A kind of covalent organic polymer of triazine ring, electrode material and its preparation method and application
Technical field
The invention belongs to capacitive deionization electrode material fields, and in particular to a kind of covalent organic polymer of triazine ring, electricity
Pole material and its preparation method and application.
Background technique
Membrane capacitance deionization technology is as a kind of emerging water treatment technology, compared to traditional water treatment technology such as reverse osmosis
Thoroughly, electrodialysis, distillation etc., since it is simple, safety, low energy consumption and the advantages such as without secondary pollution cause more and more passes
Note.By impressed DC voltage, charged particle in fluid is made to be adsorbed to the electrode of oppositely charged under the action of electric field force
On material, and electrode surface formed electric double layer, and electrode surface covering anion-cation exchange resin film effectively reduce altogether from
Interference of the son desorption to capacitive deionization desalting technology, improves Electro Sorb efficiency.After reaching adsorption saturation, pass through reversed polarity direct current
Voltage realizes electrode regeneration rapidly and efficiently.The core of capacitive deionization technology is the selection and preparation of electrode material, compares
Traditional carbon-based material, such as active carbon, aeroge, carbon nanotube, graphene are played, the covalent organic polymer of triazine ring has excellent
Different pore structure and good conductivity, there is very big application potential in Electro Sorb field.
Currently, the method and process of the synthesis covalent organic polymer of triazine ring is cumbersome, need in glove box inert gas shielding
Lower mixed raw material, be placed in ampoule bottle vacuumized with high temperature tube sealing, if residual moisture also has ampoule bottle in raw material
The danger burst.This process cost is very high, is unfavorable for production application.
Therefore, a kind of preparation method of simple process is developed to obtain that there is excellent pore structure and good conductivity
The covalent organic polymer of triazine ring have important research significance and application value.
Summary of the invention
It is an object of the invention to overcome, the preparation process of the covalent organic polymer of triazine ring in the prior art is cumbersome, cost
High defect and deficiency provides a kind of preparation method of covalent organic polymer of triazine ring.Preparation method provided by the invention
The covalent organic polymer of triazine ring can successfully be prepared, simple process and low cost is easy to large-scale production, in membrane capacitance
There is very big application space in deionization desalination field.And because the covalent Organic Polymer Chemistry stability of triazine ring is good, in Industry Waste
Equally there is good application potential in the processing disposition of water.The covalent organic polymer of the triazine ring being prepared has excellent
Pore structure and good conductivity, surface wetting properties are good, and circular regeneration effect is good.
Another object of the present invention is to provide the covalent organic polymers of triazine ring that above-mentioned preparation method is prepared.
Another object of the present invention is to a kind of covalent organic polymer films capacitive deionization adsorption electrode materials of triazine ring.
Another object of the present invention is to provide the preparation methods of above-mentioned electrode material.
Another object of the present invention is to provide application of the above-mentioned electrode material in water process.
For achieving the above object, the present invention adopts the following technical scheme:
A kind of preparation method of the covalent organic polymer of triazine ring, includes the following steps:
S1: nitrile monomer and zinc chloride are mixed under infrared light photograph, 40 ~ 80h is reacted under zinc chloride molten condition and obtains black
Solid;The molar ratio of the nitrile monomer and zinc chloride is 1:1 ~ 15;
S2: black solid obtained by S1 is dissolved, filter, is drying to obtain the covalent organic polymer of the triazine ring.
The covalent organic polymer of triazine ring using nitrile monomer as raw material, based on cyano dynamic reversible trimerization cyclisation construct and
At, zinc chloride is not only used as catalyst, but also as solvent, reacts at high temperature a couple of days, nitrile due to Lewis soda acid interact,
Sufficiently reaction forms the covalent organic polymer of triazine ring for a long time.The triazine ring that preparation method provided by the invention obtains covalently has
The functional group modification of machine polymer is controllable, with the fabulous electronics conduction efficiency of pi-conjugated system, inhales in gas absorption, selectivity
There is extremely wide application prospect in the fields such as attached, heterogeneous catalysis;And nitrogen content is high, effectively increases the hydrophily and electricity of material
The electroactive area of pole.
Preferably, the molar ratio of terephthalonitrile described in S1 and zinc chloride is 1:5.
Preferably, the nitrile monomer is terephthalonitrile, 1,3,5- benzene, three nitrile, 4,4 '-biphenyl dintrile or 2,6- pyridine two
One of formonitrile HCN etc..
Preferably, it is reacted at 400 ~ 500 DEG C in S1.
Preferably, the time reacted in S1 is 40h.
