CN107935018A - A kind of preparation method of the two-dimentional transition metal nano flake of structure memory - Google Patents

A kind of preparation method of the two-dimentional transition metal nano flake of structure memory Download PDF

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CN107935018A
CN107935018A CN201711258662.9A CN201711258662A CN107935018A CN 107935018 A CN107935018 A CN 107935018A CN 201711258662 A CN201711258662 A CN 201711258662A CN 107935018 A CN107935018 A CN 107935018A
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transition metal
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CN107935018B (en
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于岩
郭思怡
庄赞勇
何亚军
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Fuzhou University
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G3/00—Compounds of copper
    • C01G3/006—Compounds containing, besides copper, two or more other elements, with the exception of oxygen or hydrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/002—Mixed oxides other than spinels, e.g. perovskite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/72—Copper
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/01—Particle morphology depicted by an image
    • C01P2004/03—Particle morphology depicted by an image obtained by SEM
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/34—Organic compounds containing oxygen
    • C02F2101/345—Phenols

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  • Engineering & Computer Science (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
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Abstract

The invention belongs to material science and field of environment engineering, a kind of preparation method of the two-dimentional transition metal nano flake of structure memory is disclosed.Presoma is used as by the calcined product LDO for the magnalium laminar double-metal hydroxide for preparing coprecipitation, adsorbs the copper ion in water, then calcine the two-dimensional nano sheeting to form the dispersed cupric oxide with memory effect.Structure memory two dimension transition metal nano-flake material produced by the present invention is used for the heterogeneous system activation efficient degrading phenol organic pollution of persulfate, poisonous metal stripping quantity is low, it is of low cost, it is environmentally protective, a kind of easy, efficient method is provided for the processing of phenolic comp ' ds pollution, with good economic efficiency and environmental benefit, can carry out large-scale production and application.

