CN114113234B - 一种具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料及其制备方法和应用 - Google Patents
一种具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料及其制备方法和应用 Download PDFInfo
- Publication number
- CN114113234B CN114113234B CN202111275374.0A CN202111275374A CN114113234B CN 114113234 B CN114113234 B CN 114113234B CN 202111275374 A CN202111275374 A CN 202111275374A CN 114113234 B CN114113234 B CN 114113234B
- Authority
- CN
- China
- Prior art keywords
- potential
- array
- electrode material
- coral
- electrode
- 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.)
- Active
Links
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 239000007772 electrode material Substances 0.000 title claims abstract description 41
- 229910021503 Cobalt(II) hydroxide Inorganic materials 0.000 title claims abstract description 33
- 239000005751 Copper oxide Substances 0.000 title claims abstract description 33
- ASKVAEGIVYSGNY-UHFFFAOYSA-L cobalt(ii) hydroxide Chemical compound [OH-].[OH-].[Co+2] ASKVAEGIVYSGNY-UHFFFAOYSA-L 0.000 title claims abstract description 33
- 229910000431 copper oxide Inorganic materials 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims abstract description 46
- 239000008103 glucose Substances 0.000 claims abstract description 46
- 235000014653 Carica parviflora Nutrition 0.000 claims abstract description 24
- 241000243321 Cnidaria Species 0.000 claims abstract description 24
- 239000010949 copper Substances 0.000 claims abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 11
- 238000002484 cyclic voltammetry Methods 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 230000035945 sensitivity Effects 0.000 claims abstract 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 229910021607 Silver chloride Inorganic materials 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 6
- MINVSWONZWKMDC-UHFFFAOYSA-L mercuriooxysulfonyloxymercury Chemical class [Hg+].[Hg+].[O-]S([O-])(=O)=O MINVSWONZWKMDC-UHFFFAOYSA-L 0.000 claims description 6
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 230000008021 deposition Effects 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 4
- 238000006056 electrooxidation reaction Methods 0.000 claims description 3
- 239000002135 nanosheet Substances 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 2
- 239000011540 sensing material Substances 0.000 claims description 2
- 230000004044 response Effects 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 5
- 239000002131 composite material Substances 0.000 abstract description 4
- 238000011065 in-situ storage Methods 0.000 abstract description 3
- 238000004070 electrodeposition Methods 0.000 abstract description 2
- 229910000510 noble metal Inorganic materials 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 238000000151 deposition Methods 0.000 description 3
- 230000002255 enzymatic effect Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000003053 toxin Substances 0.000 description 3
- 231100000765 toxin Toxicity 0.000 description 3
- 108700012359 toxins Proteins 0.000 description 3
- LEHOTFFKMJEONL-UHFFFAOYSA-N Uric Acid Chemical compound N1C(=O)NC(=O)C2=C1NC(=O)N2 LEHOTFFKMJEONL-UHFFFAOYSA-N 0.000 description 2
