CN113433187A - LaMnO3Electrochemical sensor of chitosan non-enzymatic hydrogen peroxide and preparation method thereof - Google Patents

LaMnO3Electrochemical sensor of chitosan non-enzymatic hydrogen peroxide and preparation method thereof Download PDF

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CN113433187A
CN113433187A CN202110747891.7A CN202110747891A CN113433187A CN 113433187 A CN113433187 A CN 113433187A CN 202110747891 A CN202110747891 A CN 202110747891A CN 113433187 A CN113433187 A CN 113433187A
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lamno
chitosan
electrochemical sensor
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谢爱娟
王浩业
王庆
陈端贵
魏建鸿
杨涢
任依涵
罗士平
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Changzhou University
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    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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Abstract

The invention belongs to the technical field of functional materials and electrochemistry, and particularly relates to LaMnO3A chitosan non-enzymatic hydrogen peroxide electrochemical sensor and a preparation method thereof. The invention synthesizes perovskite LaMnO by a sol-gel method3Then synthesizing LaMnO by chemical coprecipitation method3Chitosan and its application in non-enzymatic H2O2And (5) testing the performance of the electrochemical sensor. LaMnO related to the invention3Chitosan, in 0.1M NaOH solution, modifying H on GCE electrode with anhydrous alcohol and deionized water as dispersant2O2The detection response is best, and the stability is good; LaMnO3Chitosan is compared with LaMnO3Has better detection response effect. In conclusion, the LaMnO prepared by the invention3The chitosan composite material provides a new material in the field of food and drug detectionHas good performance of non-enzymatic electrochemical sensors.

Description

LaMnO3Electrochemical sensor of chitosan non-enzymatic hydrogen peroxide and preparation method thereof
Technical Field
The invention belongs to the technical field of functional materials and electrochemistry, and particularly relates to LaMnO3A chitosan non-enzymatic hydrogen peroxide electrochemical sensor and a preparation method thereof.
Background
With the development of science and technology, various electrochemical sensors with excellent performance are researched, and great convenience is brought to daily life. Among these, electrode materials are key components of electrochemical sensors, which are currently mainly used for the determination of analytes in various fields of application. The electrode material must have mixed electron-ion conductivity as well as electrocatalytic activity. In addition, they also need to have high surface area and high stability. In order to meet these requirements at the same time, it is often a good way to modify the electrode by adding suitable composite materials, which can optimize the electrochemical characteristics of the electrode depending on the type and structure of the sensitive material and the analyte to be detected.
Hydrogen peroxide (H)2O2) Are the products of several biological and enzymatic reactions, which are used as oxidants in many different fields. H2O2The development of analysis technology is promoted by the large-scale use of the method, so that the determination has high sensitivity, low detection limit and quick and accurate response. Among them, the electroanalytical method is most convenient H2O2And (3) a measuring method. Most hydrogen peroxide electrochemical sensors employ sensitive materials functionalized with an enzyme layer. However, for certain applications, the utility of enzyme-based sensors is limited by anticipated drawbacks arising from the nature of the enzyme, including chemical and thermal instability, short lifetime, and the complex processes required to achieve enzyme immobilization. To overcome these disadvantages, many sensitive inorganic materials have been proposed for detecting H2O2. In particular, the unique electronic and transport properties of sensitive materials with perovskite structures, and their unique ability to accommodate ions of different sizes through distorted phase transitions, motivate their electrochemical sensing at high temperaturesAnd applications in electrodes for solid oxide fuel cells. Furthermore, it is well known that some perovskite oxides show significant catalytic activity for electrochemical oxygen reduction, indicating that they are active in H2O2Potentially with promising performance in electroreduction. Perovskite type oxides as H2O2The electrochemical sensor has the defects of high detection potential, poor sensitivity or unsatisfactory detection limit, and the like, so that the application of the electrochemical sensor is limited.
