CN105921177A - Rare earth luminescence catalyst, and preparation method and applications thereof - Google Patents

Rare earth luminescence catalyst, and preparation method and applications thereof Download PDF

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CN105921177A
CN105921177A CN201610264470.8A CN201610264470A CN105921177A CN 105921177 A CN105921177 A CN 105921177A CN 201610264470 A CN201610264470 A CN 201610264470A CN 105921177 A CN105921177 A CN 105921177A
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hydrogen peroxide
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ascorbic acid
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陈扬
戚泽万
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Southeast University
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    • B01J2531/30Complexes comprising metals of Group III (IIIA or IIIB) as the central metal
    • B01J2531/38Lanthanides other than lanthanum

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Abstract

The invention discloses a rare earth luminescence catalyst. The rare earth luminescence catalyst is porous coordination polymer nanoparticles capable of realizing catalysis and luminescence indication of the hydrogen peroxide reaction progress, and is prepared through a solvothermal reaction of rare earth terbium ions, copper ions and ligand molecules, wherein the ligand molecules are m-phthalic acid. The invention also discloses a preparation method of the rare earth luminescence catalyst, and applications of the rare earth luminescence catalyst in catalysis of a reaction of hydrogen peroxide and ascorbic acid, in displaying of the reaction progress and in determination of the concentration of hydrogen peroxide or ascorbic acid. The rare earth luminescence catalyst has an excellent catalysis effect on the hydrogen peroxide reaction, and also can realize luminescence indication of the reaction progress, so the rare earth luminescence catalyst is a reaction catalyst and also is a reaction indicator. The rare earth luminescence catalyst provides a simple and rapid analysis method for catalysis of the hydrogen peroxide reaction and determination of the concentration of hydrogen peroxide or ascorbic acid.

Description

A kind of rare earth luminous catalyst and its preparation method and application
Technical field
The present invention relates to a kind of rare earth luminous catalyst, further relate to the preparation method and application of above-mentioned rare earth luminous catalyst, Belong to catalysis, luminous instruction field of material technology.
Background technology
Hydrogen peroxide, as a kind of oxidant, participates in many redox reaction, but the reaction participated in is under normal temperature condition Many carries out slowly needing catalyst.The reaction of peroxidase energy catalyzing hydrogen peroxide is quickly carried out, but, enzyme conduct A kind of protein, the easy degeneration when heating, some chemical environments easily lose catalysis activity, and they preparation, Purification and storage are all wasted time and energy.The catalyst of some energy catalyzing hydrogen peroxide redox reaction is successfully developed Coming, these catalyst include oxide, metal, sulfide, carbon and multi-metal oxygen salt.But, these synthesis at present The preparation of catalyst more complicated, catalytic effect is the most unsatisfactory.Develop that preparation is simple, catalytic efficiency high, preferably The catalyst of hydroperoxidation has demand and application widely.
The catalyst of many hydroperoxidations it has been reported that China Patent Publication No. CN102847531A, 2013, Zhang Hui, Lin Huiqing, Cai is satisfactory, Wu Ping, the preparation method of a kind of attapulgite and manganese dioxide nanocomposite, discloses one The method planting attapulgite and manganese dioxide nanocomposite catalyzing hydrogen peroxide reaction degraded dyeing waste water Methylene Blue dyestuff; China Patent Publication No. CN103508545A, 2014, Qujiang River English, Shi Lin, peak, Shao Guanghua, Li Yuqian, stone Ink alkene/MnO2The method of nano-complex catalyzing hydrogen peroxide degradation of methylene blue, discloses one Graphene/MnO2 The method of nano-complex catalyzing hydrogen peroxide degradation of methylene blue;China Patent Publication No. CN101130169,2008 Year, Ma Jun, Zhang Yingjie, Chen Lei, Zhang Liang, Yao Jun, the preparation of Complexing Iron catalyst and multiphase photocatalysis of hydrogen peroxide thereof Application, disclose a kind of cation exchange resin granule or film absorption ferric complex as catalyst peroxidating The method that hydrogen decomposes;China Patent Publication No. CN101530798,2009, Yan Xiyun, Zhuan Jie, usury increased, poplar The east tinkling of pieces of jade, Feng Jing, the novel agent of