- TVWHNULVHGKJHS-UHFFFAOYSA-N Uric acid Natural products N1C(=O)NC(=O)C2NC(=O)NC21 TVWHNULVHGKJHS-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 235000010323 ascorbic acid Nutrition 0.000 description 2
- 229960005070 ascorbic acid Drugs 0.000 description 2
- 239000011668 ascorbic acid Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000000024 high-resolution transmission electron micrograph Methods 0.000 description 2
- 238000012417 linear regression Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- -1 salt ions Chemical class 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000001509 sodium citrate Substances 0.000 description 2
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229940116269 uric acid Drugs 0.000 description 2
- 108010015776 Glucose oxidase Proteins 0.000 description 1
- 239000004366 Glucose oxidase Substances 0.000 description 1
- 230000010718 Oxidation Activity Effects 0.000 description 1
- 238000003917 TEM image Methods 0.000 description 1
- 238000010364 biochemical engineering Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229960000074 biopharmaceutical Drugs 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 235000019420 glucose oxidase Nutrition 0.000 description 1
- 229940116332 glucose oxidase Drugs 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910000403 monosodium phosphate Inorganic materials 0.000 description 1
- 235000019799 monosodium phosphate Nutrition 0.000 description 1
- 239000002064 nanoplatelet Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 235000011083 sodium citrates Nutrition 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000003115 supporting electrolyte Substances 0.000 description 1
- 238000004627 transmission electron microscopy Methods 0.000 description 1
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
-
- 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
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/327—Biochemical electrodes, e.g. electrical or mechanical details for in vitro measurements
- G01N27/3275—Sensing specific biomolecules, e.g. nucleic acid strands, based on an electrode surface reaction
- G01N27/3277—Sensing specific biomolecules, e.g. nucleic acid strands, based on an electrode surface reaction being a redox reaction, e.g. detection by cyclic voltammetry
-
- 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
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/327—Biochemical electrodes, e.g. electrical or mechanical details for in vitro measurements
- G01N27/3275—Sensing specific biomolecules, e.g. nucleic acid strands, based on an electrode surface reaction
- G01N27/3278—Sensing specific biomolecules, e.g. nucleic acid strands, based on an electrode surface reaction involving nanosized elements, e.g. nanogaps or nanoparticles
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Analytical Chemistry (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Nanotechnology (AREA)
- Engineering & Computer Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Abstract
