The sulfate radical-based photocatalytic process is supposed to be the most promising way to degrade organic pollutants.However,the development of a suitable and efficient photocatalyst is very challenging.The 40LaFeO...The sulfate radical-based photocatalytic process is supposed to be the most promising way to degrade organic pollutants.However,the development of a suitable and efficient photocatalyst is very challenging.The 40LaFeO_(3)-CuFe_(2)O_(4)(40LFO-CFO)nanocomposite was constructed and its catalytic performance was studied using Rhodamine B(RhB)as the target pollutant.40LFO-CFO exhibited excellent RhB degradation by the persulfate(PS)-assisted photocatalytic process compared to the pristine LFO and CFO.The degradation rate constant for RhB by 40LFO-CFO in the Vis/PS system was 2.22h^(-1)which is 3.04 times and 5.05 times higher than the pristine LFO(0.73 h^(-1))and CFO(0.44h^(-1)),respectively.Furthermore,the trapping experiments and EPR spectra proved that h^(+) plays a leading role in the bleaching of RhB for the 40LFO-CFO/PS/Vis system.The enhanced photocatalytic oxidation activity of 40LFO-CFO could be attributed to the unique charge carriers flow in 40LFO-CFO due to the Z-scheme and the cooperation effect between photocatalysis and PS activation.The recycle tests confessed the stability of 40LFO-CFO.Additionally,the intermediates and products of RhB are detected by liquid chromatographymass spectrometry(LC-MS),and the photocatalytic degradation routes of RhB for the 40LFO-CFO/Vis/PS system were proposed.Moreover,the 40LFO-CFO nanocomposite has a superior catalytic performance for other organics,suggesting that it is a promising heterocatalyst because of its high catalytic activity and stability for the PS-assisted photocatalytic process.展开更多
The coronavirus disease 2019 was first reported in Wuhan in December 2019 and then spread rapidly throughout the world.On March 11,2020,the World Health Organization declared coronavirus disease 2019 a pandemic.In res...The coronavirus disease 2019 was first reported in Wuhan in December 2019 and then spread rapidly throughout the world.On March 11,2020,the World Health Organization declared coronavirus disease 2019 a pandemic.In response to the pandemic,the management division of West China Hospital oversaw the implementation of hospital-wide emergency measures.In accordance with these measures,the hospital's thoracic surgery ward implemented a new management system by reformulating staff training plans,patient admission procedures,and other systems for managing the ward and protecting perioperative patients.Overall,the ward was successful in restoring normal working order,protecting all staff from occupational exposures,and ensuring the safety of inpatients and their families.展开更多
基金funded by the National Natural Science Foundation of China(52062047)the Innovation Capacity Support Plan of Shaanxi Province(2020TD-032)+2 种基金Yulin Science and Technology Plan(2019-81-1,CXY-2021-101-02 and 2023-CXY-154)Joint Fund of Clean Energy Innovation Institute of Chinese Academy of Sciences and Yulin University(YLUDNL202202)Yulin University Science and Technology Plan(2020TZRC01).
文摘The sulfate radical-based photocatalytic process is supposed to be the most promising way to degrade organic pollutants.However,the development of a suitable and efficient photocatalyst is very challenging.The 40LaFeO_(3)-CuFe_(2)O_(4)(40LFO-CFO)nanocomposite was constructed and its catalytic performance was studied using Rhodamine B(RhB)as the target pollutant.40LFO-CFO exhibited excellent RhB degradation by the persulfate(PS)-assisted photocatalytic process compared to the pristine LFO and CFO.The degradation rate constant for RhB by 40LFO-CFO in the Vis/PS system was 2.22h^(-1)which is 3.04 times and 5.05 times higher than the pristine LFO(0.73 h^(-1))and CFO(0.44h^(-1)),respectively.Furthermore,the trapping experiments and EPR spectra proved that h^(+) plays a leading role in the bleaching of RhB for the 40LFO-CFO/PS/Vis system.The enhanced photocatalytic oxidation activity of 40LFO-CFO could be attributed to the unique charge carriers flow in 40LFO-CFO due to the Z-scheme and the cooperation effect between photocatalysis and PS activation.The recycle tests confessed the stability of 40LFO-CFO.Additionally,the intermediates and products of RhB are detected by liquid chromatographymass spectrometry(LC-MS),and the photocatalytic degradation routes of RhB for the 40LFO-CFO/Vis/PS system were proposed.Moreover,the 40LFO-CFO nanocomposite has a superior catalytic performance for other organics,suggesting that it is a promising heterocatalyst because of its high catalytic activity and stability for the PS-assisted photocatalytic process.
文摘The coronavirus disease 2019 was first reported in Wuhan in December 2019 and then spread rapidly throughout the world.On March 11,2020,the World Health Organization declared coronavirus disease 2019 a pandemic.In response to the pandemic,the management division of West China Hospital oversaw the implementation of hospital-wide emergency measures.In accordance with these measures,the hospital's thoracic surgery ward implemented a new management system by reformulating staff training plans,patient admission procedures,and other systems for managing the ward and protecting perioperative patients.Overall,the ward was successful in restoring normal working order,protecting all staff from occupational exposures,and ensuring the safety of inpatients and their families.