Description

A kind of preparation method of the two-dimentional transition metal nano flake of structure memory
Technical field
The invention belongs to material science and field of environment engineering, and in particular to a kind of two-dimentional transition metal of structure memory is received Rice preparation of sections method.
Background technology
Phenolic comp ' ds pollution is one of important pollutant of industrialized production, since its stable structure, difficult degradation, toxicity are big, Become the toxic pollutant of priority acccess control.Over the years, many researchers are using biodegradable, activated carbon adsorption and air catalytic The methods of oxidation, degrading phenol pollutant, but most methods are only applicable to discharge capacity is few, concentration is low processing, and processing time Length, narrow application range, it is with high costs, cannot be degradable, and the defects of easily bring secondary pollution, limit its development.
Nowadays, it is organic using transition metal oxide such as cobalt oxide, copper oxide nano material activation persulfate degraded The correlation technique rapid rising of pollutant.In addition, the two-dimensional sheet structure stablized is usually helpful to catalyst, its laminate Bimetallic oxide（LDO）Gradually it is subject to researchers as a kind of environmentally friendly hydrotalcite-like materials with memory effect Favor.Research shows, due to the adjustable metal ingredient of LDO class materials, the structure of stratiform, larger specific surface area and laminate The cation of middle high degree of dispersion, the strong absorption property based on memory effect and basic site and extensive catalytic performance, are used Make flake matrix material to preventing copper oxide catalyst digestion of metallic ion, keeping its stable structure and good circulating effect very It is potential.At present, have researcher by hydro-thermal method, high-temperature calcination, load the methods of synthesize aschistic copper oxide material come Degrading phenol organic matter, but these synthetic methods are typically more complicated, such as template P123 is used, or high-temperature calcination forerunner Body, it usually needs the copper source of high concentration, is easily introduced the secondary pollution of organic reagent, increases digestion of metallic ion amount, and material sheet Body recycling performance is poor, this does not just meet the economy of Modern times call and environmental protection, is unfavorable for promoting its application.Therefore, into one The preparation method that step explores other cupric oxide functional materials has great importance.
The content of the invention
It is an object of the invention to for insufficient existing for existing sheet transition metal oxide material preparation method, there is provided A kind of green synthesis method of the two-dimentional transition metal nano flake of structure memory and its application.Structure note produced by the present invention Recall two-dimentional transition metal nano-flake material and be used for heterogeneous system degrading phenol pollutant, poisonous metal stripping quantity is low, and cost is low It is honest and clean, it is environmentally protective, phenolic comp ' ds pollution can be efficiently removed, a kind of easy, efficient method is provided for the processing of phenolic comp ' ds pollution, With good economic efficiency and environmental benefit, can carry out large-scale production and application.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of preparation method of the two-dimentional transition metal nano flake of structure memory：By magnesium salts, aluminium salt is dissolved completely in deionization Water, is added dropwise ammonium hydroxide and adjusts pH=9 ~ 10, stir evenly, and has memory effect through what centrifuge washing, freeze-drying, calcining obtained Magnalium laminar bimetallic oxide（LDO）For calcining to obtain structure memory two dimension transition metal again after uniform adsorption copper ion Nano flake.
Specifically, the preparation method of the structure memory two dimension transition metal nano-flake material, comprises the following steps：
（1）Magnesium, aluminium salt are dissolved in deionized water solution, stirs to solid be completely dissolved at room temperature, it is dense to be configured to magnesium aluminium ion Degree is than the solion for 2 ~ 3（The ratio between amount of magnesium ion and aluminium ion material is 2 ~ 3:1）；The magnesium salts and aluminium salt are chlorination Salt or nitrate；
（2）By step（1）Obtained solion is together instilled in a beaker with ammonium hydroxide, and mixed solution pH is adjusted by ammonium hydroxide =9 ~ 10, stir evenly rear still aging 2 ~ 6 h；
（3）By step（2）Solution after ageing removes supernatant, centrifuges, washing, and the evening of freeze-drying one waves completely to moisture Hair, obtains white solid magnalium laminar double-metal hydroxide（LDH presomas）；
（4）By step（3）Dried LDH presomas are placed in Muffle furnace, are calcined in air atmosphere；Control heating rate 1 ~ 10 ℃·min-1, 450 ~ 600 DEG C of calcining heat, 2 ~ 3 h of soaking time, LDH presomas are aoxidized in atmosphere, remove interlayer Water and part interlayer ion, obtain the magnalium laminar bimetallic oxide with memory effect（LDO）；
（5）Prepare the copper ion solution that copper ion concentration is 1 ~ 600 mg/L（Copper source is copper chloride, copper nitrate or copper sulphate）, will Step（4）Obtained LDO presomas are added in copper ion solution and adsorbed, and are vigorously stirred 2 ~ 24 h；
（6）Will（5）Middle solution is calcined to obtain the two dimension for the structure memory for being named as c-CuLDO through centrifuge washing, drying, Muffle furnace Transition metal nano-flake material；During calcining, heating rate is 1 ~ 10 DEG C of min-1, 450 ~ 600 DEG C of calcining heat, during insulation Between 2 ~ 3 h.
According to above-mentioned technical proposal, the preferred compound concentration of the solion is 105 mmol/L of magnesium ion, aluminium ion 35 mmol/L of concentration；In reaction process, preferable digestion time is 3 h；In drying process, preferable drying condition is freezing It is dry；In calcination process, preferable calcining heat is 450 DEG C, and preferably calcination time is 3 h；In adsorption process, preferably stir Time is 5 h.
