CN111151301B - Bifunctional heterogeneous Pd @ MIL-101@ SGO composite material and preparation method and application thereof - Google Patents
Bifunctional heterogeneous Pd @ MIL-101@ SGO composite material and preparation method and application thereof Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 230000001588 bifunctional effect Effects 0.000 title claims abstract description 16
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 39
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 24
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 13
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000005580 one pot reaction Methods 0.000 claims abstract description 10
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- 238000001914 filtration Methods 0.000 claims abstract description 9
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- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 7
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 6
- GVHCUJZTWMCYJM-UHFFFAOYSA-N chromium(3+);trinitrate;nonahydrate Chemical compound O.O.O.O.O.O.O.O.O.[Cr+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O GVHCUJZTWMCYJM-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 239000003054 catalyst Substances 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 9
- 230000003197 catalytic effect Effects 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 9
- 238000006722 reduction reaction Methods 0.000 claims description 7
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- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
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- 239000011259 mixed solution Substances 0.000 claims description 5
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 5
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical group CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 claims description 5
- 239000007800 oxidant agent Substances 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 159000000000 sodium salts Chemical class 0.000 claims description 4
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- 239000012286 potassium permanganate Substances 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000012279 sodium borohydride Substances 0.000 claims description 2
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 2
- 230000002194 synthesizing effect Effects 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 5
- 239000002638 heterogeneous catalyst Substances 0.000 abstract description 4
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- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 15
- 229910052763 palladium Inorganic materials 0.000 description 7
- 239000002105 nanoparticle Substances 0.000 description 6
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- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- PHFQLYPOURZARY-UHFFFAOYSA-N chromium trinitrate Chemical compound [Cr+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O PHFQLYPOURZARY-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000013067 intermediate product Substances 0.000 description 2
- 239000002082 metal nanoparticle Substances 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- 239000013177 MIL-101 Substances 0.000 description 1
- 239000013178 MIL-101(Cr) Substances 0.000 description 1
- 229910003244 Na2PdCl4 Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000006136 alcoholysis reaction Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000007809 chemical reaction catalyst Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000006735 epoxidation reaction Methods 0.000 description 1
- 150000002118 epoxides Chemical class 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
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- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001144 powder X-ray diffraction data Methods 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
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- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/1691—Coordination polymers, e.g. metal-organic frameworks [MOF]
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- B01J31/223—At least two oxygen atoms present in one at least bidentate or bridging ligand
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Abstract
The invention relates to a bifunctional heterogeneous Pd @ MIL-101@ SGO composite material and a preparation method and application thereof. The technical scheme is as follows: adding Sulfonated Graphene Oxide (SGO), terephthalic acid, chromium nitrate nonahydrate, hydrochloric acid and water into a container, stirring and ultrasonically treating until suspension is uniformly dispersed, sealing, putting into an oven, keeping at 473K for 8 hours, cooling to room temperature, washing, filtering and drying to obtain an MIL-101@ SGO composite material; and slowly dripping a methanol solution of sodium chloropalladate into the MIL-101@ SGO material, and reducing by using a reducing agent to obtain the Pd @ MIL-101@ SGO composite material. The Pd @ MIL-101@ SGO composite material prepared by the invention is a bifunctional heterogeneous catalyst for synthesizing beta-alkoxy alcohol by a one-pot tandem method of catalyzing styrene.
Description
Technical Field
The invention belongs to the field of chemical synthesis, and particularly relates to a palladium-loaded metal organic framework and sulfonated graphene oxide composite material and application thereof in a reaction of synthesizing beta-alkoxy alcohol by a catalytic styrene one-pot series connection method.
Background
The palladium nano particles are a high-efficiency heterogeneous catalyst and have high catalytic activity. In recent years, palladium nanoparticles have often been supported on a carrier for catalyzing various organic reactions. The metal organic framework material is a good carrier, has an ultrahigh specific surface area, is stable in structure and good in thermal stability, and has a plurality of advantages compared with other porous material carriers. However, it is difficult to directly introduce strong Bronsted acid groups onto metal organic framework materials, the yield is low and mass production is not favored.
