CN108295904A - A kind of cu ferrite/Cellulose nanocrystal catalyst and preparation method thereof - Google Patents

A kind of cu ferrite/Cellulose nanocrystal catalyst and preparation method thereof Download PDF

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CN108295904A
CN108295904A CN201810108346.1A CN201810108346A CN108295904A CN 108295904 A CN108295904 A CN 108295904A CN 201810108346 A CN201810108346 A CN 201810108346A CN 108295904 A CN108295904 A CN 108295904A
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cellulose nanocrystal
ferrite
catalyst
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张素风
赵东艳
侯晨
李豪
梁辰
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Shaanxi University of Science and Technology
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    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
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    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
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Abstract

Cu ferrite/Cellulose nanocrystal catalyst of dispersibility improvement and catalytic performance raising is made in a kind of cu ferrite/Cellulose nanocrystal catalyst of present invention offer and preparation method thereof, the fabricated in situ cu ferrite in Cellulose nanocrystal.Preparation method includes the following steps, step 1, Cellulose nanocrystal, Hydrated copper chloride, iron chloride hexahydrate, alkali source and surfactant are dissolved in organic solvent, mixed solution is obtained after being uniformly dispersed;Step 2, mixed solution is subjected to solvent thermal reaction, separates solid after the completion of reaction, washed, it is dry, obtain cu ferrite/Cellulose nanocrystal catalyst.

Description

A kind of cu ferrite/Cellulose nanocrystal catalyst and preparation method thereof
Technical field
The invention belongs to catalysis material technical fields, and in particular to a kind of cu ferrite/Cellulose nanocrystal catalyst and Preparation method.
Background technology
With the continuous development of industry and farming and animal husbandry, printing and dyeing, petrochemical industry, nitropheneol object caused by medicine and other fields Matter steps into environment and is formed novel pollution, and since it is with certain bio-toxicity, paranitrophenol is by U.S.'s ring It protects administration and Environmental Protection in China department is classified as " priority pollutants ", paranitrophenol has certain cumulative bad and holds in the environment Long property will cause environment long-term harm, and the long-term exposure because of paranitrophenol in the environment, may lead to soil, earth's surface Water, underground water are by different degrees of pollution.
Cu ferrite (CuFe2O4) have the characteristics that high conductivity, thermal stability and catalytic activity, in electronics, senses and urge It is widely used in change, is the catalyst for paranitrophenol of degrading generally used.However, due to ferromagnetism and intermolecular The effect of dipolar forces so that the problem of easily reuniting, bad dispersibility occurs in cu ferrite, to limit its catalytic performance.For solution Certainly this problem, a kind of method are that cu ferrite is supported on carrier.But the cu ferrite dispersibility loaded at present is still It is poor.
Invention content
It is an object of the invention to overcome current cu ferrite bad dispersibility, what catalytic performance needed to be further increased asks Topic provides a kind of cu ferrite/Cellulose nanocrystal catalyst and preparation method thereof, in Cellulose nanocrystal (CNC, NCC) Cu ferrite/Cellulose nanocrystal (CuFe that dispersibility improves and catalytic performance improves is made in fabricated in situ cu ferrite2O4/ CNC) catalyst.
In order to achieve the above object, the present invention adopts the following technical scheme that:
A kind of preparation method of cu ferrite/Cellulose nanocrystal catalyst, includes the following steps,
Step 1, Cellulose nanocrystal, Hydrated copper chloride, iron chloride hexahydrate, alkali source and surfactant are dissolved in organic In solvent, mixed solution is obtained after being uniformly dispersed;
Step 2, mixed solution is subjected to solvent thermal reaction, separates solid after the completion of reaction, washed, it is dry, it obtains To cu ferrite/Cellulose nanocrystal catalyst.
Preferably, in step 1, the length of Cellulose nanocrystal is 150~250nm, a diameter of 10~20nm.
Preferably, in step 1, Cellulose nanocrystal, the ratio of Hydrated copper chloride and iron chloride hexahydrate in mixed solution For:(0.06~0.2) g:0.1mmol:0.2mmol.
Preferably, in step 1, alkali source is one or more of sodium acetate, sodium hydroxide, ammonium hydroxide, urea and sodium carbonate.
Preferably, in step 1, surfactant is one or both of polyethylene glycol and polyvinylpyrrolidone.
Preferably, in step 1, organic solvent is ethylene glycol.
