CN110302792A - A kind of carbon nanotube load NiCeOxComposite catalyst and the preparation method and application thereof - Google Patents
A kind of carbon nanotube load NiCeOxComposite catalyst and the preparation method and application thereof Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims abstract description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000002041 carbon nanotube Substances 0.000 title claims abstract description 28
- 229910021393 carbon nanotube Inorganic materials 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000002048 multi walled nanotube Substances 0.000 claims abstract description 27
- 239000002131 composite material Substances 0.000 claims abstract description 24
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000243 solution Substances 0.000 claims abstract description 11
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims abstract description 9
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000002604 ultrasonography Methods 0.000 claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 5
- 230000020477 pH reduction Effects 0.000 claims abstract description 5
- 150000001298 alcohols Chemical class 0.000 claims abstract description 4
- 239000007864 aqueous solution Substances 0.000 claims abstract description 4
- 125000001967 indiganyl group Chemical group [H][In]([H])[*] 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 238000001291 vacuum drying Methods 0.000 claims abstract description 4
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Chemical compound OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 28
- 230000002255 enzymatic effect Effects 0.000 claims description 8
- 230000005518 electrochemistry Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 5
- 238000011017 operating method Methods 0.000 abstract description 2
- 239000008103 glucose Substances 0.000 description 25
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- 241000219095 Vitis Species 0.000 description 6
- 235000009754 Vitis X bourquina Nutrition 0.000 description 6
- 235000012333 Vitis X labruscana Nutrition 0.000 description 6
- 235000014787 Vitis vinifera Nutrition 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 102000004190 Enzymes Human genes 0.000 description 5
- 108090000790 Enzymes Proteins 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 3
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 3
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 3
- 238000000970 chrono-amperometry Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000000835 electrochemical detection Methods 0.000 description 3
- 239000002105 nanoparticle Substances 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 229910000314 transition metal oxide Inorganic materials 0.000 description 3
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000002484 cyclic voltammetry Methods 0.000 description 2
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000002114 nanocomposite Substances 0.000 description 2
- 210000002966 serum Anatomy 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- ODKSFYDXXFIFQN-BYPYZUCNSA-N L-arginine Chemical compound OC(=O)[C@@H](N)CCCN=C(N)N ODKSFYDXXFIFQN-BYPYZUCNSA-N 0.000 description 1
- 229930064664 L-arginine Natural products 0.000 description 1
- 235000014852 L-arginine Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(II,III) oxide Inorganic materials [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229960003638 dopamine Drugs 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 229960002163 hydrogen peroxide Drugs 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002135 nanosheet Substances 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229960002668 sodium chloride Drugs 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 229910003145 α-Fe2O3 Inorganic materials 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/83—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with rare earths or actinides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
- B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/33—Electric or magnetic properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/391—Physical properties of the active metal ingredient
- B01J35/393—Metal or metal oxide crystallite size
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/396—Distribution of the active metal ingredient
- B01J35/399—Distribution of the active metal ingredient homogeneously throughout the support particle
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
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Abstract
The invention discloses a kind of carbon nanotubes to carry NiCeOxComposite catalyst and the preparation method and application thereof, the described method includes: 1) multi-walled carbon nanotube of 10 mg acidification is added in the crucible equipped with 5 mL dehydrated alcohols, the aqueous solution of 0.1 M cerous nitrate and 0.1 M nickel nitrate is added in ultrasound under room temperature after 15 minutes, and the atomic ratio for controlling Ni and Ce in the cerous nitrate and nickel nitrate solution of addition is Ni:Ce=1:0.33-3,60 DEG C of vacuum drying after continuing ultrasound and being evaporated liquid；2) the dried for standby sample that step 1) prepares is put into tube furnace, in N2/H2In mixed atmosphere, wherein H2Percent by volume be 10%, react -7 hours 0.5 hour at 100 DEG C -500 DEG C, can be prepared by carbon nanotube load NiCeOxComposite catalyst.This method and process is simple, operating procedure is few, mild condition is controllable, and the excellent electrochemical performance of obtained material has a good application prospect.
