CN107497486A - A kind of catalyst preparation of metal organogel supporting Pt and its application on photocatalysis hydrogen production - Google Patents

A kind of catalyst preparation of metal organogel supporting Pt and its application on photocatalysis hydrogen production Download PDF

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Publication number
CN107497486A
CN107497486A CN201710661498.XA CN201710661498A CN107497486A CN 107497486 A CN107497486 A CN 107497486A CN 201710661498 A CN201710661498 A CN 201710661498A CN 107497486 A CN107497486 A CN 107497486A
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solution
supporting
catalyst
mil
prepared
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赵君
秦正生
李东升
董文文
吴亚盘
卜贤辉
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China Three Gorges University CTGU
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China Three Gorges University CTGU
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/1691Coordination polymers, e.g. metal-organic frameworks [MOF]
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/22Organic complexes
    • B01J31/2204Organic complexes the ligands containing oxygen or sulfur as complexing atoms
    • B01J31/2208Oxygen, e.g. acetylacetonates
    • B01J31/2226Anionic ligands, i.e. the overall ligand carries at least one formal negative charge
    • B01J31/223At least two oxygen atoms present in one at least bidentate or bridging ligand
    • B01J31/2239Bridging ligands, e.g. OAc in Cr2(OAc)4, Pt4(OAc)8 or dicarboxylate ligands
    • B01J35/23
    • B01J35/39
    • B01J35/60
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02Impregnation, coating or precipitation
    • B01J37/03Precipitation; Co-precipitation
    • B01J37/036Precipitation; Co-precipitation to form a gel or a cogel
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/02Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
    • C01B3/04Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of inorganic compounds, e.g. ammonia
    • C01B3/042Decomposition of water
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2531/00Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/02Compositional aspects of complexes used, e.g. polynuclearity
    • B01J2531/0213Complexes without C-metal linkages
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2531/00Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/02Compositional aspects of complexes used, e.g. polynuclearity
    • B01J2531/0238Complexes comprising multidentate ligands, i.e. more than 2 ionic or coordinative bonds from the central metal to the ligand, the latter having at least two donor atoms, e.g. N, O, S, P
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2531/00Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/30Complexes comprising metals of Group III (IIIA or IIIB) as the central metal
    • B01J2531/31Aluminium
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/36Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Dispersion Chemistry (AREA)
  • Catalysts (AREA)

Abstract

The invention belongs to photocatalysis hydrogen production field, more particularly to a kind of method for preparing catalyst of the metal organogel supporting Pt based on MIL 100 (Al), including(1)Metal organogel is prepared as raw material using aluminium salt and trimesic acid;(2)The solution containing platinum ion is prepared, obtains solution A;(3)Solution A is slowly injected into metal organic gel materials, then lucifuge stands a period of time;(4)By the organic metal gel detergent after load, the catalyst of metal organogel supporting Pt is drying to obtain;(5)The catalyst of metal organogel supporting Pt is reacted for photolysis water hydrogen.Catalyst preparation of the present invention is simple, catalyst service life length, has big specific surface area, can effectively reduce reaction activity, can dramatically speed up light-catalyzed reaction process.

