Developing high-efficiency photothermal seawater desalination devices is of significant importance in addressing the shortage of freshwater.Despite much effort made into photothermal materials,there is an urgent need ...Developing high-efficiency photothermal seawater desalination devices is of significant importance in addressing the shortage of freshwater.Despite much effort made into photothermal materials,there is an urgent need to design a rapidly synthesized photothermal evaporator for the comprehensive purification of complex seawater.Therefore,we report on all-in-one FeOx-rGO photothermal sponges synthesized via solid-phase microwave thermal shock.The narrow band gap of the semiconductor material Fe_(3)O_(4) greatly reduces the recombination of electron-hole pairs,enhancing non-radiative relaxation light absorption.The abundantπorbitals in rGO promote electron excitation and thermal vibration between the lattices.Control of the surface hydrophilicity and hydrophobicity promotes salt resistance while simultaneously achieving the purification of various complex polluted waters.The optimized GFM-3 sponge exhibitedan enhanced photothermal conversion rate of 97.3% and a water evaporation rate of 2.04 kg/(m^(2)·hr),showing promising synergistic water purification properties.These findings provide a highly efficient photothermal sponge for practical applicationsof seawater desalination and purification,as well as develop a super-rapid processing methodology for evaporation devices.展开更多
The widespread nitrogen oxides(NOx,mainly in NO)in the atmosphere have threatened human health and ecological environment.The dilute NO(ppb)is difficult to efficiently remove via the traditional process due to its cha...The widespread nitrogen oxides(NOx,mainly in NO)in the atmosphere have threatened human health and ecological environment.The dilute NO(ppb)is difficult to efficiently remove via the traditional process due to its characteristics of low concentration,wide range,large total amount,etc.Photocatalysis can utilize solar energy to purify NO pollutants under mild conditions,but its application is limited due to the low selectivity of nitrate and poor activity of NO removal.The underlying reason is that the interface mechanism of NO oxidation is not clearly understood,which leads to the inability to accurately regulate the NO oxidation process.Herein,the recent advances in the photocatalytic oxidation of NO are summarized.Firstly,the common strategies to effectively regulate carrier dynamics such as morphology control,facet engineering,defect engineering,plasma coupling,heterojunction and single-atom catalysts are discussed.Secondly,the progress of enhancing the adsorption and activation of reactants such as NO and O_(2) during NO oxidation is described in detail,and the corresponding NO oxidation mechanisms are enumerated.Finally,the challenges and prospects of photocatalytic NO oxidation are presented in term of nanotechnology for air pollution control.This review can shed light on the interface mechanism of NO oxidation and provide illuminating information on designing novel catalysts for efficient NOx control.展开更多
The contamination of nitric oxide presents a significant environmental challenge,necessitating the development of efficient photocatalysts for remediation.Conventional heterojunctions encounter obstacles such as large...The contamination of nitric oxide presents a significant environmental challenge,necessitating the development of efficient photocatalysts for remediation.Conventional heterojunctions encounter obstacles such as large contact barriers,sluggish charge transport,and compromised redox capacity.Here,we introduce an innovative S-type heterostructure photocatalyst,UiO-66-NH_(2)/ZnS(en)_(0.5),designed specifically to overcome these challenges.The synthesis,employing a unique microwave solvothermal method,strategically aligns the lowest unoccupied molecular orbital of UiO-66-NH_(2)with the highest occupied molecular orbital of ZnS(en)_(0.5),fostering the formation of a stepped heterojunction.The resulting intimate interface contact generates a built-in electric field,facilitating charge separation and migration,as evidenced by time-resolved photoluminescence spectroscopy and photoelectrochemical tests.The abundant active sites in the porous UiO-66-NH_(2)counterpart provide adsorption and activation sites for nitrogen monoxide(NO)oxidation.Performance evaluation reveals exceptional photocatalytic NO removal,achieving 70%efficiency and 99%selectivity toward nitrates under simulated solar illumination.Evidence from X-ray photoelectron spectroscopy and trapping experiments supports the effectiveness of the S-type heterostructure,showcasing refined reactive oxygen species,particularly superoxide.Thus,this study introduces a new perspective on advanced NO oxidation and unlocks the potential of S-scheme heterojunctions to refine reactive oxygen species for NO remediation.展开更多
基金supported by the National Natural Science Foundation of China(No.22106105)the Innovation Program of Shanghai Municipal Education Commission(No.2019–01–07–00-E00015)+4 种基金the Shanghai Scientific and Technological Innovation Project(Nos.21DZ1206300 and 19JC1410402)the Scientific and Technological Innovation Team for Green Catalysis and Energy Material in Yunnan Institutions of Higher Learning,General Project of Yunnan Province Science and Technology Department(No.202101BA070001–050)the Central Guidance on Local Science and Technology Development Fund of Shanghai(No.YDZX20213100003002)the Science and Technology Commission of Shanghai Municipality(No.20060502200)the Program for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning,and Shanghai Sailing Program(No.20YF1432200)。
文摘Developing high-efficiency photothermal seawater desalination devices is of significant importance in addressing the shortage of freshwater.Despite much effort made into photothermal materials,there is an urgent need to design a rapidly synthesized photothermal evaporator for the comprehensive purification of complex seawater.Therefore,we report on all-in-one FeOx-rGO photothermal sponges synthesized via solid-phase microwave thermal shock.The narrow band gap of the semiconductor material Fe_(3)O_(4) greatly reduces the recombination of electron-hole pairs,enhancing non-radiative relaxation light absorption.The abundantπorbitals in rGO promote electron excitation and thermal vibration between the lattices.Control of the surface hydrophilicity and hydrophobicity promotes salt resistance while simultaneously achieving the purification of various complex polluted waters.The optimized GFM-3 sponge exhibitedan enhanced photothermal conversion rate of 97.3% and a water evaporation rate of 2.04 kg/(m^(2)·hr),showing promising synergistic water purification properties.These findings provide a highly efficient photothermal sponge for practical applicationsof seawater desalination and purification,as well as develop a super-rapid processing methodology for evaporation devices.