本发明公开了一种具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料及其制备方法和应用。该复合材料是按照以下步骤进行制备的:a、采用方波电势脉冲法处理光滑金属铜表面,快速原位生长出微米珊瑚状金属铜阵列;b、以循环伏安法将珊瑚状金属铜阵列电氧化,形成微米珊瑚状氧化铜阵列;c、经过电化学沉积处理,在氧化铜阵列表面负载氢氧化钴,形成具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料。该复合电极材料用于无酶电化学传感检测葡萄糖时表现出了灵敏度高、响应迅速、抗干扰和抗毒化性能,具有宽线性范围、低检测限及良好的稳定性。本发明为发展高性能、低成本的非贵金属基无酶葡萄糖传感器提供了新的思路。
Description
技术领域
本发明属于电化学传感器技术领域,具体涉及一种具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料及其制备方法和应用。
背景技术
作为疾病诊断、食品、生物加工和生物制药产业等领域的关键检测手段,葡萄糖传感器在过去的几十年里被越来越多的研究者开发。葡萄糖电化学传感技术以其痕量检测限、在线分析兼容性强、操作简单、响应速度快等优点受到了广泛的关注,它们可以分为两类(包括酶型和非酶型)。由于含昂贵葡萄糖氧化酶的葡萄糖电化学传感器容易受到pH、温度、湿度等因素的影响,因此通过制备价格低廉的非贵金属基材料,发展高活性和稳定性的无酶葡萄糖电化学传感器成为当务之急。
氧化铜(CuO)和氢氧化钴(Co(OH)2)由于其良好的选择性和易获得性,在葡萄糖电化学传感领域受到高度关注。然而,块状体相CuO和Co(OH)2的葡萄糖催化活性并不高,主要原因在于:(1)氧化态物种导电性较差,需要较高的检测电位;(2)高检测电势导致材料在电解液中的耐腐蚀性差,结构不稳定;(3)块状材料的活性位点仅仅暴露在体相边缘,作用于葡萄糖传感的位点太少。
发明内容
本发明的目的在于提供一种具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料及其制备方法和应用。
本发明提供的一种具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料的制备方法,具体包括以下步骤:
(1) 将光滑的金属铜盘电极(直径3 mm)浸入1 M H2SO4水溶液中,进行方波电势脉冲技术处理100 s,处理后的电极用去离子水清洗并干燥,即得到微米珊瑚状金属铜阵列电极材料(即Cu MCAs);
(2) 将步骤(1)中制备得到的Cu MCAs电极置于1 M NaOH水溶液中,通过循环伏安法处理进一步电氧化,氧化后的电极用去离子水清洗并干燥,即得到微米珊瑚状氧化铜阵列电极材料(即CuO MCAs);
(3) 将步骤(2)中制备得到的CuO MCAs电极浸入20 ml含有Co(NO3)2·6H2O和NaNO3的混合水溶液中,采用恒电势沉积技术处理,在CuO表面继续电化学修饰氢氧化钴,修饰后的电极用去离子水清洗并干燥,即得到异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料(即Co(OH)2/CuO MCAs)。
优选的,步骤(1)中,所述的方波电势脉冲技术参数为:在阴极电势和阳极电势(此处电势相对于饱和硫酸亚汞参比电极)之间以10~100 Hz频率进行电势阶跃,其中阴极电势区间为–1.6 ~ –1.2 V,而阳极电势区间为–0.2 ~ 0.2 V。
优选的,步骤(2)中,所述的循环伏安法处理参数为:从阴极电势至阳极电势(此处电势相对于饱和硫酸亚汞参比电极)以30 ~ 50 mV s–1扫速循环伏安扫描5~10圈,其中阴极电势区间为−0.9 ~ –0.7 V,而阳极电势区间为0.2 ~ 0.4 V。
优选的,步骤(3)中,所述的含有Co(NO3)2·6H2O和NaNO3的混合水溶液中,Co(NO3)2·6H2O的浓度为0.005 ~ 0.015 M,NaNO3的浓度为0.01~0.03 M。
优选的,步骤(3)中,所述的恒电势沉积技术参数为:选择恒定电势‒1.0 ~ –1.2 V(此处电势相对于饱和银/氯化银参比电极),运行20 ~ 40 s。
本发明提供的一种具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料,采用上述方法制备得到。该具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料可以作为电化学传感材料,用于无酶葡萄糖电化学传感。
异质结构可以调控半导体材料的能带电子结构,有效协同增强吸附葡萄糖分子的能力,同时保持结构的稳定性;分级结构(如珊瑚状)可以进一步增强半导体材料的活性位点的暴露;而有序的阵列结构不但能够改善导电性,还有助于增强电解液和葡萄糖分子在材料表面的传质动力学。将金属铜表面快速电化学重构形成微米珊瑚阵列,采用原位电化学使Co(OH)2均匀附着在CuO表面,形成异质结构Co(OH)2/CuO,可以显著协同增强并暴露葡萄糖催化位点,并使异质复合物与表面重构的微米珊瑚阵列结合,从而综合提升电极材料的无酶葡萄糖电化学传感活性以及稳定性。
与现有技术相比,本发明具有如下优点:
本发明提供的原位电化学制备方法,操作简单、快速,材料可重复性强,所用皆为廉价易得原材料;所得的具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料具有良好的导电性,其独特的异质结构为电解底液/葡萄糖分子传质提供了增强的附着位点,提供支撑负载的微米珊瑚阵列显著暴露了大量的传感活性位点;这种新型的电极材料在无酶葡萄糖电化学传感器应用方向显示出高效的活性,特别是具有宽线性范围、低检测限以及良好的抗干扰和抗毒化特性;该电极材料在连续使用15天后,仍然保持稳定的活性和结构,表现出超强的稳定性。
附图说明
图1是实施例1的具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料的扫描电子显微镜照片。
图2是实施例1的具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料的透射电子显微镜照片。
图3是实施例1的具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料的高分辨透射电子显微镜照片。
图4是实施例2的具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料作为无酶葡萄糖电化学传感器在含有不同浓度葡萄糖的0.1 M NaOH溶液中的循环伏安曲线。
图5是实施例2的具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料作为无酶葡萄糖电化学传感器在0.1 M NaOH中0.45 V电势下对不同浓度葡萄糖的计时电流响应曲线以及响应电流密度与葡萄糖浓度的线性回归曲线。
图6是实施例2的具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料作为无酶葡萄糖电化学传感器对0.2 mM葡萄糖、0.02 mM干扰物(抗坏血酸、尿酸)以及0.02 mM毒素盐离子(柠檬酸钠、氯化钾、硫酸钾、磷酸二氢钠)的电流响应曲线。
图7是实施例2的具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料作为无酶葡萄糖电化学传感器对葡萄糖连续检测15天的电流响应与初始电流比值的柱状图。
