ВИЗНАЧЕННЯ КОНЦЕНТРАЦІЇ Cu(ІІ) У ВОДНОМУ СЕРЕДОВИЩІ З ВИКОРИСТАННЯМ ІНВЕРСІЙНОГО ЕЛЕКТРОХІМІЧНОГО МЕТОДУ
Electrode materials based on titanium dioxide modified with zinc ions and gold nanoparticles, synthesized by sol-gel method, were used to determine the concentration of Cu (II) in liquids by stripping voltammetry method. Determination of Cu (II) was done using background solutions based on 0.4 M for...
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| Дата: | 2019 |
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| Автори: | , , , , |
| Формат: | Стаття |
| Мова: | English |
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V.I.Vernadsky Institute of General and Inorganic Chemistry
2019
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| Онлайн доступ: | https://ucj.org.ua/index.php/journal/article/view/61 |
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| Назва журналу: | Ukrainian Chemistry Journal |
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Ukrainian Chemistry Journal| id |
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2019-08-16T10:36:32Z |
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| topic |
діоксид титану визначення міді(II) інверсійна вольтамперометрія інверсійний фотоелектрохімічний метод. |
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діоксид титану визначення міді(II) інверсійна вольтамперометрія інверсійний фотоелектрохімічний метод. Vorobets, Vera Kolbasov , Gennadii Fomanyuk, Sergii Smirnova, Nataliia Linnik, Oksana ВИЗНАЧЕННЯ КОНЦЕНТРАЦІЇ Cu(ІІ) У ВОДНОМУ СЕРЕДОВИЩІ З ВИКОРИСТАННЯМ ІНВЕРСІЙНОГО ЕЛЕКТРОХІМІЧНОГО МЕТОДУ |
| topic_facet |
titanium dioxide determination of copper(II) stripping voltammetry inversion spectral photoelectrochemical method. диоксид титана определение меди Cu(ІІ) инверсионная вольтамперометрия инверсионный фотоэлектрохимический метод. діоксид титану визначення міді(II) інверсійна вольтамперометрія інверсійний фотоелектрохімічний метод. |
| format |
Article |
| author |
Vorobets, Vera Kolbasov , Gennadii Fomanyuk, Sergii Smirnova, Nataliia Linnik, Oksana |
| author_facet |
Vorobets, Vera Kolbasov , Gennadii Fomanyuk, Sergii Smirnova, Nataliia Linnik, Oksana |
| author_sort |
Vorobets, Vera |
| title |
ВИЗНАЧЕННЯ КОНЦЕНТРАЦІЇ Cu(ІІ) У ВОДНОМУ СЕРЕДОВИЩІ З ВИКОРИСТАННЯМ ІНВЕРСІЙНОГО ЕЛЕКТРОХІМІЧНОГО МЕТОДУ |
| title_short |
ВИЗНАЧЕННЯ КОНЦЕНТРАЦІЇ Cu(ІІ) У ВОДНОМУ СЕРЕДОВИЩІ З ВИКОРИСТАННЯМ ІНВЕРСІЙНОГО ЕЛЕКТРОХІМІЧНОГО МЕТОДУ |
| title_full |
ВИЗНАЧЕННЯ КОНЦЕНТРАЦІЇ Cu(ІІ) У ВОДНОМУ СЕРЕДОВИЩІ З ВИКОРИСТАННЯМ ІНВЕРСІЙНОГО ЕЛЕКТРОХІМІЧНОГО МЕТОДУ |
| title_fullStr |
ВИЗНАЧЕННЯ КОНЦЕНТРАЦІЇ Cu(ІІ) У ВОДНОМУ СЕРЕДОВИЩІ З ВИКОРИСТАННЯМ ІНВЕРСІЙНОГО ЕЛЕКТРОХІМІЧНОГО МЕТОДУ |
| title_full_unstemmed |
ВИЗНАЧЕННЯ КОНЦЕНТРАЦІЇ Cu(ІІ) У ВОДНОМУ СЕРЕДОВИЩІ З ВИКОРИСТАННЯМ ІНВЕРСІЙНОГО ЕЛЕКТРОХІМІЧНОГО МЕТОДУ |
| title_sort |
визначення концентрації cu(іі) у водному середовищі з використанням інверсійного електрохімічного методу |
| title_alt |
DETERMINATION OF CU(II) CONCENTRATION IN AQUEOUS MEDIUM USING INVERSION ELECTROCHEMICAL METHOD ОПРЕДЕЛЕНИЕ КОНЦЕНТРАЦИИ Cu(II) В ВОДНОЙ СРЕДЕ С ИСПОЛЬЗОВАНИЕМ ИНВЕРСИОННОГО ЭЛЕКТРОХИМИЧЕСКОГО МЕТОДА |
| description |
Electrode materials based on titanium dioxide modified with zinc ions and gold nanoparticles, synthesized by sol-gel method, were used to determine the concentration of Cu (II) in liquids by stripping voltammetry method. Determination of Cu (II) was done using background solutions based on 0.4 M formic acid and ammonium acetate buffer (pH = 7.5) using the standard addition method with a potential scanning speed of 50 mV•s-1. The solution was stirred during the preliminary electrolysis at a potential of -1400 mV (vs silver-chloride reference electrode) for 120 seconds and then the potential was scanned from -1200 mV to + 200 mV. It is shown that the background solution based on ammonium acetate buffer provides a higher sensitivity and a good selectivity of peaks for the determination of copper compared to the background solution based on formic acid. Determined that value of the analytical signal of copper in the studied model solutions based on ammonium acetate and formic acid is proportional to the concentration of copper ions in the solution. To increase the selectivity of stripping voltammetry method in determining copper concentrations in solutions, an inversion spectral photoelectrochemical