Artificial photocatalytic energy conversion is considered as the most potential strategy for solving the increasingly serious energy crisis and environmental pollution problems by directly capturing solar energy.There...Artificial photocatalytic energy conversion is considered as the most potential strategy for solving the increasingly serious energy crisis and environmental pollution problems by directly capturing solar energy.Therefore,high efficiency photocatalyst has drawn significant research attention in recent years.Due to the excellent electronic,optical,structural,and physicochemical performances,silver-based g-C_(3)N_(4)have become promising photocatalysts.This review emphasizes the recent progresses and challenges on g-C_(3)N_(4)decorated with silver for photocatalytic energy conversion.The extensive use of g-C_(3)N_(4)decorated with silver in diverse photocatalytic reactions,including hydrogen evolution,pollutant degradation and carbon dioxide reduction,is also fully introduced.In addition,we propose the perspectives of g-C_(3)N_(4)decorated with silver on photocatalytic applications.We hope that this review will shed some light on the photocatalytic energy conversion of g-C_(3)N_(4)decorated with silver.展开更多
The prevalence of quinolone antibiotics as emerging contaminants in wastewater necessitates urgent remediation strategies due to their recalcitrant nature and ecological risks.This study demonstrates an innovative Ag-...The prevalence of quinolone antibiotics as emerging contaminants in wastewater necessitates urgent remediation strategies due to their recalcitrant nature and ecological risks.This study demonstrates an innovative Ag-nZVI/BC composite synthesized through silver-modified nZVI immobilized on coconut shell biochar,which effectively activates H_(2)O_(2)for levofloxacin(LVF)degradation.The composite’s exceptional performance(91.2%LVF removal at 0.3 g/L dosage)stems from its 238 m^(2)/g specific surface area and abundant oxygen-containing functionalities that facilitate electron transfer.Systematic parameter optimization revealed pH 3.0,10 mmol/L H_(2)O_(2),and 0.3 g/L catalyst as optimal conditions,while coexisting anions showed differential inhibition effects.Radical quenching experiments coupled with EPR spectroscopy confirmed·OH and·O_(2)^(−)as dominant reactive species.Through LC-MS analysis,we identified three primary degradation pathways involving piperazine ring cleavage and defluorination.Notably,eco-toxicity assessment using ECOSAR indicated 62.7%reduction in acute aquatic toxicity after treatment.The regenerable catalyst maintained 83.4%efficiency after five cycles,demonstrating a sustainable approach for antibiotic-contaminated wastewater remediation.展开更多
基金financially supported by the Shenzhen Science and Technology Program(No.JCYJ20220531093205013)the National Natural Science Foundation of China(No.52100069).
文摘Artificial photocatalytic energy conversion is considered as the most potential strategy for solving the increasingly serious energy crisis and environmental pollution problems by directly capturing solar energy.Therefore,high efficiency photocatalyst has drawn significant research attention in recent years.Due to the excellent electronic,optical,structural,and physicochemical performances,silver-based g-C_(3)N_(4)have become promising photocatalysts.This review emphasizes the recent progresses and challenges on g-C_(3)N_(4)decorated with silver for photocatalytic energy conversion.The extensive use of g-C_(3)N_(4)decorated with silver in diverse photocatalytic reactions,including hydrogen evolution,pollutant degradation and carbon dioxide reduction,is also fully introduced.In addition,we propose the perspectives of g-C_(3)N_(4)decorated with silver on photocatalytic applications.We hope that this review will shed some light on the photocatalytic energy conversion of g-C_(3)N_(4)decorated with silver.
基金funding sources by the National Natural Science Foundation of China(No.52100071).
文摘The prevalence of quinolone antibiotics as emerging contaminants in wastewater necessitates urgent remediation strategies due to their recalcitrant nature and ecological risks.This study demonstrates an innovative Ag-nZVI/BC composite synthesized through silver-modified nZVI immobilized on coconut shell biochar,which effectively activates H_(2)O_(2)for levofloxacin(LVF)degradation.The composite’s exceptional performance(91.2%LVF removal at 0.3 g/L dosage)stems from its 238 m^(2)/g specific surface area and abundant oxygen-containing functionalities that facilitate electron transfer.Systematic parameter optimization revealed pH 3.0,10 mmol/L H_(2)O_(2),and 0.3 g/L catalyst as optimal conditions,while coexisting anions showed differential inhibition effects.Radical quenching experiments coupled with EPR spectroscopy confirmed·OH and·O_(2)^(−)as dominant reactive species.Through LC-MS analysis,we identified three primary degradation pathways involving piperazine ring cleavage and defluorination.Notably,eco-toxicity assessment using ECOSAR indicated 62.7%reduction in acute aquatic toxicity after treatment.The regenerable catalyst maintained 83.4%efficiency after five cycles,demonstrating a sustainable approach for antibiotic-contaminated wastewater remediation.