The two-dimentional transition metal nano-flake material of the structure memory prepared according to above-mentioned technical proposal, it is dirty applied to phenols The processing of thing is contaminated, shows good removal effect.
Have particular application as：Pending phenolic comp ' ds pollution solution ph is adjusted to 9 ~ 12, by the two of 5 ~ 20 mg structure memories Dimension transition metal nano flake is put into phenolic comp ' ds pollution solution, and the initial concentration of the phenolic comp ' ds pollution solution is 1 ~ 15 mg/L；Then 15 ~ 30 mg potassium peroxydisulfates are added and start reaction, are vigorously stirred, 20 ~ 60min of reaction completes Pyrogentisinic Acid's pollutant Degraded.
The round-robin method of material is：By the solid after suitable hydro-thermal reaction processing degraded, available for efficient drop again Solve phenol pollutant；The hydro-thermal reaction uses the water heating kettle of polytetrafluoroethylliner liner, and 5 ~ 20 mg solids are dispersed in 50 In mL deionized waters, 100 mL water heating kettles are transferred to；The hydro-thermal time is 1 h, and hydrothermal temperature is 120 DEG C.
The present invention makees matrix using LDO materials, under conditions of any organic reagent is not added, by adsorbing and calcining knot The method of conjunction prepares the LDO two dimension memory effect nanometer sheets material containing cupric oxide and is used to activate the pollution of persulfate degrading phenol The heterogeneous system of thing.The shortcomings that preparing flaky material the present invention overcomes traditional masterplate method, uses low concentration copper source, pollution-free base Body, prepares high efficiency, low stripping quantity, recyclable phenolic comp ' ds pollution degradation catalyst.Main former material involved by the application Material and used equipment are simple and easily operated, of low cost, and the obtained material environment of shape containing cupric oxide plate is friendly, can be effective Degradation water in phenol pollutant, economic benefit and obvious environment benefit have good application value.
The remarkable advantage of the present invention is：
（1）Preparation method is environmentally protective：Houghite LDH as a kind of material for being easy for workers to synthesis approximate natural minerals again, The copper ion in solution can be efficiently utilized, realizes copper ion being uniformly distributed on two-dimensional slice；Closed with other by template Slabbing metal oxide is small compared to environmental pollution, is a kind of preparation method of eco-friendly, obtained structure memory Two-dimentional transition metal nano flake has larger specific surface area, and the processing to phenolic comp ' ds pollution shows significant effect, and Can recycle, technological operation is simple, cost is low, it is efficient, be conducive to scale green production；
（2）Material structure is stablized：Using the memory effect of LDO itself, be conducive to keep the two-dimensional slice of material micro- in application process Structure is seen, promotes degradation process, and two-dimensional sheet structure will not be destroyed in degradation process, be conducive to recycling for material；
（3）Degradation efficiency is fast：Copper magnesium aluminum oxide nanometer sheet material activation potassium peroxydisulfate generation potentiometric titrations speed is fast, makes Degradation efficiency is obtained to greatly improve, and applicable pH wider range；
（4）Low harmful ion dissolution：In degradation process, under the same terms, with pure zirconia copper product copper ion stripping quantity（0.34 mg/L）Compare, the stripping quantity of material copper ion of the present invention is low（0.4 μ g/L of ＜）.
Brief description of the drawings
Fig. 1 is the XRD diagram of the two-dimentional transition metal nano flake of structure memory made from the embodiment of the present invention 1；Wherein, a）LDH presomas；b）LDO presomas；c）c-CuLDO；
Fig. 2 is the SEM figures of LDO presomas made from the embodiment of the present invention 1；
Fig. 3 is the curve that LDO presomas absorption copper ion made from the embodiment of the present invention 1 changes over time；
Fig. 4 is the SEM figures of the two-dimentional transition metal nano flake of structure memory made from the embodiment of the present invention 1；
Fig. 5 is the song that two-dimentional transition metal nano flake Pyrogentisinic Acid's pollutants removal rate of structure memory of the present invention changes over time Line；
Fig. 6 is the influence schematic diagram that pH value of the present invention removes structure memory two dimension transition metal nano flake phenol efficiency；
Fig. 7 is the recycling design sketch that phenol is removed for structure memory two dimension transition metal nano flake of the present invention.
Embodiment
With reference to the accompanying drawings and embodiments, the object, technical solution and advantage of the application are further illustrated, makes the application Become apparent from understanding.It should be appreciated that specific embodiment described herein is not used to limit this hair only to explain the present invention It is bright.
Embodiment 1
The preparation of c-CuLDO structure memory two dimension transition metal nano flakes：
（1）The Aluminium chloride hexahydrate of the Magnesium dichloride hexahydrate of 2.13 g and 0.845 g is dissolved in the deionized water of 100 mL, room Lower stirring to the solid of temperature is completely dissolved, and magnesium aluminium ion solution is made；
（2）Above-mentioned solution is poured into the separatory funnel of 100 mL, be added drop-wise in beaker, while pH during ammonium hydroxide is adjusted is added dropwise =9 ~ 10, it is added dropwise, adjusts final pH=9.5, and continues stirring 10 minutes；
（3）Supernatant is removed after solution left standstill room temperature after stirring is aged 3 h, is centrifuged, and be washed with deionized 3 times Obtain LDH presomas；