Preferably, the black solid is sequentially placed into stir in water, dilute hydrochloric acid solution and tetrahydrofuran in S2 and is impregnated, mistake
Filter.
Preferably, the soaking time is for 24 hours.
Preferably, the dilute hydrochloric acid mass concentration is 5%.
Preferably, dry under vacuum condition in S2.
Preferably, the temperature of the drying is 150 DEG C, and the time is for 24 hours.
The covalent organic polymer of triazine ring that above-mentioned preparation method obtains is claimed in the present invention.
A kind of covalent organic polymer films capacitive deionization adsorption electrode material of triazine ring, including above-mentioned triazine ring covalently have
Machine polymer, conductive agent and binder.
Preferably, the mass ratio of the covalent organic polymer of the triazine ring, conductive agent and binder is 1:0.08 ~ 0.2:
0.08~0.2。
It is further preferable that the mass ratio of the covalent organic polymer of the triazine ring, conductive agent and binder is 1:0.125:
1。
Preferably, the conductive agent is conductive black or acetylene black.
Preferably, the binder is Kynoar, polytetrafluoroethylene (PTFE) or polyvinyl alcohol.
The preparation method of above-mentioned electrode material, including following preparation step: by the covalent organic polymer of triazine ring, conductive agent
It is mixed with binder, dispersion solvent is added, be dispersed with stirring uniformly, be drying to obtain the electrode material.
Preferably, the dispersion solvent is dimethyl acetamide or dimethylformamide.
Preferably, the stirring is magnetic agitation, and the speed of the magnetic agitation is 300 rpm, and the time is for 24 hours.
Preferably, the process of the drying are as follows: coated in titanium net, be dried in vacuo.
Preferably, the titanium net is 3 × 2 cm specifications, 100 mesh twill weave square hole nets.
Preferably, the vacuum drying temperature is 40 DEG C, time 3h.
Preferably, the mass ratio of the dispersion solvent and the covalent organic polymer of the triazine ring is 5 ~ 20ml:1g.
Application of the above-mentioned electrode material in water process is also within the scope of the present invention.
Preferably, the electrode material is preparing the application in membrane capacitance deionization adsorption electrode water treatment facilities.
Electrode material provided by the invention has very big application space in membrane capacitance deionization desalination field.In addition, because of three
The covalent Organic Polymer Chemistry stability of piperazine ring is good, equally has good application potential in the processing disposition of industrial wastewater.
A kind of membrane capacitance deionization adsorption electrode device is also claimed in the present invention, including by above-mentioned electrode material as just
The anode and cathode that pole electrode material and negative electrode material obtain.
Anode and cathode can be obtained using electrode material provided by the invention as positive electrode and negative electrode material, can be applied to
In various types of films capacitive deionization adsorption electrode device in the prior art.
Membrane capacitance deionization adsorption electrode device provided by the invention has high adsorption capacity and power of regeneration etc.;It is logical
It crosses conductivity meter analysis and learns that the absorption ration for the membrane capacitance deionizer equipped out is up to 18.29 mg/g, in 1 M chlorination
Capacitor is 103.07 ~ 129.61 F/g when 1 mV/s of scanning speed in sodium electrolyte, and the electrode passes through multiple circular regeneration still
There is very high adsorption capacity.
Preferably, the surface of the anode and cathode has been covered each by anion-exchange resin membrane and cation exchange resin
Film.
Electrode surface covering anion-cation exchange resin film can effectively reduce coion desorption to capacitive deionization desalination skill
Efficient desalination and rapid regeneration are realized in the interference of art.
Preferably, the membrane capacitance deionization adsorption electrode device further includes the built-in silicagel pad using organic glass as supporting plate
Piece, two panels electrodes face are placed in one, external direct current power supply, which connects peristaltic pump and conductivity meter, the membrane capacitance
It circulates in deionization adsorption electrode device through salt water.
It is further preferable that 5 × 5 cm of length and width of the membrane capacitance deionization adsorption electrode device;The built-in silica gel pad
Area be 3 × 3cm;The pipe that the peristaltic pump is configured is 25#, and flowing velocity is 10 rpm, and sink water is 80mL;Salt water
Concentration is 50 ~ 500 mg/L;It is the V of 0.8 V ~ 1.4 that the anode and cathode, which are just connecing impressed DC voltage,.
Using charged particle in device absorption salt water.It, can be anti-by external DC voltage positive and negative anodes when adsorption saturation
It connects, to realize electrode regeneration.
Preferably, the reversal connection impressed DC voltage is the V of 1.2 V ~ 1.4.
