CN113295737A - Manganese-doped cobaltosic oxide porous nano flaky material and preparation method and application thereof - Google Patents

Manganese-doped cobaltosic oxide porous nano flaky material and preparation method and application thereof Download PDF

Info

Publication number
CN113295737A
CN113295737A CN202110536373.0A CN202110536373A CN113295737A CN 113295737 A CN113295737 A CN 113295737A CN 202110536373 A CN202110536373 A CN 202110536373A CN 113295737 A CN113295737 A CN 113295737A
Authority
CN
China
Prior art keywords
manganese
cobaltosic oxide
oxide porous
doped
doped cobaltosic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110536373.0A
Other languages
Chinese (zh)
Other versions
CN113295737B (en
Inventor
董帆
曹正茂
盛剑平
孙艳娟
李解元
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yangtze River Delta Research Institute of UESTC Huzhou
Original Assignee
Yangtze River Delta Research Institute of UESTC Huzhou
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yangtze River Delta Research Institute of UESTC Huzhou filed Critical Yangtze River Delta Research Institute of UESTC Huzhou
Priority to CN202110536373.0A priority Critical patent/CN113295737B/en
Publication of CN113295737A publication Critical patent/CN113295737A/en
Application granted granted Critical
Publication of CN113295737B publication Critical patent/CN113295737B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
    • G01N27/127—Composition of the body, e.g. the composition of its sensitive layer comprising nanoparticles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Nanotechnology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Abstract

The invention discloses a manganese-doped cobaltosic oxide porous nano flaky material as well as a preparation method and application thereof. Dissolving inorganic compound of manganese element, inorganic compound of cobalt element and hexamethylenetetramine in deionized water, and preparing manganese-doped alpha-Co (OH) by a hydrothermal method2And washing and drying the hydrothermal product, and further calcining to obtain the manganese-doped cobaltosic oxide porous nanosheet material. The prepared manganese-doped cobaltosic oxide material has good toluene gas sensing performance, short response/recovery time and good stability, and has potential application prospect in monitoring toluene content in the environment such as atmosphere, chemical plant, home and the like.

