CN110624579B - 一种定量检测水体中Cr(VI)的电化学方法 - Google Patents
一种定量检测水体中Cr(VI)的电化学方法 Download PDFInfo
- Publication number
- CN110624579B CN110624579B CN201910922296.5A CN201910922296A CN110624579B CN 110624579 B CN110624579 B CN 110624579B CN 201910922296 A CN201910922296 A CN 201910922296A CN 110624579 B CN110624579 B CN 110624579B
- Authority
- CN
- China
- Prior art keywords
- electrocatalyst
- solution
- water body
- reaction kettle
- pressure reaction
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 238000002848 electrochemical method Methods 0.000 title claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 239000010411 electrocatalyst Substances 0.000 claims abstract description 12
- 239000003054 catalyst Substances 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- QDAYJHVWIRGGJM-UHFFFAOYSA-B [Mo+4].[Mo+4].[Mo+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O Chemical compound [Mo+4].[Mo+4].[Mo+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QDAYJHVWIRGGJM-UHFFFAOYSA-B 0.000 claims abstract description 6
- OGNCVVRIKNGJHQ-UHFFFAOYSA-N 4-(3-pyridin-4-ylpropyl)pyridine Chemical compound C=1C=NC=CC=1CCCC1=CC=NC=C1 OGNCVVRIKNGJHQ-UHFFFAOYSA-N 0.000 claims abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910021577 Iron(II) chloride Inorganic materials 0.000 claims abstract description 4
- 238000000970 chrono-amperometry Methods 0.000 claims abstract description 4
- 238000002484 cyclic voltammetry Methods 0.000 claims abstract description 4
- 229910021397 glassy carbon Inorganic materials 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims abstract description 4
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims abstract description 4
- 229910004619 Na2MoO4 Inorganic materials 0.000 claims abstract 2
- 239000011684 sodium molybdate Substances 0.000 claims abstract 2
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical group [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000000243 solution Substances 0.000 claims description 19
- 238000012360 testing method Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- 239000012153 distilled water Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 claims description 4
- 229920000557 Nafion® Polymers 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 230000004044 response Effects 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 9
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000003786 synthesis reaction Methods 0.000 abstract description 3
- 229910019142 PO4 Inorganic materials 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 2
- 239000008346 aqueous phase Substances 0.000 abstract 1
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 238000001027 hydrothermal synthesis Methods 0.000 abstract 1
- 239000011651 chromium Substances 0.000 description 37