Description

The catalyst preparation of a kind of metal organogel supporting Pt and its on photocatalysis hydrogen production Application
Technical field
The invention belongs to photocatalysis hydrogen production field, technology is related to metal organogel, and particularly one kind is based on MIL-100 (Al) metal organogel(MOG)The preparation method of supporting Pt and its application in terms of photocatalysis hydrogen production.
Background technology
Under the background that science and technology develops rapidly with industrialized level, the mankind were also just former for the degree of dependence of the energy The speed not having increases.Undue use fossil energy, not only consumes the only surplus resource of the earth, the thing followed also has Problem of environmental pollution, the serious life for having had influence on people of these problems.Nowadays, want solution and concern whole mankind's existence With the ultimate problem of development, unique approach is exactly to find new reproducible clean energy resource, and solar energy become one It now appear that optimal selection.
By the utilization to luminous energy, chemical energy, especially Hydrogen Energy are converted light energy into, can solve above-mentioned ask well Topic.The method for making it have photocatalysis performance to Photocatalyst and with the means of dye sensitization by using MOGs materials, The new photochemical catalyst applied to photocatalysis hydrogen production field is prepared, more efficient photochemical catalyst is desirably to obtain, effectively carries Rise the catalyst activity of photocatalysis hydrogen production reaction.
Metal organogel(MOG)It is that metallo-organic compound particle is acted on by Van der Waals force, intermolecular force etc. Power is self-assembly of irregular tridimensional network in space.It has big specific surface area and synthesis is simple, as urging There is very big potential application in terms of the carrier of agent.
The content of the invention
It is an object of the invention to prepare a kind of metal organogel for being based on MIL-100 (Al)(MOG)Supporting Pt is urged Agent, use it for photocatalysis hydrogen production.This catalyst preparation is simple, can effectively improve photocatalysis hydrogen production speed, and is one Kind different-phase catalyst, separated and recovered after catalysis simple.
The method for preparing catalyst of metal organogel supporting Pt of the one kind based on MIL-100 (Al), can be as follows Carry out.
(1)By trimesic acid dissolving in a solvent, the solution containing trimesic acid is prepared.
(2)Aluminium salt dissolves in a solvent, and preparation contains aluminum ions solution.
(3)By step(1)The solution of gained pours into step(2)In the solution of gained, stirring at room temperature makes it for a period of time It is sufficiently mixed, is then transferred in reactor, a period of time is reacted under high temperature, you can obtains wet solidifying based on MIL-100 (Al) Glue, then wet gel is washed three times with ethanol.
(4)Six hydration platinum acid chloride solutions are prepared, obtain solution A.
(5)Solution A is slowly injected into step(3)In wet gel after washing three times, lucifuge is stood.
(6)By step(5)Obtained wet gel washing, dries the catalyst that can obtain xerogel supporting Pt.
(7)Sensitising agent is dissolved in water, prepares the solution containing sensitising agent.
(8)Take triethanolamine to be added in the light reaction container of the solution prepared equipped with step 7, add step(6) In the obtained catalyst of xerogel supporting Pt.
(9)Photoactivation analysis system records the process of catalytic reaction.
Further, step of the present invention(1)And step(2)In used solvent be ethanol.
Further, step of the present invention(2)In aluminium salt be ANN aluminium nitrate nonahydrate.
Further, step of the present invention(3)In, the mol ratio of aluminium ion and trimesic acid is 1.5 ~ 2:1.
Further, step of the present invention(3)In high temperature be 140 DEG C, the time be 6 hours.
Further, step of the present invention(4)The middle solvent prepared used in six nitric hydrate silver solution is absolute ethyl alcohol, The dosage of six hydration chloroplatinic acids(Quality)For the 4/100 of xerogel.
Further, step of the present invention(5)In lucifuge time of repose be 36-48 hours.
Further, step of the present invention(6)Middle drying condition is lower 80 DEG C of vacuum.
Further, step of the present invention(7)Middle sensitising agent is that rhodamine B dosage is the ppm of 100 ppm ~ 250.Enter one Step ground, step of the present invention(8)Middle triethanolamine volume fraction is 10%.
Research finds, Pt beaded catalysts of receiving have an extensive prospects for commercial application, Pt nano particle due to its high surface from Decline catalytic activity by that agglomeration easily can occur in the reaction, so before supported Pt catalysts are with more application Scape.Metal organogel is a kind of porous material, have higher specific surface area and can modulation pore passage structure.
The catalyst of metal organogel supporting Pt prepared by the present invention, the active site of metal organogel and compared with High specific surface area, the degree of scatter of active component Pt nano particle can be improved and avoid it from reuniting so that the metal of preparation has The catalyst of machine gel supporting Pt is that usage amount seldom can also have superior catalytic performance during the course of the reaction.
Brief description of the drawings
Fig. 1 is wet gel figure before embodiment 2 loads(A)And the catalyst pictorial diagram dried after load(B).
Fig. 2 is the front and rear XRD of the metal organogel of embodiment 2 load.
Fig. 3 is the TEM figures after metal organogel supporting Pt made from the embodiment of the present invention 2.
Fig. 4 is the catalyst of metal organogel supporting Pt made from the embodiment of the present invention 2 under different rhodamine B concentration Hydrogen-producing speed.
Embodiment