detection content of hydrogen peroxide and new method, disclose the magnetic Nano material of a kind of enzyme simulation The reaction of catalyzing hydrogen peroxide, the method generating color products detection hydrogen peroxide;China Patent Publication No. CN103712983A, 2014, Wang Kun, Yang Xingwang, Qian Jing, imitate the acetylcholine of enzymatic property based on magnetic graphene Visible detection method, discloses a kind of Fe with peroxidase property3O4/ rGO material catalyzing hydrogen peroxide substrate 3,3 ', 5,5 '-tetramethyl benzidine (TMB) generates the method for blue product detection hydrogen peroxide;China Patent Publication No. CN104568926A, 2015, Xu Guobao, fills in agate Han Ni cottonrose hibiscus, opens dawn, Pi Teyuehan, the inspection of a kind of creatinine Survey method, discloses a kind of cobalt ion catalyzing hydrogen peroxide oxidation creatinine, causes the method that creatinine product is luminous;China is specially Profit publication number CN104258876A, 2015, Chen Mindong, Xu started an undertaking, Luo Yue, Zhang Tongyu, Teng Fei, and a kind of silver is micro- Rice noodle photocatalyst and its preparation method and application, discloses a kind of method that silver micro wire catalyzing hydrogen peroxide decomposes;In State's patent publication No. CN104777117A, 2015, Chen Wei, Lin little Qing, Deng was luxurious, Wu Gangwei, Li Guangwen, base In the method that graphene oxide-Platinum Nanoparticles composite measures cysteine, disclose a kind of graphene oxide-Platinum Nanoparticles multiple The method of condensation material catalyzing hydrogen peroxide oxidation TMB hydrochlorate colour developing;China Patent Publication No. CN105214646A, 2016, Peng Huaping, Liu Ailin, Chen Wei, woods Xinhua, Liu Pan, gamma hch common vetch, tungsten oxide quanta point material simulation peroxide Compound enzyme, disclose a kind of tungsten oxide quanta point material Mimetic enzyme catalyzing hydrogen peroxide oxidation TMB, 2,2 '- The method of azino-bis-(3-ethyl benzo thiazole phenanthroline-6-sulfonic acid) chromogenic reagent such as di-ammonium salts and o-phenylenediamine;Chinese patent is public The number of opening CN105372236A, 2016, Li Bin, Chen Daomei, Wang Jiaqiang, the side of a kind of high-sensitivity detection cancerous cell Method, discloses a kind of metal organic framework compound Fe-MIL-101, and catalyzing hydrogen peroxide oxidation substrates TMB occurs face The method of complexion changed.
Summary of the invention
Goal of the invention: the technical problem to be solved is to provide a kind of rare earth luminous catalyst, this is rare earth luminous urges Agent contains rare earth ion, is the catalyst of hydroperoxidation, is also the indicator showing hydroperoxidation progress, There is catalysis and the function of luminous instruction hydroperoxidation the most simultaneously.
The present invention also to solve the technical problem that the preparation method being to provide above-mentioned rare earth luminous catalyst.
The present invention finally to solve the technical problem that to be to provide above-mentioned rare earth luminous catalyst bad with anti-at catalyzing hydrogen peroxide Hematic acid reaction and the application in terms of showing the application in terms of its extent of reaction and measuring hydrogen peroxide or ascorbic acid concentrations.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is:
A kind of rare earth luminous catalyst, described rare earth luminous catalyst is for entering for catalysis and luminous instruction hydroperoxidation The Porous coordination polymer nanoparticle of degree, it is passed through solvent thermal reaction by rare earth terbium ion, copper ion and ligand molecular thereof Synthesis prepares;Wherein, described ligand molecular is M-phthalic acid (PA).
The preparation method of above-mentioned rare earth luminous catalyst, specifically includes following steps:
Step 1, is sequentially added into rare earth terbium ion aqueous solution and copper ion in the DMF of certain volume Aqueous solution, obtains mixed solution A;While stirring the DMF solution being dissolved with M-phthalic acid is added Enter in mixed solution A, obtain mixed solution B;Wherein, in mixed solution B, rare earth terbium ion, copper ion and The mol ratio of M-phthalic acid is 1: 1: 2, and DMF is 7: 4 with the volume ratio of water;
Step 2, transfers to teflon-lined reaction after the mixed solution B of step 1 is stirred reaction a period of time In still, react 3 hours at 160 DEG C, naturally cool to room temperature, the centrifugal precipitation generated of collecting, by washing of precipitate also Dry.
Above-mentioned rare earth luminous catalyst catalyzing hydrogen peroxide and ascorbic acid react and show in terms of its extent of reaction should With.