Description

Manganese-doped cobaltosic oxide porous nano flaky material and preparation method and application thereof
Technical Field
The invention relates to a gas sensing material, in particular to a sensing material for sensing toluene gas molecules of volatile organic compounds, and particularly relates to a preparation method and application of a manganese-doped cobaltosic oxide porous nano flaky material for sensing toluene gas molecules.
Background
In the development trend of new era, the gas sensing technology is widely applied to various fields of monitoring the air quality of environment, medical diagnosis, industrial safety, food safety and the like. The gas molecules interact with the sensing material in the core part of the sensor during sensing the material, so that the physical or chemical property of the sensing material is changed, the physical or chemical property change of the sensing material is recorded or amplified through external equipment and is used as an output signal of the sensing material to the target gas molecules, and therefore the corresponding relation between the signal change recorded by the equipment and the target gas molecules is established, and the purpose of detecting the target gas molecules is achieved. Among many sensing materials, a sensor prepared by using a metal oxide as a sensing material has the advantages of simplicity, portability, good compatibility, relatively simple configuration and operation principle, and the like, and thus, the metal oxide is favored by most gas sensing researchers. However, the metal oxide materials studied at present have low response to target gas molecules, and most prepared sensors are suitable for detecting gas molecules with strong reducibility, such as ethanol, acetone and the like. For aromatic compounds with high stability, such as toluene, the sensing materials reported at present are difficult to detect such volatile organic compounds. Meanwhile, toluene molecule as a typical aromatic volatile organic compound has high toxicity and carcinogenicity, and seriously affects and threatens human health and atmospheric environment. Therefore, the development and preparation of the toluene gas sensing material with high response performance have great significance for the development of gas sensors.
The gas sensing process is a process of interaction between gas and sensing material, namely, gas molecules are adsorbed on the surface of the sensing material, then react on the surface of the sensing material, and finally are separated from the surface of the sensing material, and the process is a dynamic cycle reciprocating process. Therefore, when designing and preparing the sensing material, the adsorption capacity and mass transfer process of gas molecules on the surface of the material need to be considered. Doping modification is an effective strategy to change the surface state of the material, so that the adsorption capacity of gas molecules on the surface of the material can be adjusted. The mass transfer process is mainly influenced by the shape and structure of the material. Therefore, the adsorption capacity and mass transfer process of gas molecules on the surface of the sensing material have a significant influence on the gas sensing performance.
Disclosure of Invention
The invention aims to provide a manganese-doped cobaltosic oxide porous nano material and a preparation method thereof aiming at the existing problems in gas sensing materials, and the material has better toluene gas sensing performance.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a manganese-doped cobaltosic oxide porous nano flaky material is a nano flaky material prepared by an inorganic compound of a manganese element and an inorganic compound of a cobalt element according to a certain proportion.
Further, the inorganic compound of manganese element includes Mn (NO)3)2·4H2O and MnCl2·4H2And O is any one of the above.
Further, the inorganic compound of cobalt element includes Co (NO)3)2·6H2O。
Further, the ratio of the inorganic compound of manganese element to the inorganic compound of cobalt element is 0 to 9%, and may be 0%, 1%, 3%, 5%, 7%, 9%, preferably 3%.
The invention also provides a preparation method of the manganese-doped cobaltosic oxide porous nano flaky material, which comprises the following steps:
(1) selecting inorganic compounds of manganese element, inorganic compounds of cobalt element and hexamethylenetetramine as raw materials, dissolving the raw materials in water, and further obtaining manganese-doped alpha-Co (OH) through hydrothermal reaction2A nano-sheet material;
(2) washing and drying the manganese doped alpha-Co (OH) prepared2Nano sheet material；
(3) Doping manganese with alpha-Co (OH)2And heating the material for continuous sintering, and naturally cooling to room temperature to obtain the manganese-doped cobaltosic oxide porous nanosheet sensing material.
Further, the temperature of the hydrothermal reaction in the step (1) is 80-120 ℃, for example, 80 ℃, 90 ℃, 100 ℃, 110 ℃, 120 ℃, preferably 90 ℃; the reaction time is 3-24 h, such as 3h, 6h, 12h, 24h, preferably 6 h.
Further, the drying in the step (2) is carried out in an oven, and the drying temperature is 60-80 ℃, such as 60 ℃, 65 ℃, 70 ℃, 75 ℃, 80 ℃, preferably 60 ℃; the drying time is 3-24 h; for example 3h, 6h, 9h, 12h, 24h, preferably 12 h.
Further, the heating rate of the heating in the step (3) is 1-10 ℃ per minute-1E.g. 1 ℃ min-1、3℃·min-1、5℃·min-1、7℃·min-1、10℃·min-1Preferably 3 ℃ min-1。
Further, the sintering temperature in the step (3) is 300-500 ℃, for example 300 ℃, 350 ℃, 400 ℃, 450 ℃, 500 ℃, preferably 450 ℃; the sintering time is 1-4 h, such as 1h, 2h, 3h, 4h, preferably 2 h.
