A novel complex process of electrodeposition and biofilm is utilized to treat organic wastewater containing Cr 3+, and its purifying mechanism is also described in this article. In details, organic materials in was...A novel complex process of electrodeposition and biofilm is utilized to treat organic wastewater containing Cr 3+, and its purifying mechanism is also described in this article. In details, organic materials in wastewater are consumed as nutritious source by biofilm composed of microorganism and EPS (extracellular polysaccharide substance). While one part of heavy metal ions, such as Cr 3+, is removed by electrodeposition, the other part is adsorbed on biofilm. In contrast, experimental data of single electrodeposition or biofilm process are listed. Further, the kinetic curves of microbes cultivated or microbes acclimated by Cr 3+ to degrade glucose are provided,too. In conclusion, the experimental results indicate that initial wastewater consists of C 6H 12O 6 (500 mg·L -1), Cr 3+ (10 mg·L -1), after treated with the complex process, concentrations of C 6H 12O 6 and Cr 3+ are on the scale of 15-20 mg·L -1, and less than 1 mg·L -1, respectively. Purified water can meet the standards of industrial reused water.展开更多
A novel complex process of electrodeposition and biofilm is utilized to treat organic wastewater containing Cr 3+, and its purifying mechanism is also described in this article. In details, organic materials in was...A novel complex process of electrodeposition and biofilm is utilized to treat organic wastewater containing Cr 3+, and its purifying mechanism is also described in this article. In details, organic materials in wastewater are consumed as nutritious source by biofilm composed of microorganism and EPS (extracellular polysaccharide substance). While one part of heavy metal ions, such as Cr 3+, is removed by electrodeposition, the other part is adsorbed on biofilm. In contrast, experimental data of single electrodeposition or biofilm process are listed. Further, the kinetic curves of microbes cultivated or microbes acclimated by Cr 3+ to degrade glucose are provided,too. In conclusion, the experimental results indicate that initial wastewater consists of C 6H 12O 6 (500 mg·L -1), Cr 3+ (10 mg·L -1), after treated with the complex process, concentrations of C 6H 12O 6 and Cr 3+ are on the scale of 15-20 mg·L -1, and less than 1 mg·L -1, respectively. Purified water can meet the standards of industrial reused water.展开更多
A new method of preparing thin film metal-hydride electrodes for metal-hydride batteries is described. The method consists of simultaneous deposition of multi-component metallic species onto a substrate while bombardi...A new method of preparing thin film metal-hydride electrodes for metal-hydride batteries is described. The method consists of simultaneous deposition of multi-component metallic species onto a substrate while bombarding the growing, deposited thin film electrode with a low energy hydrogen ion beam An amorphous LaNi4 hydride thin film electrode has been prepared by this Hydrogen Ion Beam Assisted Deposition (HIBAD) technique. The electrochemical discharge capacity and cycle life of this electrode in a 6 M KOH solution surpass previously reported values for La-Ni thin film electrodes prepared by other deposition methods.展开更多
Despite the advances of aqueous zinc(Zn)batteries as sustainable energy storage systems,their practical application remains challenging due to the issues of spontaneous corrosion and dendritic deposits at the Zn metal...Despite the advances of aqueous zinc(Zn)batteries as sustainable energy storage systems,their practical application remains challenging due to the issues of spontaneous corrosion and dendritic deposits at the Zn metal anode.In this work,conformal growth of zinc hydroxide sulfate(ZHS)with dominating(001)facet was realized on(002)plane-dominated Zn metal foil fabricated through a facile thermal annealing process.The ZHS possessed high Zn^(2+)conductivity(16.9 mS cm^(-1))and low electronic conductivity(1.28×10^(4)Ωcm),and acted as a heterogeneous and robust solid electrolyte interface(SEI)layer on metallic Zn electrode,which regulated the electrochemical Zn plating behavior and suppressed side reactions simultaneously.Moreover,low self-diffusion barrier along the(002)plane promoted the 2D diffusion and horizontal electrochemical plating of metallic Zn for(002)-textured Zn electrode.Consequently,the as-achieved Zn electrode exhibited remarkable cycling stability over 7000 cycles at 2 mA cm^(-2)and 0.5 mAh cm^(-2)with a low overpotential of 25 mV in symmetric cells.Pairing with a MnO_(2)cathode,the as-achieved Zn electrode achieved stable cell cycling with 92.7%capacity retention after 1000 cycles at 10 C with a remarkable average Coulombic efficiency of 99.9%.展开更多
文摘A novel complex process of electrodeposition and biofilm is utilized to treat organic wastewater containing Cr 3+, and its purifying mechanism is also described in this article. In details, organic materials in wastewater are consumed as nutritious source by biofilm composed of microorganism and EPS (extracellular polysaccharide substance). While one part of heavy metal ions, such as Cr 3+, is removed by electrodeposition, the other part is adsorbed on biofilm. In contrast, experimental data of single electrodeposition or biofilm process are listed. Further, the kinetic curves of microbes cultivated or microbes acclimated by Cr 3+ to degrade glucose are provided,too. In conclusion, the experimental results indicate that initial wastewater consists of C 6H 12O 6 (500 mg·L -1), Cr 3+ (10 mg·L -1), after treated with the complex process, concentrations of C 6H 12O 6 and Cr 3+ are on the scale of 15-20 mg·L -1, and less than 1 mg·L -1, respectively. Purified water can meet the standards of industrial reused water.
