The electrochemiluminescence （ECL） of the Ru（phen）3^2＋/thymine （T） system at bare and graphene oxide （GO）-modified glassy carbon （GC） electrodes was utilized to determine Hg2＋ in tap water. The ECL intensi...The electrochemiluminescence （ECL） of the Ru（phen）3^2＋/thymine （T） system at bare and graphene oxide （GO）-modified glassy carbon （GC） electrodes was utilized to determine Hg2＋ in tap water. The ECL intensity of Ru（phen）3^2＋ was considerably enhanced by the addition of thymine because of the occurrence of ECL tion between them. Subsequently, the ECL intensity of Ru（phen）3^2＋/T system rapidly decreased with the addition of Ru（phen）3^2＋ because of the formation ofa T-Hg^2＋-T complex. A linear response （R2=0.9914） was obtained over a Hg^2＋ concentration range of 1.0×10 9 mol/L to 1.0×10^-5 mol/L with a detection limit of 3.4×10^-10 mol/L at a bare GC electrode in 0.1 mol/L phosphate buffer （pH=8.0）. The detection limit can be further reduced to 4.2 ×10^-12 mol/L after modification of the GC electrode by GO. To verify its applicability, the proposed method was utilized to determine Hg^2＋ in tap water and simulated wastewater. The method exhibited good reproducibility and stability and thus reveals the possibility of developing a novel ECL detection method for Hg^2＋.展开更多
The Ru（bpy）3^2＋ doped graphene oxide-silica composite film（Ru/GO-SiCF） was synthesized by one pot hydrolysis and condensation of tetraethylorthosilicate（TEOS） in the water-alcohol solution of graphene oxide and...The Ru（bpy）3^2＋ doped graphene oxide-silica composite film（Ru/GO-SiCF） was synthesized by one pot hydrolysis and condensation of tetraethylorthosilicate（TEOS） in the water-alcohol solution of graphene oxide and Ru（bpy）3^2＋ at room temperature.The prepared Ru/GO-SiCF modified glassy carbon electrode（GCE） showed excellent electrochemiluminescence（ECL） behavior for the determination of tripropylamine（TPA） with high sensitivity and good stability.We expected this simple and novel material will find further application in construction of other targets sensors.展开更多
文摘The electrochemiluminescence （ECL） of the Ru（phen）3^2＋/thymine （T） system at bare and graphene oxide （GO）-modified glassy carbon （GC） electrodes was utilized to determine Hg2＋ in tap water. The ECL intensity of Ru（phen）3^2＋ was considerably enhanced by the addition of thymine because of the occurrence of ECL tion between them. Subsequently, the ECL intensity of Ru（phen）3^2＋/T system rapidly decreased with the addition of Ru（phen）3^2＋ because of the formation ofa T-Hg^2＋-T complex. A linear response （R2=0.9914） was obtained over a Hg^2＋ concentration range of 1.0×10 9 mol/L to 1.0×10^-5 mol/L with a detection limit of 3.4×10^-10 mol/L at a bare GC electrode in 0.1 mol/L phosphate buffer （pH=8.0）. The detection limit can be further reduced to 4.2 ×10^-12 mol/L after modification of the GC electrode by GO. To verify its applicability, the proposed method was utilized to determine Hg^2＋ in tap water and simulated wastewater. The method exhibited good reproducibility and stability and thus reveals the possibility of developing a novel ECL detection method for Hg^2＋.
基金supported in part by the Key Project of Natural Science Foundation of China(Nos.21175039,21322509, 21305035,21190044,and 21221003)Research Fund for the Doctoral Program of Higher Education of China(No. 20110161110016)+1 种基金the project supported by Hunan Provincial Natural Science FoundationHunan Provincial Science and Technology Plan of China(No.2012TT1003)
文摘The Ru（bpy）3^2＋ doped graphene oxide-silica composite film（Ru/GO-SiCF） was synthesized by one pot hydrolysis and condensation of tetraethylorthosilicate（TEOS） in the water-alcohol solution of graphene oxide and Ru（bpy）3^2＋ at room temperature.The prepared Ru/GO-SiCF modified glassy carbon electrode（GCE） showed excellent electrochemiluminescence（ECL） behavior for the determination of tripropylamine（TPA） with high sensitivity and good stability.We expected this simple and novel material will find further application in construction of other targets sensors.