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 229910000510 noble metal Inorganic materials 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910015667 MoO4 Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 229940125904 compound 1 Drugs 0.000 description 2
- 238000000835 electrochemical detection Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 231100000086 high toxicity Toxicity 0.000 description 2
- 238000001095 inductively coupled plasma mass spectrometry Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000011573 trace mineral Substances 0.000 description 2
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 2
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 1
- 238000001636 atomic emission spectroscopy Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- -1 carbon powder compound Chemical class 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012468 concentrated sample Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000840 electrochemical analysis Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 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
- 230000036541 health Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- AICOOMRHRUFYCM-ZRRPKQBOSA-N oxazine, 1 Chemical compound C([C@@H]1[C@H](C(C[C@]2(C)[C@@H]([C@H](C)N(C)C)[C@H](O)C[C@]21C)=O)CC1=CC2)C[C@H]1[C@@]1(C)[C@H]2N=C(C(C)C)OC1 AICOOMRHRUFYCM-ZRRPKQBOSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001766 physiological effect Effects 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- 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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/186—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J27/188—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with chromium, molybdenum, tungsten or polonium
- B01J27/19—Molybdenum
-
- B01J35/33—
-
- 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
Abstract
本发明公开了一种用于水体中定量检测Cr(VI)的电化学方法。钼磷酸盐电催化剂是采用Na2MoO4·2H2O,FeCl2·4H2O,1,3‑二(4‑吡啶基)丙烷(bpp),无水乙醇和H3PO4为原料水热反应制备;随后使用该电催化剂/碳粉修饰玻碳电极作为工作电极,采用循环伏安技术和计时电流技术进行水相中的Cr(VI)定量检测。本发明方法操作简单,成本低廉,无环境污染。所制备的电催化材料可以有效检测Cr(VI),其对Cr(VI)的检出限低至0.009ppm,且该手段具有较高的稳定性和选择性。与现行工艺相比,催化剂用量少且绿色高效,合成成本低廉,响应过程灵敏。
Description
技术领域
本发明涉及一种用于定量检测水体中Cr(VI)的电化学方法,包含新型{M(P4Mo6)2}基磷钼酸盐电催化剂的制备方法,属于电分析化学技术领域。
背景技术
重金属离子对水生态环境具有严重的破坏性。由于重金属离子在生物体内的富集作用和无法自然降解的特性,对人体健康产生了严重威胁。铬元素具有丰富的氧化态:金属铬化学性质稳定,可电镀于金属表面以阻止腐蚀的发生,主要用于餐具、水管等方面;而离子状态会对人体表现出不同的生理活性:Cr(III)是人体必需的微量元素,能够参与人体的代谢,Cr(VI)却是一种可致癌的高毒性污染物,以Cr2O7 2-或CrO4 2-离子形式存在的Cr(VI)在水中具有较高的溶解度。根据WHO建议,饮用水中Cr(VI)的最大浓度为0.05ppm,我国要求工厂排放污水的Cr(VI)浓度应控制在0.5ppm及以下。
考虑到Cr(VI)在水中易扩散的特性和对生物体的高毒性,研究高效的分析方法来实现Cr(VI)的痕量级检测具有重要意义。现阶段水中Cr(VI)的分析检测方法主要包括:紫外可见分光光度法(UV-Vis)、电感耦合等离子体质谱法(ICP-MS)、原子吸收光谱(AAS)、原子发射光谱(AES)及电化学方法。相比于其他测试方法,电化学方法具有成本低、操作便捷、测试过程高效迅速等优点,得以广泛应用。
