organic pollutants such as polycyclic aromatic hydrocarbon in the drilling waste liquid.

Description

technical field [0001] The invention relates to a full-spectrum response bismuth oxide / silver phosphate / carbon nanotube sponge composite photocatalyst for drilling waste fluid treatment, a preparation method and application thereof, and belongs to the field of drilling waste fluid treatment. Background technique [0002] With the increasing depth and difficulty of drilling, the types and amounts of chemical additives in drilling fluids are also increasing, resulting in a sharp increase in the difficulty of disposal of waste drilling fluids. In 2019, the number of drilling operations in my country will reach 19,500 wells, and at least 5 million tons of waste drilling fluid will be produced every year. During the drilling process, a large amount of oil-based lubricants are often added to improve the performance of the drilling fluid, or crude oil mixed into the drilling fluid when drilling into the oil layer will lead to a high content of polycyclic aromatic hydrocarbons in th...

Claims

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Application Information

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IPC IPC(8): B01J27/186C02F1/72C02F1/30C02F101/32C02F103/10
CPCB01J27/186B01J35/004C02F1/30C02F1/725C02F2101/327C02F2103/10C02F2305/10
Inventor 金家锋孙金声吕开河白英睿刘敬平黄贤斌王金堂
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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