The invention also provides application of the prepared manganese-doped cobaltosic oxide porous nano flaky material, and the manganese-doped cobaltosic oxide porous nano flaky material is applied to sensing toluene gas molecules.
Compared with the prior art, the invention has the following beneficial effects:
(1) the sensing material with the porous nano flaky structure is prepared, and is beneficial to the mass transfer process in the gas sensing reaction;
(2) the manganese-doped cobaltosic oxide porous nano flaky material has higher toluene sensing performance;
(3) the manganese-doped cobaltosic oxide porous nano flaky material has a wider toluene concentration response range and good stability;
(4) the invention adopts nontoxic and harmless components, and reduces the harm to human health and ecological environment.
Drawings
FIG. 1 shows the alpha-Co (OH) according to the present invention2And Co3O4Scanning electron micrograph of (1);
FIG. 2 shows the alpha-Co (OH) according to the present invention2And manganese doped alpha-Co (OH)2X-ray diffraction patterns and Raman spectra of (a);
FIG. 3 shows the Co of the present invention3O4And manganese doped Co3O4X-ray diffraction patterns and Raman spectra of (a);
FIG. 4 shows the Co of the present invention3O4And manganese doped Co3O4Schematic diagram of material modified gold-inserted electrode;
FIG. 5 shows the Co of the present invention3O4And manganese doped Co3O4Response and resistance change curves for 100ppm toluene gas molecules at different operating temperatures.
FIG. 6 shows the Co of the present invention3O4And manganese doped Co3O4And the nano sheet material is used for sensing a performance test result graph of the toluene gas molecules under the optimal working condition.
Detailed Description
To better illustrate the invention and to facilitate the understanding of the technical solutions thereof, typical but non-limiting examples of the invention are as follows:
example 1
Preparation of manganese-doped cobaltosic oxide porous nano material
1425.7mg Co (NO) were weighed out on an analytical balance3)2·6H2O、38.0mg Mn(NO3)2·4H2Dissolving O and 2124.1mg of hexamethylenetetramine in 50mL of deionized water, continuously stirring for 10min under the condition of magnetic stirring, transferring the reaction liquid to a 70mL polytetrafluoroethylene lining, placing the polytetrafluoroethylene containing the reaction liquid in a stainless steel reaction kettle, placing the reaction kettle in an oven, and simultaneously heating to 90 ℃ to react for 6 h. After the reaction is finished, obtaining manganese-doped alpha-Co (OH) through centrifugation, water washing and drying2And finallyWeighing 100mg manganese doped alpha-Co (OH)2Placing into a porcelain boat, and adding manganese-doped alpha-Co (OH)2The porcelain boat is placed in a muffle furnace at 3 ℃ for min-1Heating to 450 ℃ at a heating rate for sintering for 2h to finally obtain the manganese-doped Co3O4Porous nanoplatelets.
As can be seen from FIG. 1, prepared α -Co (OH)2Manganese doped alpha-Co (OH)2、Co3O4And manganese doped Co3O4Exhibits a nano-sheet structure and is sintered to obtain Co3O4And manganese doped Co3O4The structure of the porous sheet is presented.
As can be seen from FIGS. 2 and 3, the X-ray diffraction pattern and Raman spectrum characterization showed that alpha-Co (OH) was successfully prepared2Manganese doped alpha-Co (OH)2、Co3O4And manganese doped Co3O4And (3) nano materials.
Example 2
Preparation of modified electrode
The modified electrode preparation process is shown in fig. 4. Separately weighing 4.0mg of prepared Co with an analytical balance3O4And manganese doped Co3O4And adding 200 mu L of deionized water, carrying out ultrasonic treatment for 1min to obtain uniform dispersion liquid, measuring 1.5 mu L of dispersion liquid, dripping the dispersion liquid on the surface of a 3X 3 gold finger electrode, and placing the gold finger electrode on a heating table and baking for 1h at 50 ℃ to obtain the modified electrode loaded with the sensing material. The modified electrode is placed in a gas test system and is heated and aged for 2h at 300 ℃ under the condition that the applied bias voltage is 2.0V.
Example 3
Influence of different manganese doping amounts on toluene gas sensing performance
Firstly, under different working temperatures, the response condition of the prepared sensing electrode to 100ppm toluene gas is shown in fig. 5a, and the response degree of the sensing material to the toluene gas is increased along with the increase of the working temperature from 180 ℃ to 260 ℃; between 280 ℃ and 360 ℃, the response of the sensing material to toluene gas is reduced along with the increase of the working temperature. At the same time, manganese doped Co can be seen3O4SensingThe material has higher toluene gas sensing performance. In addition, as shown in FIG. 5b, compared to undoped Co3O4Sensing material, manganese doped Co3O4Has higher resistance, and shows that the doping manganese element influences Co3O4Mobility rate of medium carriers, resulting in manganese doped Co3O4The sensing material has a higher resistance.
Example 4
Response of sensing material to different toluene concentration
The optimum working temperature of the selected sensor is 280 ℃, and toluene gas with different concentrations is introduced into the gas sensing test system, and the test result is shown in figure 6, compared with the undoped Co3O4Sensing material, manganese doped Co3O4The toluene gas sensor has higher toluene gas sensing performance under different toluene concentration conditions, and has a wider toluene concentration response range.