With reference to embodiment, the invention will be further described, but the present invention is not limited to following examples.
Embodiment 1
0.4856g ANN aluminium nitrate nonahydrates [Al (NO are weighed first3)3·9H2O] it is fully dissolved in 8mL absolute ethyl alcohols;Weigh 0.2101g trimesic acids are dissolved in 8mL absolute ethyl alcohols;Both of which ultrasound is to being completely dissolved, after then former solution is poured into In person's solution, mixed solution is stirred at room temperature on magnetic stirring apparatus to 5 minutes to well mixed.Then mixed solution is transferred to In 30mL reactors, 140 DEG C of insulation 6h in air dry oven are put into, are cooled down, washing, it is possible to obtain metal organogel.Connect Weigh 0.0121g six be hydrated chloroplatinic acid be dissolved completely in 15mL absolute ethyl alcohols, obtain platinum acid chloride solution.By platinum acid chloride solution It is slowly injected into the beaker equipped with gel, its lucifuge is then stood into 36h, washed three times with absolute ethyl alcohol, you can loaded There is Pt metal organogel.The metal organogel for being loaded with Pt of above-mentioned gained is dried in vacuo 12h at 80 DEG C Obtain the catalyst of metal organogel supporting Pt.Compound concentration is 100 ppm rhodamine B solution, takes above-mentioned solution 72mL Into light reaction container, 8mL triethanolamine is added, photoactivation analysis system records the process of catalytic reaction.Produce hydrogen speed Rate is 139.64 μm of olg-1h-1
Embodiment 2
0.4856g ANN aluminium nitrate nonahydrates [Al (NO are weighed first3)3·9H2O] it is fully dissolved in 8mL absolute ethyl alcohols;Weigh 0.2101g trimesic acids are dissolved in 8mL absolute ethyl alcohols;Both of which ultrasound is to being completely dissolved, after then former solution is poured into In person's solution, mixed solution is stirred at room temperature on magnetic stirring apparatus to 5 minutes to well mixed.Then mixed solution is transferred to In 30mL reactors, 140 DEG C of insulation 6h in air dry oven are put into, are cooled down, washing, it is possible to obtain metal organogel.Connect Weigh 0.0121g six be hydrated chloroplatinic acid be dissolved completely in 15mL absolute ethyl alcohols, obtain platinum acid chloride solution.By platinum acid chloride solution It is slowly injected into the beaker equipped with gel, its lucifuge is then stood into 36h, washed three times with absolute ethyl alcohol, you can loaded There is Pt metal organogel.The metal organogel for being loaded with Pt of above-mentioned gained is dried in vacuo 12h at 80 DEG C Obtain the catalyst of metal organogel supporting Pt.Compound concentration is 150 ppm rhodamine B solution, takes above-mentioned solution 72mL Into light reaction container, 8mL triethanolamine is added, photoactivation analysis system records the process of catalytic reaction.Produce hydrogen speed Rate is 340.63 μm of olg-1h-1
Embodiment 3
0.4856g ANN aluminium nitrate nonahydrates [Al (NO are weighed first3)3·9H2O] it is fully dissolved in 8mL absolute ethyl alcohols;Weigh 0.2101g trimesic acids are dissolved in 8mL absolute ethyl alcohols;Both of which ultrasound is to being completely dissolved, after then former solution is poured into In person's solution, mixed solution is stirred at room temperature on magnetic stirring apparatus to 5 minutes to well mixed.Then mixed solution is transferred to In 30mL reactors, 140 DEG C of insulation 6h in air dry oven are put into, are cooled down, washing, it is possible to obtain metal organogel.Connect Weigh 0.0121g six be hydrated chloroplatinic acid be dissolved completely in 15mL absolute ethyl alcohols, obtain platinum acid chloride solution.By platinum acid chloride solution It is slowly injected into the beaker equipped with gel, its lucifuge is then stood into 36h, washed three times with absolute ethyl alcohol, you can loaded There is Pt metal organogel.The metal organogel for being loaded with Pt of above-mentioned gained is dried in vacuo 12h at 80 DEG C Obtain the catalyst of metal organogel supporting Pt.Compound concentration is 200 ppm rhodamine B solution, takes above-mentioned solution 72mL Into light reaction container, 8mL triethanolamine is added, photoactivation analysis system records the process of catalytic reaction.Produce hydrogen speed Rate is 283.42 μm of olg-1h-1
Embodiment 4
0.4856g ANN aluminium nitrate nonahydrates [Al (NO are weighed first3)3·9H2O] it is fully dissolved in 8mL absolute ethyl alcohols;Weigh 0.2101g trimesic acids are dissolved in 8mL absolute ethyl alcohols;Both of which ultrasound is to being completely dissolved, after then former solution is poured into In person's solution, mixed solution is stirred at room temperature on magnetic stirring apparatus to 5 minutes to well mixed.Then mixed solution is transferred to In 30mL reactors, 140 DEG C of insulation 6h in air dry oven are put into, are cooled down, washing, it is possible to obtain metal organogel.Connect Weigh 0.0121g six be hydrated chloroplatinic acid be dissolved completely in 15mL absolute ethyl alcohols, obtain platinum acid chloride solution.By platinum acid chloride solution It is slowly injected into the beaker equipped with gel, its lucifuge is then stood into 36h, washed three times with absolute ethyl alcohol, you can loaded There is Pt metal organogel.The metal organogel for being loaded with Pt of above-mentioned gained is dried in vacuo 12h at 80 DEG C Obtain the catalyst of metal organogel supporting Pt.Compound concentration is 250 ppm rhodamine B solution, takes above-mentioned solution 72mL Into light reaction container, 8mL triethanolamine is added, photoactivation analysis system records the process of catalytic reaction.Produce hydrogen speed Rate is 213.14 μm of olg-1h-1
The preferred embodiment of the present invention is the foregoing is only, is not intended to limit the invention, for the technology of this area For personnel, within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., it should be included in Within protection scope of the present invention.