（4）LDH presomas are freeze-dried 12 h until moisture volatilizees completely；
（5）Dried LDH presomas are placed in Muffle furnace, are calcined in air atmosphere；Control 2 DEG C of min of heating rate-1, 450 DEG C of calcining heat, 3 h of soaking time, obtains LDO；
（6）5 h, washed, freeze-drying, at 450 DEG C will be stirred in 60 mg/L copper chloride solutions of the LDO inputs containing 50 mL It is lower calcining 3 it is small when（Control 2 DEG C of min of heating rate-1）, obtain required c-CuLDO materials.
According to embodiment 1, the front and rear and final c-CuLDO of LDO presomas calcining is used into X-ray diffraction analysis thing phase respectively, Its X-ray diffraction is as shown in Figure 1.Analysis determines that the LDH things before calcining are mutually Mg6Al2(OH)18·4.5H2O, the LDO after calcining Thing is mutually MgO, and the thing of final product c-CuLDO is mutually MgO.Illustrate no obvious impurities phase, cupric oxide should be evenly distributed. The adsorption equilibrium curve of absorbing copper is as shown in Figure 3.The scanning electron microscope of LDO and c-CuLDO is as shown in Figure 2 and Figure 4.From figure In as can be seen that before and after the product supported copper, remain the laminated structure of presoma, piece has been grown up, and structure is more open.
Application examples 1
The c-CuLDO nanometer sheets material of the gained of embodiment 1 is used to remove phenol pollutant, is comprised the following steps that：
（1）Prepare 10 mgL-1Phenol solution, with NaOH adjust pH value of solution=11；
（2）The c-CuLDO nanometer sheet materials of preparation are put into above-mentioned phenol solution, the c-CuLDO concentration for controlling input is 0.3 g·L-1, then it is 0.5 gL to control input potassium peroxydisulfate concentration-1, it is vigorously stirred；
（3）By the different periods, phenol degrading situation is measured with high performance liquid chromatography, calculates the removal rate of phenol.
Application examples 2
The c-CuLDO nanometer sheets material of the gained of embodiment 1 is used to remove phenol pollutant under different pH value：
（1）Prepare 10 mgL-1Phenol solution, it is respectively 4,5.6 to adjust solution ph with HCl or NaOH（Without adjusting Section）, 7,9 and 11；
（2）The c-CuLDO nanometer sheet materials of preparation are put into above-mentioned phenol solution, the c-CuLDO concentration for controlling input is 0.3 g·L-1, then it is 0.5 gL to control input potassium peroxydisulfate concentration-1, it is vigorously stirred；
（3）By the different periods, phenol degrading situation is measured with high performance liquid chromatography, calculates the removal rate of phenol.
Material reusability is investigated
（1）Prepare 10 mgL-1Phenol solution, with NaOH adjust pH value of solution=11；
（2）The c-CuLDO nanometer sheet materials of preparation are put into above-mentioned phenol solution, the c-CuLDO concentration for controlling input is 0.3 g·L-1, then it is 0.5 gL to control input potassium peroxydisulfate concentration-1, it is vigorously stirred；
（3）By the different periods, phenol degrading situation is measured with high performance liquid chromatography, calculates the removal rate of phenol.
（4）After the completion of degraded, sample is centrifuged, is washed and is put into the 100 mL autoclaves containing 50 mL water, is put In 120 DEG C of baking oven, 2 h are kept the temperature；
（5）Solution furnace cooling after reaction, centrifuges, and deionized water is washed 3 times, and 60 DEG C of solids being dried to obtain can be again It is secondary to be used for efficient degradation of phenol.
Fig. 7 is that the c-CuLDO nanometer sheets material of embodiment 1 repeats profit as the catalyst of activation persulfate degradation of phenol Use design sketch.As seen from the figure, there is the weakening of performance in second of degraded in the sample of non-hydrothermal treatment, but by hydro-thermal After reason, degradation effect and speed can return to level when using for the first time substantially.The c-CuLDO Nano sheet materials of this explanation present invention Material can keep the excellent reusing of material by the round-robin method of hydro-thermal.
According to application examples 1, phenol removal rate curve as shown in Figure 5 is obtained.As can be seen from Figure 5, with the extension of time, c- CuLDO nanometer sheet materials make phenol concentration constantly reduce.After 20 min, c-CuLDO nanometer sheet material Pyrogentisinic Acid's pollutants Removal rate reach 99 %, tend to balance after 40 min, inductivity coupled plasma mass spectrometry（ICP-MS）Measure copper ion dissolution Amount is less than 0.4 μ g/L；However, for the pure CuO powder of purchase, metal dissolving amount reaches 0.34 mg/L after degraded, about c- 1000 times of CuLDO dissolutions.It is prepared by the c-CuLDO nanometer sheets material and pure CuO powder that the contrast present invention is prepared, the present invention The removal capacity of obtained c-CuLDO nanometer sheet material Pyrogentisinic Acid's pollutants is equivalent to pure CuO powder, but metal dissolving amount pole Low, copper ion concentration is relatively low used in preparation, and recycling property is good, and preparation method is simple, more economic, environmental protection.
According to application examples 2, phenol removal rate curve as shown in Figure 6 is obtained.As can be seen from Figure 6, with the extension of time, c- CuLDO nanometer sheet materials make phenol concentration constantly reduce.Illustrating c-CuLDO nanometer sheets material can degrade benzene under wider pH value Phenol, and in alkaline conditions（PH=9 and 11）Phenol can be removed completely in 40 min, and it is fast to degrade under mild acid conditions Though rate has reduction, removal rate can still reach more than 90%.Therefore, the c-CuLDO nanometer sheet materials that prepared by the present invention have preferably Stability, under the conditions of most of pH keep activity, be conducive to be widely applied.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with Modification, should all belong to the covering scope of the present invention.

