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Preparation method of bast fiber-carried titanium dioxide composite material powder

A technology of titanium dioxide and composite materials, applied in chemical instruments and methods, water treatment of special compounds, organic compound/hydride/coordination complex catalysts, etc., can solve the problems of high toxicity and refractory degradation, and achieve strong adsorption performance, The effect of good photocatalytic degradation performance and simple preparation process

Inactive Publication Date: 2016-03-23
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fundamentally solve the long-standing problem that traditional treatment methods cannot selectively remove low-concentration, highly toxic, refractory organic pollutants under the condition of a large number of general organic / inorganic substances coexisting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A preparation method of hemp fiber loaded titanium dioxide composite material powder, it comprises the following steps:

[0015] 1) According to the number of parts by mass, at first obtain 1 part of pure hemp fiber, pulverize each time for 30 minutes, then use 10%wt sodium hydroxide to degrease the pulverized hemp fiber, remove impurities, and purify; put the hemp fiber Soak in the prepared 10%wt sodium hydroxide solvent, then magnetically stir for 2 hours, use ultrasonic sonication for 30min, then add 3 parts of 95% dilute sulfuric acid to adjust the pH value of the fiber mixture to 2-3, and remove hydrogen Sodium oxide, after carrying out 5 times of suction filtration, put the fiber into the oven and dry it for 12 hours, carry out carboxymethylation to the hemp fiber that has been processed, take out the hemp fiber of drying, add 5 parts of sodium chloroacetate to carry out carboxymethylation to it Methylation, to generate carboxymethyl groups on the surface of fiber...

Embodiment 2

[0019] A preparation method of hemp fiber loaded titanium dioxide composite material powder, it comprises the following steps:

[0020] 1) According to the number of parts by mass, at first obtain 1 part of pure hemp fiber, pulverize each time for 35 minutes, then use 12%wt sodium hydroxide to degrease the pulverized hemp fiber, remove impurities, and purify; put the hemp fiber Add the prepared 12%wt sodium hydroxide solution, then magnetically stir for 2.5 hours, use ultrasonic ultrasonic treatment for 35min, then add 4 parts of 95% dilute sulfuric acid, adjust the pH value of the fiber mixture to 2-3, remove sodium hydroxide, Carry out 6 times of suction filtration, put fiber into oven and dry for 12.5 hours, carry out carboxymethylation to the processed hemp fiber, take out the dried hemp fiber, add 6 parts of sodium chloroacetate to carry out carboxymethylation to it , to generate carboxymethyl groups on the surface of the fiber branches, magnetically stirred for 2.5 hours...

Embodiment 3

[0024] A preparation method of hemp fiber loaded titanium dioxide composite material powder, it comprises the following steps:

[0025] 1) by mass parts, at first obtain 2 parts of pure hemp fibers, pulverize each time for 40 minutes, then use 13%wt sodium hydroxide to degrease the pulverized hemp fibers, remove impurities, and purify; put the hemp fibers Soak in the prepared solvent, then magnetically stir for 3 hours, use ultrasonic sonication for 30 minutes, then add 4 parts of 95% dilute sulfuric acid to adjust the pH value of the fiber mixture to 2-3, remove sodium hydroxide, and carry out 8 Suction filtration for the first time, put the fiber into an oven and dry for 13 hours, carry out carboxymethylation to the treated hemp fiber, take out the dried hemp fiber, add a certain amount of sodium chloroacetate to carry out carboxymethylation on it, and make the fiber Carboxymethyl groups are formed on the surface of the branches, magnetically stirred for 3 hours, ultrasonica...

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PUM

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Abstract

A preparation method of a bast fiber-carried titanium dioxide composite material powder comprises following steps: 1) collecting clean bast fibers, crushing the fibers before defatting the fibers with sodium hydroxide, and removing impurities for purifying; placing the bast fibers in a solvent for infiltration, carrying magnetic stirring and ultrasonic treatment with ultrasonic wave, adding dilute sulfuric acid, removing the sodium hydroxide, carrying out suction filtration, drying the fibers in an oven, taking out dried bast fibers, adding sodium chloroacetate to carry out carboxymethylation for the fibers so that carboxymethyl is generated on the surfaces of branches of the fibers, carrying out ultrasonic treatment after magnetic stirring, adjusting to neutrality, and drying the fibers in the oven; 2) weighing carboxymethyl cellulose, butyl titanate, absolute ethyl alcohol and dimethyl sulfoxide, placing them in a beaker, stirring them at room temperature prior to subjecting a mixture to ultrasound, carrying out magnetic stirring, and carrying out drying in a vacuum oven; 3) subjecting a powder to a photo-catalytic experimental test, determining degrading ability from fading of a simulated pollution source Rhodamine B, and bagging and storing the prepared composite fiber powder.

Description

technical field [0001] The invention relates to a hemp fiber-loaded titanium dioxide composite material powder and a preparation method thereof. The carboxymethylated hemp fiber is loaded with titanium dioxide so that the composite material has photocatalytic ability, and belongs to the technical field of composite material preparation. Background technique [0002] Traditional printing and dyeing wastewater treatment methods are not ideal, mainly because the molecular structure of dyes in wastewater is stable, the composition is complex, the decolorization rate and COD removal rate are not high, and secondary pollution is easy to occur. Using the photocatalytic properties of semiconductor materials, many organic substances that cannot be removed by chemical and biological methods can be completely decomposed into carbon dioxide and water at room temperature without causing secondary pollution. It can be used as sunlight and ultraviolet light contained in fluorescent lamps. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J20/24B01J20/30C02F1/28C02F1/30C02F1/32
CPCB01J20/06C02F1/288C02F1/30C02F1/32B01J20/24B01J20/28026B01J31/38C02F2101/308C02F2305/10B01J35/39
Inventor 杨子昂万军民胡智文俞颜佳章李汝华
Owner ZHEJIANG SCI-TECH UNIV
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