In this study,the electrochemical oxidation of reactive brilliant orange X-GN dye with a boron-doped diamond(BDD)anode was investigated.The BDD electrodes were deposited on the niobium(Nb)substrates by the hot filamen...In this study,the electrochemical oxidation of reactive brilliant orange X-GN dye with a boron-doped diamond(BDD)anode was investigated.The BDD electrodes were deposited on the niobium(Nb)substrates by the hot filament chemical vapor deposition method.The effects of processing parameters,such as film thickness,current density,supporting electrolyte concentration,initial solution pH,solution temperature,and initial dye concentration,were evaluated following the variation in the degradation efficiency.The microstructure and the electrochemical property of BDD were characterized by scanning electron microscopy,Raman spectroscopy,and electrochemical workstation;and the degradation of X-GN was estimated using UV-Vis spectrophotometry.Further,the results indicated that the film thickness of BDD had a significant impact on the electrolysis of X-GN.After 3 h of treatment,100%color and 63.2%total organic carbon removal was achieved under optimized experimental conditions:current density of 100 mA/cm2,supporting electrolyte concentration of 0.05 mol/L,initial solution pH 3.08,and solution temperature of 60°C.展开更多
Chitosan-montmorillonite(CS-MMT) hybrid was prepared and characterized by XRD,FTIR and TG.The results showed that chitosan was intercalated into the layer structure of Na+-montmorillonite.The ability of CS-MMT hybrid ...Chitosan-montmorillonite(CS-MMT) hybrid was prepared and characterized by XRD,FTIR and TG.The results showed that chitosan was intercalated into the layer structure of Na+-montmorillonite.The ability of CS-MMT hybrid as an adsorbent for the removal of reactive orange X-GN from aqueous solution has been studied.The effects of various parameters such as initial concentration and temperature were also studied.The Langmuir and Freundlich adsorption isotherms have been used to fit the experimental data,and the former giving the higher correlation.Thermodynamic parameters of the adsorption process,ΔG°,ΔH° and ΔS° were determined to be-24.90 kJ·mol-1(at 20℃),10.58 kJ·mol-1 and 121.0 J·mol-1·K-1,respectively.The results indicated that the adsorption of reactive orange X-GN on CS-MMT hybrid was spontaneous.展开更多
基金Project(2016YEB0301402) supported by the National Key Research and Development Program of ChinaProject(51601226) supported by the National Natural Science Foundation of China+1 种基金Project supported by the Open-End Fund for the Valuable and Precision Instruments of Central South University,ChinaProject supported by State Key Laboratory of Powder Metallurgy,China
文摘In this study,the electrochemical oxidation of reactive brilliant orange X-GN dye with a boron-doped diamond(BDD)anode was investigated.The BDD electrodes were deposited on the niobium(Nb)substrates by the hot filament chemical vapor deposition method.The effects of processing parameters,such as film thickness,current density,supporting electrolyte concentration,initial solution pH,solution temperature,and initial dye concentration,were evaluated following the variation in the degradation efficiency.The microstructure and the electrochemical property of BDD were characterized by scanning electron microscopy,Raman spectroscopy,and electrochemical workstation;and the degradation of X-GN was estimated using UV-Vis spectrophotometry.Further,the results indicated that the film thickness of BDD had a significant impact on the electrolysis of X-GN.After 3 h of treatment,100%color and 63.2%total organic carbon removal was achieved under optimized experimental conditions:current density of 100 mA/cm2,supporting electrolyte concentration of 0.05 mol/L,initial solution pH 3.08,and solution temperature of 60°C.
文摘Chitosan-montmorillonite(CS-MMT) hybrid was prepared and characterized by XRD,FTIR and TG.The results showed that chitosan was intercalated into the layer structure of Na+-montmorillonite.The ability of CS-MMT hybrid as an adsorbent for the removal of reactive orange X-GN from aqueous solution has been studied.The effects of various parameters such as initial concentration and temperature were also studied.The Langmuir and Freundlich adsorption isotherms have been used to fit the experimental data,and the former giving the higher correlation.Thermodynamic parameters of the adsorption process,ΔG°,ΔH° and ΔS° were determined to be-24.90 kJ·mol-1(at 20℃),10.58 kJ·mol-1 and 121.0 J·mol-1·K-1,respectively.The results indicated that the adsorption of reactive orange X-GN on CS-MMT hybrid was spontaneous.