Claims (10)

1. The manganese-doped cobaltosic oxide porous nano flaky material is characterized in that the manganese-doped cobaltosic oxide porous nano flaky material is prepared by an inorganic compound of manganese element and an inorganic compound of cobalt element according to a certain proportion.
2. The manganese-doped cobaltosic oxide porous nanosheet material of claim 1, wherein the inorganic compound of manganese element comprises Mn (NO)3)2·4H2O and MnCl2·4H2And O is any one of the above.
3. The manganese-doped cobaltosic oxide porous nanosheet material of claim 1, wherein the inorganic compound of elemental cobalt comprises Co (NO)3)2·6H2O。
4. The manganese-doped cobaltosic oxide porous nanosheet material of claim 1, wherein the ratio of the inorganic compound of manganese to the inorganic compound of cobalt is 0-9%.
5. A method for preparing a manganese-doped cobaltosic oxide porous nanosheet material according to any one of claims 1 to 4, comprising the steps of:
(1) selecting inorganic compounds of manganese element, inorganic compounds of cobalt element and hexamethylenetetramine as raw materials, dissolving the raw materials in water, and further obtaining manganese-doped alpha-Co (OH) through hydrothermal reaction2A nano-sheet material;
(2) washing and drying the manganese doped alpha-Co (OH) prepared2A nano-sheet material;
(3) doping manganese with alpha-Co (OH)2Heating the material to be sintered continuously, and then naturally cooling to room temperature to obtain the manganese-doped cobaltosic oxide porous nano flaky material.
6. The preparation method of the manganese-doped cobaltosic oxide porous nano flaky material according to claim 5, wherein the hydrothermal reaction temperature in the step (1) is 80-120 ℃, and the reaction time is 3-24 h.
7. The preparation method of the manganese-doped cobaltosic oxide porous nano flaky material according to claim 5, wherein the drying in the step (2) is carried out in an oven, the drying temperature is 60-80 ℃, and the drying time is 3-24 h.
8. The preparation method of the manganese-doped cobaltosic oxide porous nano flaky material according to claim 5, wherein the heating rate in the step (3) is 1-10 ℃ per minute-1。
9. The preparation method of the manganese-doped cobaltosic oxide porous nanosheet-shaped material according to claim 5, wherein the sintering temperature in the step (3) is 300-500 ℃ and the sintering time is 1-4 h.
10. Use of a manganese-doped cobaltosic oxide porous nanosheet material prepared according to any one of claims 5 to 9, wherein the manganese-doped cobaltosic oxide porous nanosheet material is used to sense toluene gas molecules.
CN202110536373.0A 2021-05-17 2021-05-17 Manganese-doped cobaltosic oxide porous nano flaky material and preparation method and application thereof Active CN113295737B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110536373.0A CN113295737B (en) 2021-05-17 2021-05-17 Manganese-doped cobaltosic oxide porous nano flaky material and preparation method and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110536373.0A CN113295737B (en) 2021-05-17 2021-05-17 Manganese-doped cobaltosic oxide porous nano flaky material and preparation method and application thereof

Publications (2)