Description
Technical field
The present invention relates to electro-catalysis and electrochemical glucose sensory field, specifically a kind of carbon nanotube carries NiCeOxIt is compound
Material catalyst and the preparation method and application thereof.
Background technique
In the electrochemical sensing field of glucose, enzyme based sensor has the advantages that selectivity height and quick response, but
Simultaneously there is also an apparent defect, i.e., enzyme vulnerable to the factors such as environment influence and inactivate, to influence the inspection of glucose
It surveys, therefore, develops sensitive, efficient non-enzymatic glucose sensor and be subject to the people's attention.Currently, metal oxide, especially
It is the building that transition metal oxide is widely used in non-enzymatic glucose sensor, this is because the gold of transition metal oxide
Belong to atom and be generally in intermediate valence state, is easier receiving and losing electrons in electrochemical environment and redox reaction occurs, show
Excellent electrocatalysis characteristic.However, different metal oxides its crystal structure, form, electronic conductivity and electrocatalysis characteristic
Different, leading to the sensor performance constructed by these oxides also has very big difference.
In numerous transition metal oxides, the electrocatalysis characteristic of NiO is excellent, and has very high sensitivity and stabilization
Property, it is the glycoxidative good catalyst of grape.In order to enhance the synergistic effect between catalyst heterogeneity and further increase
Its electrocatalysis characteristic, people attempt that another transition metal is added on the basis of nickel oxide and obtains Ni-based bimetallic oxygen again
Compound composite material.In recent years, synthesis in relation to Ni-based bimetallic oxide composite material and its in glucose electrochemical sensing
The application study document report of aspect is few, relates generally to following several document reports: (1) " Journal of in 2019
Electroanalytical Chemistry " report Co3O4The synthesis of-NiO nanoneedle is simultaneously used for Electrochemical Detection Portugal
Grape sugar；" Microchimica Acta " reports CuO within (2) 2019 yearsx/NiOyThe synthesis of hollow Nano composite material is used in combination
In glucose and H2O2Non-enzymatic Electrochemical Detection；(3) 2018 years " Applied Catalysis, B:Environmental "
Report p-NiO/n- α-Fe2O3The synthesis of heterojunction structure simultaneously is used to construct high performance glucose sensor；(4) 2017 years
" Journal of Alloys and Compounds " reports the conjunction that three-dimensional macropore carbon carries ZnO-NiO nanosheet composite material
At and be used for the Electrochemical Detection of glucose；" RSC Advances " reports flower-shape Ni O-SnO within (5) 2017 years2Nanometer
The non-enzymatic glucose sensing platform of composite material building；(6) 2016 years " International Journal of
Electrochemical Science " report reduced graphene oxide serving load NiO/CuO nanocomposite and its to grape
The non-enzymatic electrochemical sensing performance of sugar.But the related hydrogen co-reducing process that passes through prepares carbon nanotube load NiCeOxComposite material
Catalyst is simultaneously applied to the research of glucose non-enzymatic electrochemical sensing there is not yet document and patent report.
Summary of the invention
The purpose of the present invention is in view of the deficiencies of the prior art, and a kind of carbon nanotube is provided and carries NiCeOxComposite material is urged
Agent and preparation method thereof and its application in the non-enzymatic electrochemical sensing of glucose.This method and process is simple, operation walks
Suddenly less, mild condition it is controllable, the excellent electrochemical performance of obtained material has a good application prospect.
Realizing the technical solution of the object of the invention is:
A kind of carbon nanotube load NiCeOxThe preparation method of composite catalyst, points unlike the prior art are, including such as
Lower step:
1) multi-walled carbon nanotube of 10 mg acidification is added in the crucible equipped with 5 mL dehydrated alcohols, ultrasound 15 minutes under room temperature
The aqueous solution of 0.1 M cerous nitrate and 0.1 M nickel nitrate is added afterwards, and controls Ni and Ce in the cerous nitrate and nickel nitrate solution of addition
Atomic ratio be Ni:Ce=1:0.33-3,60 DEG C of vacuum drying are stand-by after continuing ultrasound and being evaporated liquid；
2) the dried for standby sample that step 1) prepares is put into tube furnace, in N2/H2In mixed atmosphere, wherein H2Volume
Percentage is 10%, is reacted -7 hours 0.5 hour at 100 DEG C -500 DEG C, can be prepared by carbon nanotube and carries NiCeOxComposite material
Catalyst, that is, NiCeOx/MWCNTs。
The carbon nanotube made from above-mentioned preparation method carries NiCeOxComposite catalyst, that is, NiCeOx/MWCNTs。
The carbon nanotube made from above-mentioned preparation method carries NiCeOxComposite catalyst, that is, NiCeOx/ MWCNTs is non-
Application in enzyme electrochemical glucose sensing.