Claims (6)

1. the method for preparing catalyst of organic metal gel supporting Pt of the one kind based on MIL-100 (Al), it is characterised in that by such as Lower step is carried out:
(1)By trimesic acid dissolving in a solvent, the solution containing trimesic acid is prepared, by aluminium salt dissolving in a solvent, prepared Contain aluminum ions solution;
(2)Solution containing trimesic acid is poured into containing in aluminum ions solution, stirring at room temperature makes it well mixed, then It is transferred in reactor, after being reacted under high temperature, is washed with absolute ethyl alcohol and obtain the wet gel based on MIL-100 (Al);
(3)Six hydration platinum acid chloride solutions are prepared, are injected into the wet gel based on MIL-100 (Al), lucifuge stands 36-48 hours After wash, at 80 DEG C, vacuum drying i.e. obtain the catalyst of xerogel supporting Pt.
2. the catalyst preparation side of the organic metal gel supporting Pt based on MIL-100 (Al) according to claims 1 Method, it is characterised in that:Step(1)Described in solvent be absolute ethyl alcohol, described aluminium salt is ANN aluminium nitrate nonahydrate.
3. the catalyst preparation side of the organic metal gel supporting Pt based on MIL-100 (Al) according to claims 1 Method, it is characterised in that:The step(2)The mol ratio of aluminium ion and trimesic acid is 1.5 ~ 2 in middle mixed solution:1;Equal benzene three The molar concentration of acid solution is 0.1-0.3mmol/mL;The molar concentration of aluminium ion solution is 0.1-0.3mmol/mL.
4. the catalyst preparation side of the organic metal gel supporting Pt based on MIL-100 (Al) according to claims 1 Method, it is characterised in that:The step(2)In high temperature be 120-150 DEG C, the reaction time be 6 hours.
5. the catalyst preparation side of the organic metal gel supporting Pt based on MIL-100 (Al) according to claims 1 Method, it is characterised in that:The step(3)The middle solvent prepared used in six hydration chloroplatinic acids is absolute ethyl alcohol, and six are hydrated chloroplatinic acids Quality be xerogel 4/100.
6. the organic metal gel supporting Pt based on MIL-100 (Al) being prepared described in claim any one of 1-6 is urged Application of the agent on photolysis water hydrogen.
CN201710661498.XA 2017-08-04 2017-08-04 A kind of catalyst preparation of metal organogel supporting Pt and its application on photocatalysis hydrogen production Pending CN107497486A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103111262A (en) * 2013-01-31 2013-05-22 北京大学 Porous material of metal-organic framework and preparation method of material
CN103240130A (en) * 2013-05-21 2013-08-14 中国石油大学(北京) TiO2 / MIL-101 composite catalyst for photocatalytic water splitting and preparation method and applications thereof
CN106111198A (en) * 2016-06-17 2016-11-16 三峡大学 A kind of preparation method and applications of the catalyst of metal organic gel materials loaded Ag based on MIL 100 (Al)

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103111262A (en) * 2013-01-31 2013-05-22 北京大学 Porous material of metal-organic framework and preparation method of material
CN103240130A (en) * 2013-05-21 2013-08-14 中国石油大学(北京) TiO2 / MIL-101 composite catalyst for photocatalytic water splitting and preparation method and applications thereof
CN106111198A (en) * 2016-06-17 2016-11-16 三峡大学 A kind of preparation method and applications of the catalyst of metal organic gel materials loaded Ag based on MIL 100 (Al)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DENGKE WANG ET AL.: "Effective photo-reduction to deposit Pt nanoparticles on MIL-100(Fe) for visible-light-induced hydrogen evolution", 《NEW J. CHEM.》 *

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Application publication date: 20171222