Claims (10)

  1. A kind of 1. preparation method of the two-dimentional transition metal nano flake of structure memory, it is characterised in that：Comprise the following steps：
    （1）Weigh magnesium salts and aluminium salt is completely dissolved in deionized water, form solution A；
    （2）By step（1）Obtained solution A is added drop-wise in beaker jointly with ammonium hydroxide, controls solution in beaker under fast stirring Alkalescence is always maintained at, is stirred, forms suspension B；
    （3）By step（2）The suspension B stirred evenly, after still aging, through centrifuging, washing and dry, obtains white solid Magnalium laminar double-metal hydroxide；
    （4）By step（3）The magnalium laminar double-metal hydroxide being dried to obtain is placed in Muffle furnace, is forged in air atmosphere Burn, control heating rate, calcining heat and soaking time, obtain the magnalium laminar bimetallic oxide with memory effect；
    （5）By step（4）In the magnalium laminar bimetallic oxide with memory effect as presoma, put into copper ion In solution, stirring, through the nano flake for centrifuging, washing and dry acquisition cupric transition metal；
    （6）By step（5）In the nano flake of cupric transition metal be placed in Muffle furnace, calcine, control in air atmosphere Good heating rate, calcining heat and soaking time, form the two-dimentional transition metal nano flake of structure memory.
  2. 2. a kind of preparation method of the two-dimentional transition metal nano flake of structure memory according to claim 1, its feature It is：Step（1）The magnesium salts and aluminium salt are chlorate or nitrate；The ratio between amount of magnesium ion and aluminium ion material is 2 ~ 3: 1。
  3. 3. a kind of preparation method of the two-dimentional transition metal nano flake of structure memory according to claim 1, its feature It is：Step（2）The pH that the ammonium hydroxide is used to adjust solution B is in the range of 9 ~ 10.
  4. 4. a kind of preparation method of the two-dimentional transition metal nano flake of structure memory according to claim 1, its feature It is：Step（3）The still aging time is 2 ~ 6 h, and cleaning solvent is deionized water, and drying condition is freeze-drying.
  5. 5. a kind of preparation method of the two-dimentional transition metal nano flake of structure memory according to claim 1, its feature It is：Step（4）During middle calcining, heating rate is 1 ~ 10 DEG C of min-1, 450 ~ 600 DEG C of calcining heat, soaking time 2 ~ 3 h。
  6. 6. a kind of preparation method of the two-dimentional transition metal nano flake of structure memory according to claim 1, its feature It is：Step（5）In using copper source be copper chloride, copper nitrate or copper sulphate, copper ion concentration is 1 ~ 600 mg/L, stirring Time is 2 ~ 24 h, and drying condition is freeze-drying.
  7. 7. a kind of preparation method of the two-dimentional transition metal nano flake of structure memory according to claim 1, its feature It is：Step（6）During middle calcining, heating rate is 1 ~ 10 DEG C of min-1, 450 ~ 600 DEG C of calcining heat, soaking time 2 ~ 3 h。
  8. A kind of 8. two-dimentional transition metal nanometer thin of the structure memory as made from claim 1-7 any one of them preparation methods The application of piece, it is characterised in that：The two-dimentional transition metal nano flake of the structure memory is used to activate persulfate degraded phenol Pollutant.
  9. 9. application according to claim 8, it is characterised in that：The application specifically includes following steps：Will be pending Phenolic comp ' ds pollution solution ph is adjusted to 9 ~ 12, and the two-dimentional transition metal nano flake of 5 ~ 20 mg structure memories is put into phenols In pollutant solution, the initial concentration of the phenolic comp ' ds pollution solution is 1 ~ 15 mg/L；Then 15 ~ 30 mg potassium peroxydisulfates are added Start reaction, be vigorously stirred, 20 ~ 60min of reaction completes the degraded of Pyrogentisinic Acid's pollutant；By the solid for washing, centrifuging recycling Obtained again through hydro-thermal reaction for second of two-dimentional transition metal nano-flake material degraded.
  10. 10. application according to claim 9, it is characterised in that：The hydro-thermal reaction is using polytetrafluoroethylliner liner Water heating kettle, 5 ~ 20 mg solids are dispersed in 50 mL deionized waters, transfer to 100 mL water heating kettles；The hydro-thermal time For 1 h, hydrothermal temperature is 120 DEG C.
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CN115121250A (en) * 2022-06-13 2022-09-30 中国地质大学（武汉） Self-buffering system Co @ MOOH/M x O y Preparation method and application of nano composite material

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