Publication Number Publication Date
CN113295737A true CN113295737A (en) 2021-08-24
CN113295737B CN113295737B (en) 2022-10-18

Family

ID=77322518

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110536373.0A Active CN113295737B (en) 2021-05-17 2021-05-17 Manganese-doped cobaltosic oxide porous nano flaky material and preparation method and application thereof

Country Status (1)

Country Link
CN (1) CN113295737B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114243030A (en) * 2021-12-21 2022-03-25 广西师范大学 Preparation method and application of doping type tubular cobalt-based material based on template-free method
CN114668850A (en) * 2022-03-17 2022-06-28 中山市华舜科技有限责任公司 Preparation method of capacitance antibacterial material
CN117819612A (en) * 2024-01-08 2024-04-05 科立鑫(珠海)新能源有限公司 Preparation process of doped cobaltosic oxide

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070009415A1 (en) * 2003-06-25 2007-01-11 Stefan Faber Mixed metal oxides and use thereof in co2 sensors
CN103543184A (en) * 2013-10-18 2014-01-29 浙江大学 Gas-sensitive sensor based on cobaltosic oxide nanoneedle as well as preparation method thereof
CN104528841A (en) * 2014-12-17 2015-04-22 陕西科技大学 Method for preparing nano Co2(OH)3Cl gas sensitive material by ultrasonic-microwave hydrothermal method and application
CN107572601A (en) * 2017-09-04 2018-01-12 天津大学 A kind of synthetic method of CoO appearance of nano material regulation and control
US20180031532A1 (en) * 2015-02-16 2018-02-01 Korea University Research And Business Foundation Methylbenzene gas sensor using palladium-containing cobalt oxide nanostructures and method for manufacturing the same
CN110082406A (en) * 2019-06-06 2019-08-02 吉林大学 One kind being based on SnO2-Co3O4The dimethylbenzene gas sensor and preparation method thereof of hetero-junctions nanostructure sensitive material
CN110455891A (en) * 2019-08-20 2019-11-15 吉林大学 Based on CoWO4-Co3O4The dimethylbenzene gas sensor and preparation method thereof of hetero-junctions nanostructure sensitive material
CN110885099A (en) * 2019-11-26 2020-03-17 东莞理工学院 Solvent-free synthesis method and application of cobaltosic oxide
CN112591803A (en) * 2020-12-28 2021-04-02 上海纳米技术及应用国家工程研究中心有限公司 Preparation of manganous oxide cluster modified cobaltosic oxide nano material for detection, product and application

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070009415A1 (en) * 2003-06-25 2007-01-11 Stefan Faber Mixed metal oxides and use thereof in co2 sensors
CN103543184A (en) * 2013-10-18 2014-01-29 浙江大学 Gas-sensitive sensor based on cobaltosic oxide nanoneedle as well as preparation method thereof
CN104528841A (en) * 2014-12-17 2015-04-22 陕西科技大学 Method for preparing nano Co2(OH)3Cl gas sensitive material by ultrasonic-microwave hydrothermal method and application
US20180031532A1 (en) * 2015-02-16 2018-02-01 Korea University Research And Business Foundation Methylbenzene gas sensor using palladium-containing cobalt oxide nanostructures and method for manufacturing the same
CN107572601A (en) * 2017-09-04 2018-01-12 天津大学 A kind of synthetic method of CoO appearance of nano material regulation and control
CN110082406A (en) * 2019-06-06 2019-08-02 吉林大学 One kind being based on SnO2-Co3O4The dimethylbenzene gas sensor and preparation method thereof of hetero-junctions nanostructure sensitive material
CN110455891A (en) * 2019-08-20 2019-11-15 吉林大学 Based on CoWO4-Co3O4The dimethylbenzene gas sensor and preparation method thereof of hetero-junctions nanostructure sensitive material
CN110885099A (en) * 2019-11-26 2020-03-17 东莞理工学院 Solvent-free synthesis method and application of cobaltosic oxide
CN112591803A (en) * 2020-12-28 2021-04-02 上海纳米技术及应用国家工程研究中心有限公司 Preparation of manganous oxide cluster modified cobaltosic oxide nano material for detection, product and application

