CN107954465A - Monoethanolamine auxiliary under ZnO preparation method and its in water remove divalence heavy metal（Cu, Pb, Ni）Application - Google Patents
Monoethanolamine auxiliary under ZnO preparation method and its in water remove divalence heavy metal（Cu, Pb, Ni）Application Download PDFInfo
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- CN107954465A CN107954465A CN201711348576.7A CN201711348576A CN107954465A CN 107954465 A CN107954465 A CN 107954465A CN 201711348576 A CN201711348576 A CN 201711348576A CN 107954465 A CN107954465 A CN 107954465A
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Abstract
The present invention relates to the preparation method of the ZnO of different structure, more particularly under monoethanolamine auxiliary, the ZnO of different structure is set to remove the preparation method of divalence heavy metal in water.Belong to material preparation and separation technology field.Refer in particular to directly prepare the ZnO products with different structure and pattern to add monoethanolamine by simple hydrothermal solution or solvent-thermal method, and for the adsorption recovery to divalence heavy metal (Cu, Pb, Ni).It has studied the absorption property of this material by adsorption experiment.The result shows that the ZnO of the different structure obtained using the present invention has superior absorption property.
Description
Technical field
The present invention relates to the preparation method of ZnO, more particularly under monoethanolamine auxiliary, ZnO is set to remove divalence in water
The preparation method of heavy metal (Cu, Pb, Ni).Belong to material preparation and separation technology field.
Background technology
Mankind's activity has introduced the heavy metal of numerous species to environment in many aspects, particularly Cu (II), Cr
(VI), Cd (II), Pb (II) and As (III), such as the burning of fossil fuel, melting ore, industrial wastewater, refuse landfill, ground
Under poisonous water process, mining etc..These pollutants are easily dispersed in environment, are tended to accumulate in organism, to life
State system causes various adverse effects.
Since the pollution of heavy metal receives very big concern, its recovery technique also has very much.Routine techniques generally includes
Applied Physics or chemical process go removing heavy metals, including chemical precipitation from aqueous solution, and reverse osmosis membrane filtration, ion exchange, inhales
It is attached, chelating and electrochemical techniques.
ZnO is as one of most common metal oxide, in photochemical catalyst, gas sensor, light emitting diode, solar-electricity
Pond, UV sensor, field-effect transistor etc. are lived and are widely used in industrial.It is well known that ZnO has respectively
Kind structure and pattern, such as flower-shaped, tubulose, spherical, needle-shaped, nanometer rods, nano wire, whisker, nanobelt etc., these are to ZnO products
Performance influence it is very big.Nevertheless, ZnO is also a kind of up-and-coming ecological restoration material, there are many functions on its surface
Group, such as hydroxyl, this to absorption heavy metal be it is essential, can be used as adsorb active site.Since adsorption process occurs
Influence of the ZnO structures to heavy metals removal effect is therefore studied in material surface to be of great significance.
The content of the invention
The present invention is to add monoethanolamine by simple hydrothermal solution or solvent-thermal method and directly prepare to have different structure and pattern
ZnO products, and for the adsorption recovery of divalence heavy metal (Cu, Pb, Ni).
The technical scheme is that：
The preparation method of the flower-shaped ZnO of one kind absorption divalence heavy metal (Cu, Pb, Ni), carries out according to the following steps：
(1) a certain amount of acetic acid dihydrate zinc (Zn (OAc) is taken2·2H2O), it is distributed at room temperature in deionized water, ultrasound
Processing forms it into homogeneous solution；
(2) and then into solution made of step (1) monoethanolamine (EA) is added, continues stirring 5-10 minutes；
(3) a certain amount of sodium hydroxide (NaOH) is taken to be dissolved in deionized water.Sodium hydroxide solution and step (2) are made
Solution vigorous magnetic stirring under mix, add polyethylene glycol 400, stirring 10-15 minutes after, mixture is transferred to
In the stainless steel autoclave of Teflon linings；
(4) by autoclave seal and at 110-120 DEG C keep 8 it is small when.System is cooled to room temperature, it is heavy to filter white
Form sediment, be washed with deionized 3 times, and in 50-60 DEG C of baking oven it is dry 12 it is small when.
