{"title":"基于抑制背景光电流的 Cr（Ⅵ）灵敏光电化学检测技术","authors":"","doi":"10.1016/j.microc.2024.111522","DOIUrl":null,"url":null,"abstract":"<div><p>A photoelectrochemical (PEC) sensor based on a BiVO<sub>4</sub> semiconductor and gold nanoparticles (AuNPs) was successfully prepared for the sensitive detection of Cr(Ⅵ) ions. The calcination temperature was found to be very important for the PEC properties of BiVO<sub>4</sub>. The BiVO<sub>4</sub>-modified indium tin oxide electrode (ITO/BiVO<sub>4</sub>) calcined at 300 °C generated a low cathodic photocurrent response under light irradiation. BiVO<sub>4</sub>/AuNPs materials were coupled via electrostatic adsorption to enhance the photoelectric conversion performance of BiVO<sub>4</sub>. The use of self-assembled monolayers (SAMs) to modify electrodes reduce the background current. The developed ITO/BiVO<sub>4</sub>/AuNPs/L-Cys PEC sensor was used to detect of Cr(VI). The Cr(Ⅵ) ion concentrations showed a good linearity between 10 pM and 1 μM with a detection limit of 9.1 pM (S/N = 3). The prepared PEC sensor exhibited high sensitivity, a wide linear range, and good selectivity. This work provides a promising platform for the analytical detection of heavy metal ions.</p></div>","PeriodicalId":391,"journal":{"name":"Microchemical Journal","volume":null,"pages":null},"PeriodicalIF":4.9000,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Sensitive photoelectrochemical detection of Cr(Ⅵ) based on the suppression of background photocurrent\",\"authors\":\"\",\"doi\":\"10.1016/j.microc.2024.111522\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>A photoelectrochemical (PEC) sensor based on a BiVO<sub>4</sub> semiconductor and gold nanoparticles (AuNPs) was successfully prepared for the sensitive detection of Cr(Ⅵ) ions. The calcination temperature was found to be very important for the PEC properties of BiVO<sub>4</sub>. The BiVO<sub>4</sub>-modified indium tin oxide electrode (ITO/BiVO<sub>4</sub>) calcined at 300 °C generated a low cathodic photocurrent response under light irradiation. BiVO<sub>4</sub>/AuNPs materials were coupled via electrostatic adsorption to enhance the photoelectric conversion performance of BiVO<sub>4</sub>. The use of self-assembled monolayers (SAMs) to modify electrodes reduce the background current. The developed ITO/BiVO<sub>4</sub>/AuNPs/L-Cys PEC sensor was used to detect of Cr(VI). The Cr(Ⅵ) ion concentrations showed a good linearity between 10 pM and 1 μM with a detection limit of 9.1 pM (S/N = 3). The prepared PEC sensor exhibited high sensitivity, a wide linear range, and good selectivity. This work provides a promising platform for the analytical detection of heavy metal ions.</p></div>\",\"PeriodicalId\":391,\"journal\":{\"name\":\"Microchemical Journal\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.9000,\"publicationDate\":\"2024-08-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Microchemical Journal\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0026265X24016345\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, ANALYTICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microchemical Journal","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0026265X24016345","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
Sensitive photoelectrochemical detection of Cr(Ⅵ) based on the suppression of background photocurrent
A photoelectrochemical (PEC) sensor based on a BiVO4 semiconductor and gold nanoparticles (AuNPs) was successfully prepared for the sensitive detection of Cr(Ⅵ) ions. The calcination temperature was found to be very important for the PEC properties of BiVO4. The BiVO4-modified indium tin oxide electrode (ITO/BiVO4) calcined at 300 °C generated a low cathodic photocurrent response under light irradiation. BiVO4/AuNPs materials were coupled via electrostatic adsorption to enhance the photoelectric conversion performance of BiVO4. The use of self-assembled monolayers (SAMs) to modify electrodes reduce the background current. The developed ITO/BiVO4/AuNPs/L-Cys PEC sensor was used to detect of Cr(VI). The Cr(Ⅵ) ion concentrations showed a good linearity between 10 pM and 1 μM with a detection limit of 9.1 pM (S/N = 3). The prepared PEC sensor exhibited high sensitivity, a wide linear range, and good selectivity. This work provides a promising platform for the analytical detection of heavy metal ions.
期刊介绍：
The Microchemical Journal is a peer reviewed journal devoted to all aspects and phases of analytical chemistry and chemical analysis. The Microchemical Journal publishes articles which are at the forefront of modern analytical chemistry and cover innovations in the techniques to the finest possible limits. This includes fundamental aspects, instrumentation, new developments, innovative and novel methods and applications including environmental and clinical field.
Traditional classical analytical methods such as spectrophotometry and titrimetry as well as established instrumentation methods such as flame and graphite furnace atomic absorption spectrometry, gas chromatography, and modified glassy or carbon electrode electrochemical methods will be considered, provided they show significant improvements and novelty compared to the established methods.
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