具体实施方式
为了能够更清楚地理解本发明的上述目的、特征和优点,下面结合附图和具体实施方式对本发明进行进一步的详细描述。在下面的描述中阐述了很多具体细节以便于充分理解本发明,但是,本发明还可以采用其他不同于在此描述的其他方式来实施,因此,本发明并不限于下面公开的具体实施例的限制。
本发明制备的产品,材料的结构组成由扫描电子显微镜(SEM)和透射电子显微镜(TEM)测定,无酶葡萄糖电化学传感性能在上海辰华电化学工作站上测得。
实施例1
本实施例的制备过程和步骤如下:
(1) 将直径为3 mm的光滑的金属铜盘电极浸入1 M H2SO4水溶液中,进行方波电势脉冲技术处理,在–1.4 V和–0 V电势(此处电势相对于饱和硫酸亚汞参比电极)之间,以50Hz频率进行电势阶跃,处理100 s,处理后的电极用去离子水清洗并干燥,即得到微米珊瑚状金属铜阵列电极材料(即Cu MCAs);
(2) 将Cu MCAs电极置于1 M NaOH水溶液中,通过循环伏安法处理,在−0.8 V至0.3 V电势(此处电势相对于饱和硫酸亚汞参比电极)之间,以50 mV s–1扫速循环伏安扫描10圈进一步电氧化,氧化后的电极用去离子水清洗并干燥,即得到微米珊瑚状氧化铜阵列电极材料(即CuO MCAs);
(3) 将CuO MCAs电极浸入20 ml含有0.01 M Co(NO3)2·6H2O和0.02 M NaNO3的混合水溶液中,采用恒电势沉积技术处理,选择恒定电势‒1.1 V(此处电势相对于饱和银/氯化银参比电极),运行30 s,在CuO表面继续电化学修饰氢氧化钴,修饰后的电极用去离子水清洗并干燥,即得到异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料(即Co(OH)2/CuOMCAs)。
扫描电子显微镜照片(见图1)显示,所得Co(OH)2/CuO MCAs电极材料由微米尺寸的珊瑚状阵列组成,其表面由大量的细小纳米片覆盖;通过透射电子显微镜对单个珊瑚枝进行分析(见图2),发现其呈现出明显的异质结构,即内层枝体为CuO晶体,而外层纳米片为Co(OH)2晶体。图3中的高分辨透射电子显微镜照片,也呈现了明显的两种物相晶界,同时还观测到晶界两侧的CuO (111)和Co(OH)2 (100)等不同晶面,由此可知所得异质结构材料由CuO和Co(OH)2组成。上述结构和组分表征可以说明,本发明的制备方法通过电化学表面重建先在金属铜表面重构形成了CuO微米珊瑚阵列,再以电化学沉积法在CuO表面修饰了Co(OH)2纳米片,最终形成了具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料,即Co(OH)2/CuO MCAs电极。
实施例2
本发明制备的具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极作为无酶葡萄糖电化学传感的性能测试,电化学性能研究如下:
所制备样品的电化学特性在CHI 760E电化学工作站(辰华仪器,中国上海)上测试。使用传统的三电极体系,即铂片电极作为对电极、饱和银/氯化银电极作为参比电极以及具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极作为工作电极。0.1 mol·L–1 NaOH水溶液作为支持电解液。除非特别指出,电化学传感测试中所有电势相对于饱和银/氯化银电极电势(E Ag/AgCl)。
图4是具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料(即Co(OH)2/CuOMCAs)作为无酶葡萄糖电化学传感器,在含有1~6 mM梯度浓度葡萄糖的0.1 M NaOH溶液中的循环伏安曲线。图中显示,该Co(OH)2/CuO MCAs电极材料对葡萄糖具有良好的电催化氧化活性,以及具有宽氧化电势范围(从0.2 V至0.55 V);同时,随着电解液中葡萄糖浓度的增加,葡萄糖氧化电流也随之显著增加,说明氧化电流与葡萄糖浓度存在正相关性。
图5是具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料作为无酶葡萄糖电化学传感器,在0.1 M NaOH中0.45 V电势下对滴加不同梯度浓度葡萄糖的计时电流响应曲线以及响应电流密度与葡萄糖浓度的线性回归曲线。图5a显示,随着葡萄糖的连续加入,电流密度曲线呈“台阶式”上升,甚至浓度低至500 nM时也有响应(见图5a中插图)。图5b绘制了三次重复计时电流响应测试的工作曲线(含误差棒),该复合电极展现了卓越的传感葡萄糖性能,如宽的线性范围(500 nM~2.311 mM,线性相关性r 2=0.9952)、超强灵敏度(2269μA mM-1 cm-2)和极低检出限(378 nM,基于信噪比S/N=3)。
图6是具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料作为无酶葡萄糖电化学传感器对0.2 mM葡萄糖、0.02 mM干扰物以及0.02 mM毒素盐离子的电流响应曲线。在0.45 V下进行了计时电流测试,图中显示,在该电势下可以有效地氧化葡萄糖,对葡萄糖的电流响应非常灵敏,电流台阶迅速达到了稳定值。该传感器不但可以排除人体内常见干扰生物分子(如抗坏血酸和尿酸)的干扰,还可以抵抗其它可能毒素(柠檬酸钠、KCl、K2SO4和NaH2PO4)的干扰。
图7是具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料作为无酶葡萄糖电化学传感器对葡萄糖连续检测15天的电流响应与初始电流比值的柱状图。图中显示,在连续测试15天的过程中,对0.2 mM葡萄糖电流密度响应值始终保持与初始值相当的水平,说明了该传感器具有良好的稳定性。
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (1)
1.一种具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料的制备方法,其特征在于,包括以下步骤:
(1) 将直径3 mm的光滑的金属铜盘电极浸入1 M H2SO4水溶液中,进行方波电势脉冲技术处理100 s,处理后的电极用去离子水清洗并干燥,得到微米珊瑚状金属铜阵列电极材料,即Cu MCAs;所述的方波电势脉冲技术参数为:在阴极电势和阳极电势之间以50~100 Hz频率进行电势阶跃,其中阴极电势区间为–1.4~–1.2 V,而阳极电势区间为0~0.2 V,此处电势相对于饱和硫酸亚汞参比电极;
(2) 将Cu MCAs电极置于1 M NaOH水溶液中,通过循环伏安法处理进一步电氧化,氧化后的电极用去离子水清洗并干燥,得到微米珊瑚状氧化铜阵列电极材料,即CuO MCAs;所述的循环伏安法处理参数为:从阴极电势至阳极电势以30 ~ 50 mV s–1扫速循环伏安扫描5~10圈,其中阴极电势区间为−0.8~–0.7 V,而阳极电势区间为0.3~0.4 V,此处电势相对于饱和硫酸亚汞参比电极;