Wherein, (the Zn (OAc) of the acetic acid dihydrate zinc described in step (1)2·2H2O) with the sodium hydroxide mole of step (3)
Than for 1:When 2, manufactured ZnO presents flower-shaped；
Wherein as the acetic acid dihydrate zinc (Zn (OAc) described in step (1)2·2H2O) with the sodium hydroxide mole of step (3)
Than for 1:When 8, manufactured ZnO presents bar-shaped；
Wherein as the acetic acid dihydrate zinc (Zn (OAc) described in step (1)2·2H2O) rub with the sodium hydroxide of step (3)
You are than being 1:2 and when changing solvent into absolute ethyl alcohol, manufactured ZnO presents spherical.
The amount that monoethanolamine (EA) wherein described in step (2) is added in acetic acid zinc solution is 4.0-5.7mL.
Polyethylene glycol 400 addition wherein described in step (3) is 1.6-2.3mL.
Polyethylene glycol 400 described in above-mentioned technical proposal, it is as surfactant.
Above-mentioned ZnO is applied to absorption divalence heavy metal (Cu, Pb, Ni), and specific method carries out as steps described below：
(1) by Cu (NO3)2·3H2O, Ni (NO3)2·6H2O and Pb (NO3)2It is dissolved in respectively in deionized water, obtains difference
The solution of concentration.Then 50 milliliters are stirred with 100 revs/min of rotating speed in air bath of the temperature control at 25 DEG C and contains 50 milligrams
When solion 24 in 100 milliliters of conical flasks of adsorbent is small, to establish adsorption equilibrium.To avoid the decomposition of ZnO and other
The appearance of valence state, therefore, by the way that NaOH (0.1M) or HNO is added dropwise3(0.1M) solution by the initial pH value of all solution adjust to
5.The concentration of metal ion in aqueous solution is monitored with atomic absorption spectrography (AAS) (AA240Agilent Technologies).Pass through
Adsorption dynamics adsorption kinetics is carried out with the metal concentration of given time interval measurement solution in adsorption process, and by varying weight
The initial concentration of metal ion obtains adsorption isotherm.
Above-mentioned steps (1) show that flower-shaped ZnO removes Cu in balance2+、Ni2+、Pb2+Amount be respectively 19.0,0.6,
18.5mg/g, the theoretical of pseudo- second-order model remove Cu2+、Ni2+、Pb2+Amount be respectively 19.1,0.6,17.8mg/g；
Above-mentioned steps (1) show that bar-shaped ZnO removes Cu in balance2+、Ni2+、Pb2+Amount be respectively 16.4,1.9,
19.0mg/g, the theoretical of pseudo- second-order model remove Cu2+、Ni2+、Pb2+Amount be respectively 16.5,1.8,18.1mg/g；
Above-mentioned steps (1) show that spherical ZnO removes Cu in balance2+、Ni2+、Pb2+Amount be respectively 17.9,3.6,
18.7mg/g, the theoretical of pseudo- second-order model remove Cu2+、Ni2+、Pb2+Amount be respectively 17.8,3.4,17.8mg/g；
Being better than pseudo- first order modeling using the related coefficient of the linear graph of pseudo- second-order model, (its value is equal>0.9), and it is theoretical and
Test QeValue shows fabulous uniformity.Therefore, ZnO adsorbs second-order reaction rather than the single order that heavy metal is dynamics Controlling
Process.
Above-mentioned steps (1) draw flower-shaped ZnO for Cu2+The saturated extent of adsorption of absorption is 29.7mg/g, flower-shaped ZnO for
Ni2+The sub-optimal fusion algorithm of absorption is 0.08mg/g, and flower-shaped ZnO is for Pb2+The saturated extent of adsorption of absorption is 170mg/g；
Above-mentioned steps (1) draw bar-shaped ZnO for Cu2+The saturated extent of adsorption of absorption is 42.4mg/g, bar-shaped ZnO for
Ni2+The sub-optimal fusion algorithm of absorption is 0.092mg/g, and bar-shaped ZnO is for Pb2+The saturated extent of adsorption of absorption is 180mg/g；
Above-mentioned steps (1) draw spherical ZnO for Cu2+The saturated extent of adsorption of absorption is 54.3mg/g, spherical ZnO for
Ni2+The sub-optimal fusion algorithm of absorption is 0.098mg/g, and spherical ZnO is for Pb2+The saturated extent of adsorption of absorption is 164mg/g；
ZnO of different shapes is Pb (II) to the adsorbance order of heavy metal ion>Cu(II)>Ni(II).
The technological merit of the present invention：
(1) ZnO with different structure is directly prepared using different solvents by simple hydrothermal method, addition monoethanolamine
Product.
(2) active site by the use of functional groups such as the hydroxyls on ZnO surfaces as absorption adsorbs heavy metal ion.
Brief description of the drawings
The flower-shaped ZnO (a) of Fig. 1, bar-shaped ZnO (b), the FESEM images of spherical ZnO (c)
The flower-shaped ZnO (a) of Fig. 2, bar-shaped ZnO (b), the XRD spectrum of spherical ZnO (c)
The flower-shaped ZnO (a) of Fig. 3, spherical ZnO (b), fourier-transform infrared (FTIR) spectrum of bar-shaped ZnO (c)
Embodiment
With reference to specific implementation example, the present invention will be further described.
(1) specific implementation instance analysis is carried out according to appended claims in claims (1)：
Embodiment 1：Take 0.7g (3.2mmol) acetic acid dihydrates zinc (Zn (OAc)2·2H2O), 30mL is distributed at room temperature
In deionized water, supersound process forms it into homogeneous solution；Then 4.0mL monoethanolamines (EA) are added into acetic acid zinc solution, after
Continuous stirring 5 minutes；The sodium hydroxide (NaOH) of 0.256g (6.4mmol) is taken to be dissolved in 30mL deionized waters.By above-mentioned two body
The lower mixing of vigorous magnetic stirring is tied up to, adds 1.6mL polyethylene glycol 400s, mixture after ten minutes, is transferred to Teflon by stirring
In the stainless steel autoclave of lining；By autoclave seal and at 110 DEG C keep 8 it is small when.It is cooled to room temperature system, filtering is white
Color precipitates, and is washed with deionized 3 times, and in 50-60 DEG C of baking oven it is dry 12 it is small when.
Embodiment 2：Take 0.878g (4mmol) acetic acid dihydrates zinc (Zn (OAc)2·2H2O), 30mL is distributed at room temperature
In deionized water, supersound process forms it into homogeneous solution；Then 5.0mL monoethanolamines (EA) are added into acetic acid zinc solution, after
Continuous stirring 5 minutes；The sodium hydroxide (NaOH) of 0.32g (8mmol) is taken to be dissolved in 30mL deionized waters.Above-mentioned two system is existed
The lower mixing of vigorous magnetic stirring, adds 2mL polyethylene glycol 400s, mixture after ten minutes, is transferred to Teflon linings by stirring
In stainless steel autoclave；By autoclave seal and at 120 DEG C keep 8 it is small when.System is cooled to room temperature, it is heavy to filter white
Form sediment, be washed with deionized 3 times, and in 50-60 DEG C of baking oven it is dry 12 it is small when.
Embodiment 3：Take 1.0g (4.5mmol) acetic acid dihydrates zinc (Zn (OAc)2·2H2O), 30mL is distributed at room temperature
In deionized water, supersound process forms it into homogeneous solution；Then 5.7mL monoethanolamines (EA) are added into acetic acid zinc solution, after
Continuous stirring 5 minutes；The sodium hydroxide (NaOH) of 0.36g (9mmol) is taken to be dissolved in 30mL deionized waters.Above-mentioned two system is existed
The lower mixing of vigorous magnetic stirring, adds 2.3mL polyethylene glycol 400s, mixture after ten minutes, is transferred to Teflon linings by stirring
Stainless steel autoclave in；By autoclave seal and at 120 DEG C keep 8 it is small when.System is cooled to room temperature, it is heavy to filter white
Form sediment, be washed with deionized 3 times, and in 50-60 DEG C of baking oven it is dry 12 it is small when.
(2) specific implementation instance analysis is carried out according to appended claims in claims (2)：
Embodiment 4：Take 0.7g (3.2mmol) acetic acid dihydrates zinc (Zn (OAc)2·2H2O), 30mL is distributed at room temperature
In deionized water, supersound process forms it into homogeneous solution；Then 4.0mL monoethanolamines (EA) are added into acetic acid zinc solution, after
Continuous stirring 5 minutes；The sodium hydroxide (NaOH) of 1.02g (25.6mmol) is taken to be dissolved in 30mL deionized waters.By above-mentioned two body
The lower mixing of vigorous magnetic stirring is tied up to, adds 1.6mL polyethylene glycol 400s, mixture after ten minutes, is transferred to Teflon by stirring
In the stainless steel autoclave of lining；By autoclave seal and at 110 DEG C keep 8 it is small when.It is cooled to room temperature system, filtering is white
Color precipitates, and is washed with deionized 3 times, and in 50-60 DEG C of baking oven it is dry 12 it is small when.
