CN104525173B

CN104525173B - A kind of CNT composite Ti O2the preparation method of green deep water treatment agent

Info

Publication number: CN104525173B
Application number: CN201410843674.8A
Authority: CN
Inventors: 刘保江
Original assignee: 东华大学; 上海三伊环境科技有限公司
Priority date: 2014-12-25
Filing date: 2014-12-25
Publication date: 2016-08-24
Also published as: CN104525173A

Abstract

The present invention relates to a kind of CNT composite Ti O₂The preparation method of green deep water treatment agent, including: (1) is the most carboxylated by CNT, amination modified, response type CNT is prepared in 2,4,6 trifluoro 5 chloropyrimide modifications；(2) by nano-TiO₂P25, stabilizer, template and response type CNT join in phosphate buffer, stir 30～60min, form suspension；(3) filtration drying obtains product.The present invention's is with low cost, and preparation method is simple, and the requirement to equipment is low, and operability is good；The water treatment agent of the present invention can remove water middle and high concentration organic pollution, it is adaptable to the advanced treating of various waste water, environmental protection non-secondary pollution, and have antibacterial, deodorization, can adsorb the advantages such as other heavy metal ion.

Description

A kind of CNT composite Ti O2The preparation method of green deep water treatment agent

Technical field

The invention belongs to water treatment agent field, particularly to a kind of CNT composite Ti O₂The preparation method of green deep water treatment agent.

Background technology

The water in the whole world the most about 10% is directly used by the mankind.Lion's share, 70% for agricultural, and remaining 20% is industrial.The blowdown of China is about the 20% of the whole world, and it has to the fresh water of global 5%.Therefore, solve pollution problem to put on the agenda.In textile printing and dyeing, leather, the paper industry course of processing, employing pollution environment and harmful auxiliary agent in a large number, these auxiliary agents mostly discharge with the form of liquid and pollute environment, biological degradability is poor, toxicity is big, and free formaldehyde content is high, the content overproof of heavy metal ion.Wherein, printing and dyeing dressing becomes water heavy polluter the most undisputedly.From starching start to desizing, wash, scouring and bleaching, mercerising, then dyeing and printing, may also need coating, be directed to washing by the every procedure of this flow process, and every every kg of material of procedure need 20L water consumption.Result is that the water consumption of every kilogram of raw cotton adds up up to 200L during dressing.When showing at shopper window after the in men's style vest of a standard customizes, more than 2000L water production and processing it time used up (cloth: cotton textiles, 125g/m).

The currently used method processing waste water mainly has: physical partition method, biological degradation method, chemical decomposition method, but these methods all have some limitations, and are unfavorable for sustainable development.Thus, people start to be devoted to exploitation efficiently, low energy consumption, applied widely and have the pollutant clearance technique of deep oxidation ability.In recent years, a lot of scholars are by TiO₂For Degradation of Organo-pollutants in Water with Photo-catalysis, by TiO₂Loading on CNT, preparing efficient photocatalyst becomes the focus of current research.

Summary of the invention

The technical problem to be solved is to provide a kind of CNT composite Ti O₂The preparation method of green deep water treatment agent, the method is simple to operate, with low cost, and the requirement to equipment is low；Water treatment agent is applicable to the advanced treating of various waste water, environmental protection non-secondary pollution.

A kind of CNT composite Ti O of the present invention₂The preparation method of green deep water treatment agent, including:

(1) by CNT at H₂SO₄And HNO₃Room temperature ultrasonic reaction 30～60min in mixed liquor, washing to neutrality, room temperature in vacuo is dried, is obtained carboxylic carbon nano-tube；Then carboxylic carbon nano-tube is distributed in excess diethylenetriamine, adds 2-(7-azo BTA)-N, N, N', N'-tetramethylurea hexafluorophosphoric acid ester, 40～50 DEG C of reactions 5～6h, washing with alcohol, room temperature in vacuo is dried, is obtained aminated carbon nano tube；Then by the mixed liquor of aminated carbon nano tube ultrasonic disperse to water and acetone, regulation pH value is 5～6, ice-water bath dropping 2,4,6-tri-fluoro-5-chloropyrimide, regulation pH value is 6～6.5,20～30 DEG C of ultrasonic reactions 24～48h, washing with alcohol, washing, room temperature in vacuo is dried, and irradiation (irradiation 3min under 222nm quasi-molecule ultraviolet source) obtains response type CNT；

(2) by nano-TiO₂Response type CNT in P25, stabilizer, template and step (1) joins in phosphate buffer, stirs 30～60min, forms suspension；Wherein, nano-TiO₂P25 is 1:5～1:20 with the mass ratio of response type CNT；

(3) regulating pH value with alkaline solution is 5～6, is heated to 80～100 DEG C of backflows 6～24h and filters, obtaining CNT composite Ti O₂Green deep water treatment agent.