Compared with prior art, the invention has the following beneficial effects:
The preparation method simple process and low cost of the covalent organic polymer of triazine ring provided by the invention, is easy to scale metaplasia
It produces, has very big application space in membrane capacitance deionization desalination field.The covalent organic polymer of the triazine ring being prepared, because of nitrogen
The hetero atom effect and micropore effect of doping have good electro adsorption capacity, have excellent hydrophily, chemical stability, heat
Stability and electronics conduction efficiency, adsorption process generate electric double layer, large capacity adsorb charged particle, electrode surface cover yin-yang from
Sub-exchange resin film effectively reduces coion and interference to capacitive deionization desalting technology is desorbed, and realizes efficient desalination and quickly
Regeneration.
Detailed description of the invention
Fig. 1 is the covalent organic polymer scanning electron microscope (SEM) photograph of triazine ring prepared by embodiment 1;
It is de- that Fig. 2 is that the covalent organic polymer of triazine ring for preparing of embodiment 1 capacitive deionization in about 500 mg/L salting liquids is inhaled
Attached curve graph;
Fig. 3 be embodiment 1 prepare the covalent organic polymer of triazine ring under the scanning speed of 1mV/s cyclic voltammetry curve figure;
It is de- that Fig. 4 is that the covalent organic polymer of triazine ring for preparing of embodiment 1 capacitive deionization in about 500 mg/L salting liquids is inhaled
Attached regeneration curve graph;
It is de- that Fig. 5 is that the covalent organic polymer of triazine ring for preparing of embodiment 2 capacitive deionization in about 200 mg/L salting liquids is inhaled
Attached curve graph.
Fig. 6 is the covalent organic polymer XRD spectra of triazine ring prepared by embodiment 5.
Fig. 7 is fourier infrared linear light spectrogram under the conditions of differential responses in each embodiment.
Specific embodiment
Below with reference to embodiment, the present invention is further explained.These embodiments are merely to illustrate the present invention rather than limitation
The scope of the present invention.Test method without specific conditions in lower example embodiment usually according to this field normal condition or is pressed
The condition suggested according to manufacturer;Used raw material, reagent etc., unless otherwise specified, being can be from the business such as conventional market
The raw materials and reagents that approach obtains.The variation for any unsubstantiality that those skilled in the art is done on the basis of the present invention
And replacement belongs to scope of the present invention.
Embodiment 1
A kind of preparation method of the covalent organic polymer of triazine ring, includes the following steps:
(1) it weighs to 1g terephthalonitrile (7.81mmol) in crucible, weighs 5.32 g zinc chloride under infrared light photograph
(39.03mmol) is mixed with terephthalonitrile, covers crucible cover, is placed in Muffle furnace, and reaction 40 hours is carried out at 500 DEG C.
(2) reaction terminates to be cooled to room temperature, by gained black solid is sequentially placed into deionized water in crucible and dilute hydrochloric acid is molten
Stirring is impregnated 24 hours in liquid and tetrahydrofuran, is dried in vacuo 24 hours i.e. for 150 DEG C of obtained solid powder after separation of solid and liquid
Obtain the covalent organic polymer of triazine ring.
The covalent organic polymer of the triazine ring that the present embodiment obtains can be used as electrode material.The preparation process of the electrode material
It is as follows:
(3) by the covalent organic polymer of triazine ring, conductive black and the Kynoar that are obtained after step (2) processing by 8:1:
1 mixing, is added appropriate dimethyl acetamide as dispersion solvent, magnetic agitation is uniformly dispersed.
(4) the resulting electrode material even application of step (3) is dried in vacuo in titanium net.
Electrode material provided in this embodiment can be used as positive electrode and negative electrode material obtains anode and cathode, be applied to film
In capacitive deionization adsorption electrode device.It can be assembled by the following method and obtain a kind of membrane capacitance deionization adsorption electrode device,
And salting liquid is handled.
(5) by step (4) resulting electrode assembling to making by oneself in capacitor deionizing instrument, using organic glass as built in supporting plate
Hollow silica gel gasket, positive and negative electrode electrode surface are covered each by anion and cation exchange resin film, about 500 mg/L in 80 ml sinks
Salt water enters in capacitor deionizing instrument by peristaltic pump, salt water bottom in and top out, makes salt under the effect of external dc 1.2V voltage
Charged particle is adsorbed in the covalent organic polymer of triazine ring in water, and effluent recycling to crude brine sink, sink is interior to dispose conductivity
The variation of its concentration of instrument real-time monitoring.
(6) when adsorption saturation, external 1.4 V voltage positive and negative anodes of direct current are reversely connected, to realize electrode regeneration.
Fig. 2 is the capacitive deionization adsorption desorption effect picture of made device, as shown in Figure 2, the covalent organic polymer of triazine ring
Absorption ration is 18.29mg/g at 1.2 V.