基金supported by the National Natural Science Foundation of China(Nos.22022608,21876113,22176127,21261140333,22106105 and 62071300)the Shanghai Engineering Research Center of Green Energy Chemical Engineering(No.18DZ2254200)+3 种基金“111”Innovation and Talent Recruitment Base on Photochemical and Energy Materials(No.D18020)Shanghai Government(Nos.22010503400,18SG41 and YDZX20213100003002)Shanghai Scientific and Technological Innovation Project(No.21DZ1206300)Shanghai Sailing Program(No.22YF1430400)。
文摘The widespread nitrogen oxides(NOx,mainly in NO)in the atmosphere have threatened human health and ecological environment.The dilute NO(ppb)is difficult to efficiently remove via the traditional process due to its characteristics of low concentration,wide range,large total amount,etc.Photocatalysis can utilize solar energy to purify NO pollutants under mild conditions,but its application is limited due to the low selectivity of nitrate and poor activity of NO removal.The underlying reason is that the interface mechanism of NO oxidation is not clearly understood,which leads to the inability to accurately regulate the NO oxidation process.Herein,the recent advances in the photocatalytic oxidation of NO are summarized.Firstly,the common strategies to effectively regulate carrier dynamics such as morphology control,facet engineering,defect engineering,plasma coupling,heterojunction and single-atom catalysts are discussed.Secondly,the progress of enhancing the adsorption and activation of reactants such as NO and O_(2) during NO oxidation is described in detail,and the corresponding NO oxidation mechanisms are enumerated.Finally,the challenges and prospects of photocatalytic NO oxidation are presented in term of nanotechnology for air pollution control.This review can shed light on the interface mechanism of NO oxidation and provide illuminating information on designing novel catalysts for efficient NOx control.
基金National Natural Science Foundation of China,Grant/Award Numbers:22106105,22201180Innovation Program of Shanghai Municipal Education Commission,Grant/Award Number:2019‐01‐07‐00‐E00015+3 种基金Shanghai Scientific and Technological Innovation Project,Grant/Award Number:21DZ1206300Central Guidance on Local Science and Technology Development Fund of Shanghai,Grant/Award Number:YDZX20213100003002Science and Technology Commission of Shanghai Municipality,Grant/Award Number:20060502200Program for Professor of Special Appointment,Shanghai Sailing Program,Grant/Award Number:20YF1432200。
文摘The contamination of nitric oxide presents a significant environmental challenge,necessitating the development of efficient photocatalysts for remediation.Conventional heterojunctions encounter obstacles such as large contact barriers,sluggish charge transport,and compromised redox capacity.Here,we introduce an innovative S-type heterostructure photocatalyst,UiO-66-NH_(2)/ZnS(en)_(0.5),designed specifically to overcome these challenges.The synthesis,employing a unique microwave solvothermal method,strategically aligns the lowest unoccupied molecular orbital of UiO-66-NH_(2)with the highest occupied molecular orbital of ZnS(en)_(0.5),fostering the formation of a stepped heterojunction.The resulting intimate interface contact generates a built-in electric field,facilitating charge separation and migration,as evidenced by time-resolved photoluminescence spectroscopy and photoelectrochemical tests.The abundant active sites in the porous UiO-66-NH_(2)counterpart provide adsorption and activation sites for nitrogen monoxide(NO)oxidation.Performance evaluation reveals exceptional photocatalytic NO removal,achieving 70%efficiency and 99%selectivity toward nitrates under simulated solar illumination.Evidence from X-ray photoelectron spectroscopy and trapping experiments supports the effectiveness of the S-type heterostructure,showcasing refined reactive oxygen species,particularly superoxide.Thus,this study introduces a new perspective on advanced NO oxidation and unlocks the potential of S-scheme heterojunctions to refine reactive oxygen species for NO remediation.