Chitosan (Chitosan), also known as chitin and Chitosan, is a very valuable natural polymer with relative molecular weights varying widely from hundreds of thousands to millions, but all belonging to linear polysaccharide compounds, known by the scientific name β - (1-4) -2-deoxy-D-glucose. Chitosan is an N-deacetylation product of chitin, the N-deacetylation degree of which is generally more than 55%, the chitosan can be dissolved in 1% acetic acid or hydrochloric acid, the appearance is white, off-white and slightly pearly, and the chitosan is a semitransparent flaky solid. Because the molecular chain contains a large amount of hydroxyl (-OH) and amino (-NH)2) Has good adsorption chelation, has the advantages of no toxicity, biodegradability, biocompatibility, biological adhesion and the like, and is an ideal biological adsorbent. Because the chitosan has wide application, and the raw materials are rich and easy to obtain, the chitosan is known as 21 st century plastic. At present, the application of chitosan in electrochemical sensors is also widely reported, and as a low-cost carbonaceous material, chitosan has excellent conductivity and stability, higher porosity and larger surface area, and can load more substances to a great extent and improve performance by using the chitosan as a support material. However, hydrogen bonds are widely formed between molecular chains and inside the molecular chains, so that the adsorption effect is limited, and the catalytic performance is influenced. In order to improve the performance, the modified polymer is generally blended with other polymers or inorganic substances to improve the performance.
Disclosure of Invention
The invention provides a LaMnO based on the technical problems pointed out in the background technology section3A chitosan non-enzymatic hydrogen peroxide electrochemical sensor and a preparation method thereof.
The invention relates to LaMnO3The preparation method of the chitosan comprises the following specific steps:
(1) 0.01mol of lanthanum nitrate and 0.01mol of manganese acetate are weighed into a 250mL beaker, and 100mL of ethanol is added to be stirred for 30min to obtain a uniform solution. Weighing the complexing agent, citric acid monohydrate and the dispersant, namely polyethylene glycol 400, into a 100mL beaker, adding ethanol, and stirring for 30 min. Wherein the molar ratio of the citric acid to the total metal ions is 2: 1-1: 1.
Quickly stirring ethanol solutions of a complexing agent and a dispersing agent, slowly pouring the ethanol solutions into ethanol solutions of lanthanum nitrate and manganese acetate, mixing the two solutions, stirring for 1h, transferring into a constant-temperature water bath, standing for 1h at a constant temperature of 60 ℃ to obtain sol, adjusting the temperature of the constant-temperature water bath to 70 ℃, heating for 1h to obtain gel, continuing to keep the temperature of the obtained wet gel at 70 ℃ for 12h, transferring into a 60 ℃ drying oven, and drying until the wet gel becomes dry gel; taking out the obtained xerogel and placing the xerogel in a crucible, placing the crucible on an iron furnace, setting the temperature to be 200 ℃, burning off organic matters in the crucible, grinding the obtained substances in a mortar into powder, placing the powder in the crucible, placing the crucible in a muffle furnace at 700 ℃ for 6 hours, cooling, taking out, grinding again, grinding the powder to be finer as much as possible, and sieving to obtain lanthanum manganate (LaMnO)3) And (3) sampling.
(2) Weighing chitosan in 250mL beaker, adding 100mL 5% acetic acid solution, stirring at room temperature for 2 hr to dissolve chitosan, weighing LaMnO3Adding the powder into a beaker, performing ultrasonic treatment at room temperature for 30min, adding a NaOH solution to enable the pH value to be 7, sequentially adding absolute ethyl alcohol and a 25% glutaraldehyde solution, and reacting for 10-16 h. After washing and filtering, transferring the product into a culture dish, and baking for 4 hours in an oven at the temperature of 60 ℃ to obtain LaMnO3Chitosan is used as the active ingredient.
Wherein m (LaMnO)3) M (chitosan) is 6:1 to 1: 1.
V (absolute ethanol): V (25% glutaraldehyde) ═ 3:1 to 1: 3.
The obtained LaMnO is obtained by the preparation3Application of chitosan in preparation and detection of H2O2The electrochemical sensor of (1).
For detecting H2O2Preparation of electrochemical sensorThe preparation method comprises the following steps: weighing LaMnO3Pouring chitosan into a round-bottom centrifuge tube, injecting deionized water and absolute ethyl alcohol into the tube, ultrasonically dispersing to uniformly disperse the chitosan to obtain a suspension, transferring the suspension by using a liquid transfer gun, and dropwise coating the suspension on the surface of the treated glassy carbon electrode to obtain LaMnO3A chitosan non-enzymatic electrochemical sensor.
Wherein, LaMnO3The concentration of chitosan in the deionized water and absolute ethyl alcohol suspension is 5g/L, and the dropping amount of the suspension is 5 mu L.