Preferably, in step 1, alkali source is sodium acetate, and surfactant is polyethylene glycol, cellulose nanometer in mixed solution Crystalline substance, Hydrated copper chloride, iron chloride hexahydrate, the ratio of sodium acetate and polyethylene glycol are:(0.06~0.2) g:0.1mmol: 0.2mmol:(1~2) g:(0.25~0.75) g.
Preferably, step 1 is specially:First Cellulose nanocrystal is dissolved in organic solvent, ultrasonic disperse and mechanical agitation, Cellulose nanocrystal solution is obtained, then Hydrated copper chloride, iron chloride hexahydrate, alkali source, table are added into Cellulose nanocrystal solution After face activating agent and organic solvent, ultrasonic disperse and mechanical agitation, mixed solution is obtained.
Preferably, in step 2, reaction temperature is 190~210 DEG C, and the reaction time is 9~11h.
It is a kind of to utilize cu ferrite/Cellulose nanocrystal catalyst made from preparation method as described above.
Compared with prior art, the present invention has technique effect beneficial below:
The present invention prepares cu ferrite/Cellulose nanocrystal catalyst using solvent-thermal method, former in Cellulose nanocrystal Position synthesis cu ferrite, to which cu ferrite is compound with Cellulose nanocrystal.Cellulose nanocrystal not only has cellulose Basic structure and performance, and the characteristic with nano particle, such as the features such as high length-diameter ratio, high-specific surface area and high-crystallinity, And abundant hydroxyl is contained on surface, be conducive to metal cation its surface fabricated in situ, thus be it is a kind of it is excellent it is nontoxic, can It regenerates, the ferritic biological carrier materials of supported copper of degradable, high mechanical properties and good biocompatibility.Cu ferrite is born It after being loaded in Cellulose nanocrystal, is dispersed on the surface of Cellulose nanocrystal, is not easy to reunite, dispersibility improves, to improve The catalytic performance of catalyst.Simultaneously as Cellulose nanocrystal has suction-operated to paranitrophenol, catalysis can further improve The performance of agent catalytic degradation paranitrophenol.
Further, the present invention by control different Cellulose nanocrystals dosage, prepare different degrees of scatter and The cu ferrite catalyst of catalytic performance, to realize the controllable preparation of catalyst.
Cu ferrite produced by the present invention/Cellulose nanocrystal catalyst, Kinetics Rate Constants By Using reach 0.19s-1, single Fine copper ferrite Kinetics Rate Constants By Using is 0.11s-1, the cu ferrite obtained/more simple copper and iron of Cellulose nanocrystal catalyst Oxysome catalyst improves 36~73%.
Description of the drawings
Fig. 1 is the SEM figures of cu ferrite/Cellulose nanocrystal catalyst prepared by embodiment 1.
Fig. 2 is the XRD diagram of cu ferrite/Cellulose nanocrystal catalyst prepared by embodiment 1.
Fig. 3 is the FT-IR figures of cu ferrite/Cellulose nanocrystal catalyst prepared by embodiment 1.
Specific implementation mode
The present invention is described in further details with reference to embodiment.
The preparation method of cu ferrite of the present invention/Cellulose nanocrystal catalyst, specifically includes following steps:
Step 1, first a certain amount of Cellulose nanocrystal is added in organic solvent, ultrasound and 25~35min of mechanical agitation, Obtain Cellulose nanocrystal solution;150~250nm of length of Cellulose nanocrystal, 10~20nm of diameter;
Step 2, a certain amount of Hydrated copper chloride solid, hydration trichlorine are added into the Cellulose nanocrystal solution in step 1 Change iron solid, alkali source, surfactant and organic solvent, ultrasonic disperse and 25~35min of mechanical agitation, obtains solution B;It is organic Solvent is ethylene glycol (EG);Alkali source is one or more of sodium acetate (NaAc), sodium hydroxide, ammonium hydroxide, urea and sodium carbonate; Surfactant is one or both of polyethylene glycol (PEG) and polyvinylpyrrolidone.Cellulose nanocrystal, chloride hydrate The ratio of copper and iron chloride hexahydrate is:(0.06~0.2) g:0.1mmol:0.2mmol.
Step 3, solution B is sealed to using polytetrafluoroethylene (PTFE) as in the autoclave of liner, in 190~210 DEG C of horse 8~11h is not reacted in stove.
