In this study,a highly efficient La-Fe_(2)O_(3)/dielectric barrier discharge(DBD)/honeycomb ce-ramic plate synergistic catalytic systemwas successfully constructed by using modified iron oxide(Fe_(2)O_(3))catalyst coa...In this study,a highly efficient La-Fe_(2)O_(3)/dielectric barrier discharge(DBD)/honeycomb ce-ramic plate synergistic catalytic systemwas successfully constructed by using modified iron oxide(Fe_(2)O_(3))catalyst coating assisted DBD plasma,and the prepared catalytic coating was fully characterized by various techniques.The results indicate that the lanthanum(La)is efficiently and uniformly doped in Fe_(2)O_(3),and the modified La-Fe_(2)O_(3)catalyst exhibited a better photocatalytic performance.The overuse of Thiamphenicol(TAP),as a typical chlo-ramphenicol antibiotic,has led to its accumulation in the aquatic environment.Accordingly,TAPwas selected as the target contaminant to evaluate the catalytic activity of the synergis-tic system.The results confirmed that the catalytic ability of the synergistic catalytic system was significantly improved,and the data showed that the degradation rate of the synergis-tic system reached 99.1%under the same conditions compared with 68.2%for the single DBD plasma,which effectively improved low energy efficiency limitations of the single DBD technology.Through quantitative measurements of the concentrations of dissolved ozone(O3)and hydrogen peroxide(H_(2)O_(2))in the system and radical trapping experiments,com-bined with emission spectroscopy,the mechanism of synergistic system degradation of TAP was analyzed.The intermediates in the degradation process were characterized by high-resolution mass spectrometry,and the degradation pathway of TAP was proposed based on the analysis of the intermediates and their combination with theoretical calculations.This study presents a theoretical basis for the improvement of DBD technology and a technical guide for the removal process of antibiotics from industrial wastewater.展开更多
A near-infrared germanium(Ge)Schottky photodetector(PD)with an ultrathin silicon(Si)barrier enhancement layer between the indium-doped tin oxide(ITO)electrode and Ge epilayer on Si or silicon-on-insulator(SOI)is propo...A near-infrared germanium(Ge)Schottky photodetector(PD)with an ultrathin silicon(Si)barrier enhancement layer between the indium-doped tin oxide(ITO)electrode and Ge epilayer on Si or silicon-on-insulator(SOI)is proposed and fabricated.The well-behaved ITO/Si cap/Ge Schottky junctions without intentional doping process for the Ge epilayer are formed on the Si and SOI substrates.The Si-and SOI-based ITO/Si cap/Ge Schottky PDs exhibit low dark current densities of 33 mA/cm2 and 44 mA/cm2,respectively.Benefited from the high transmissivity of ITO electrode and the reflectivity of SOI substrate,an optical responsivity of 0.19 A/W at 1550 nm wavelength is obtained for the SOI-based ITO/Si cap/Ge Schottky PD.These complementary metal–oxide–semiconductor(CMOS)compatible Si(or SOI)-based ITO/Si cap/Ge Schottky PDs are quite useful for detecting near-infrared wavelengths with high efficiency.展开更多
基金supported by the National Natural Science Foundation of China(Nos.51978386 and U1906224).
文摘In this study,a highly efficient La-Fe_(2)O_(3)/dielectric barrier discharge(DBD)/honeycomb ce-ramic plate synergistic catalytic systemwas successfully constructed by using modified iron oxide(Fe_(2)O_(3))catalyst coating assisted DBD plasma,and the prepared catalytic coating was fully characterized by various techniques.The results indicate that the lanthanum(La)is efficiently and uniformly doped in Fe_(2)O_(3),and the modified La-Fe_(2)O_(3)catalyst exhibited a better photocatalytic performance.The overuse of Thiamphenicol(TAP),as a typical chlo-ramphenicol antibiotic,has led to its accumulation in the aquatic environment.Accordingly,TAPwas selected as the target contaminant to evaluate the catalytic activity of the synergis-tic system.The results confirmed that the catalytic ability of the synergistic catalytic system was significantly improved,and the data showed that the degradation rate of the synergis-tic system reached 99.1%under the same conditions compared with 68.2%for the single DBD plasma,which effectively improved low energy efficiency limitations of the single DBD technology.Through quantitative measurements of the concentrations of dissolved ozone(O3)and hydrogen peroxide(H_(2)O_(2))in the system and radical trapping experiments,com-bined with emission spectroscopy,the mechanism of synergistic system degradation of TAP was analyzed.The intermediates in the degradation process were characterized by high-resolution mass spectrometry,and the degradation pathway of TAP was proposed based on the analysis of the intermediates and their combination with theoretical calculations.This study presents a theoretical basis for the improvement of DBD technology and a technical guide for the removal process of antibiotics from industrial wastewater.
基金Project supported by the National Key Research and Development Program of China(Grant No.2018YFB2200103)the National Natural Science Foundation of China(Grant No.61474094)Principal Fund of Minnan Normal University(Grant No.KJ2020006).
文摘A near-infrared germanium(Ge)Schottky photodetector(PD)with an ultrathin silicon(Si)barrier enhancement layer between the indium-doped tin oxide(ITO)electrode and Ge epilayer on Si or silicon-on-insulator(SOI)is proposed and fabricated.The well-behaved ITO/Si cap/Ge Schottky junctions without intentional doping process for the Ge epilayer are formed on the Si and SOI substrates.The Si-and SOI-based ITO/Si cap/Ge Schottky PDs exhibit low dark current densities of 33 mA/cm2 and 44 mA/cm2,respectively.Benefited from the high transmissivity of ITO electrode and the reflectivity of SOI substrate,an optical responsivity of 0.19 A/W at 1550 nm wavelength is obtained for the SOI-based ITO/Si cap/Ge Schottky PD.These complementary metal–oxide–semiconductor(CMOS)compatible Si(or SOI)-based ITO/Si cap/Ge Schottky PDs are quite useful for detecting near-infrared wavelengths with high efficiency.