CNT in described step (1) and H₂SO₄And HNO₃The ratio of mixed liquor is 10～20g:4L；Wherein, H₂SO₄And HNO₃Volume ratio be 1:1～5:1.

Carboxylic carbon nano-tube in described step (1) and 2-(7-azo BTA)-N, the mass ratio of N, N', N'-tetramethylurea hexafluorophosphoric acid is 5～8:0.1～0.6.

Aminated carbon nano tube in described step (1) is 4～4.5g:1L with the ratio of water and the mixed liquor of acetone；Wherein, the volume ratio of water and acetone is 3:1～5:1.

Aminated carbon nano tube in described step (1) is 4～4.5:4～6 with the mass ratio of 2,4,6-tri-fluoro-5-chloropyrimide.

Described step (1) uses sodium carbonate liquor regulation pH value.

Nano-TiO in described step (2)₂P25 concentration is 0.01～0.2mol/L.

Stabilizer in described step (2) is the one in disodiumedetate, tetrasodium ethylenediamine tetraacetate, sodium gluconate, BTCA；Stabilizer concentration is 0.01～0.1mol/L.

The triblock polyether P123 that template is mass ratio 1:3 in described step (2) and the mixture of triblock copolymer F127；Template concentration is 0.01～0.1mol/L.

Phosphate buffer in described step (2) is made up of concentration 0.025～0.05mol/L sodium dihydrogen phosphate and 0.05～0.1mol/L dibastic sodium phosphate.

Alkaline solution in described step (3) is concentration 0.5mol/L～the sodium hydroxide of 1.5mol/L or the aqueous solution of potassium hydroxide.

CNT, as a kind of porous mass, has special interlayer characteristic, can be at its area load nano-TiO₂P25 microgranule, is prepared as loaded catalyst.This loaded photocatalyst can improve the dispersibility of photocatalyst, is beneficial to recycle and reuse.

Present invention feature and the nano-TiO such as utilize the porous of CNT, high adsorption capacity and water easily separated₂The photocatalytic activity of P25 combines, by nano-TiO₂Successfully load on CNT, it is prepared as the visible-light photocatalysis material of the high catalytic activity that can be suspended in waste water and can be separated from water smoothly, and it is applied to the advanced treating of waste water, can realize water middle and high concentration organic pollution oxidation removal, rather than transfer to elsewhere, it is the Technology of an environment-friendly type.

Beneficial effect

(1) present invention is with low cost, and preparation method is simple, and the requirement to equipment is low, and operability is good；

(2) water treatment agent of the present invention can remove water middle and high concentration organic pollution, it is adaptable to the advanced treating of various waste water, environmental protection non-secondary pollution, and have antibacterial, deodorization, can adsorb the advantages such as other heavy metal ion；

(3) water treatment agent of the present invention can overcome the deficiency of existing bismuthino water treatment agent, and water treatment efficiency is good, can recycle.

Detailed description of the invention

Below in conjunction with specific embodiment, the present invention is expanded on further.Should be understood that these embodiments are merely to illustrate the present invention rather than limit the scope of the present invention.In addition, it is to be understood that after having read the content that the present invention lectures, the present invention can be made various changes or modifications by those skilled in the art, and these equivalent form of values fall within the application appended claims limited range equally.

Embodiment 1

(1) it is the H of 1:1 by 10g CNT in 4L volume ratio₂SO₄And HNO₄Room temperature ultrasonic reaction 30min in mixed liquor, washing to neutrality, room temperature in vacuo is dried 48h, is obtained 5g carboxylic carbon nano-tube；Then above-mentioned 5g carboxylic carbon nano-tube is distributed in excess diethylenetriamine, adds 100mg 2-(7-azo BTA)-N, N, N', N'-tetramethylurea hexafluorophosphoric acid ester, 40 DEG C of reaction 5h, washing with alcohol, room temperature in vacuo is dried 48h, is obtained 4g aminated carbon nano tube；Finally by 4g aminated carbon nano tube ultrasonic disperse in the mixed liquor of the water that 1L volume ratio is 3:1 and acetone, it is 5 with sodium carbonate liquor regulation pH value, the ice-water bath dropping fluoro-5-chloropyrimide of 4g 2,4,6-tri-, it is 6 with sodium carbonate liquor regulation pH value, 20 DEG C of ultrasonic reaction 24h, washing with alcohol, washing, room temperature in vacuo dries 48h, and under 222nm quasi-molecule ultraviolet source, irradiation 3min obtains response type CNT；

(2) by nano-TiO₂P25, disodiumedetate, mass ratio are the triblock polyether P123 of 1:3 and in the mixture of triblock copolymer F127 and above-mentioned steps (1), response type CNT joins in the buffer that concentration is 0.025mol/L sodium dihydrogen phosphate and 0.05mol/L dibastic sodium phosphate composition, stirring 30min, forms suspension；Wherein nano-TiO₂The concentration of P25 is 0.01mol/L, the concentration of stabilizer is 0.01mol/L, the concentration of template is 0.05mol/L.

(3) pH value with the sodium hydrate aqueous solution above-mentioned suspension of regulation of concentration 0.5mol/L is 5, and at heating 80 DEG C, reflux 6h, filters, obtains product；Wherein nano-TiO₂P25 is 1:5 with the mass ratio of CNT.

Embodiment 2

(1) it is the H of 3:1 by 10g CNT in 4L volume ratio₂SO₄And HNO₄Room temperature ultrasonic reaction 45min in mixed liquor, washing to neutrality, room temperature in vacuo is dried 54h, is obtained 6.5g carboxylic carbon nano-tube；Then above-mentioned 5g carboxylic carbon nano-tube is distributed in excess diethylenetriamine, adds 300mg 2-(7-azo BTA)-N, N, N', N'-tetramethylurea hexafluorophosphoric acid ester, 45 DEG C of reaction 5h, washing with alcohol, room temperature in vacuo is dried 48h, is obtained 4.2g aminated carbon nano tube；Finally by 4.2g aminated carbon nano tube ultrasonic disperse in the mixed liquor of the water that 1L volume ratio is 4:1 and acetone, it is 5.5 with sodium carbonate liquor regulation pH value, the ice-water bath dropping fluoro-5-chloropyrimide of 5g 2,4,6-tri-, it is 6.2 with sodium carbonate liquor regulation pH value, 25 DEG C of ultrasonic reaction 36h, washing with alcohol, washing, room temperature in vacuo dries 48h, and under 222nm quasi-molecule ultraviolet source, irradiation 3min obtains response type CNT；

(2) by nano-TiO₂P25, sodium gluconate, mass ratio are the triblock polyether P123 of 1:3 and in the mixture of triblock copolymer F127 and above-mentioned steps (1), response type CNT joins in the buffer that concentration is 0.03mol/L sodium dihydrogen phosphate and 0.05mol/L dibastic sodium phosphate composition, stirring 45min, forms suspension；Wherein nano-TiO₂The concentration of P25 is 0.01mol/L, the concentration of stabilizer is 0.03mol/L, the concentration of template is 0.07mol/L.

(3) pH value with the sodium hydrate aqueous solution above-mentioned suspension of regulation of concentration 0.5mol/L is 7, and at heating 90 DEG C, reflux 16h, filters, obtains product；Wherein nano-TiO₂P25 is 1:15 with the mass ratio of CNT.

Embodiment 3

(1) it is the H of 5:1 by 10g CNT in 4L volume ratio₂SO₄And HNO₄Room temperature ultrasonic reaction 60min in mixed liquor, washing to neutrality, room temperature in vacuo is dried 60h, is obtained 8g carboxylic carbon nano-tube；Then above-mentioned 8g carboxylic carbon nano-tube is distributed in excess diethylenetriamine, adds 600mg 2-(7-azo BTA)-N, N, N', N'-tetramethylurea hexafluorophosphoric acid ester, 50 DEG C of reaction 5h, washing with alcohol, room temperature in vacuo is dried 48h, is obtained 4.5g aminated carbon nano tube；Finally by 4.5g aminated carbon nano tube ultrasonic disperse in the mixed liquor of the water that 1L volume ratio is 5:1 and acetone, it is 6 with sodium carbonate liquor regulation pH value, the ice-water bath dropping fluoro-5-chloropyrimide of 6g 2,4,6-tri-, it is 6.5 with sodium carbonate liquor regulation pH value, 30 DEG C of ultrasonic reaction 48h, washing with alcohol, washing, room temperature in vacuo dries 48h, and under 222nm quasi-molecule ultraviolet source, irradiation 3min obtains response type CNT；

(2) by nano-TiO₂P25, BTCA, mass ratio are the triblock polyether P123 of 1:3 and in the mixture of triblock copolymer F127 and above-mentioned steps (1), response type CNT joins in the buffer that concentration is 0.05mol/L sodium dihydrogen phosphate and 0.1mol/L dibastic sodium phosphate composition, stirring 60min, forms suspension；Wherein nano-TiO₂Concentration 0.15mol/L of P25, the concentration of stabilizer are 0.05mol/L, the concentration of template is 0.1mol/L.