当今对Cr(VI)电检测催化剂的研究集中于贵金属与碳的复合材料上,如文献报道,金纳米粒子修饰的碳纳米管(AuNPs@CNT,J.App.Electrochem.,2019,49,195-205)、金纳米粒子修饰的丝网印刷碳电极(AuNPs@SPE,Sensors Actuat.B-Chem.,2018,272,582-588)、金/钯纳米粒子修饰的还原氧化石墨烯(Au/PtNPs@rGO,J.Electrochem.Soc.,2018,165,893-899),三者对Cr(VI)的检出限分别可达0.72μM、5.4ppb和0.013μM。贵金属材料具有较高的灵敏度和重现性,但其在地壳中的储量较低,使用成本高昂;而碳材料的合成水平和稳定性参差不齐,致使产品性能和稳定性较差。为此,研究由丰产元素构成的电催化剂,用于Cr(VI)的电化学检测具有重要的研究意义。本文研究的{M(P4Mo6)2}基磷钼酸盐催化剂具有清晰可调的分子结构,能够对Cr(VI)表现出高效高选择性的电化学响应,且其合成原料丰富低廉、产量稳定可观、化学性质稳定,为其作为Cr(VI)的电催化剂的潜在应用提供了保障。
发明内容
本发明的目的在于提供一种定量检测水体中Cr(VI)的电化学方法。
本发明解决其技术问题通过以下技术方案实现,一种用于定量检测水体中Cr(VI)的电化学方法,包括以下步骤:
(1)钼磷酸盐电催化剂的合成:室温条件下,将Na2MoO4·2H2O(240mg)、FeCl2·4H2O(80mg),1,3-二(4-吡啶基)丙烷(30mg)溶于10mL蒸馏水中,随后依次加入2mL无水乙醇和0.5mL浓磷酸,用4mol/L的NaOH溶液将混合溶液pH调至3.0附近;将混合溶液装入25mL高压反应釜,然后置于鼓风干燥箱内,以160℃恒温加热100~120h,最后每小时降低8℃的降温速率降至室温后,收集橙色晶状产品,即得成品。本发明中,反应物溶液的pH值和反应温度是催化剂制备成功的关键。
(2)水体中Cr(VI)检测的电化学方法:以该磷钼酸盐作为电检测催化剂,进行水体中Cr(VI)的定量检测。步骤如下:
①将钼磷酸盐电催化剂与碳粉混合于Nafion溶液,滴涂在玻碳电极表面制备工作电极,后在H2SO4溶液(pH≈0.3)中进行循环伏安测试,用以确定所用电位。
②选取电位最负还原峰的电位进行计时安培法测定。通过阶梯连续提高溶液浓度,以测试该催化剂对K2Cr2O7的电检测线性范围、灵敏度和检出限。
本发明取得的有益效果如下:
本发明利用钼磷酸盐作为电催化剂实现了水体中Cr(VI)的定量检测,
附图说明
图1:实施例1中,空白GCE和修饰电极(1-GCE)在含有不同浓度K2Cr2O7的H2SO4溶液中的循环伏安图。
图2:实施例1中,在恒定扫描电位和搅拌速度下,以60s间隔提高溶液中K2Cr2O7浓度所得的i-t响应图线。
图3:实施例1中,溶液中K2Cr2O7物质浓度与响应电流的线性拟合曲线。
图4:实施例1中,1-GCE的选择性电检测测试结果。
图5:实施例1中,1-GCE在不同水质溶液中的K2Cr2O7物质浓度与响应电流的线性拟合曲线。
具体实施方式
(1)催化剂的制备:利用分析天平分别称取240mg、80mg和30mg的Na2MoO4·2H2O,FeCl2·4H2O,1,3-二(4-吡啶基)丙烷分散于10mL蒸馏水中,随后依次向其中加入2mL的无水乙醇和0.5mL的H3PO4,室温下搅拌0.5h并调节pH。后将混合液装入25mL的高压反应釜中,在烘箱内以160℃加热5天,后缓慢降至室温,将固体物质洗涤后可得橙红色晶态化合物1。
(2)修饰电极的制备:将5mg化合物1与10mg碳粉混合于Nafion溶液(0.5mL,0.5%)中,混合液经2h超声分散后,将10μL上清液滴涂于玻碳电极表面,以得到化合物1/碳粉复合物修饰电极(简写为1-GCE)。
(3)Cr(VI)电化学测试条件的确定:将1-GCE作为工作电极,以铂丝为对电极、Ag/AgCl电极为参比电极组装为三电极法组装测试体系。首先在含有不同浓度K2Cr2O7的0.5M硫酸溶液(pH≈0.3)中进行循环伏安测试,测试条件为:扫描范围-0.2~0.8V,扫速50mV/s,结果如图1所示。
(4)Cr(VI)的电化学检测:选取图1的I’号还原峰对应电位进行计时安培法测定,测试参数为:施加电位-0.063V,取样测试间隔为1s,并于测试开始前测试300s以平衡电流,后通过连续提高溶液的K2Cr2O7浓度以得到响应电流。结果如图2-3所示,浓度与响应电流平均值的线性拟合显示,1-GCE对1-1305μM浓度内的K2Cr2O7溶液实现了良好的线性电化学响应(对应Cr(VI)质量浓度为0.1-135.7ppm),线性回归方程为:IR(μA)=-0.234C(μM)–3.597(R2=0.999,C为K2Cr2O7浓度,IR为响应电流平均值)。根据S/N=3原则计算(灵敏度(S)=234μA·mM-1、空白标准偏差(N)=6.81nA),可得其对Cr2O7 2-的检出限为87nM,即其对Cr(VI)的检出限低至0.009ppm。
(5)选择性测试:选择性测试的参数与计时安培法相同,在空白电流稳定后,间隔100s加入不同浓缩样品使溶液提高50μM相应浓度,结果如图4所示,可以看到除Cr2O7 2-外,1-GCE对K+、Cr3+、Na+、Cd2+、Pb2+、Co2+、Ni2+等金属离子均不表现出明显响应,表明其电检测过程具有高选择性。
(6)实际样品检测:实际样品选择自然湖水进行测试,在经过简单过滤以除去大颗粒固体杂质后,将其配置为0.5M的硫酸溶液作为电解液。后在相同体系和条件下进行计时安培法测试。根据上述方法拟合可得,1-GCE在自然湖水配置电解液中的响应线性方程为IR(μA)=-0.239C(μM)–3.67(R2=0.998)。与蒸馏水配置电解液中的响应线性方程相比,该浓度范围内的响应电流误差可维持在2.03%~2.14%的范围内,这表明本发明提供的电催化剂有望用于工厂废水、生活用水水质检测中Cr(VI)含量的准确测定。
Claims (1)
1.一种用于水体中定量检测Cr(VI)的电化学方法,其特征在于包括以下步骤:
(1)钼磷酸盐电催化剂的制备:室温条件下,将240mg Na2MoO4·2H2O、80mg FeCl2·4H2O、30mg 1,3-二(4-吡啶基)丙烷溶于10mL蒸馏水中,随后依次加入2mL无水乙醇和0.5mL浓磷酸,用4mol/L的NaOH溶液将混合溶液pH调至3.0;将混合溶液装入25mL高压反应釜,然后置于鼓风干燥箱内,以160℃恒温加热100~120h,最后以每小时降低8℃的降温速率降至室温,收集橙色晶状产品,即得电催化剂;