Above-mentioned rare earth luminous catalyst is dense with hydrogen peroxide in ascorbic acid reactant liquor or ascorbic acid at mensuration hydrogen peroxide Application in terms of degree.
The rare earth luminous catalyst of the present invention catalyzing hydrogen peroxide react with ascorbic acid and show its extent of reaction should With: in hydrogen peroxide and ascorbic acid reactant liquor, add the rare earth luminous catalyst suspension of the present invention, mix few minutes after Solution starts fluorescence occur, and fluorescence intensity gradually becomes strong with reaction, until no longer changing, illustrates that reaction is completely;By The product effect generated can be reacted with hydrogen peroxide and ascorbic acid in rare earth luminous catalyst and produce fluorescence, fluorescence intensity Change reflects the degree that hydrogen peroxide reacts with ascorbic acid.
The rare earth luminous catalyst of the present invention can be additionally used in mensuration hydrogen peroxide and hydrogen peroxide in ascorbic acid reactant liquor or anti- The concentration of bad hematic acid: add the rare earth luminous catalyst suspension of the present invention in liquid to be determined, after mixing 10 minutes, Under uviol lamp, observe its fluorescence color and compare with the standard fluorescence color diagram of known hydrogen peroxide or ascorbic acid concentrations, I.e. can obtain hydrogen peroxide or the concentration of ascorbic acid in this solution;Or with terbium ion in fluorescent spectrophotometer assay solution Fluorescence intensity, obtain this according to terbium ion fluorescence intensity and the working curve diagram of hydrogen peroxide or ascorbic acid concentrations to be measured Hydrogen peroxide or the content of ascorbic acid in solution.
Compared with prior art, the invention have the advantages that:
First, the rare earth luminous catalyst of the present invention is a kind of Porous coordination polymer nanoparticle, and Porous coordination polymer is received Rice corpuscles has the mechanical performance that high specific surface area is become reconciled, and is a kind of novel catalyst material;
Secondly, the rare earth luminous catalyst of the present invention also has instruction while the hydroperoxidation catalysis having had The function of its extent of reaction, be catalysts be also reaction indicator, and also it is anti-that luminous intensity can be utilized to measure Answering hydrogen peroxide or the concentration of ascorbic acid in liquid, luminous intensity is directly proportional to the content of hydrogen peroxide or ascorbic acid, than Conventional coloration method has higher mensuration sensitivity;
Again, the rare earth luminous catalyst of the present invention utilizes rare earth luminescence, and the fluorescence lifetime of rare earth ion length allows the time The use of resolved fluorometric technology, moreover it is possible to eliminate the interference of various background fluorescence, to sample or the life with background fluorescence interference Hydrogen peroxide or the mensuration of ascorbic acid in objects system have advantage;
Finally, the raw material that the rare earth luminous method for preparing catalyst of the present invention uses is common, and synthetic method is simple, cost of manufacture Low.
Accompanying drawing explanation
Fig. 1 is the transmission electron microscope picture of the present invention rare earth luminous catalyst Tb-Cu-PA;
Fig. 2 is the present invention rare earth luminous catalyst Tb-Cu-PA catalyzing hydrogen peroxide and the luminous intensity of ascorbic acid reaction Figure;
Fig. 3 is fluorescence intensity and the work of concentration of hydrogen peroxide in solution of the present invention rare earth luminous catalyst Tb-Cu-PA Curve chart;
Fig. 4 is the fluorescence face of the ascorbic acid of variable concentrations in the present invention rare earth luminous catalyst Tb-Cu-PA instruction solution Chromatic graph;
Fig. 5 is fluorescence intensity and the work of ascorbic acid concentrations in solution of the present invention rare earth luminous catalyst Tb-Cu-PA Curve chart.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment, technical scheme is described in detail.
Embodiment 1
The preparation method of the present invention rare earth luminous catalyst Tb-Cu-PA nanoparticle, specifically includes following steps:
Step 1, is sequentially added into the Tb (NO that 2mL concentration is 20mM in 5mL DMF3)3 Aqueous solution and the Cu (NO that 2mL concentration is 20mM3)2Aqueous solution, obtains mixed solution A after mix homogeneously;Then Under being stirred continuously, the DMF solution that 2mL is dissolved with M-phthalic acid joins mixed solution In A, obtain mixed solution B;It is dissolved with M-phthalic acid in the DMF solution of M-phthalic acid Concentration be 40mM;
Step 2, is stirred at room temperature the mixed solution B of step 1 reaction 20min, transfers to teflon-lined In reactor, react 3 hours at 160 DEG C, naturally cool to room temperature, the centrifugal greenish precipitate collecting generation; Will precipitation the most respectively with dehydrated alcohol and milli-Q water 2 times, then precipitation is placed in dry for standby at 40~80 DEG C;Close The rare earth luminous catalyst become is expressed as Tb-Cu-PA.