The specific application method of the electrochemical sensor prepared by the method comprises the following steps: mixing LaMnO3The chitosan non-enzymatic electrochemical sensor adopts Differential Pulse Voltammetry (DPV) to detect H in electrolyte of 0.10M NaOH2O2And (5) responding to the effect.
The invention has the beneficial effects that:
LaMnO prepared by adopting the method3Chitosan, in 0.1M NaOH solution, modifying H on GCE electrode with anhydrous alcohol and deionized water as dispersant2O2The detection response is best, and the stability is good; LaMnO3Chitosan is compared with LaMnO3Has better detection response effect.
Drawings
FIG. 1 shows LaMnO in example 13XRD pattern of the/chitosan composite material.
FIG. 2 shows LaMnO in example 13FTIR patterns of the/chitosan composite.
FIG. 3 shows LaMnO in example 13The chitosan modified electrode is in 0.10M NaOH electrolyte with or without H2O2DPV response plot under the system (a).
FIG. 4 shows LaMnO in example 13Chitosan modified electrode in K [ Fe (CN)6]EIS diagram in the electrolyte solution (1).
FIG. 5 shows LaMnO in example 13Chitosan and LaMnO3Modified electrode in 0.10M NaOH electrolyte for H2O2DPV response graph of (a).
FIG. 6 is prepared from different raw materials in mass ratios in examples 1 and 2LaMnO3The chitosan modified electrode is used for H in electrolyte of 0.10M NaOH2O2DPV response graph of (a).
FIG. 7 shows LaMnO prepared by different volume ratios of absolute ethanol to glutaraldehyde as a crosslinking agent in examples 1 and 33The chitosan modified electrode is used for H in electrolyte of 0.10M NaOH2O2DPV response graph of (a).
FIG. 8 shows LaMnO in example 1 and comparative example 13The chitosan modified electrode is respectively in 0.10M NaOH electrolyte and 0.10M H2SO4Electrolyte and PBS (pH 7) buffer, for H2O2DPV response graph of (a).
FIG. 9 shows LaMnO in example 1 and comparative example 23Chitosan and LaFeO3Respectively modifying electrodes with chitosan in electrolyte of 0.10M NaOH for H2O2DPV response graph of (a).
Detailed Description
The invention is further illustrated by the following specific examples, which are intended to be illustrative of the invention and are not intended to be a further limitation of the invention.
Example 1:
LaMnO3The preparation of the chitosan non-enzymatic hydrogen peroxide electrochemical sensor comprises the following steps:
(1) 0.01mol of lanthanum nitrate 4.33g and 0.01mol of manganese acetate 2.68g are weighed into a 250mL beaker, and 100mL of ethanol is added and stirred for 30min to obtain a uniform solution. 0.03mol of complexing agent monohydrate citric acid and 6g of dispersant polyethylene glycol 400 are weighed into a 100mL beaker, 50mL of ethanol is added, and stirring is carried out for 30 min. The two beakers need to be stirred simultaneously, the stirring speed is gradually increased from low to stable.
When the substances in the 250mL beaker are completely dissolved and the solution is clear, slowly pouring the solution in the 100mL beaker while rapidly stirring the 250mL beaker, mixing the two solutions, stirring for 1h, standing in a constant-temperature water bath at the constant temperature of 60 ℃ for 1h to obtain sol, adjusting the temperature of the constant-temperature water bath to 70 ℃, then gelling the sol at 70 ℃ for 1h, keeping the temperature of the obtained wet gel constant at 70 ℃ for 12h, and then transferring the wet gel to a 60 ℃ oven for hot drying until the wet gel becomes the gelTaking the obtained dried gel out of a crucible, placing the crucible on an iron furnace, setting the temperature to be 200 ℃, burning the organic matters of the dried gel at the temperature of about 200 ℃, grinding the obtained substances into powder in a mortar, placing the powder in the crucible, placing the powder in a muffle furnace at the temperature of 700 ℃, cooling the powder after 6 hours, taking out the powder, grinding the powder once again, grinding the powder to be finer as much as possible, and sieving the powder to obtain lanthanum manganate (LaMnO)3) And (3) sampling.
