A method for immobilizing Bromophenol Blue(BPB)on glassy carbon electrode(GCE)was studied.BPB can be deposited on pretreated GCE by cyclic voltammetry.High acidity is favorable for the deposition.The formed electrode(...A method for immobilizing Bromophenol Blue(BPB)on glassy carbon electrode(GCE)was studied.BPB can be deposited on pretreated GCE by cyclic voltammetry.High acidity is favorable for the deposition.The formed electrode(BPB/GCE)gives a pair of well-defined peaks when scanned in phosphate buffer solution(PBS).Two electrons and two protons are involved in this process.The BPB/GCE shows an good stability and electroctalytic activity toward the oxidation of NADH in phosphate buffer solution.展开更多
Electron transfer process between dopamine covalently modified on thioctic acid self-assembled monolayers has been investigated.The electrochemical oxidation of dopamine on self-assembled monolayers modified electrode...Electron transfer process between dopamine covalently modified on thioctic acid self-assembled monolayers has been investigated.The electrochemical oxidation of dopamine on self-assembled monolayers modified electrodes is a two-step single electron transfer process,in which the intermediate of semiquinone and hydrogen proton are concerned.展开更多
文摘A method for immobilizing Bromophenol Blue(BPB)on glassy carbon electrode(GCE)was studied.BPB can be deposited on pretreated GCE by cyclic voltammetry.High acidity is favorable for the deposition.The formed electrode(BPB/GCE)gives a pair of well-defined peaks when scanned in phosphate buffer solution(PBS).Two electrons and two protons are involved in this process.The BPB/GCE shows an good stability and electroctalytic activity toward the oxidation of NADH in phosphate buffer solution.
文摘Electron transfer process between dopamine covalently modified on thioctic acid self-assembled monolayers has been investigated.The electrochemical oxidation of dopamine on self-assembled monolayers modified electrodes is a two-step single electron transfer process,in which the intermediate of semiquinone and hydrogen proton are concerned.
文摘以Sn粒和Zn粒为原料,在柠檬酸体系中,用溶胶凝胶法合成了纳米ZnSnO3粉体.用XRD、TEM对产物的组成、粒径大小、形貌进行了表征.结果表明:产物为平均粒径10 nm左右的圆球形颗粒.采用静态配气法测试了不同烧结温度下材料对氧化性气体的气敏性能,发现烧结温度为700℃的纳米ZnSnO3材料在最佳工作温度为360℃对体积分数为5×10-5的氯气的灵敏度高达1 973,而且对其他气体有很好的抗干扰能力.元件的响应恢复特性良好,响应时间和恢复时间分别为2 s和10 s.