(3) 将CuO MCAs电极浸入20 ml含有Co(NO3)2·6H2O和NaNO3的混合水溶液中,采用恒电势沉积技术处理,所述的恒电势沉积技术参数为:选择恒定电势‒1.0~–1.2 V,运行30 s,此处电势相对于饱和银/氯化银参比电极;在CuO表面继续电化学修饰氢氧化钴,修饰后的电极用去离子水清洗并干燥,得到异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料,即Co(OH)2/CuO MCAs;所述的含有Co(NO3)2·6H2O和NaNO3的混合水溶液中,Co(NO3)2·6H2O的浓度为0.01~0.015 M,NaNO3的浓度为0.02~0.03 M;
其中,所得的Co(OH)2/CuO MCAs电极材料内层由微米尺寸的珊瑚状CuO晶体组成,外层由Co(OH)2晶体纳米片阵列覆盖,呈异质结构;所得的Co(OH)2/CuO MCAs电极材料作为电化学传感材料用于无酶葡萄糖电化学传感时,检测线性范围为500 nM~2.311 mM,灵敏度为2269μA mM-1 cm-2,检出限为378 nM。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111275374.0A CN114113234B (zh) | 2021-10-29 | 2021-10-29 | 一种具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料及其制备方法和应用 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111275374.0A CN114113234B (zh) | 2021-10-29 | 2021-10-29 | 一种具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料及其制备方法和应用 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN114113234A CN114113234A (zh) | 2022-03-01 |
CN114113234B true CN114113234B (zh) | 2023-11-24 |
Family
ID=80379937
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202111275374.0A Active CN114113234B (zh) | 2021-10-29 | 2021-10-29 | 一种具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料及其制备方法和应用 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114113234B (zh) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116273001A (zh) * | 2022-11-25 | 2023-06-23 | 中国科学院新疆理化技术研究所 | 一种用于催化还原4-硝基苯酚的Cu-CuO/Co(OH)2的制备方法及应用 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110530944A (zh) * | 2019-08-19 | 2019-12-03 | 广州钰芯传感科技有限公司 | 一种基于铜基纳米复合结构的便携式微型葡萄糖无酶传感电极及其制备方法与应用 |
CN110849813A (zh) * | 2019-11-07 | 2020-02-28 | 曲阜师范大学 | 一种CuO-Cu2O/CM纳米线阵列异质结构的制备方法及应用 |
CN111307904A (zh) * | 2020-03-27 | 2020-06-19 | 西安工程大学 | 竹节状铜镍纳米线阵列葡萄糖传感器电极制备方法及应用 |
-
2021
- 2021-10-29 CN CN202111275374.0A patent/CN114113234B/zh active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110530944A (zh) * | 2019-08-19 | 2019-12-03 | 广州钰芯传感科技有限公司 | 一种基于铜基纳米复合结构的便携式微型葡萄糖无酶传感电极及其制备方法与应用 |
CN110849813A (zh) * | 2019-11-07 | 2020-02-28 | 曲阜师范大学 | 一种CuO-Cu2O/CM纳米线阵列异质结构的制备方法及应用 |
CN111307904A (zh) * | 2020-03-27 | 2020-06-19 | 西安工程大学 | 竹节状铜镍纳米线阵列葡萄糖传感器电极制备方法及应用 |
Non-Patent Citations (4)
Title |
---|
Enhanced Electrocatalytic Activity and Ultrasensitive Enzyme- Free Glucose Sensing based on Heterogeneous Co(OH)2 Nanosheets/CuO Microcoral Arrays via Interface Engineering;Yuxi Yuan et al.;《Industrial & Engineering Chemistry Research》;第61卷(第34期);第12567-12575页、Supporting Information * |
Nianfeng Shi et al..Co(OH)2nanosheets decorated Cu(OH)2 nanorods for highly sensitive nonenzymatic detection of glucose.《nanotechnology》.2020,第31卷第1-10页. * |
Siying An et al..Co-Ni layered double hydroxides wrapped on leaf-shaped copper oxide hybrids for non-enzymatic detection of glucose.《Journal of Colloid and Interface Science》.2021,第592卷第205-214页. * |
郭满满.含金属微纳米材料的快速制备及其光/电化学性能研究.《中国优秀博士学位论文全文数据库 工程科技I辑》.2016,(第08期),第1-149页. * |
Also Published As
Publication number | Publication date |
---|---|
CN114113234A (zh) | 2022-03-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Yuan et al. | Highly ordered platinum‐nanotubule arrays for amperometric glucose sensing | |
Lu et al. | Ni-MOF nanosheet arrays: efficient non-noble-metal electrocatalysts for non-enzymatic monosaccharide sensing | |