method was proposed, the essence of which is preliminary electroconcentration of the elements under investigation in the cathode potential region and subsequent measurement of the spectral photoelectrochemical characteristics of electroconcentration products. It has been found that in solutions of 1M ammonium acetate containing Cu2+ ions, the cathodic polarization of TiO2-based photoelectrode leads to the appearance of a cathode photocurrent and the values of photocurrent quantum yield increase with increasing content of copper ions in the solution. The spectral sensitivity of the surface layer corresponds to the absorption spectrum of Cu2O. The sensitivity of stripping voltammetry method to copper Cu (II) using the materials studied was 0.3 mg•l-1. It is shown that the inversion photoelectrochemical method is promising in the selective determination of copper concentration in liquids. |
| publisher |
V.I.Vernadsky Institute of General and Inorganic Chemistry |
| publishDate |
2019 |
| url |
https://ucj.org.ua/index.php/journal/article/view/61 |
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oai:ojs2.1444248.nisspano.web.hosting-test.net:article-612019-08-16T10:36:32Z DETERMINATION OF CU(II) CONCENTRATION IN AQUEOUS MEDIUM USING INVERSION ELECTROCHEMICAL METHOD ОПРЕДЕЛЕНИЕ КОНЦЕНТРАЦИИ Cu(II) В ВОДНОЙ СРЕДЕ С ИСПОЛЬЗОВАНИЕМ ИНВЕРСИОННОГО ЭЛЕКТРОХИМИЧЕСКОГО МЕТОДА ВИЗНАЧЕННЯ КОНЦЕНТРАЦІЇ Cu(ІІ) У ВОДНОМУ СЕРЕДОВИЩІ З ВИКОРИСТАННЯМ ІНВЕРСІЙНОГО ЕЛЕКТРОХІМІЧНОГО МЕТОДУ Vorobets, Vera Kolbasov , Gennadii Fomanyuk, Sergii Smirnova, Nataliia Linnik, Oksana titanium dioxide, determination of copper(II), stripping voltammetry, inversion spectral photoelectrochemical method. диоксид титана, определение меди Cu(ІІ), инверсионная вольтамперометрия, инверсионный фотоэлектрохимический метод. діоксид титану, визначення міді(II), інверсійна вольтамперометрія, інверсійний фотоелектрохімічний метод. Electrode materials based on titanium dioxide modified with zinc ions and gold nanoparticles, synthesized by sol-gel method, were used to determine the concentration of Cu (II) in liquids by stripping voltammetry method. Determination of Cu (II) was done using background solutions based on 0.4 M formic acid and ammonium acetate buffer (pH = 7.5) using the standard addition method with a potential scanning speed of 50 mV•s-1. The solution was stirred during the preliminary electrolysis at a potential of -1400 mV (vs silver-chloride reference electrode) for 120 seconds and then the potential was scanned from -1200 mV to + 200 mV. It is shown that the background solution based on ammonium acetate buffer provides a higher sensitivity and a good selectivity of peaks for the determination of copper compared to the background solution based on formic acid. Determined that value of the analytical signal of copper in the studied model solutions based on ammonium acetate and formic acid is proportional to the concentration of copper ions in the solution. To increase the selectivity of stripping voltammetry method in determining copper concentrations in solutions, an inversion spectral photoelectrochemical method was proposed, the essence of which is preliminary electroconcentration of the elements under investigation in the cathode potential region and subsequent measurement of the spectral photoelectrochemical characteristics of electroconcentration products. It has been found that in solutions of 1M ammonium acetate containing Cu2+ ions, the cathodic polarization of TiO2-based photoelectrode leads to the appearance of a cathode photocurrent and the values of photocurrent quantum yield increase with increasing content of copper ions in the solution. The spectral sensitivity of the surface layer corresponds to the absorption spectrum of Cu2O. The sensitivity of stripping voltammetry method to copper Cu (II) using the materials studied was 0.3 mg•l-1. It is shown that the inversion photoelectrochemical method is promising in the selective determination of copper concentration in liquids. Electrode materials based on titanium dioxide modified with zinc ions and gold nanoparticles, synthesized by sol-gel method, were used to determine the concentration of Cu (II) in liquids by stripping voltammetry method. Determination of Cu (II) was done using background solutions based on 0.4 M formic acid and ammonium acetate buffer (pH = 7.5) using the standard