Current Ni-based bimetallic oxide composite material reported in the literature mostly uses hydro-thermal method to prepare greatly, complex technical process
And take a long time, in the technical program, after the mixing suspension ultrasound of nickel nitrate, cerous nitrate and acidification carbon nanotube is evaporated, lead to
Crossing hydrogen co-reducing process can be prepared by carbon nanotube load NiCeOxComposite catalyst, this method technical process are simple easily real
It applies, hence it is evident that improve NiCeOxThe dispersion degree of nano particle and the electrocatalysis characteristic glycoxidative to grape.
The technical program deposits NiCeO on its surface by hydrogen co-reducing process to be acidified carbon nanotube as carrierxNanometer
Particle.
For the technical program to be acidified carbon nanotube as carrier, the carbon nanotube as made from hydrogen co-reducing process carries NiCeOx
In composite catalyst, the bimetallic oxide nano particle of Ni and Ce are evenly dispersed in carbon nano tube surface, hence it is evident that increase
Its strong electro catalytic activity glycoxidative to grape, the non-enzymatic electrochemical glucose sensing based on composite catalyst building
Device has wide high sensitivity, the range of linearity, the low and reproducibility of detection limit, stability and interference free performance to the detection of glucose
The advantages that good.
This method and process is simple, operating procedure is few, mild condition is controllable, the excellent electrochemical performance of obtained material,
It has a good application prospect.
Detailed description of the invention
Fig. 1 is that preparation carbon nanotube carries NiCeO in embodimentxThe flow diagram of catalyst；
Fig. 2 is that the carbon nanotube prepared in embodiment carries NiCeOxThe TEM of catalyst schemes；
Fig. 3 is that the carbon nanotube prepared in embodiment carries NiCeOxThe partial size statistical chart of catalyst；
Fig. 4 is the NiCeO prepared in embodimentx/ MWCNTs, NiO/MWCNTs and CeO2/ MWCNTs catalyst is containing 2 Portugals mM
Cyclic voltammetry curve figure in 0.1 M NaOH solution of grape sugar.
Specific embodiment
The contents of the present invention are further elaborated with reference to the accompanying drawings and examples, but are not to limit of the invention
It is fixed.
Embodiment:
Referring to Fig.1, a kind of carbon nanotube carries NiCeOxThe preparation method of composite catalyst, includes the following steps:
1) multi-walled carbon nanotube of 10 mg acidification is added in the crucible equipped with 5 mL dehydrated alcohols, ultrasound 15 minutes under room temperature
The aqueous solution of 0.1 M cerous nitrate and 0.1 M nickel nitrate is added afterwards, and controls Ni and Ce in the cerous nitrate and nickel nitrate solution of addition
Atomic ratio be Ni:Ce=1:0.33-3,60 DEG C of vacuum drying are stand-by after continuing ultrasound and being evaporated liquid；
2) the dried for standby sample that step 1) prepares is put into tube furnace, in N2/H2In mixed atmosphere, wherein H2Volume
Percentage is 10%, is reacted -7 hours 0.5 hour at 100 DEG C -500 DEG C, can be prepared by carbon nanotube and carries NiCeOxComposite material
Catalyst, that is, NiCeOx/MWCNTs。
The carbon nanotube made from above-mentioned preparation method carries NiCeOxComposite catalyst, that is, NiCeOx/MWCNTs。
The carbon nanotube made from above-mentioned preparation method carries NiCeOxComposite catalyst, that is, NiCeOx/ MWCNTs is non-
Application in enzyme electrochemical glucose sensing.