Tb-Cu-PA after drying weighs, and is resuspended in pure water the Tb-Cu-PA suspension being prepared as required mass concentration Liquid is standby.
Fig. 1 is the transmission electron microscope picture of the rare earth luminous catalyst Tb-Cu-PA that embodiment 1 prepares, as shown in Figure 1, Tb-Cu-PA is the nanoparticle with spherical shapes.
The rare earth luminous catalyst of the present invention is nanoparticle such that it is able to improves the specific surface area of catalyst, and then improves Its catalytic perfomance.
Embodiment 2
The rare earth luminous catalyst Tb-Cu-PA nanoparticle that embodiment 1 prepares is anti-with ascorbic acid at catalyzing hydrogen peroxide The application that should go up:
The H of 10 μ L is added in the HAc-NaAc buffer (10mM, pH 5.05) of 960 μ L2O2Solution (200 MM) and 10 μ L ascorbic acid (200mM), add 20 μ L Tb-Cu-PA suspensions (35 after mix homogeneously Mg/mL), react 20min under room temperature, then excite their fluorescence intensity of lower mensuration at 310nm.
Fig. 2 is that the rare earth luminous catalyst Tb-Cu-PA that embodiment 1 prepares reacts at catalyzing hydrogen peroxide and ascorbic acid During luminous intensity figure;Hydrogen peroxide is to react hardly with the reaction of ascorbic acid in the presence of not having catalyst , in the presence of luminous catalyst Tb-Cu-PA, in a few minutes, there is fluorescence in solution, fluorescence intensity with reaction carry out by Gradual change is strong, until no longer changing, illustrates that reaction is completely.
Embodiment 3
The rare earth luminous catalyst Tb-Cu-PA nanoparticle that embodiment 1 prepares concentration of hydrogen peroxide side in measuring solution The application in face:
The Tb-Cu-PA adding 20 μ L in the HAc-NaAc buffer (10mM, pH 5.05) of 960 μ L hangs Supernatant liquid (35mg/mL) and 10 μ L ascorbic acid (200mM), mix homogeneously, then, be separately added into different volumes H2O2Solution (5mM) and ultra-pure water are in above-mentioned mixed liquor so that H2O2Final concentration be respectively 0,1,100, 240,360 and 500 μMs.After these mixed solutions at room temperature react 20min, 310nm excite lower mensuration it Fluorescence spectrum, it is thus achieved that the working curve of fluorescence intensity and concentration of hydrogen peroxide, shoot under 302nm uviol lamp and contain There is the fluorescence color figure of variable concentrations hydrogenperoxide steam generator.
The Tb-Cu-PA adding 20 μ L in the HAc-NaAc buffer (10mM, pH 5.05) of 960 μ L hangs Supernatant liquid (35mg/mL) and 10 μ L ascorbic acid (200mM), mix homogeneously, then, add 10 μ L liquid to be measured, After mixing 10 minutes, under uviol lamp, observe the fluorescence color of mixed liquor, with the fluorescence face of the hydrogen peroxide of concentration known Chromatic graph compares, and i.e. can obtain the content of hydrogen peroxide in this solution to be measured;Or with spectrofluorophotometer at delay mode Lower mensuration solution is in the terbium ion fluorescence intensity of 545nm, according to the work of terbium ion fluorescence intensity Yu concentration of hydrogen peroxide Curve chart records the content of hydrogen peroxide in this solution to be measured.
Fig. 3 is fluorescence intensity and the working curve diagram of concentration of hydrogen peroxide in solution of Tb-Cu-PA, from the figure 3, it may be seen that In solution, the concentration of hydrogen peroxide and terbium ion fluorescence intensity are good linear proportional relation.Experiment shows that this catalyst exists Not by common zwitterion and the interference of coexisting substances (sugar, carbamide, aminoacid) during concentration of hydrogen peroxide in mensuration solution.