Step 4, black solid is detached by permanent magnet from mixture, uses deionized water and absolute ethyl alcohol each respectively Wash black solid 3~5 times, after dry 8~10h at ambient temperature, obtain cu ferrite/Cellulose nanocrystal catalyst.
In step 2, when alkali source is sodium acetate, surfactant is polyethylene glycol, Cellulose nanocrystal, water in solution B Closing copper chloride, iron chloride hexahydrate, sodium acetate and polyethylene glycol ratio is:(0.06~0.2) g:0.1mmol:0.2mmol:(1 ~2) g:(0.25~0.75) g:(20~100) mL.
Wherein, Hydrated copper chloride uses Copper dichloride dihydrate (CuCl2·2H2O), iron chloride hexahydrate is using seven hydrations three Iron chloride (FeCl3·7H2O)。
Specific embodiment is as follows.
Embodiment 1
The Cellulose nanocrystal of 0.1g is weighed in 40mL ethylene glycol, forms the cellulose nanometer that mass concentration is 0.23% Brilliant solution, ultrasonic disperse and mechanical agitation 25min;Weigh 0.17g Copper dichloride dihydrates solid, seven iron chloride hexahydrates of 0.54g Solid, 1.5g sodium acetates solid, 0.5g polyethylene glycol solid and 20mL ethylene glycol are added in Cellulose nanocrystal solution, ultrasound Disperse simultaneously mechanical agitation 25min;Solution after mixing is sealed to using polytetrafluoroethylene (PTFE) as in the autoclave of liner, 11h is reacted in 200 DEG C of Muffle furnace;Black solid is detached from mixture by permanent magnet, uses deionized water respectively Black solid is respectively washed with absolute ethyl alcohol 3 times, after at ambient temperature dry 8h received to get to a kind of cu ferrite/cellulose The brilliant catalyst of rice.
Embodiment 2
The Cellulose nanocrystal of 0.3g is weighed in 40mL ethylene glycol, forms the cellulose nanometer that mass concentration is 0.68% Brilliant solution, ultrasonic disperse and mechanical agitation 35min;Weigh 0.43g Copper dichloride dihydrates solid, seven iron chloride hexahydrates of 1.35g Solid, 2.5g sodium acetates solid, 1.0g polyethylene glycol solid and 20mL ethylene glycol are added in Cellulose nanocrystal solution, ultrasound Disperse simultaneously mechanical agitation 35min;Solution after mixing is sealed to using polytetrafluoroethylene (PTFE) as in the autoclave of liner, 11h is reacted in 200 DEG C of Muffle furnace;Black solid is detached from mixture by permanent magnet, uses deionized water respectively Black solid is respectively washed with absolute ethyl alcohol 3 times, after dry 10h at ambient temperature to get to cu ferrite/Cellulose nanocrystal Catalyst.
Embodiment 3
The Cellulose nanocrystal for weighing 0.2g is dissolved in 40mL ethylene glycol, forms Cellulose nanocrystal solution, ultrasonic disperse And mechanical agitation 30min;Weigh 0.17g Copper dichloride dihydrates solid, seven iron chloride hexahydrate solids of 0.54g, 1.6g sodium acetates Solid, 0.75g polyethylene glycol solid and 20mL ethylene glycol are added in Cellulose nanocrystal solution, ultrasonic disperse and mechanical agitation 35min;Solution after mixing is sealed to using polytetrafluoroethylene (PTFE) as in the autoclave of liner, in 190 DEG C of Muffle 8h is reacted in stove;Black solid is detached from mixture by permanent magnet, is respectively washed with deionized water and absolute ethyl alcohol respectively Wash black solid 4 times, after dry 9h at ambient temperature to get to cu ferrite/Cellulose nanocrystal catalyst.
Embodiment 4
The Cellulose nanocrystal for weighing 0.12g is dissolved in 40mL ethylene glycol, forms Cellulose nanocrystal solution, ultrasonic disperse And mechanical agitation 30min;Weigh 0.17g Copper dichloride dihydrates solid, seven iron chloride hexahydrate solids of 0.54g, 1.5g urea, 0.6g polyvinylpyrrolidones and 20mL ethylene glycol are added in Cellulose nanocrystal solution, ultrasonic disperse and mechanical agitation 30min;Solution after mixing is sealed to using polytetrafluoroethylene (PTFE) as in the autoclave of liner, in 210 DEG C of Muffle 10h is reacted in stove;Black solid is detached from mixture by permanent magnet, is respectively washed with deionized water and absolute ethyl alcohol respectively Wash black solid 5 times, after dry 10h at ambient temperature to get to cu ferrite/Cellulose nanocrystal catalyst.