addition method with a potential scanning speed of 50 mV•s-1. The solution was stirred during the preliminary electrolysis at a potential of -1400 mV (vs silver-chloride reference electrode) for 120 seconds and then the potential was scanned from -1200 mV to + 200 mV. It is shown that the background solution based on ammonium acetate buffer provides a higher sensitivity and a good selectivity of peaks for the determination of copper compared to the background solution based on formic acid. Determined that value of the analytical signal of copper in the studied model solutions based on ammonium acetate and formic acid is proportional to the concentration of copper ions in the solution. To increase the selectivity of stripping voltammetry method in determining copper concentrations in solutions, an inversion spectral photoelectrochemical method was proposed, the essence of which is preliminary electroconcentration of the elements under investigation in the cathode potential region and subsequent measurement of the spectral photoelectrochemical characteristics of electroconcentration products. It has been found that in solutions of 1M ammonium acetate containing Cu2+ ions, the cathodic polarization of TiO2-based photoelectrode leads to the appearance of a cathode photocurrent and the values of photocurrent quantum yield increase with increasing content of copper ions in the solution. The spectral sensitivity of the surface layer corresponds to the absorption spectrum of Cu2O. The sensitivity of stripping voltammetry method to copper Cu (II) using the materials studied was 0.3 mg•l-1. It is shown that the inversion photoelectrochemical method is promising in the selective determination of copper concentration in liquids. Electrode materials based on titanium dioxide modified with zinc ions and gold nanoparticles, synthesized by sol-gel method, were used to determine the concentration of Cu (II) in liquids by stripping voltammetry method. Determination of Cu (II) was done using background solutions based on 0.4 M formic acid and ammonium acetate buffer (pH = 7.5) using the standard addition method with a potential scanning speed of 50 mV•s-1. The solution was stirred during the preliminary electrolysis at a potential of -1400 mV (vs silver-chloride reference electrode) for 120 seconds and then the potential was scanned from -1200 mV to + 200 mV. It is shown that the background solution based on ammonium acetate buffer provides a higher sensitivity and a good selectivity of peaks for the determination of copper compared to the background solution based on formic acid. Determined that value of the analytical signal of copper in the studied model solutions based on ammonium acetate and formic acid is proportional to the concentration of copper ions in the solution. To increase the selectivity of stripping voltammetry method in determining copper concentrations in solutions, an inversion spectral photoelectrochemical method was proposed, the essence of which is preliminary electroconcentration of the elements under investigation in the cathode potential region and subsequent measurement of the spectral photoelectrochemical characteristics of electroconcentration products. It has been found that in solutions of 1M ammonium acetate containing Cu2+ ions, the cathodic polarization of TiO2-based photoelectrode leads to the appearance of a cathode photocurrent and the values of photocurrent quantum yield increase with increasing content of copper ions in the solution. The spectral sensitivity of the surface layer corresponds to the absorption spectrum of Cu2O. The sensitivity of stripping voltammetry method to copper Cu (II) using the materials studied was 0.3 mg•l-1. It is shown that the inversion photoelectrochemical method is promising in the selective determination of copper concentration in liquids. V.I.Vernadsky Institute of General and Inorganic Chemistry 2019-08-15 Article Article Physical chemistry Физическая xимия Фізична xімія application/pdf https://ucj.org.ua/index.php/journal/article/view/61 10.33609/0041-6045.85.7.2019.24-30 Ukrainian Chemistry Journal; Vol 85 No 7 (2019): Ukrainian Chemistry Journal; 24-30 Украинский химический журнал; Том 85 № 7 (2019): Украинский химический журнал; 24-30 Український хімічний журнал; Том 85 № 7 (2019): Український хімічний журнал; 24-30 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/61/38 |