多巴胺在纳米氧化锡修饰电极上的电化学行为
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摘要
以SnCl_45H_2O和NH_3H_2O为原料,采取水热法合成了SnO_2纳米材料,并制备了纳米材料修饰电极。实验结果表明,SnO_2纳米材料修饰电极对多巴胺电化学氧化过程具有良好的电催化性能。探讨pH值、修饰量、扫速等因素对多巴胺电化学行为的影响,得出了最佳的实验条件,并利用差分脉冲伏安法实现了对多巴胺的检测。结果表明,在1.0×10~(-5)～9.0×10~(-5)mol/L范围内,氧化峰电流与多巴胺浓度呈线性变化关系,相关系数可达0.991 4。
SnO_2 nanomaterials were synthesized with hydrothermal method by using SnCl_4 5H_2O and NH_3H_2O as raw materials, and nanomaterial modified electrodes were prepared. The experimental results show that the SnO_2 nanomaterial modified electrode has good electrocatalytic performance for dopamine electrochemical oxidation process. The effect of pH values, modification amount, sweep rate and other factors on the electrochemical behavior of dopamine were studied,the optimal experimental conditions were obtained and the detection of dopamine was achieved by differential pulse voltammetry. The results showed that the oxidation peak current and the dopamine concentration varied linearly in the concentration range of 1.0×10~(-5)-9.0×10~(-5) mol/L, and the correlation coefficient can reach 0.991 4.
SnO_2 nanomaterials were synthesized with hydrothermal method by using SnCl_4 5H_2O and NH_3H_2O as raw materials, and nanomaterial modified electrodes were prepared. The experimental results show that the SnO_2 nanomaterial modified electrode has good electrocatalytic performance for dopamine electrochemical oxidation process. The effect of pH values, modification amount, sweep rate and other factors on the electrochemical behavior of dopamine were studied,the optimal experimental conditions were obtained and the detection of dopamine was achieved by differential pulse voltammetry. The results showed that the oxidation peak current and the dopamine concentration varied linearly in the concentration range of 1.0×10~(-5)-9.0×10~(-5) mol/L, and the correlation coefficient can reach 0.991 4.
引文
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[4]BHANJANA G,DILBAGHI N,SINGHAL N K,et al.Zinc oxide nanopillars as an electrocatalyst for direct redox sensing of cadmium[J].Journal of Industrial&Engineering Chemistry,2017,53:192-200.
[5]KUMAR S,BHANJANA G,DILBAGHI N,et al.Fabrication and characterization of highly sensitive and selective arsenic sensor based on ultra-thin graphene oxide nanosheets[J].Sensors&Actuators B Chemical,2016,227:29-34.
[6]BHANJANA G,DILBAGHI N,SINGHAL N K,et al.Copper oxide nanoblades as novel adsorbent material for cadmium removal[J].Ceramics International,2017,43(8):6075-6081.
[7]LIU Y,STEFANIC G,RATHOUSKY J,et al.Assembly of mesoporous indium tin oxide electrodes from nano-hydroxide building blocks[J].Chemical Science,2012,3(7):2367-2374.
[8]BHANJANA G,MEHTA N,ChAUDHARY G R,et al.Novel electrochemical sensing of arsenic ions using a simple graphite pencil electrode modified with tin oxide nanoneedles[J].Journal of Molecular Liquids,2018,264:198-204.
[9]彭莹,季露露,汪娇,等.双酚A在石墨烯修饰电极上的电化学行为[J].安徽工业大学学报(自然科学版),2017,34(4):356-359.
[10]EHANS M A,NAEEM R,KHALEDI H,et al.Fabrication of CoTiO3-TiO2composite films from a heterobimetallic single source precursor for electrochemical sensing of dopamine[J].Dalton Trans,2016,45(25):10222-10232.
[11]MAHESH K P O,SHOWN I,CHEN L C,et al.Flexible sensor for dopamine detection fabricated by the direct growth ofα-Fe2O3nanoparticles on carbon cloth[J].Applied Surface Science,2018,427:387-395.
[12]YANG C,Gu B X,ZHANG D,et al.Coaxial carbon fiber/ZnO nanorod as electrodes for electrochemical determination of dopamine[J].Analytical Methods,2016,8(3):650-655.
[13]BABAEI A,SOHRABI M.An electrospun alumina-borate oxide nanofiber and reduced graphene oxide composite modified carbon paste electrode as the electrochemical sensor for simultaneous determination of dopamine and noscapine[J].Analytical Methods,2016,8(21):328-335.
[14]NUMAN A,SHAHID M M,OMAR F S,et al.Facile fabrication of cobalt oxide nanograin-decorated reduced graphene oxide composite as ultrasensitive platform for dopamine detection[J].Sensors&Actuators B Chemical,2017,238:1043-1051.
[15]ROYCHOUDHURY A,BASU S,JHA S K.Dopamine biosensor based on surface functionalized nanostructured nickel oxide platform[J].Biosensors&Bioelectronics,2016,84:72-81.
[16]HOUCHENG D,LEI Z,ZHAORONG T,et al.Black phosphorus quantum dots doped ZnO nanoparticles as efficient electrode materials for sensitive hydrogen peroxide detection[J].Journal of Electroanalytical Chemistry,2018,824:161-168.
[17]PENG Y,TANG Z R,DONG Y P,et al.Electrochemical detection of hydroquinone based on MoS2/reduced graphene oxide nanocomposites[J].Journal of Electroanalytical Chemistry,2018,816:38-44.