Embodiment 5：Take 0.878g (4mmol) acetic acid dihydrates zinc (Zn (OAc)2·2H2O), 30mL is distributed at room temperature
In deionized water, supersound process forms it into homogeneous solution；Then 5.0mL monoethanolamines (EA) are added into acetic acid zinc solution, after
Continuous stirring 5 minutes；The sodium hydroxide (NaOH) of 1.28g (32mmol) is taken to be dissolved in 30mL deionized waters.By above-mentioned two system
Mixed under vigorous magnetic stirring, add 2mL polyethylene glycol 400s, mixture after ten minutes, is transferred to Teflon linings by stirring
Stainless steel autoclave in；By autoclave seal and at 120 DEG C keep 8 it is small when.System is cooled to room temperature, it is heavy to filter white
Form sediment, be washed with deionized 3 times, and in 50-60 DEG C of baking oven it is dry 12 it is small when.
Embodiment 6：Take 1.0g (4.5mmol) acetic acid dihydrates zinc (Zn (OAc)2·2H2O), 30mL is distributed at room temperature
In deionized water, supersound process forms it into homogeneous solution；Then 5.7mL monoethanolamines (EA) are added into acetic acid zinc solution, after
Continuous stirring 5 minutes；The sodium hydroxide (NaOH) of 1.44g (36mmol) is taken to be dissolved in 30mL deionized waters.By above-mentioned two system
Mixed under vigorous magnetic stirring, add 2.3mL polyethylene glycol 400s, stirring is transferred to Teflon linings after ten minutes, by mixture
In stainless steel autoclave in；By autoclave seal and at 120 DEG C keep 8 it is small when.It is cooled to room temperature system, filtering white
Precipitation, is washed with deionized 3 times, and in 50-60 DEG C of baking oven it is dry 12 it is small when.
(3) specific implementation instance analysis is carried out according to appended claims in claims (3)：
Embodiment 7：Take 0.7g (3.2mmol) acetic acid dihydrates zinc (Zn (OAc)2·2H2O), 30mL is distributed at room temperature
In absolute ethyl alcohol, supersound process forms it into homogeneous solution；Then 4.0mL monoethanolamines (EA) are added into acetic acid zinc solution, after
Continuous stirring 5 minutes；The sodium hydroxide (NaOH) of 0.256g (6.4mmol) is taken to be dissolved in 30mL absolute ethyl alcohols.By above-mentioned two body
The lower mixing of vigorous magnetic stirring is tied up to, adds 1.6mL polyethylene glycol 400s, mixture after ten minutes, is transferred to Teflon by stirring
In the stainless steel autoclave of lining；By autoclave seal and at 110 DEG C keep 8 it is small when.It is cooled to room temperature system, filtering is white
Color precipitate, wash 3 times with absolute ethyl alcohol, and in 50-60 DEG C of baking oven dry 12 it is small when.
Embodiment 8：Take 0.878g (4mmol) acetic acid dihydrates zinc (Zn (OAc)2·2H2O), 30mL is distributed at room temperature
In absolute ethyl alcohol, supersound process forms it into homogeneous solution；Then 5.0mL monoethanolamines (EA) are added into acetic acid zinc solution, after
Continuous stirring 5 minutes；The sodium hydroxide (NaOH) of 0.32g (8mmol) is taken to be dissolved in 30mL absolute ethyl alcohols.Above-mentioned two system is existed
The lower mixing of vigorous magnetic stirring, adds 2mL polyethylene glycol 400s, mixture after ten minutes, is transferred to Teflon linings by stirring
In stainless steel autoclave；By autoclave seal and at 120 DEG C keep 8 it is small when.System is cooled to room temperature, it is heavy to filter white
Form sediment, wash 3 times with absolute ethyl alcohol, and in 50-60 DEG C of baking oven dry 12 it is small when.
Embodiment 9：Take 1.0g (4.5mmol) acetic acid dihydrates zinc (Zn (OAc)2·2H2O), 30mL is distributed at room temperature
In absolute ethyl alcohol, supersound process forms it into homogeneous solution；Then 5.7mL monoethanolamines (EA) are added into acetic acid zinc solution, after
Continuous stirring 5 minutes；The sodium hydroxide (NaOH) of 0.36g (9mmol) is taken to be dissolved in 30mL absolute ethyl alcohols.Above-mentioned two system is existed
The lower mixing of vigorous magnetic stirring, adds 2.3mL polyethylene glycol 400s, mixture after ten minutes, is transferred to Teflon linings by stirring
Stainless steel autoclave in；By autoclave seal and at 120 DEG C keep 8 it is small when.System is cooled to room temperature, it is heavy to filter white
Form sediment, wash 3 times with absolute ethyl alcohol, and in 50-60 DEG C of baking oven dry 12 it is small when.