(2)将钼磷酸盐电催化剂与碳粉混合于Nafion溶液,滴涂在玻碳电极表面制备工作电极,然后在pH≈0.3的H2SO4溶液中进行循环伏安测试,用以确定所用电位,选取电位最负还原峰的电位进行计时安培法测定,通过阶梯连续提高溶液浓度,以测试该催化剂对K2Cr2O7的电检测线性范围、灵敏度和检出限。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910922296.5A CN110624579B (zh) | 2019-09-27 | 2019-09-27 | 一种定量检测水体中Cr(VI)的电化学方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910922296.5A CN110624579B (zh) | 2019-09-27 | 2019-09-27 | 一种定量检测水体中Cr(VI)的电化学方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN110624579A CN110624579A (zh) | 2019-12-31 |
CN110624579B true CN110624579B (zh) | 2022-05-10 |
Family
ID=68973234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201910922296.5A Active CN110624579B (zh) | 2019-09-27 | 2019-09-27 | 一种定量检测水体中Cr(VI)的电化学方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN110624579B (zh) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114773364B (zh) * | 2022-04-22 | 2023-07-21 | 河北师范大学 | 一种镉基磷钼酸盐催化剂、光电传感器及其制备方法和应用 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102218348A (zh) * | 2011-04-27 | 2011-10-19 | 哈尔滨师范大学 | 取代型钼磷酸盐晶体催化剂的制备方法 |
CN104248978A (zh) * | 2013-06-25 | 2014-12-31 | 佳木斯大学 | 一种磷钼酸盐晶体催化剂的制备方法 |
CN107884464A (zh) * | 2017-10-30 | 2018-04-06 | 济南大学 | 一种多钼磷酸‑氮杂环盐超分子化合物修饰电极的制备方法 |
-
2019
- 2019-09-27 CN CN201910922296.5A patent/CN110624579B/zh active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102218348A (zh) * | 2011-04-27 | 2011-10-19 | 哈尔滨师范大学 | 取代型钼磷酸盐晶体催化剂的制备方法 |
CN104248978A (zh) * | 2013-06-25 | 2014-12-31 | 佳木斯大学 | 一种磷钼酸盐晶体催化剂的制备方法 |
CN107884464A (zh) * | 2017-10-30 | 2018-04-06 | 济南大学 | 一种多钼磷酸‑氮杂环盐超分子化合物修饰电极的制备方法 |
Non-Patent Citations (2)
Title |
---|
Phosphomolybdate assembly as a low-cost catalyst for the reduction of toxic Cr(vi) in aqueous solution;Xiaoxiao Wang等;《Dalton Transactions》;20170531;第46卷(第24期);第2.2节 * |
多酸阴离子在不同介质中的电化学和传感性质研究;崔杨;《中国优秀博硕士学位论文全文数据库(硕士) 工程科技Ⅰ辑》;20050815(第04期);全文 * |
Also Published As
Publication number | Publication date |
---|---|
CN110624579A (zh) | 2019-12-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Li et al. | Simultaneous determination of ultratrace lead and cadmium by square wave stripping voltammetry with in situ depositing bismuth at Nafion-medical stone doped disposable electrode | |
Yildiz et al. | Voltammetric determination of nitrite in meat products using polyvinylimidazole modified carbon paste electrode | |
Wen et al. | Determination of nitrite using sensors based on nickel phthalocyanine polymer modified electrodes | |
Rounaghi et al. | Voltammetric determination of 4-nitrophenol using a modified carbon paste electrode based on a new synthetic crown ether/silver nanoparticles | |
Tashkhourian et al. | Simultaneous determination of tyrosine and tryptophan by mesoporous silica nanoparticles modified carbon paste electrode using H-point standard addition method | |
Saghatforoush et al. | Deposition of new thia-containing Schiff-base iron (III) complexes onto carbon nanotube-modified glassy carbon electrodes as a biosensor for electrooxidation and determination of amino acids | |