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
汤丹蕾 等: ""EDTA 辅助合成Co3O4 纳米材料及其气敏性能"", 《无机材料学报》, vol. 35, no. 11, 30 November 2020 (2020-11-30) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114243030A (en) * 2021-12-21 2022-03-25 广西师范大学 Preparation method and application of doping type tubular cobalt-based material based on template-free method
CN114668850A (en) * 2022-03-17 2022-06-28 中山市华舜科技有限责任公司 Preparation method of capacitance antibacterial material
CN114668850B (en) * 2022-03-17 2024-04-19 中山市华舜科技有限责任公司 Preparation method of capacitor antibacterial material
CN117819612A (en) * 2024-01-08 2024-04-05 科立鑫(珠海)新能源有限公司 Preparation process of doped cobaltosic oxide

Also Published As

Publication number Publication date
CN113295737B (en) 2022-10-18

Similar Documents

Publication Publication Date Title
CN113295737B (en) Manganese-doped cobaltosic oxide porous nano flaky material and preparation method and application thereof
Wei et al. CO gas sensing of Pd-doped ZnO nanofibers synthesized by electrospinning method
Liu et al. Synthesis of Ce-doped In2O3 nanostructure for gas sensor applications
Amanulla et al. A non-enzymatic amperometric hydrogen peroxide sensor based on iron nanoparticles decorated reduced graphene oxide nanocomposite
Chen et al. Superior ethanol-sensing properties based on Ni-doped SnO2 p–n heterojunction hollow spheres
Kanchana et al. EDTA assisted synthesis of hydroxyapatite nanoparticles for electrochemical sensing of uric acid
Pimtong-Ngam et al. Preparation of tungsten oxide–tin oxide nanocomposites and their ethylene sensing characteristics
Wang et al. High efficiency xylene detection based on porous MoO3 nanosheets
CN108732207A (en) A kind of sensitive material used in formaldehyde examination and preparation method and application
CN110396006B (en) ZIF-8 film coated SnO2Composite gas-sensitive material and preparation method and application thereof
Wang et al. Co3O4 hollow nanotubes: facile synthesis and gas sensing properties
CN109142465B (en) Preparation method of cerium-doped tin dioxide sensing material for detecting formaldehyde at low temperature
CN110833817A (en) Dry synthesis method of rice hull biochar loaded nano-iron material
CN106986390B (en) A kind of gas sensitive and preparation method thereof detecting alcohol
CN106299392B (en) Nano Mn with manganese defect3O4Preparation method and application thereof
CN109324092A (en) Mesoporous polycrystalline ZnO nano piece and the preparation method and application thereof
Tie et al. Formaldehyde sensing characteristics of hydrothermally synthesized Zn2SnO4 nanocubes
Wan et al. Dense doping of indium to coral-like SnO2 nanostructures through a plasma-assisted strategy for sensitive and selective detection of chlorobenzene
Wang et al. Crucial structural effects of porous Co3O4 derived from Prussian blue analogue on the enhanced gas sensing performance
Li et al. The effect of microstructure and crystal defect on electrochemical performances of MgO nanobelts
Kannan et al. Impedimetric detection of alcohol vapours using nanostructured zinc ferrite
Wang et al. Fast detection of alcohols by novel sea cucumber-like indium tungsten oxide
CN111686734B (en) Preparation method and application of magnetic porous nickel nanosheets
CN108217750B (en) α -Fe2O3/FeOOH composite functional material and preparation method and application thereof
Blessi et al. Enhanced electrochemical performance and humidity sensing properties of Al3+ substituted mesoporous SnO2 nanoparticles

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant