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Investigation of nitrate removal in water by CuO-Co3O4 modified titanium-based nanoelectrode
In this study, a CuO-Co3O4 modified titanium-based nanoelectrode(CuO-Co3O4@TBNE) was synthesized by two hydrothermal and calcination methods based on the metal organic framework(MOF) synthesis route. XRD and XPS characterization indicated that the electrode surface was composed of Co3O4 and Cu2+. SEM and EDS characterization revealed that Cu element with a mass fraction of approximately 7.85% was loaded onto Co3O4 nanorods. The electrocatalytic reduction ability of the electrode for NO3--N in water was tested using linear sweep voltammetry, and was found to have high current response density and exhibit strong electrochemical activity. It was used for electrocatalytic reduction to remove nitrate from water. The results showed that under the conditions of pH=7, current density of 10 mA/cm2, and initial mass concentration of NO3--N 50 mg/L, the removal rate of NO3--N reached 99.73% after electrolysis for 2 hours. The electrode could work in a wide range of acidity and alkalinity, and the electrochemical reduction effect was better under neutral and acidic conditions than under alkaline conditions. In addition, when adding Cl- with a mass concentration of 1 000 mg/L, the total nitrogen removal rate of 93.7% could be achieved. The hydrogen atom radical scavenging experiment using tertiary butanol(TBA) showed that the reduction of NO3--N by the electrode catalytic system mainly followed the direct electron reduction pathway. The CuO-Co3O4@TBNE electrode showed good stability and extremely low metal leaching in 10 cycles.
Investigation of nitrate removal in water by CuO-Co3O4 modified titanium-based nanoelectrode
In this study, a CuO-Co3O4 modified titanium-based nanoelectrode(CuO-Co3O4@TBNE) was synthesized by two hydrothermal and calcination methods based on the metal organic framework(MOF) synthesis route. XRD and XPS characterization indicated that the electrode surface was composed of Co3O4 and Cu2+. SEM and EDS characterization revealed that Cu element with a mass fraction of approximately 7.85% was loaded onto Co3O4 nanorods. The electrocatalytic reduction ability of the electrode for NO3--N in water was tested using linear sweep voltammetry, and was found to have high current response density and exhibit strong electrochemical activity. It was used for electrocatalytic reduction to remove nitrate from water. The results showed that under the conditions of pH=7, current density of 10 mA/cm2, and initial mass concentration of NO3--N 50 mg/L, the removal rate of NO3--N reached 99.73% after electrolysis for 2 hours. The electrode could work in a wide range of acidity and alkalinity, and the electrochemical reduction effect was better under neutral and acidic conditions than under alkaline conditions. In addition, when adding Cl- with a mass concentration of 1 000 mg/L, the total nitrogen removal rate of 93.7% could be achieved. The hydrogen atom radical scavenging experiment using tertiary butanol(TBA) showed that the reduction of NO3--N by the electrode catalytic system mainly followed the direct electron reduction pathway. The CuO-Co3O4@TBNE electrode showed good stability and extremely low metal leaching in 10 cycles.
Investigation of nitrate removal in water by CuO-Co3O4 modified titanium-based nanoelectrode
LIU Songlin (author) / YANG Qingfeng (author) / QIU Huiqiang (author) / SUN Yuwen (author) / LIU Yangqiao (author)
2025
Article (Journal)
Electronic Resource
Unknown
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