(2) Weighing 0.0200g of chitosan in 250mL beaker, adding 100mL of 5% acetic acid solution, stirring at room temperature for 2h to dissolve chitosan, weighing 0.0800g of LaMnO3Adding the powder into a beaker, performing ultrasonic treatment at room temperature for 30min, adding 44mL of NaOH solution to adjust the pH value to 7, sequentially adding 25mL of absolute ethyl alcohol and 25mL of 25% glutaraldehyde solution, and reacting for 16 h. After washing and filtering, transferring the product into a culture dish, and baking for 4 hours in an oven at the temperature of 60 ℃ to obtain LaMnO3Chitosan is used as the active ingredient.
FIG. 1 shows the prepared LaMnO3Chitosan and LaMnO3The wide-angle XRD pattern of the chitosan composite material. The three characteristics of the chitosan used in this study at 10.3 °, 20.1 °, 29.4 ° are clearly seen in the figure. The characteristic peaks of chitosan are the steamed bun bulge peak appearing at about 20 degrees and the characteristic peak appearing at about 30 degrees in the XRD pattern of the composite material. LaMnO prepared by adopting sol-gel method3In the vicinity of 22.88 °, 25.88 °, 32.64 °, 40.2 °, 46.74 °, 52.7 °, 58.28 °, 68.76 °, 77.74 ° of 2 θ, a distinct X-ray diffraction peak appears, which corresponds exactly to the diffraction peak for the (110), (111), (200), (202), (220), (222), (024), (224), (332) crystal plane, which is LaMnO3Characteristic diffraction peak of (1). LaMnO in composite material3All the characteristic diffraction peaks can be in one-to-one correspondence, which shows that LaMnO is3Successful synthesis of chitosan. In addition, the chitosan steamed bread peak in the graph is not obvious mainly due to LaMnO3The peak intensity of the nano powder is too strong.
FIG. 2 shows the prepared LaMnO3Chitosan and LaMnO3FTIR spectra of the/chitosan composite. There are three absorption bands on the composite curve, of which there are at 3413cm-1The absorption band is generated by the O-H stretching vibration of chitosanAnd (4) causing. Is positioned at 1080cm-1Is attributed to Mn-O tensile vibration and is 617.1cm-1The absorption peak at (A) belongs to the La-O tensile vibration, which confirms that LaMnO3Successful synthesis of chitosan.
(3) Weighing 5mg LaMnO3Chitosan and LaMnO3Pouring the materials into two 2mL round-bottom centrifuge tubes respectively, adding 500 μ L deionized water and 500 μ L anhydrous ethanol into the tubes respectively, ultrasonically dispersing for 15min to obtain suspension, transferring 5 μ L suspension with a liquid transfer gun, and dropwise coating on the surface of the treated glassy carbon electrode to obtain LaMnO3Chitosan and LaMnO3And the electrochemical sensor is placed under the irradiation of an infrared lamp and dried for later use.
Prepared LaMnO3Chitosan electrochemical sensor using Differential Pulse Voltammetry (DPV) for H detection in 0.10M NaOH electrolyte2O2And (5) responding to the effect. FIG. 3 shows LaMnO3A DPV scan of a chitosan electrochemical sensor in 0.10M NaOH electrolyte at a sweep rate of 500 mV/s. By contrast, it can be observed that in the presence of H2O2Under the system LaMnO3Electrode peak current ratio modified by chitosan without H2O2Is increased under the condition of (1), and H2O2An oxidation peak appears around-0.45V, and the peak current increases most significantly. This indicates the good adsorption capacity of chitosan and LaMnO3The electrocatalysis capability is combined, the electron transfer rate on the modified electrode is improved to a greater extent, and the surface of the modified electrode is close to an ideal working state.
FIG. 4 shows LaMnO3Chitosan modified electrode in K [ Fe (CN)6]In the electrolyte, the sweeping speed is 50mV/s, and the potential interval is an IMP diagram of-0.1-0.6V. LaMnO can be obtained by fitting calculation3EIS diagram of the chitosan composite material, wherein the Rct value is 257 Ω. This indicates that LaMnO3The chitosan composite material has excellent electrochemical performance.
Prepared LaMnO3Chitosan and LaMnO3Electrochemical sensor for detecting H in electrolyte of 0.10M NaOH by DPV detection method2O2Response effectWherein the sweep rate is 500mV/s, and the potential range is-0.7 to 0.1V. The test result shows that LaMnO is3The electrochemical performance of chitosan is obviously superior to LaMnO3(FIG. 5). Illustrating the LaMnO prepared by the present invention3Chitosan non-enzyme electrochemical sensor in H pair2O2In comparison with LaMnO3Has strong detection effect.