(3) pH value with the potassium hydroxide aqueous solution above-mentioned suspension of regulation of concentration 1.5mol/L is 9, and at heating 100 DEG C, reflux 24h, filters, obtains product；Wherein nano-TiO₂P25 is 1:20 with the mass ratio of CNT.

The dyeing waste water of the printing and dyeing mill sampled with the same time, for processing object, is separately added into the water treatment agent of embodiment 1～3 gained of variable concentrations in waste water, and after 6 hours sun exposures, water treatment agent is as shown in the table to the percent of decolourization of dyeing waste water:

Percent of decolourization COD clearance Embodiment 1 99.5% 91.1% Embodiment 2 99.4% 92.3% Embodiment 3 99.6% 93.4%

Claims

1. a CNT composite Ti O₂The preparation method of green deep water treatment agent, including:

(1) by CNT at H₂SO₄And HNO₃Room temperature ultrasonic reaction 30～60min in mixed liquor, washing is to neutrality, room temperature Vacuum drying, obtains carboxylic carbon nano-tube；Then carboxylic carbon nano-tube is distributed in excess diethylenetriamine, adds 2-(7-azo BTA)-N, N, N', N'-tetramethylurea hexafluorophosphoric acid ester, 40～50 DEG C of reactions 5～6h, washing with alcohol, room Temperature vacuum drying, obtains aminated carbon nano tube；Then by aminated carbon nano tube ultrasonic disperse to water and the mixed liquor of acetone In, regulation pH value is 5～6, and ice-water bath dropping 2,4,6-tri-fluoro-5-chloropyrimide, regulation pH value is 6～6.5,20～30 DEG C Ultrasonic reaction 24～48h, washing with alcohol, washing, room temperature in vacuo drying, irradiation obtains response type CNT；

(2) by nano-TiO₂Response type CNT in P25, stabilizer, template and step (1) joins phosphate and delays Rush in liquid, stir 30～60min, form suspension；Wherein, nano-TiO₂P25 and the mass ratio of response type CNT For 1:5～1:20；Wherein, stabilizer is disodiumedetate, tetrasodium ethylenediamine tetraacetate, sodium gluconate, fourth One in alkane tetrabasic carboxylic acid；Template is the mixed of the triblock polyether P123 and triblock copolymer F127 of mass ratio 1:3 Compound；

(3) regulating pH value with alkaline solution is 5～6, is heated to reflux and filters, obtaining CNT composite Ti O₂Green deep water Inorganic agent.

A kind of CNT composite Ti O the most according to claim 1₂The preparation method of green deep water treatment agent, its feature It is: the CNT in described step (1) and H₂SO₄And HNO₃The ratio of mixed liquor is 10～20g:4L；Wherein, H₂SO₄And HNO₃Volume ratio be 1:1～5:1.

A kind of CNT composite Ti O the most according to claim 1₂The preparation method of green deep water treatment agent, its feature It is: the carboxylic carbon nano-tube in described step (1) and 2-(7-azo BTA)-N, N, N', N'-tetramethylurea six The mass ratio of fluorophosphoric acid ester is 5～8:0.1～0.6.

A kind of CNT composite Ti O the most according to claim 1₂The preparation method of green deep water treatment agent, its feature It is: the aminated carbon nano tube in described step (1) is 4～4.5g:1L with the ratio of water and the mixed liquor of acetone；Wherein, The volume ratio of water and acetone is 3:1～5:1.

A kind of CNT composite Ti O the most according to claim 1₂The preparation method of green deep water treatment agent, its feature It is: the aminated carbon nano tube in described step (1) is 4～4.5:4～6 with the mass ratio of 2,4,6-tri-fluoro-5-chloropyrimide.

A kind of CNT composite Ti O the most according to claim 1₂The preparation method of green deep water treatment agent, its feature It is: described step (1) uses sodium carbonate liquor regulation pH value.

A kind of CNT composite Ti O the most according to claim 1₂The preparation method of green deep water treatment agent, its feature It is: the stabilizer concentration in described step (2) is 0.01～0.1mol/L.

A kind of CNT composite Ti O the most according to claim 1₂The preparation method of green deep water treatment agent, its feature It is: the template concentration in described step (2) is 0.01～0.1mol/L.

A kind of CNT composite Ti O the most according to claim 1₂The preparation method of green deep water treatment agent, its feature It is: the phosphate buffer in described step (2) is by concentration 0.025～0.05mol/L sodium dihydrogen phosphate and 0.05～0.1mol/L Disodium hydrogen phosphate forms.

A kind of CNT composite Ti O the most according to claim 1₂The preparation method of green deep water treatment agent, its feature It is: the alkaline solution in described step (3) is concentration 0.5mol/L～the sodium hydroxide of 1.5mol/L or the water of potassium hydroxide Solution.