Gu et al. | A sensitive hydrazine hydrate sensor based on a mercaptomethyl-terminated trinuclear Ni (II) complex modified gold electrode | |
Zhou et al. | A sensitive and environmentally friendly method for determination of chemical oxygen demand using NiCu alloy electrode | |
Ensafi et al. | Highly sensitive voltammetric speciation and determination of inorganic arsenic in water and alloy samples using ammonium 2‐amino‐1‐cyclopentene‐1‐dithiocarboxylate | |
Hajian et al. | Nanomolar detection of methylparaben by a cost-effective hemoglobin-based biosensor | |
Cesarino et al. | A novel graphite–polyurethane composite electrode modified with thiol-organofunctionalized silica for the determination of copper ions in ethanol fuel | |
Zare et al. | Electrochemical behavior of nano-composite containing 4-hydroxy-2-(triphenylphosphonio) phenolate and multi-wall carbon nanotubes spiked in carbon paste and its application for electrocatalytic oxidation of hydrazine | |
Guha et al. | Differential pulse anodic stripping voltammetric determination of Hg2+ at poly (Eriochrome Black T)-modified carbon paste electrode | |
Zare et al. | Fabrication, electrochemical characteristics and electrocatalytic activity of 4-((2-hydroxyphenylimino) methyl) benzene-1, 2-diol electrodeposited on a carbon nanotube modified glassy carbon electrode as a hydrazine sensor | |
Amara et al. | Copper oxide integrated perylene diimide self-assembled graphitic pencil for robust non-enzymatic dopamine detection | |
Chatraei et al. | Nano-scale islands of ruthenium oxide as an electrochemical sensor for iodate and periodate determination | |
Shoub et al. | Gold Nanoparticles/Ionophore-Modified Screen-Printed Electrode for Detection of Pb (II) in River Water Using Linear Sweep Anodic Stripping Voltammetry. | |
CN110624579B (zh) | 一种定量检测水体中Cr(VI)的电化学方法 | |
Rabie et al. | A Novel Electrochemical Sensor Based on Modified Carbon Paste Electrode with ZnO Nanorods for the Voltammetric Determination of Indole‐3‐acetic Acid in Plant Seed Extracts | |
Bebeselea et al. | The electrochemical determination of phenolic derivates using multiple pulsed amperometry with graphite based electrodes | |
Hasanzadeh et al. | A new kinetic‐mechanistic approach to elucidate formaldehyde electrooxidation on copper electrode | |
CN113030210B (zh) | 一种碳点/铋膜修饰玻碳电极的制备及检测镉和铅离子的方法 | |
Rahmadhani et al. | Electropolymerized of aniline as a new molecularly imprinted polymer for determination of phenol: A study for phenol sensor | |
Huszal et al. | Determination of platinum with thiosemicarbazide by catalytic adsorptive stripping voltammetry (AdSV) | |
Kadivar et al. | A molecularly imprinted poly 2-aminophenol–gold nanoparticle–reduced graphene oxide composite for electrochemical determination of flutamide in environmental and biological samples |
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 |