As shown in Figure 1, Zn2+/ NaOH molar ratios are 1：2, deionized water water is in finally flower-shaped as solvent, its diameter is about
5μm.It is the pin of flower-like structure in figure, the diameter of these pins is tapered into along the direction of growth, forms the gold with sharp tip
Word tower structure, and diameter changes to the about 60nm at tip from the 300nm of bottom.Work as Zn2+/ NaOH molar ratios are 1：8
When, structure is proved to be bar-shaped, and most of product is acicular.The length of bar-shaped ZnO products is about 6 μm, and diameter is about 1 μ
M, length are about 3 μm, and maximum gauge is 1 μm, and the minimum value of needle-shaped ZnO is about 150nm.Zn2+/ NaOH molar ratios are maintained at 1：2
And had been converted into the form of ZnO of the absolute ethyl alcohol prepared by solvent spherical.The polarity of solvent not only influences the knot of product
Structure, but also the Size Distribution of significant impact particle.The diameter range of these spheres fully belongs between 250nm to 600nm
Nanoscale.In addition, the surface of ZnO there are many rough surfaces, more activated adoption sites can be provided, improves and inhales
Attached activity.
As shown in Figure 2, the XRD diffracting spectrums of the ZnO of different-shape.It will be clear that all diffraction maximums of ZnO all may be used
To belong to six side ZnO (JCPDS card number 36-1451).2 θ values are 31.8,34.4,36.2,47.5,56.6,62.8,66.4,
67.9 and 69.1 ° of peak can be respectively directed to (100) of six side ZnO, (002), (101), (102), (110), (103),
(200), (112) and (201) crystal face.However, Zn (OH) is not observed2Peak, it is pure to show obtained ZnO.This is
Due to Zn (OH) under the high-temperature and high-pressure conditions during hydro-thermal or solvent thermal reaction2Complete decomposition.
From the figure 3, it may be seen that the FTIR spectrum of the ZnO with different structure.In 2940cm-1And 2860cm-1Neighbouring two are strong
Adsorption peak can belong to the stretching vibration of methylene.1396cm-1, 1250cm-1, 1059cm-1Neighbouring adsorption peak belongs to respectively
In OH-OH deformation vibrations, some functional groups are incorporated into ZnO products by methylene deformation vibration and CN stretching vibrations, EA,
But without the crystal form for changing ZnO.
On the basis of experimental result, the formation mechenism of various ZnO structures is as follows.Since monoethanolamine is alkaline, when it
When adding in acetic acid zinc solution, solution becomes muddy immediately, and white precipitate should be Zn (OH)2.However, due to EA be it is unnecessary,
[Zn (EA) is formed according to reaction 22]2+, precipitation fades away after five minutes for stirring, it has good solubility in water.
Zn2++2OH-→Zn(OH)2 (1)
Zn(OH)2+2EA→[Zn(EA)2]2++2OH- (2)
When precursor solution is heated, reaction occurs as follows：
[Zn(EA)2]2+→Zn2++2EA (3)
Zn2++2OH-→Zn(OH)2 (4)
Zn(OH)2→ZnO+H2O (5)
ZnO+H2O+2OH-→[Zn(OH)4]2- (6)
Under high-temperature and high-pressure conditions, [Zn (EA)2]2+Generation Zn (OH) can be reacted with free OH- by being decomposed into2Zn2+From
Son.Eventually through Zn (OH)2The growth for decomposing the ZnO nucleus produced obtains ZnO products.
Work as Zn2+/ NaOH molar ratios are 1：When 2, due to OH-Deficiency, ethanolamine molecules than hydroxyl ion adsorb in ZnO cores
Surface is more competitive, may eventually lead to the formation of flower-like structure.
Work as Zn2+/ NaOH molar ratios are 1:When 8, enough OH-Ion causes a degree of ZnO to dissolve and produces [Zn
(OH)4]2-(reaction 6).[the Zn (OH) of negative electrical charge4]2-Complex is preferably adsorbed on the surface of ZnO cores, this contributes to ZnO cores
Grown along [0001] direction, crystal is presented bar-shaped.Although [Zn (OH)4]2-Influence occupy an leading position, but EA is to different knots
The formation of the ZnO of structure still has a great impact.
Work as Zn2+/ NaOH molar ratios are 1：When 2, the weak polar solvents such as ethanol are selected to influence the life of ZnO with the help of EA
Length direction and growth rate, ultimately form spherical ZnO.