Example 2:
this example differs from example 1 in that: LaMnO in step (2)3The mass ratio of chitosan to chitosan was 6:1 (i.e., 0.1200g LaMnO)3Powder and 0.0200g chitosan) and 1:1 (i.e. 0.0200g LaMnO)3Powder and 0.0200g of chitosan), the other conditions were the same as in example 1. The test result shows that when the mass ratio of the raw materials is 4: 1 and 6:1 prepared LaMnO3Chitosan non-enzymatic electrochemical sensor in H2O2In the detection, the response effect is equivalent, compared with the LaMnO prepared by the raw materials with the mass ratio of 1:13The electrochemical performance of the chitosan non-enzymatic electrochemical sensor is better (figure (6)).
Example 3:
this example differs from example 1 in that: the volume ratio of absolute ethanol to 25% glutaraldehyde in step (2) was 3:1 (i.e., 75mL of absolute ethanol and 25mL of 25% glutaraldehyde solution) and 1:3 (i.e., 25mL of absolute ethanol and 75mL of 25% glutaraldehyde solution), and the rest of the conditions were the same as in example 1. The test result shows that the LaMnO prepared when the volume ratio of the absolute ethyl alcohol to the 25 percent glutaraldehyde is 1:13Chitosan non-enzymatic electrochemical sensor in H2O2In the detection, compared with the LaMnO prepared by the raw materials with the mass ratio of 3:1 and 1:3, the method has the advantages that3The electrochemical performance of the chitosan non-enzymatic electrochemical sensor is better (figure (7)).
Comparative example 1:
this example differs from example 1 in that: prepared LaMnO3Chitosan electrochemical sensor, using Differential Pulse Voltammetry (DPV) detection at 0.1M H2SO4And H in a buffer solution of PBS (pH 7)2O2And (5) responding to the effect. The test result shows that H is detected in the electrolyte of NaOH2O2The response effect is the best (fig. 8).
Comparative example 2:
the difference between this example and example 1 is: the raw materials in step (1) are ferric nitrate and lanthanum nitrate, and the rest conditions are the same as those in example 1. The test results show that LaMnO prepared under the conditions of example 13Chitosan non-enzymatic electrochemical sensor in H2O2In comparison with LaFeO3The chitosan non-enzyme electrochemical sensor has stronger detection effect. (FIG. 9).

Claims (8)

1. For detecting H2O2The method for preparing an electrochemical sensor according to (1), wherein the method comprises: weighing LaMnO3Pouring chitosan into a round-bottom centrifuge tube, injecting deionized water and absolute ethyl alcohol into the tube, ultrasonically dispersing to uniformly disperse the chitosan to obtain a suspension, transferring the suspension by using a liquid transfer gun, and dropwise coating the suspension on the surface of the treated glassy carbon electrode to obtain LaMnO3A chitosan non-enzymatic electrochemical sensor.
2. The method of claim 1 for detecting H2O2The method for preparing an electrochemical sensor of (1), wherein the LaMnO is3The preparation method of the chitosan comprises the following steps:
(1) weighing lanthanum nitrate and manganese acetate in a beaker, adding ethanol, stirring to form a uniform solution, weighing complexing agent monohydrate citric acid and dispersant polyethylene glycol in the beaker, adding ethanol, stirring for 1h, transferring to a constant-temperature water bath, standing at a constant temperature of 60 ℃ for 1h to obtain sol, adjusting the temperature of the constant-temperature water bath to 70 ℃, obtaining gel after 1h, continuing to keep the temperature of the obtained wet gel at 70 ℃ for 12h, transferring to a 60 ℃ oven, drying until the wet gel becomes dry gel, taking the obtained dry gel out of the crucible, placing the crucible on an iron furnace, setting the temperature to be 200 ℃, burning off organic matters, grinding the obtained substances in a mortar into powder, placing the powder in the crucible, placing the crucible in a muffle furnace, cooling after 6h, taking out, grinding again, and sieving to obtain lanthanum manganate (LaMnO)3) A sample;
(2) weighing chitosan, adding 5% acetic acid solution, stirring at room temperature for 2 hr to dissolve chitosan, and weighing LaMnO3Adding the powder into a beaker, performing ultrasonic treatment at room temperature, adding NaOH solution to enable the pH value to be 7, sequentially adding absolute ethyl alcohol and 25% glutaraldehyde solution, reacting for 10-16 h, washing and filtering, transferring the product into a culture dish, and baking for 4h at 60 ℃ in an oven to obtain LaMnO3Chitosan is used as the active ingredient.
