Surveys on antibiotics have become one of the most popular topics in the recent two decades. From 1998 to 2018, more than 5,000 articles concentrated on the research of antibiotic wastewater treatment have been publis...Surveys on antibiotics have become one of the most popular topics in the recent two decades. From 1998 to 2018, more than 5,000 articles concentrated on the research of antibiotic wastewater treatment have been published. Among them, photocatalysis has received much attention due to its green and environmental-friendly properties. In this mini-review, the recent progress of photocatalysis in antibiotic wastewater was summarized, including antibiotics degradation and hydrogen energy conversion. The photocatalysts commonly used were also discussed. It can be mainly classified as TiO2-based materials, sulfides and polymeric carbon nitride-based materials and bismuth-contained materials. Four major types of antibiotics, tetracycline, sulfonamide, β-lactam and quinolone, were involved. Furthermore, perspectives concentrated on future development and challenges, especially converting antibiotics into hydrogen energy, were also proposed.展开更多
A two‐step photocatalytic water splitting system,termed a“Z‐scheme system”,was achieved using Zn‐doped g‐C3N4for H2evolution and BiVO4for O2evolution with Fe2+/Fe3+as a shuttle redox mediator.H2and O2were evalua...A two‐step photocatalytic water splitting system,termed a“Z‐scheme system”,was achieved using Zn‐doped g‐C3N4for H2evolution and BiVO4for O2evolution with Fe2+/Fe3+as a shuttle redox mediator.H2and O2were evaluated simultaneously when the doping amount of zinc was10%.Moreover,Zn‐doped(10%)g‐C3N4synthesized by an impregnation method showed superior active ability to form the Z‐scheme with BiVO4than by in‐situ synthesis.X‐ray diffraction,UV‐Vis spectroscopy,scanning electron microscopy,and X‐ray photoelectron spectroscopy were used to characterize the samples.It was determined that more Zn?N bonds could be formed on the surface of g‐C3N4by impregnation,which could facilitate charge transfer.展开更多
In this study,a ZnxCd1-xS solid solution was successfully synthesized using a hydrothermal method.MoS2 serving as a co-catalyst for hydrogen evolution was also prepared through a one-pot hydrothermal method.The struct...In this study,a ZnxCd1-xS solid solution was successfully synthesized using a hydrothermal method.MoS2 serving as a co-catalyst for hydrogen evolution was also prepared through a one-pot hydrothermal method.The structures,morphology,chemical states,and optical properties were characterized using powder X-ray diffraction,scanning electron microscopy,high-angle annular dark field-scanning transmission electron microscopy,elemental mapping,X-ray photoelectron spectroscopy,and UV-Vis diffuse reflection spectroscopy.Visible-light-driven photocatalytic experiments were conducted to simultaneously achieve hydrogen production and amoxicillin antibiotic wastewater degradation.The results indicated 8%MoS2/ZnxCd1-xS achieves the best photocatalytic performance.The ZnxCd1-xS samples illustrated a superior performance to that of CdS,which can be attributed to a thermodynamic improvement.Based on the results of PL and TRPL analyses,the enhancement of the hydrogen production mechanisms can be ascribed to the prolonged separation process of the photocarriers.Furthermore,the degradation results were analyzed using the HPLC method and the possible degradation pathways were determined through the HPLC-MS techniques.展开更多
Plasma-coupled catalysis is a promising volatile organic co mpounds(VOCs) removal technology because of its interactional principles of plasma decomposition and catalytic oxidation.However,the problem of harmful by-pr...Plasma-coupled catalysis is a promising volatile organic co mpounds(VOCs) removal technology because of its interactional principles of plasma decomposition and catalytic oxidation.However,the problem of harmful by-products is still in trouble.A series of rare earth doped RE-NiO_(x)(RE=Ce,Y,La) composite oxides were synthesized by metal organic frameworks(MOFs)-derived method for coupled plasma oxidation of benzene and by-product ozone removal.Compared with plasma alone,the 1%La-NiO_(x)catalyst shows the best enhancement of 50% for benzene conversion with complete removal of a maximum of 800 ppm ozone.The energy consumption for 90% benzene removal efficiency(η90%) is also reduced from 3600 to 1200 J/L.Characterization re sults of RE-NiO_(x) catalysts indicate that the doping of La causes interaction and synergistic effect between La and Ni,and the surface oxygen and lattice oxygen with defects play crucial roles in benzene oxidation and ozone decomposition,respectively.In addition,the decomposition mechanism of benzene and ozone under plasma is proposed.Plasma is responsible for the indiscriminate bond breaking in benzene and oxygen to form a variety of organic intermediates and ozone,while the La-NiO_(x) catalyst selectively oxidizes the intermediates to CO_(x)/H2O and decomposes the ozone into oxygen.展开更多
Surface reconstructed SrTiO_(3)nanocrystals were synthesized by a thermal treatment process in presence of NaBH_(4)and SrTiO_(3)nanocrystals.The surface reconstruction of SrTiO_(3)nanocrystals is attributed to the int...Surface reconstructed SrTiO_(3)nanocrystals were synthesized by a thermal treatment process in presence of NaBH_(4)and SrTiO_(3)nanocrystals.The surface reconstruction of SrTiO_(3)nanocrystals is attributed to the introduction of surface oxygen vacancies or Ti sites(such as Ti^(3+)and Ti^(2+))during the hydrogenation treatment process.The light absorption and the charge transfer ability of SrTiO_(3)nanocrystals are simultaneously enhanced due to surface oxygen vacancies or Ti sites(such as Ti^(3+)and Ti^(2+)),which are beneficial to photocatalytic water splitting.Meanwhile,these defects also change the redox potential of the photocatalysts.Since there existed a synergistic effect between the three,the ratio of hydrogen to oxygen production was also regulated.展开更多
文摘Surveys on antibiotics have become one of the most popular topics in the recent two decades. From 1998 to 2018, more than 5,000 articles concentrated on the research of antibiotic wastewater treatment have been published. Among them, photocatalysis has received much attention due to its green and environmental-friendly properties. In this mini-review, the recent progress of photocatalysis in antibiotic wastewater was summarized, including antibiotics degradation and hydrogen energy conversion. The photocatalysts commonly used were also discussed. It can be mainly classified as TiO2-based materials, sulfides and polymeric carbon nitride-based materials and bismuth-contained materials. Four major types of antibiotics, tetracycline, sulfonamide, β-lactam and quinolone, were involved. Furthermore, perspectives concentrated on future development and challenges, especially converting antibiotics into hydrogen energy, were also proposed.