In order to be compared, this example is also prepared for CeO under the same conditions2/ MWCNTs and NiO/MWCNTs catalyst.
Tem analysis shows according to NiCeO in catalyst prepared by the example methodxNano particle is uniform on MWCNTs
Distribution, average grain diameter are 4.08 nm, and as shown in Figures 2 and 3, NiCeO prepared by this example is set forth in Fig. 2 and Fig. 3x/
The TEM figure and partial size statistical Butut of MWCNTs catalyst.
NiCeO prepared by this example is compared by cyclic voltammetryx/ MWCNTs, NiO/MWCNTs and CeO2/MWCNTs
Catalyst electrocatalysis characteristic glycoxidative to grape in the 0.1 M NaOH solution containing 2 mM glucose, the results showed that, CeO2/
MWCNTs is glycoxidative to grape almost without activity, and NiCeOx/ MWCNTs goes out highest electro-catalysis to glucose oxidation performance
Activity, as shown in figure 4, Fig. 4 gives cyclic voltammetric of the different catalysts in the 0.1 M NaOH solution containing 2 mM glucose
Curve graph.
The glucose solution for being continuously added to various concentration in 0.1 M NaOH solution by chronoamperometry, which measures, to be based on
NiCeOxAs a result the non-enzyme sensor of/MWCNTs catalyst building points out, the sensor pair the ampere response curve of glucose
The detection of glucose has high sensitivity (315.64 μ A mM-1 cm-2), the range of linearity it is wide by (3.21 × 10-2~ 2.12 mM) and
Detection limits the features such as low (9.5 μ Μ, S/N=3), in addition, also testing institute in 0.1 M NaOH solution by chronoamperometry
The interference free performance of sensor is prepared, the results show that L-arginine, hydrogen peroxide, ascorbic acid, dopamine, sodium chloride and urine
The common interferences such as acid substance has not significant impact the detection of glucose.
The concentration of glucose in practical blood serum sample is detected by chronoamperometry, three blood serum samples of gained
Concentration of glucose test result is close with the true value that hospital provides, and relative standard deviation is respectively 1.4%, 2.26% and 2.53%,
The rate of recovery is respectively 100.8%, 101.4% and 99.6%, and instruction this example is based on NiCeOxThe sensor of/MWCNTs catalyst building
It is as a result satisfactory for the detection high reliablity of actual sample.
Claims (3)
1. a kind of carbon nanotube carries NiCeOxThe preparation method of composite catalyst, which comprises the steps of:
1) multi-walled carbon nanotube of 10 mg acidification is added in the crucible equipped with 5 mL dehydrated alcohols, ultrasound 15 minutes under room temperature
The aqueous solution of 0.1 M cerous nitrate and 0.1 M nickel nitrate is added afterwards, and controls Ni and Ce in the cerous nitrate and nickel nitrate solution of addition
Atomic ratio be Ni:Ce=1:0.33-3,60 DEG C of vacuum drying are stand-by after continuing ultrasound and being evaporated liquid；
2) the dried for standby sample that step 1) prepares is put into tube furnace, in N2/H2In mixed atmosphere, wherein H2Volume
Percentage is 10%, is reacted -7 hours 0.5 hour at 100 DEG C -500 DEG C, can be prepared by carbon nanotube and carries NiCeOxComposite material
Catalyst, that is, NiCeOx/MWCNTs。
2. carbon nanotube made from the preparation method described in claim 1 carries NiCeOxComposite catalyst, that is, NiCeOx/
MWCNTs。
3. carbon nanotube described in claim 2 carries NiCeOxComposite catalyst, that is, NiCeOx/ MWCNTs is in non-enzymatic electrochemistry Portugal
Application in grape sugar sensing.
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| CN105424774A (en) * | 2015-10-23 | 2016-03-23 | 西北大学 | Enzyme-free glucose electrochemical sensor electrode and preparation method and application thereof |
| CN105866208A (en) * | 2016-05-31 | 2016-08-17 | 合肥工业大学 | CeO2 @CNT core-shell nanowire array and preparation method and application thereof |
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