Embodiment 5
The Cellulose nanocrystal for weighing 0.13g is dissolved in 40mL ethylene glycol, forms Cellulose nanocrystal solution, ultrasonic disperse And mechanical agitation 30min;Weigh 0.17g Copper dichloride dihydrates solid, seven iron chloride hexahydrate solids of 0.54g, 1.3g hydroxides Sodium, 0.4g polyethylene glycol solid and 20mL ethylene glycol are added in Cellulose nanocrystal solution, ultrasonic disperse and mechanical agitation 25min;Solution after mixing is sealed to using polytetrafluoroethylene (PTFE) as in the autoclave of liner, in 200 DEG C of Muffle 9h is reacted in stove;Black solid is detached from mixture by permanent magnet, is respectively washed with deionized water and absolute ethyl alcohol respectively Wash black solid 5 times, after dry 9h at ambient temperature to get to cu ferrite/Cellulose nanocrystal catalyst.
Embodiment 6
The Cellulose nanocrystal for weighing 0.15g is dissolved in 40mL ethylene glycol, forms Cellulose nanocrystal solution, ultrasonic disperse And mechanical agitation 35min;Weigh 0.17g Copper dichloride dihydrates solid, seven iron chloride hexahydrate solids of 0.54g, 2g sodium carbonate, 0.75g polyethylene glycol solid and 20mL ethylene glycol are added in Cellulose nanocrystal solution, ultrasonic disperse and mechanical agitation 35min; Solution after mixing is sealed to using polytetrafluoroethylene (PTFE) as in the autoclave of liner, it is anti-in 200 DEG C of Muffle furnace Answer 10h;Black solid is detached from mixture by permanent magnet, respectively washs black with deionized water and absolute ethyl alcohol respectively Solid 5 times, after dry 10h at ambient temperature to get to a kind of cu ferrite/Cellulose nanocrystal catalyst.
Embodiment 7
The Cellulose nanocrystal of 0.1g is weighed in 40mL ethylene glycol, forms the cellulose nanometer that mass concentration is 0.23% Brilliant solution, ultrasonic disperse and mechanical agitation 30min;Weigh 0.28g Copper dichloride dihydrates solid, seven iron chloride hexahydrates of 0.90g Solid, 3.2g sodium acetates solid, 0.4g polyethylene glycol solid and 20mL ethylene glycol are added in Cellulose nanocrystal solution, ultrasound Disperse simultaneously mechanical agitation 30min;Solution after mixing is sealed to using polytetrafluoroethylene (PTFE) as in the autoclave of liner, 11h is reacted in 210 DEG C of Muffle furnace;Black solid is detached from mixture by permanent magnet, uses deionized water respectively Black solid is respectively washed with absolute ethyl alcohol 5 times, after at ambient temperature dry 10h received to get to a kind of cu ferrite/cellulose The brilliant catalyst of rice.
Embodiment 8
Using the Cellulose nanocrystal of 0.2g, other conditions are same as Example 7.
Embodiment 9
Using the Cellulose nanocrystal of 0.3g, other conditions are same as Example 7.
Comparative example 1
Cellulose nanocrystal is not added, directly carries out solvent hot preparation in a kettle, other conditions are the same as embodiment 7.
As shown in Figure 1, the SEM figures of the cu ferrite/Cellulose nanocrystal catalyst obtained for embodiment 1, it can be seen that CuFe2O4Cu ferrite grain size very little in/CNC composite materials, about 10nm, uniform particle sizes are more uniform to be distributed in CNC nets In shape structure.The present invention builds different rulers by regulating and controlling Cellulose nanocrystal, the proportioning of cu ferrite and solvent heat preparation process Very little and pattern catalyst.
As shown in Fig. 2, the XRD diagram of the cu ferrite/Cellulose nanocrystal catalyst obtained for embodiment 1, it can be seen that CuFe2O4/ CNC composite materials are at 2 θ=18.5 °, 30.2 °, 35.6 °, 43.2 °, 53.6 °, 57.1 °, 62.8 ° and 74.5 ° Single spinel structure CuFe in diffraction maximum, with standard card (JCPDS77-0010)2O4Crystal face is consistent, corresponding crystal face Respectively (111), (220), (311), (400), (422), (511), (440) and (533).Meanwhile the spy at 2 θ=22.5 ° (002) crystal face that peak corresponds to CNC is levied, and the peak that the diffraction maximum at 50.4 ° is copper simple substance, because using solvent second in preparation Glycol, due to its excess, part Cu2+It is reduced into Cu simple substance.Therefore, composite material is successfully prepared, and the addition of CNC does not cause CuFe2O4The variation of nanoparticle structure.