文摘A novel complex process of electrodeposition and biofilm is utilized to treat organic wastewater containing Cr 3+, and its purifying mechanism is also described in this article. In details, organic materials in wastewater are consumed as nutritious source by biofilm composed of microorganism and EPS (extracellular polysaccharide substance). While one part of heavy metal ions, such as Cr 3+, is removed by electrodeposition, the other part is adsorbed on biofilm. In contrast, experimental data of single electrodeposition or biofilm process are listed. Further, the kinetic curves of microbes cultivated or microbes acclimated by Cr 3+ to degrade glucose are provided,too. In conclusion, the experimental results indicate that initial wastewater consists of C 6H 12O 6 (500 mg·L -1), Cr 3+ (10 mg·L -1), after treated with the complex process, concentrations of C 6H 12O 6 and Cr 3+ are on the scale of 15-20 mg·L -1, and less than 1 mg·L -1, respectively. Purified water can meet the standards of industrial reused water.
文摘A new method of preparing thin film metal-hydride electrodes for metal-hydride batteries is described. The method consists of simultaneous deposition of multi-component metallic species onto a substrate while bombarding the growing, deposited thin film electrode with a low energy hydrogen ion beam An amorphous LaNi4 hydride thin film electrode has been prepared by this Hydrogen Ion Beam Assisted Deposition (HIBAD) technique. The electrochemical discharge capacity and cycle life of this electrode in a 6 M KOH solution surpass previously reported values for La-Ni thin film electrodes prepared by other deposition methods.
基金financial support by the Innovation Fund of Wuhan National Laboratory for Optoelectronics of Huazhong University of Science and Technologythe China Postdoctoral Science Foundation (2018M640694 and 2020T130223)+1 种基金support of the Singapore National Research Foundation (NRF-NRFF2017-04)Agency for Science, Technology and Research (Central Research Fund Award)
文摘Despite the advances of aqueous zinc(Zn)batteries as sustainable energy storage systems,their practical application remains challenging due to the issues of spontaneous corrosion and dendritic deposits at the Zn metal anode.In this work,conformal growth of zinc hydroxide sulfate(ZHS)with dominating(001)facet was realized on(002)plane-dominated Zn metal foil fabricated through a facile thermal annealing process.The ZHS possessed high Zn^(2+)conductivity(16.9 mS cm^(-1))and low electronic conductivity(1.28×10^(4)Ωcm),and acted as a heterogeneous and robust solid electrolyte interface(SEI)layer on metallic Zn electrode,which regulated the electrochemical Zn plating behavior and suppressed side reactions simultaneously.Moreover,low self-diffusion barrier along the(002)plane promoted the 2D diffusion and horizontal electrochemical plating of metallic Zn for(002)-textured Zn electrode.Consequently,the as-achieved Zn electrode exhibited remarkable cycling stability over 7000 cycles at 2 mA cm^(-2)and 0.5 mAh cm^(-2)with a low overpotential of 25 mV in symmetric cells.Pairing with a MnO_(2)cathode,the as-achieved Zn electrode achieved stable cell cycling with 92.7%capacity retention after 1000 cycles at 10 C with a remarkable average Coulombic efficiency of 99.9%.