Compared with the ZnO of no addition EA prepares reaction process, it is found that EA can not only influence the form of ZnO products, and
And the dispersiveness of particle can be improved as validity surfactant.Therefore, we can conclude that：EA is certain
Can be as excellent structure directing agent and excellent surfactant.
Addition EA can be seen that by experimental result above, control Zn2+/ NaOH molar ratios and selection are different molten
Agent, successfully controls the structure of ZnO, this and monoethanolamine and [Zn (OH)4]2-With ZnO cores competitive Adsorption and the polarity of solvent for use
It is related.Due to the utilization of EA in reaction process, the surface of ZnO is loaded by some functional groups, improves absorption to a certain extent
Ability.ZnO is second order reaction to the control of the adsorption dynamics adsorption kinetics of heavy metal, Cu2+,Ni2+,Pb2+Equilibrium adsorption data correspond to respectively
Langmuir, Freundlich and Langmuir thermoisopleth.In addition, the adsorption capacity order of various ZnO is followed successively by：Pb(II)>
Cu(II)>Ni (II), this is contributed for being anchored on energy required on ZnO surfaces.In addition, these discoveries contribute to exploitation to have
There is the heavy metal ion in floriform appearance and the ZnO of structure removal waste water.
Claims (4)
1. the preparation method of the ZnO for adsorbing divalence heavy metal (Cu, Pb, Ni), it is characterised in that carry out according to the following steps：
(1) a certain amount of acetic acid dihydrate zinc (Zn (OAc) is taken2·2H2O), it is distributed in deionized water, is ultrasonically treated at room temperature
Form it into homogeneous solution；
(2) and then into solution made of step (1) monoethanolamine (EA) is added, continues stirring 5-10 minutes；
(3) a certain amount of sodium hydroxide (NaOH) is taken to be dissolved in deionized water.Will be molten made of sodium hydroxide solution and step (2)
Liquid mixes under vigorous magnetic stirring, adds polyethylene glycol 400, and after stirring 10-15 minutes, mixture is transferred to Teflon linings
In stainless steel autoclave in；
(4) by autoclave seal and at 110-120 DEG C keep 8 it is small when.System is cooled to room temperature, filters white precipitate, is used
Deionized water is washed 3 times, and in 50-60 DEG C of baking oven it is dry 12 it is small when.
2. the preparation method of the ZnO according to claim 1 for being used to adsorb divalence heavy metal (Cu, Pb, Ni), its feature exist
In：
(1) as the acetic acid dihydrate zinc (Zn (OAc) described in step (1)2·2H2O) the sodium hydroxide molar ratio with step (3) is
1:When 2, manufactured ZnO presents flower-shaped；
(2) as the acetic acid dihydrate zinc (Zn (OAc) described in step (1)2·2H2O) the sodium hydroxide molar ratio with step (3) is
1:When 8, manufactured ZnO presents bar-shaped；
(3) as the acetic acid dihydrate zinc (Zn (OAc) described in step (1)2·2H2O) with the molar ratio of the sodium hydroxide of step (3)
For 1:2 and when changing solvent into absolute ethyl alcohol, manufactured ZnO presents spherical.
3. the preparation method of the ZnO according to claim 1 for being used to adsorb divalence heavy metal (Cu, Pb, Ni), its feature exist
In the amount that the monoethanolamine (EA) described in step (2) is added in acetic acid zinc solution is 4.0-5.7mL.
4. the preparation method of the ZnO according to claim 1 for being used to adsorb divalence heavy metal (Cu, Pb, Ni), its feature exist
In the polyethylene glycol 400 addition described in step (3) is 1.6-2.3mL.
Priority Applications (1)
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| CN112221350A (en) * | 2020-09-25 | 2021-01-15 | 浙江工业大学 | Preparation method of novel nanofiltration membrane based on zinc hydroxide nanowires |
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| XINJUAN WANG ET AL.: "Controllable ZnO Architectures by Ethanolamine-Assisted Hydrothermal Reaction for Enhanced Photocatalytic Activity", 《J. PHYS. CHEM. C》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112221350A (en) * | 2020-09-25 | 2021-01-15 | 浙江工业大学 | Preparation method of novel nanofiltration membrane based on zinc hydroxide nanowires |
| CN112221350B (en) * | 2020-09-25 | 2022-04-19 | 浙江工业大学 | Preparation method of novel nanofiltration membrane based on zinc hydroxide nanowires |
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