基金supported by the National Natural Science Foundation of China (21773153)~~
文摘A two‐step photocatalytic water splitting system,termed a“Z‐scheme system”,was achieved using Zn‐doped g‐C3N4for H2evolution and BiVO4for O2evolution with Fe2+/Fe3+as a shuttle redox mediator.H2and O2were evaluated simultaneously when the doping amount of zinc was10%.Moreover,Zn‐doped(10%)g‐C3N4synthesized by an impregnation method showed superior active ability to form the Z‐scheme with BiVO4than by in‐situ synthesis.X‐ray diffraction,UV‐Vis spectroscopy,scanning electron microscopy,and X‐ray photoelectron spectroscopy were used to characterize the samples.It was determined that more Zn?N bonds could be formed on the surface of g‐C3N4by impregnation,which could facilitate charge transfer.
基金the National Natural Science Foundation of China (21773153)the National Key Basic Research and Development Program (2018YFB1502001) for the financial supportthe Funding support from Centre of Hydrogen Science, Shanghai Jiao Tong University, China~~
文摘In this study,a ZnxCd1-xS solid solution was successfully synthesized using a hydrothermal method.MoS2 serving as a co-catalyst for hydrogen evolution was also prepared through a one-pot hydrothermal method.The structures,morphology,chemical states,and optical properties were characterized using powder X-ray diffraction,scanning electron microscopy,high-angle annular dark field-scanning transmission electron microscopy,elemental mapping,X-ray photoelectron spectroscopy,and UV-Vis diffuse reflection spectroscopy.Visible-light-driven photocatalytic experiments were conducted to simultaneously achieve hydrogen production and amoxicillin antibiotic wastewater degradation.The results indicated 8%MoS2/ZnxCd1-xS achieves the best photocatalytic performance.The ZnxCd1-xS samples illustrated a superior performance to that of CdS,which can be attributed to a thermodynamic improvement.Based on the results of PL and TRPL analyses,the enhancement of the hydrogen production mechanisms can be ascribed to the prolonged separation process of the photocarriers.Furthermore,the degradation results were analyzed using the HPLC method and the possible degradation pathways were determined through the HPLC-MS techniques.
基金Project supported by the National Natural Science Foundation of China(22176123,U1832155)the National Key Research&Development Plan(2017YFC0211804).
文摘Plasma-coupled catalysis is a promising volatile organic co mpounds(VOCs) removal technology because of its interactional principles of plasma decomposition and catalytic oxidation.However,the problem of harmful by-products is still in trouble.A series of rare earth doped RE-NiO_(x)(RE=Ce,Y,La) composite oxides were synthesized by metal organic frameworks(MOFs)-derived method for coupled plasma oxidation of benzene and by-product ozone removal.Compared with plasma alone,the 1%La-NiO_(x)catalyst shows the best enhancement of 50% for benzene conversion with complete removal of a maximum of 800 ppm ozone.The energy consumption for 90% benzene removal efficiency(η90%) is also reduced from 3600 to 1200 J/L.Characterization re sults of RE-NiO_(x) catalysts indicate that the doping of La causes interaction and synergistic effect between La and Ni,and the surface oxygen and lattice oxygen with defects play crucial roles in benzene oxidation and ozone decomposition,respectively.In addition,the decomposition mechanism of benzene and ozone under plasma is proposed.Plasma is responsible for the indiscriminate bond breaking in benzene and oxygen to form a variety of organic intermediates and ozone,while the La-NiO_(x) catalyst selectively oxidizes the intermediates to CO_(x)/H2O and decomposes the ozone into oxygen.
基金This work was supported by the National Natural Science Foundation of China(Grant No.21773153)the National Key Research and Development Program of China(No.2018YFB1502001).
文摘Surface reconstructed SrTiO_(3)nanocrystals were synthesized by a thermal treatment process in presence of NaBH_(4)and SrTiO_(3)nanocrystals.The surface reconstruction of SrTiO_(3)nanocrystals is attributed to the introduction of surface oxygen vacancies or Ti sites(such as Ti^(3+)and Ti^(2+))during the hydrogenation treatment process.The light absorption and the charge transfer ability of SrTiO_(3)nanocrystals are simultaneously enhanced due to surface oxygen vacancies or Ti sites(such as Ti^(3+)and Ti^(2+)),which are beneficial to photocatalytic water splitting.Meanwhile,these defects also change the redox potential of the photocatalysts.Since there existed a synergistic effect between the three,the ratio of hydrogen to oxygen production was also regulated.
