Method capable of photocatalytically degrading dyes to prepare copper-loaded nano titanium dioxide chitosan composite microspheres in microfluidic mode

A technology of nano-titanium dioxide and composite microspheres, which is applied in the field of photocatalytic degradation materials preparation, can solve the problems of complex components, poor hydrophilicity, high organic content, etc., to protect the environment and water resources, reduce toxic components, and have a large catalytic surface area. Effect

Active Publication Date: 2018-11-23
NANTONG TEXTILE & SILK IND TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] (3) The chromium, lead, mercury, arsenic, zinc and other heavy metal salts in the heavy metal wastewater in the dye cannot be biodegraded, they can exist in the natural environment for a long time, and will continue to pass through the food chain and accumulate in the human body
[0007] (4) The content of organic matter in wastewater is high, the composition is complex, and the content of harmful substances is high
However, pure nanometer titanium dioxide semiconductor material also has some shortcomings as a catalyst: firstly, it has a wide band gap (Eg=3.2ev), which can only absorb ultraviolet light with a wavelength less than 387nm, and is

Method used

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  • Method capable of photocatalytically degrading dyes to prepare copper-loaded nano titanium dioxide chitosan composite microspheres in microfluidic mode
  • Method capable of photocatalytically degrading dyes to prepare copper-loaded nano titanium dioxide chitosan composite microspheres in microfluidic mode
  • Method capable of photocatalytically degrading dyes to prepare copper-loaded nano titanium dioxide chitosan composite microspheres in microfluidic mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Weigh 11g of tetrabutyl titanate and add 37ml of absolute ethanol, ultrasonically oscillate for 15 minutes, as solution A; measure 11ml of deionized water and 12ml of glacial acetic acid, add 38ml of absolute ethanol as solution B, put it into a three-necked flask, and Stir in a water bath at 23°C. Pour liquid A into the constant pressure funnel, and slowly drop it into liquid B by adjusting the switch. This process lasts for about 2.2 hours, during which the solution gradually turns blue. After dripping, continue to stir for 50 minutes, then transfer to a petri dish and let it stand until a gel is formed.

[0048] Take by weighing 12g of the prepared nano-titanium dioxide gel and put it into a three-necked flask, take the 120g / L amino-terminated hyperbranched polymer (HBP-NH2) 10ml and 40ml of absolute ethanol prepared in the laboratory for proportioning and mixing and transfer Put it into a constant pressure funnel, degumming at 23 degrees Celsius, then add 0.7ml of ...

Embodiment 2

[0052] Weigh 9g of tetrabutyl titanate and add 32ml of absolute ethanol, ultrasonically oscillate for 8 minutes, as solution A; measure 8ml of deionized water and 8ml of glacial acetic acid, add 32ml of absolute ethanol as solution B, put them into a three-necked flask, and Stir in a 17°C water bath. Pour liquid A into the constant pressure funnel, and adjust the switch to slowly drip into liquid B. This process lasts for about 1.8 hours, during which the solution gradually turns blue. After the dripping is finished, continue to stir for 30 minutes, then transfer to a petri dish, and let it stand until a gel is formed.

[0053] Weigh 9g of the prepared nano-titanium dioxide gel and put it into a three-necked flask, take the 90g / L amino-terminated hyperbranched polymer (HBP-NH2) 6ml and 44ml of absolute ethanol prepared in the laboratory for proportioning and mixing and transfer Put it into a constant pressure funnel, degumming at 16 degrees Celsius, then add 0.5ml of copper s...

Embodiment 3

[0057] Weigh 10g of tetrabutyl titanate and add 37ml of absolute ethanol, ultrasonically oscillate for 11 minutes, as solution A; measure 11ml of deionized water and 9ml of glacial acetic acid, add 35ml of absolute ethanol as solution B, put them into a three-necked flask, and Stir in a 20°C water bath. Pour liquid A into the constant pressure funnel, and slowly drop into liquid B by adjusting the switch. This process lasts for about 2.1 hours, during which the solution gradually turns blue. After dripping, continue to stir for 35 minutes, then transfer to a petri dish and let it stand until a gel is formed.

[0058] Weigh 10g of the prepared nano-titanium dioxide gel and put it into a three-necked flask, take the 110g / L amino-terminated hyperbranched polymer (HBP-NH2) 8ml and 42ml of absolute ethanol prepared in the laboratory and carry out proportioning and mixing and transfer Put it into a constant pressure funnel, degumming at 25 degrees Celsius, then add 0.55ml of copper...

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Abstract

The invention discloses a method capable of photocatalytically degrading dyes to prepare copper-loaded nano titanium dioxide chitosan composite microspheres in a microfluidic mode. The method comprises the steps: adding a tetrabutyl titanate solution into an acid solution, mixing to form nano titanium dioxide gel, utilizing an organic solvent to mixing the nano titanium dioxide gel with amine terminated hyperbranched polymer to obtain mixed liquor, then adding a copper ion solution into the mixed liquor, drying to obtain copper-loaded nano titanium dioxide powder, adding the copper-loaded nanotitanium dioxide powder and chitosan into the acid solution to be mixed to obtain a dispersion phase, mixing sorbitan fatty acid ester with a hydrocarbon mixture to obtain a continuous phase, mixingthe dispersion phase with the continuous phase in a microfluidic mode and drying to obtain the copper-loaded nano titanium dioxide chitosan composite microspheres. According to the method disclosed bythe invention, the composite microspheres are prepared in the microfluidic mode, so that a material utilization rate is high; the microspheres have large self catalyzing surface areas and high catalytic activity, can effectively reduce dye concentration, reduce toxic components in dye wastewater and protect environment and water resources.

Description

technical field [0001] The invention relates to a method for preparing a photocatalytic degradation material, in particular to a method for preparing copper-loaded nano-titanium dioxide chitosan composite microspheres capable of photodegrading dye microfluidics. Background technique [0002] The continuous development of society promotes the development of the chemical industry, but industrial wastewater is also increasing in the process of development. Dye wastewater is one of the main harmful industrial wastewater, which mainly comes from the production industry of dyes and dye intermediates. It is composed of the mother liquor of crystallization of various products and intermediates, materials lost during the production process, and sewage from washing the ground. With the continuous growth of the dye industry, its production wastewater has become a major source of water pollution. A large number of pollutants are produced in the process of dye production, such as sulfon...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01J35/00B01J35/08B01J35/10C02F1/30C02F101/30
CPCB01J31/38B01J35/004B01J35/08B01J35/1004C02F1/30C02F2101/308C02F2305/10
Inventor 张雨凡林红陈宇岳付凡左琴平张德锁
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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