Embodiment 4
The rare earth luminous catalyst Tb-Cu-PA nanoparticle that embodiment 1 prepares ascorbic acid concentrations side in measuring solution The application in face:
The Tb-Cu-PA adding 20 μ L in the HAc-NaAc buffer (10mM, pH 5.05) of 960 μ L hangs Supernatant liquid (35mg/mL) and 10 μ L hydrogen peroxide (200mM), mix homogeneously.Then, it is separately added into different volumes Ascorbic acid solution (5mM) and ultra-pure water in above-mentioned mixed liquor so that the final concentration of ascorbic acid is respectively 0, 20,250,500,700 and 1000 μMs.After these mixed solutions at room temperature react 20min, excite at 310nm Lower their fluorescence spectrum of mensuration, it is thus achieved that fluorescence intensity and the working curve of ascorbic acid concentrations, at 302nm uviol lamp Lower shooting contains the fluorescence color figure of variable concentrations ascorbic acid solution.
The Tb-Cu-PA adding 20 μ L in the HAc-NaAc buffer (10mM, pH 5.05) of 960 μ L hangs Supernatant liquid (35mg/mL) and 10 μ L hydrogen peroxide (200mM), mix homogeneously, then, add 10 μ L liquid to be measured, Under uviol lamp, observe the fluorescence color of solution, compare with the fluorescence color figure of the ascorbic acid of concentration known, The content of ascorbic acid in this solution;Or under delay mode, measure solution 545nm's with spectrofluorophotometer Terbium ion fluorescence intensity, records in this liquid to be measured according to the working curve diagram of terbium ion fluorescence intensity Yu ascorbic acid concentrations The content of ascorbic acid.
Fig. 4 is the fluorescence color figure of the ascorbic acid of variable concentrations in rare earth luminous catalyst Tb-Cu-PA instruction solution, Fig. 5 is fluorescence intensity and the working curve diagram of ascorbic acid concentrations in solution of rare earth luminous catalyst Tb-Cu-PA.
Embodiment 5
The rare earth luminous catalyst Tb-Cu-PA nanoparticle that embodiment 1 prepares concentration of hydrogen peroxide in measuring human urine The application of aspect:
The Tb-Cu-PA adding 20 μ L in the HAc-NaAc buffer (10mM, pH 5.05) of 870 μ L hangs Supernatant liquid (35mg/mL) and 10 μ L ascorbic acid (200mM), mix homogeneously, then, add 100 μ L people's urine samples (having diluted 5 times), after hybrid reaction 20min, measures solution 545 with spectrofluorophotometer under delay mode The terbium ion fluorescence intensity of nm, records in urine according to the working curve diagram of terbium ion fluorescence intensity Yu concentration of hydrogen peroxide The content of hydrogen peroxide, the results list 1 of mensuration.
Table 1 measurement result (a: meansigma methods (n=3) ± standard deviation)
Obviously, above-described embodiment is only for clearly demonstrating example of the present invention, and is not the reality to the present invention Execute the restriction of mode.For those of ordinary skill in the field, can also be made it on the basis of the above description The change of its multi-form or variation, here without also giving exhaustive to all of embodiment, these are extended out Change or variation are also among protection scope of the present invention.

Claims (4)

1. a rare earth luminous catalyst, it is characterised in that: described rare earth luminous catalyst is for for being catalyzed and showing The Porous coordination polymer nanoparticle of hydrogen oxide extent of reaction, it is led to by rare earth terbium ion, copper ion and ligand molecular thereof Cross solvent thermal reaction synthesis to prepare;Wherein, described ligand molecular is M-phthalic acid.
2. the preparation method of the rare earth luminous catalyst described in a claim 1, it is characterised in that specifically include as Lower step:
Step 1, is sequentially added into rare earth terbium ion aqueous solution and copper ion in the DMF of certain volume Aqueous solution, obtains mixed solution A;While stirring the DMF solution being dissolved with M-phthalic acid is added Enter in mixed solution A, obtain mixed solution B;Wherein, in mixed solution B, rare earth terbium ion, copper ion and The mol ratio of M-phthalic acid is 1: 1: 2, and DMF is 7: 4 with the volume ratio of water;
Step 2, transfers to teflon-lined reaction after the mixed solution B of step 1 is stirred reaction a period of time In still, react 3 hours at 160 DEG C, naturally cool to room temperature, the centrifugal precipitation generated of collecting, by washing of precipitate also Dry.
3. the rare earth luminous catalyst described in a claim 1 reacts with ascorbic acid at catalyzing hydrogen peroxide and shows Application in terms of its extent of reaction.
4. the rare earth luminous catalyst described in a claim 1 is measuring hydrogen peroxide and mistake in ascorbic acid reactant liquor Application in terms of hydrogen oxide or ascorbic acid concentrations.
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