Saturno et al. | Electroanalytical detection of Pb, Cd and traces of Cr at micro/nano-structured bismuth film electrodes | |
US8309362B2 (en) | Process for the preparation of modified electrodes, electrodes prepared with said process, and enzymatic biosensors comprising said electrodes | |
Bao et al. | Ultrathin nickel-metal–organic framework nanobelt based electrochemical sensor for the determination of urea in human body fluids | |
Zen et al. | Square-wave voltammetric determination of uric acid by catalytic oxidation at a perfluorosulfonated ionomer/ruthenium oxide pyrochlore chemically modified electrode | |
Heli et al. | Non-enzymatic glucose biosensor based on hyperbranched pine-like gold nanostructure | |
Prabhu et al. | Preconcentration and determination of lead (II) at crown ether and cryptand containing chemically modified electrodes | |
Priya et al. | CuO microspheres modified glassy carbon electrodes as sensor materials and fuel cell catalysts | |
Cataldi et al. | Study of a cobalt‐based surface modified glassy carbon electrode: Electrocatalytic oxidation of sugars and alditols | |
CN111307904B (zh) | 竹节状铜镍纳米线阵列葡萄糖传感器电极制备方法及应用 | |
Kosminsky et al. | Determination of iodate in salt samples with amperometric detection at a molybdenum oxide modified electrode | |
CN113447552A (zh) | 一种无酶葡萄糖电化学传感器及制备方法 | |
Azizi et al. | Fabricating a new electrochemically modified pencil graphite electrode based on acetophenone (2, 4-dinitrophenyl) hydrazone for determining selenium in food and water samples | |
CN114113234B (zh) | 一种具有异质结构的氢氧化钴/氧化铜微米珊瑚阵列电极材料及其制备方法和应用 | |
Naik et al. | Surfactant induced iron (II) phthalocyanine modified carbon paste electrode for simultaneous detection of ascorbic acid, dopamine and uric acid | |
Chao et al. | Preparation of a porous Au electrode with a sacrificed Prussian blue analogue template for anodic stripping voltammetric analysis of trace arsenic (III) | |
Zhu et al. | Electrochemical determination of ascorbic acid based on hydrothermal synthesized ZnO nanoparticles | |
Majidi et al. | Electrocatalytic oxidation and determination of ceftriaxone sodium antibiotic in pharmaceutical samples on a copper hexacyanoferrate nanostructure | |
Liu et al. | Covalent anchoring of multifunctionized gold nanoparticles on electrodes towards an electrochemical sensor for the detection of cadmium ions | |
Zen et al. | Square-wave voltammetric determination of lead (II) with a Nafion®/2, 2-bipyridyl mercury film electrode | |
Cataldi et al. | Electrocatalysis and Amperometric Detection at a Ruthenium‐Modified Indium‐Hexacyanoferrate Film Electrode | |
Fei et al. | Amperometric determination of ascorbic acid at an electrodeposited redox polymer film modified gold electrode | |
Koçak | ZnO and Au nanoparticles supported highly sensitive and selective electrochemical sensor based on molecularly imprinted polymer for sulfaguanidine and sulfamerazine detection | |
Zhao et al. | A non-enzymatic glucose amperometric biosensor based on a simple one-step electrodeposition of Cu microdendrites onto single-walled carbon nanohorn-modified electrode |
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 |