As shown in figure 3, the FT-IR figures of the cu ferrite/Cellulose nanocrystal catalyst obtained for embodiment 1, can see Go out in Fig. 3 (a) is CuFe2O4、CuFe2O4The infrared spectrogram of/CNC.Known by curve (a), CuFe2O4588cm in curve-1It is The Cu-O keys and Fe-O key absorption peaks of cu ferrite, 3437cm-1It is the absorption peak of O-H on the surface coated PEG of cu ferrite, table The generation of spinel type ferrite is illustrated.Known by curve (b), 1624cm-1, 2929cm-1And 3437cm-1It corresponds on CNC respectively The stretching vibration of C-O keys, methylene (- CH2) in c h bond stretching vibration absworption peak and O-H keys flexural vibrations peak, 1112cm-1And 1165cm-1The stretching vibration of the C-O stretching vibrations and C-C skeletons that correspond respectively to cellulosic molecule inner ether is inhaled It receives, 1058cm-1Corresponding to the C-O stretching vibrations of cellulose alcohol.In addition, CuFe2O4Characteristic absorption peak in CuFe2O4On/CNC Exist, further demonstrates CuFe2O4Good nucleation, growth on the surfaces CNC.
The fibrous paper of 1 gained of embodiment 7-9 and comparative example is tested for the property, as a result as shown in table 1 below.
Catalyst catalytic performance compares under the additive amount of the different Cellulose nanocrystals of table 1
The test condition of Kinetics Rate Constants By Using in the present invention:To addition 1mL boron in 100 μ L paranitrophenols solution (5mM) Sodium hydride solution (100mM), 2mg CuFe2O4/ CNC catalyst and 1.9mL deionized waters, in comparative example catalyst amount with CuFe2O4CuFe in/CNC catalyst2O4Amount it is identical, tested.
As shown in Table 1, the present invention can be obviously improved the dispersibility of cu ferrite, structure by adding Cellulose nanocrystal The catalyst for building different degrees of scatter obtains cu ferrite/Cellulose nanocrystal catalyst of different catalytic performances, does not add relatively The cu ferrite for adding Cellulose nanocrystal, adds the cu ferrite of Cellulose nanocrystal, and Kinetics Rate Constants By Using improves 36~ 73%, so as to significantly improve catalytic performance.It can also be seen that by adjusting the additive amount of Cellulose nanocrystal, gained is urged The Kinetics Rate Constants By Using of agent changes therewith, i.e., catalytic performance changes therewith, can pass through the additive amount of Cellulose nanocrystal The dispersibility and catalytic performance of catalyst are regulated and controled.

Claims (10)

1. a kind of preparation method of cu ferrite/Cellulose nanocrystal catalyst, which is characterized in that include the following steps,
Step 1, Cellulose nanocrystal, Hydrated copper chloride, iron chloride hexahydrate, alkali source and surfactant are dissolved in organic solvent In, obtain mixed solution after being uniformly dispersed;
Step 2, mixed solution is subjected to solvent thermal reaction, separates solid after the completion of reaction, washed, it is dry, obtain copper Ferrite/Cellulose nanocrystal catalyst.
2. the preparation method of cu ferrite according to claim 1/Cellulose nanocrystal catalyst, which is characterized in that step In rapid 1, the length of Cellulose nanocrystal is 150~250nm, a diameter of 10~20nm.
3. the preparation method of cu ferrite according to claim 1/Cellulose nanocrystal catalyst, which is characterized in that step In rapid 1, the ratio of Cellulose nanocrystal, Hydrated copper chloride and iron chloride hexahydrate is in mixed solution:(0.06~0.2) g: 0.1mmol:0.2mmol.
4. the preparation method of cu ferrite according to claim 1/Cellulose nanocrystal catalyst, which is characterized in that step In rapid 1, alkali source is one or more of sodium acetate, sodium hydroxide, ammonium hydroxide, urea and sodium carbonate.
5. the preparation method of cu ferrite according to claim 1/Cellulose nanocrystal catalyst, which is characterized in that step In rapid 1, surfactant is one or both of polyethylene glycol and polyvinylpyrrolidone.