The one-pot series reaction is a high-efficiency, energy-saving and environment-friendly chemical synthesis method, and attracts the interest of the majority of chemical researchers more and more. The series reaction usually refers to the continuous reaction of two or more steps, and the final product is directly synthesized without separating intermediate products, so that the discharge of pollutants can be effectively reduced. Beta-alkoxy alcohol is an organic solvent, a fine chemical raw material, a general synthon and a medical intermediate. The existing main approach for synthesizing beta-alkoxy alcohol is to synthesize olefin through multi-step reaction, including epoxidation of olefin and alcoholysis of epoxide, and the method used at present is complex, needs to separate intermediate products and has great environmental pollution.
Disclosure of Invention
The invention aims to provide a bifunctional heterogeneous catalyst Pd @ MIL-101@ SGO composite material and a preparation method thereof. The prepared Pd @ MIL-101@ SGO composite material has catalytic performance when used as a metal nano particle and a Bronsted acid bifunctional catalyst for synthesizing beta-alkoxy alcohol by a styrene one-pot series connection method.
According to the invention, a metal organic framework MIL-101(Cr) grows on Sulfonated Graphene Oxide (SGO) through a hydrothermal method, and then palladium nanoparticles are loaded through an equivalent impregnation method to form a novel composite material Pd @ MIL-101@ SGO.
In order to achieve the purpose, the invention adopts the following technical scheme: a preparation method of a bifunctional heterogeneous Pd @ MIL-101@ SGO composite material comprises the following steps:
1) adding sulfonated graphene oxide, terephthalic acid, chromium nitrate nonahydrate, concentrated hydrochloric acid and water into a container, stirring and ultrasonically treating until the suspension is uniformly dispersed, introducing the suspension into a reaction kettle, sealing the reaction kettle, putting the reaction kettle into an oven, keeping the reaction kettle at 493K for 8 hours, cooling to room temperature, standing for 1 day, washing with water, ethanol and dichloromethane, filtering and drying to obtain an MIL-101@ SGO solid;
2) dissolving palladium chloride with a solvent, adding sodium salt, and reacting to obtain a sodium chloropalladate solution;
3) slowly dripping the sodium chloropalladate solution into the MIL-101@ SGO solid to obtain an intermediate Pd2+@MIL-101@SGO；
4) The intermediate Pd2+The @ MIL-101@ SGO is subjected to reduction reaction by using a reducing agent to obtain the bifunctional heterogeneous Pd @ MIL-101@ SGO composite material.
Further, in the above preparation method, step 1), the preparation method of sulfonated graphene oxide includes the following steps: adding graphite powder, a mixed solution of concentrated sulfuric acid and phosphoric acid and potassium permanganate into a container cooled in an ice bath, uniformly mixing, stirring for 12 hours at 423K, cooling to room temperature, introducing the suspension into the container filled with a mixture of ice water and hydrogen peroxide, stirring for 12 hours at room temperature, washing with water, concentrated hydrochloric acid and ethanol, filtering, and drying in vacuum at 353K for 12 hours to obtain the solid sulfonated graphene oxide SGO.
Further, in the preparation method, in step 1), the mass ratio of the sulfonated graphene oxide to the terephthalic acid to the chromium nitrate nonahydrate to the concentrated hydrochloric acid is 1:2.6-3.2:6.8-7.4: 1.4-2.0.
Further, in the above preparation method, in step 2), the solvent is methanol, and the sodium salt is sodium chloride.
Further, in the above preparation method, the molar ratio of sodium chloride to palladium chloride is 19: 17.
Further, in the preparation method, in the step 4), the reducing agent is sodium borohydride, the reduction reaction temperature is 298K, and the reduction time is 30 min.
Application of bifunctional heterogeneous Pd @ MIL-101@ SGO composite material in synthesizing beta-alkoxy alcohol by a catalytic styrene one-pot tandem method. The method comprises the following steps: taking styrene, an oxidant, a solvent and a catalyst into a reaction tube, and stirring and reacting for 5 hours under the condition of 343K; the catalyst is the bifunctional heterogeneous Pd @ MIL-101@ SGO composite material.
Further, the oxidant is tert-butyl hydroperoxide, and the solvent is a mixed solution of methanol and water.
Further, in the solvent, the ratio of methanol to water is 1:3 by volume.
The invention has the beneficial effects that:
sulfonated Graphene Oxide (SGO) is a material with a strong Bronsted acid, and the sheet-like structure material is not beneficial to the loading of palladium nanoparticles. According to the invention, a metal organic framework MIL-101 and sulfonated graphene oxide are combined to form a composite material MIL-101@ SGO, and then palladium nanoparticles are loaded on the composite material, so that a novel composite material Pd @ MIL-101@ SGO with bifunctional groups is formed. The Pd @ MIL-101@ SGO composite material prepared by the invention is a bifunctional heterogeneous catalyst simultaneously provided with metal nanoparticles and Bronsted acid. The catalyst has excellent catalytic activity for the reaction of synthesizing beta-alkoxy alcohol by a styrene one-pot series method, the reaction time is only 5 hours, the yield can reach 100 percent, and the catalyst is easy to separate from reactants and has good recycling capability. Therefore, the catalyst has very high application value.
Drawings
FIG. 1 is an XRD pattern of a Pd @ MIL-101@ SGO composite material and MIL-101@ SGO of the present invention.
FIG. 2 is a transmission electron microscope image of the Pd @ MIL-101@ SGO composite of the present invention.
FIG. 3 shows the catalytic activity of the Pd @ MIL-101@ SGO composite material of the present invention in five catalytic cycles.
Detailed Description
In order that the invention may be better understood, the invention is further illustrated by the following examples, which are to be construed as being better understood and not limiting upon the scope of the invention.
Example 1 Pd @ MIL-101@ SGO composite
The preparation method comprises
1. Preparation of Sulfonated Graphene Oxide (SGO): adding 30g of graphite powder, 400mL of mixed solution of concentrated sulfuric acid and phosphoric acid (volume ratio is 9:1) and 9g of potassium permanganate into a container cooled in an ice bath, uniformly mixing, stirring for 12 hours at 423K, cooling to room temperature, introducing the suspension into a container filled with 400mL of ice water and 3mL of hydrogen peroxide, stirring for 12 hours at room temperature, sequentially washing with water, concentrated hydrochloric acid and ethanol, filtering, and vacuum-drying for 12 hours at 353K to obtain the SGO solid.
2. Preparation of MIL-101@ SGO composite: h is to be2BDC(1.328g,8mmol)、Cr(NO3)3·9H2Dissolving O (3.2g,8mmol) and concentrated hydrochloric acid (0.789g) in 40mL of ultrapure water, adding 0.4528g of SGO, stirring, performing ultrasonic treatment until the suspension is uniformly dispersed, pouring the suspension into an 80mL reaction kettle, sealing the reaction kettle, heating in a 493K oven for 8 hours, sequentially washing with water, ethanol and dichloromethane for 3 times, filtering and drying to obtain the MIL-101@ SGO composite material.
3. Activation of MIL-101@ SGO composite: the dried MIL-101@ SGO was spread in a thin layer in an open container and dried under vacuum at 423K for 12 h.
4. Preparing a sodium chloropalladate solution: dissolving palladium chloride (20mg, 0.68mmol) in 4mL of methanol, adding sodium chloride (44mg, 0.76mmol), and stirring at room temperature for 12 hr to obtain sodium chloropalladate solution (Na)2PdCl4)。
5. Preparation of Pd @ MIL-101@ SGO composite material: 50mg of activated MIL-101@ SGO was placed in a vial, and 60. mu.L of Na was added dropwise thereto2PdCl4(0.17mol/L) Methanol solution to Na2PdCl4The methanol solution is completely absorbed to obtain an intermediate Pd2+@MIL-101@SGO。
Then, the intermediate Pd is stirred2+0.6mol/L NaBH is added dropwise while @ MIL-101@ SGO is added43mL of methanol solution is subjected to reduction reaction at 298K for 30 min. After filtering, vacuum drying for 12h at 393K to obtain the target product Pd @ MIL-101@ SGO composite material.
FIG. 1 is a powder X-ray diffraction (PXRD) pattern of a Pd @ MIL-101@ SGO composite material, showing the structural integrity of the Pd @ MIL-101@ SGO composite material during the preparation process.
FIG. 2 is a Transmission Electron Microscope (TEM) image of the Pd @ MIL-101@ SGO composite material, wherein the microscopic morphology of Pd @ MIL-101 can be observed, and palladium nanoparticles are well loaded in the pores of the MIL-101@ SGO.
Example 2 Pd @ MIL-101@ SGO composite catalytic function in one pot tandem Synthesis of beta-alkoxy alcohol with styrene
The Pd @ MIL-101@ SGO composite material prepared in example 1 is used as a catalyst to catalyze the reaction of synthesizing beta-alkoxy alcohol by a styrene one-pot tandem method.
The method comprises the following steps: 1mmol of styrene, 2mmol of t-butyl hydroperoxide, 1mL of methanol, 3mL of water, and 50mg of a catalyst were put in a 10mL reaction tube, and stirred and heated under 343K. The experimental results were monitored by gas chromatograph GC, and as the reaction proceeded, the yield of the reaction gradually increased, and the yield reached 100% at 5 hours. The reaction formula is as follows:
after the reaction is completed, the catalyst is separated by filtration, washed several times with water, methanol, filtered off again and dried in vacuo. The recovered catalyst was subjected to the next cycle experiment. As shown in fig. 3, the activity of the catalyst did not decrease even after the cycle experiment was performed to the 5 th round. The Pd @ MIL-101@ SGO composite material can be recycled as a reaction catalyst for synthesizing beta-alkoxy alcohol by a styrene one-pot series method.
Claims (9)
1. A preparation method of a bifunctional heterogeneous Pd @ MIL-101@ SGO composite material is characterized by comprising the following steps:
1) adding sulfonated graphene oxide, terephthalic acid, chromium nitrate nonahydrate, concentrated hydrochloric acid and water into a container, stirring and ultrasonically treating until the suspension is uniformly dispersed, introducing the suspension into a reaction kettle, sealing the reaction kettle, putting the reaction kettle into an oven, keeping the reaction kettle at 493K for 8 hours, cooling to room temperature, standing for 1 day, washing with water, ethanol and dichloromethane, filtering and drying to obtain an MIL-101@ SGO solid;
2) dissolving palladium chloride with a solvent, adding sodium salt, and reacting to obtain a sodium chloropalladate solution;
3) slowly dripping the sodium chloropalladate solution into the MIL-101@ SGO solid to obtain an intermediate Pd2+@MIL-101@SGO；
4) The intermediate Pd2+The @ MIL-101@ SGO is subjected to reduction reaction by using sodium borohydride to obtain the bifunctional heterogeneous Pd @ MIL-101@ SGO composite material.
2. The preparation method according to claim 1, wherein in step 1), the preparation method of the sulfonated graphene oxide comprises the following steps: adding graphite powder, a mixed solution of concentrated sulfuric acid and phosphoric acid and potassium permanganate into a container cooled in an ice bath, uniformly mixing, stirring for 12 hours at 423K, cooling to room temperature, introducing the suspension into the container filled with a mixture of ice water and hydrogen peroxide, stirring for 12 hours at room temperature, washing with water, concentrated hydrochloric acid and ethanol, filtering, and drying in vacuum at 353K for 12 hours to obtain the solid sulfonated graphene oxide SGO.
3. The preparation method according to claim 1, wherein in step 1), the mass ratio of sulfonated graphene oxide to terephthalic acid to chromium nitrate nonahydrate to concentrated hydrochloric acid is 1:2.6-3.2:6.8-7.4: 1.4-2.0.
4. The method according to claim 1, wherein in step 2), the solvent is methanol and the sodium salt is sodium chloride.
5. The method according to claim 4, wherein the molar ratio of sodium chloride to palladium chloride =19: 17.
6. The method according to claim 1, wherein in the step 4), the reduction reaction temperature is 298K, and the reduction time is 30 min.
7. The use of the bifunctional heterogeneous Pd @ MIL-101@ SGO composite prepared according to the method of claim 1 in the catalytic styrene one-pot tandem synthesis of β -alkoxy alcohols.
8. Use according to claim 7, characterized in that the method is as follows: taking styrene, an oxidant, a solvent and a catalyst into a reaction tube, and stirring and reacting for 5 hours under the condition of 343K; the catalyst is the bifunctional heterogeneous Pd @ MIL-101@ SGO composite of claim 1; the oxidant is tert-butyl hydroperoxide, and the solvent is a mixed solution of methanol and water.
9. Use according to claim 8, wherein methanol to water =1:3 by volume in the solvent.
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