3. The method of claim 2 for detecting H2O2The preparation method of the electrochemical sensor is characterized in that in the step (1), the molar ratio of lanthanum nitrate to manganese acetate is 1:1, and the molar ratio of the complexing agent monohydrate citric acid to the total metal ions is 2: 1-1: 1.
4. The method of claim 2 for detecting H2O2The method for producing an electrochemical sensor of (1), wherein m (LaMnO) in the step (2)3) M (chitosan) is 6:1 to 1: 1.
5. The method of claim 2 for detecting H2O2The method for manufacturing an electrochemical sensor according to (1) is characterized in that in the step (2), V (absolute ethyl alcohol): V (25% glutaraldehyde) ═ 3:1 to 1: 3.
6. The method of claim 1 for detecting H2O2The method for preparing an electrochemical sensor of (1), wherein the LaMnO is3The concentration of chitosan in deionized water and absolute ethyl alcohol suspension is 5 g/L; the amount of the suspension dropped was 5. mu.L.
7. A method for detecting H prepared according to the method of claim 12O2The electrochemical sensor of (1).
8. A method of using an electrochemical sensor prepared according to the method of claim 1, wherein the method of using is: mixing LaMnO3The chitosan non-enzymatic electrochemical sensor adopts a DPV detection method to detect H in electrolyte of 0.10M NaOH2O2And (5) responding to the effect.
CN202110747891.7A 2021-07-01 2021-07-01 LaMnO3Electrochemical sensor of chitosan non-enzymatic hydrogen peroxide and preparation method thereof Pending CN113433187A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102539510A (en) * 2012-01-11 2012-07-04 上海大学 Method for determining hydrogen peroxide by using nickel lanthanum titanate/cobalt ferrite modified glassy carbon electrode
JP2013034955A (en) * 2011-08-09 2013-02-21 Jfe Engineering Corp Method and apparatus for separating strontium
CN103149256A (en) * 2013-02-27 2013-06-12 上海大学 Electrochemical sensor prepared from SrNiFeO3-modified glassy carbon electrode and method for determining H2O2 with same
CN103936097A (en) * 2014-04-11 2014-07-23 华南理工大学 Method for degrading methyl orange by use of perovskite/polysaccharide composite photocatalyst
CN104876276A (en) * 2015-04-20 2015-09-02 河南师范大学 Preparation method of supercapacitor electrode material LaMnO3
CN107055630A (en) * 2017-03-09 2017-08-18 南京工业大学 Perovskite material 3DOM-SmCoO with three-dimensional ordered macroporous structure3And preparation method and application thereof
CN112547087A (en) * 2020-12-16 2021-03-26 北京北方节能环保有限公司 Preparation method and application of iron/lanthanum manganese oxide catalyst

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013034955A (en) * 2011-08-09 2013-02-21 Jfe Engineering Corp Method and apparatus for separating strontium
CN102539510A (en) * 2012-01-11 2012-07-04 上海大学 Method for determining hydrogen peroxide by using nickel lanthanum titanate/cobalt ferrite modified glassy carbon electrode
CN103149256A (en) * 2013-02-27 2013-06-12 上海大学 Electrochemical sensor prepared from SrNiFeO3-modified glassy carbon electrode and method for determining H2O2 with same
CN103936097A (en) * 2014-04-11 2014-07-23 华南理工大学 Method for degrading methyl orange by use of perovskite/polysaccharide composite photocatalyst
CN104876276A (en) * 2015-04-20 2015-09-02 河南师范大学 Preparation method of supercapacitor electrode material LaMnO3
CN107055630A (en) * 2017-03-09 2017-08-18 南京工业大学 Perovskite material 3DOM-SmCoO with three-dimensional ordered macroporous structure3And preparation method and application thereof
CN112547087A (en) * 2020-12-16 2021-03-26 北京北方节能环保有限公司 Preparation method and application of iron/lanthanum manganese oxide catalyst

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
何春晓;盖轲;齐慧丽;马东平;魏晓霞;: "过氧化氢传感器的研究进展", 陇东学院学报, no. 01 *

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