Fig. 3 is electricity of the prepared covalent organic polymer of triazine ring under 1M sodium chloride electrolysis matter solution three-electrode system
Chemical property figure, the rectangle reflect its good electric double layer performance, and in 1 mV/s, specific capacitance is 103.07 F/g.
Embodiment 2
A kind of preparation method of the covalent organic polymer films of triazine ring, includes the following steps:
(1) 1g terephthalonitrile is weighed in crucible, is weighed 5.32g zinc chloride under infrared light photograph and is mixed with terephthalonitrile, covers
Crucible cover is placed in Muffle furnace, and reaction 60 hours is carried out at 500 DEG C.
(2) reaction terminates to be cooled to room temperature, by gained black solid is sequentially placed into deionized water in crucible and dilute hydrochloric acid is molten
Stirring is impregnated 24 hours in liquid and tetrahydrofuran, is dried in vacuo 24 hours i.e. for 150 DEG C of obtained solid powder after separation of solid and liquid
Obtain the covalent organic polymer of triazine ring.
The covalent organic polymer of the triazine ring that the present embodiment obtains can be used as electrode material.The preparation process of the electrode material
It is as follows:
(3) by the covalent organic polymer of triazine ring, conductive black and the Kynoar that are obtained after step (2) processing by 8:1:
1 mixing, is added appropriate dimethyl acetamide as dispersion solvent, magnetic agitation is uniformly dispersed.
(4) the resulting electrode material even application of step (3) is dried in vacuo in titanium net.
Electrode material provided in this embodiment can be used as positive electrode and negative electrode material obtains anode and cathode, be applied to film
In capacitive deionization adsorption electrode device.It can be assembled by the following method and obtain a kind of membrane capacitance deionization adsorption electrode device,
And salting liquid is handled.
(5) by step (4) resulting electrode assembling to making by oneself in capacitor deionizing instrument, using organic glass as built in supporting plate
Hollow silica gel gasket, positive and negative electrode electrode surface are covered each by anion and cation exchange resin film, about 200 mg/L in 80 ml sinks
Salt water enters in capacitor deionizing instrument by peristaltic pump, salt water bottom in and top out, makes salt under the effect of 1.2 V voltage of external dc
Charged particle is adsorbed in the covalent organic polymer of triazine ring in water, and effluent recycling to crude brine sink, sink is interior to dispose conductivity
The variation of its concentration of instrument real-time monitoring.
(6) when adsorption saturation, external 1.2 V voltage positive and negative anodes of direct current are reversely connected, to realize electrode regeneration.
Capacitive deionization process absorption ration is 11.58 mg/g.
Embodiment 3
A kind of preparation method of the covalent organic polymer films of triazine ring, includes the following steps:
(1) 1g terephthalonitrile is weighed in crucible, is weighed 5.32g zinc chloride under infrared light photograph and is mixed with terephthalonitrile, covers
Crucible cover is placed in Muffle furnace, and reaction 40 hours is carried out at 400 DEG C.
(2) reaction terminates to be cooled to room temperature, by gained black solid is sequentially placed into deionized water in crucible and dilute hydrochloric acid is molten
Stirring is impregnated 24 hours in liquid and tetrahydrofuran, is dried in vacuo 24 hours i.e. for 150 DEG C of obtained solid powder after separation of solid and liquid
Obtain the covalent organic polymer of triazine ring.
The covalent organic polymer of the triazine ring that the present embodiment obtains can be used as electrode material.The preparation process of the electrode material
It is as follows:
(3) by the covalent organic polymer of triazine ring, conductive black and the Kynoar that are obtained after step (2) processing by 8:1:
1 mixing, is added appropriate dimethyl acetamide as dispersion solvent, magnetic agitation is uniformly dispersed.
(4) the resulting electrode material even application of step (3) is dried in vacuo in titanium net.
Electrode material provided in this embodiment can be used as positive electrode and negative electrode material obtains anode and cathode, be applied to film
In capacitive deionization adsorption electrode device.It can be assembled by the following method and obtain a kind of membrane capacitance deionization adsorption electrode device,
And salting liquid is handled.
(5) by step (4) resulting electrode assembling to making by oneself in capacitor deionizing instrument, using organic glass as built in supporting plate
Hollow silica gel gasket, positive and negative electrode electrode surface are covered each by anion and cation exchange resin film, about 500 mg/L in 80 ml sinks
Salt water enters in capacitor deionizing instrument by peristaltic pump, salt water bottom in and top out, makes salt under the effect of 1.2 V voltage of external dc
Charged particle is adsorbed in the covalent organic polymer of triazine ring in water, and effluent recycling to crude brine sink, sink is interior to dispose conductivity
The variation of its concentration of instrument real-time monitoring.