6. the preparation method of cu ferrite according to claim 1/Cellulose nanocrystal catalyst, which is characterized in that step In rapid 1, organic solvent is ethylene glycol.
7. the preparation method of cu ferrite according to claim 1/Cellulose nanocrystal catalyst, which is characterized in that step In rapid 1, alkali source is sodium acetate, and surfactant is polyethylene glycol, Cellulose nanocrystal, Hydrated copper chloride, water in mixed solution Close ferric trichloride, the ratio of sodium acetate and polyethylene glycol is:(0.06~0.2) g:0.1mmol:0.2mmol:(1~2) g: (0.25~0.75) g.
8. the preparation method of cu ferrite according to claim 1/Cellulose nanocrystal catalyst, which is characterized in that step Rapid 1 is specially:First Cellulose nanocrystal is dissolved in organic solvent, it is molten to obtain Cellulose nanocrystal for ultrasonic disperse and mechanical agitation Liquid, then Hydrated copper chloride, iron chloride hexahydrate, alkali source, surfactant and organic molten are added into Cellulose nanocrystal solution After agent, ultrasonic disperse and mechanical agitation, mixed solution is obtained.
9. the preparation method of cu ferrite according to claim 1/Cellulose nanocrystal catalyst, which is characterized in that step In rapid 2, reaction temperature is 190~210 DEG C, and the reaction time is 9~11h.
10. a kind of be catalyzed using cu ferrite/Cellulose nanocrystal made from any one of the claim 1-9 preparation methods Agent.
CN201810108346.1A 2018-02-02 2018-02-02 A kind of cu ferrite/Cellulose nanocrystal catalyst and preparation method thereof Pending CN108295904A (en)

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CN109746044A (en) * 2019-01-22 2019-05-14 陕西科技大学 A kind of CuFe2O4/ CNC@Ag@ZIF-8 catalyst and its preparation method and application
CN111569865A (en) * 2020-06-03 2020-08-25 齐鲁工业大学 Bio-based low-temperature denitration catalyst and preparation method thereof
CN114618496B (en) * 2020-12-10 2023-06-06 中国科学院大连化学物理研究所 Preparation method of transition metal catalyst and application of transition metal catalyst in preparation of furandicarboxylic acid
CN114618496A (en) * 2020-12-10 2022-06-14 中国科学院大连化学物理研究所 Preparation method of transition metal catalyst and application of transition metal catalyst in preparation of furandicarboxylic acid
CN112657531A (en) * 2020-12-31 2021-04-16 北京工业大学 Preparation method and application of elemental copper and copper-iron oxide co-modified graphite-phase carbon nitride magnetic catalyst
CN112657531B (en) * 2020-12-31 2023-12-29 北京工业大学 Preparation method and application of elemental copper and copper-iron oxide co-modified graphite phase carbon nitride magnetic catalyst
CN113663737A (en) * 2021-08-19 2021-11-19 南京医科大学康达学院 CMC-Fe-based microsphere and preparation method and application thereof
CN113663737B (en) * 2021-08-19 2023-08-15 南京医科大学康达学院 CMC-Fe-based microsphere, and preparation method and application thereof
CN113683115A (en) * 2021-09-01 2021-11-23 深圳市动盈先进材料有限公司 Preparation method of semiconductor material for 5G signal transmission
CN113926481A (en) * 2021-09-29 2022-01-14 东华大学 CNC/g-C3N4Nanocomposite material, preparation and application thereof
CN113925061A (en) * 2021-11-18 2022-01-14 陕西理工大学 Preparation method and application of magnetic nano ferrite material
CN114570425A (en) * 2022-03-31 2022-06-03 安徽医科大学 Modified CuFe2O4Synthetic method and application thereof
CN114570425B (en) * 2022-03-31 2023-05-30 安徽医科大学 Modified CuFe 2 O 4 Synthesis method and application thereof
CN115414936A (en) * 2022-07-27 2022-12-02 太原理工大学 Defect copper ferrite photocatalytic material and one-step preparation method and application thereof
CN115414936B (en) * 2022-07-27 2024-04-23 太原理工大学 Defective copper ferrite photocatalytic material, one-step preparation method and application thereof
CN115679471A (en) * 2022-12-09 2023-02-03 福州市福塑科学技术研究所有限公司 Preparation method of rod-shaped hollow nano copper oxide antibacterial wear-resistant polyamide fiber

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