(6) when adsorption saturation, external 1.2 V voltage positive and negative anodes of direct current are reversely connected, to realize electrode regeneration.
Capacitive deionization process reached adsorption saturation at 20 minutes, and absorption ration is 8.5 mg/g.
Embodiment 4
A kind of preparation method of the covalent organic polymer of triazine ring, select 1g(5.12mmol) 1,3,5- benzene three nitrile replace embodiment
Terephthalonitrile and zinc chloride and 1 in 1,3,5- benzene, three nitrile reaction time be 80h outside, remaining condition with embodiment 1 one
It causes, obtains a kind of covalent organic polymer of triazine ring.
In addition, can be according to the method or item in embodiment 1 according to the covalent organic polymer of triazine ring provided in this embodiment
Part obtains electrode material and membrane capacitance deionization adsorption electrode device, and molten to salt using membrane capacitance deionization adsorption electrode device
Liquid is handled.
Embodiment 5
A kind of preparation method of the covalent organic polymer of triazine ring, except selecting 1.06g(7.81mmol) in addition to zinc chloride, remaining condition
It is consistent with embodiment, obtain a kind of covalent organic polymer of triazine ring (such as Fig. 5).
In addition, can be according to the method or item in embodiment 1 according to the covalent organic polymer of triazine ring provided in this embodiment
Part obtains electrode material and membrane capacitance deionization adsorption electrode device, and molten to salt using membrane capacitance deionization adsorption electrode device
Liquid is handled.
Embodiment 6
A kind of preparation method of the covalent organic polymer of triazine ring, except selecting 15.90g(117.15mmol) in addition to zinc chloride, remaining
Condition is consistent with embodiment, obtains a kind of covalent organic polymer of triazine ring.
In addition, can be according to the method or item in embodiment 1 according to the covalent organic polymer of triazine ring provided in this embodiment
Part obtains electrode material and membrane capacitance deionization adsorption electrode device, and molten to salt using membrane capacitance deionization adsorption electrode device
Liquid is handled.
Comparative example 1
A kind of preparation method of the covalent organic polymer films of triazine ring, includes the following steps:
(1) it weighs to 1g benzene dinitrile in crucible, weighs 5.32 g zinc chloride under infrared light photograph and mixed with terephthalonitrile, covered
Crucible cover is placed in Muffle furnace, and reaction 20 hours is carried out at 400 DEG C.
(2) reaction terminates to be cooled to room temperature, by gained black solid is sequentially placed into deionized water in crucible and dilute hydrochloric acid is molten
Stirring is impregnated 24 hours in liquid and tetrahydrofuran, is dried in vacuo 24 hours i.e. for 150 DEG C of obtained solid powder after separation of solid and liquid
Obtain the covalent organic polymer of triazine ring.
The covalent organic polymer of the triazine ring that this reference examples obtains can be used as electrode material.The preparation process of the electrode material
It is as follows:
(3) by the covalent organic polymer of triazine ring, conductive black and the Kynoar that are obtained after step (2) processing by 8:1:
1 mixing, is added appropriate dimethyl acetamide as dispersion solvent, is uniformly dispersed within magnetic agitation 24 hours.
(4) the resulting electrode material even application of step (3) is dried in vacuo in titanium net.
The electrode material that this reference examples provides can be used as positive electrode and negative electrode material obtains anode and cathode, be applied to film
In capacitive deionization adsorption electrode device.It can be assembled by the following method and obtain a kind of membrane capacitance deionization adsorption electrode device,
And salting liquid is handled.
(5) by step (4) resulting electrode assembling to making by oneself in capacitor deionizing instrument, using organic glass as built in supporting plate
Hollow silica gel gasket, positive and negative electrode electrode surface are covered each by anion and cation exchange resin film, about 500 mg/L in 80 ml sinks
Salt water enters in capacitor deionizing instrument by peristaltic pump, salt water bottom in and top out, makes salt under the effect of 1.2 V voltage of external dc
Charged particle is adsorbed in the covalent organic polymer of triazine ring in water, and effluent recycling to crude brine sink, sink is interior to dispose conductivity
The variation of its concentration of instrument real-time monitoring.
(6) when adsorption saturation, external 1.4 V voltage positive and negative anodes of direct current are reversely connected, to realize electrode regeneration.
Capacitive deionization process has been rapidly achieved adsorption saturation in 20 minutes, and absorption ration is 4.40 mg/g.1
Its specific capacitance is 111.82 F/g under the scanning speed of mV/s.