With increasing concerns on the environment and human health,the degradation of glyphosate through the formation of less toxic intermediates is of great importance.Among the developed methods for the degradation of gl...With increasing concerns on the environment and human health,the degradation of glyphosate through the formation of less toxic intermediates is of great importance.Among the developed methods for the degradation of glyphosate,photodegradation is a clean and efficient strategy.In this work,we report a new photocatalyst by doping F ion on BiVO_(4) that can efficiently degrade glyphosate and reduce the toxic emissions of aminomethylphosphonic acid(AMPA)through the selective(P)−C−Ncleavage in comparison of BiVO_(4) catalyst.The results demonstrate that the best suppression of AMPA formation was achieved by the catalyst of 0.3F@BiVO_(4) at pH=9(AMPA formation below10%).In situ attenuated total reflectance Fourier transforms infrared(ATR-FTIR)spectroscopy indicates that the adsorption sites of glyphosate on BiVO_(4) and 0.3F@BiVO_(4) are altered due to the difference in electrostatic interactions.Such an absorption alteration leads to the preferential cleavage of the C−Nbond on the N−C−P skeleton,thereby inhibiting the formation of toxic AMPA.These results improve our understanding of the photodegradation process of glyphosate catalyzed by BiVO_(4)-based catalysts and pave a safe way for abiotic degradation of glyphosate.展开更多
The conversion of biomass into lactic acid is essential for meeting industrial demand sustainably,alleviating resource shortages and environmental issues with benefits such as controllable conditions,lower costs,and r...The conversion of biomass into lactic acid is essential for meeting industrial demand sustainably,alleviating resource shortages and environmental issues with benefits such as controllable conditions,lower costs,and recyclable catalysts over traditional methods.The one-pot conversion of biomass(e.g.,microalgae,lignocellulose)and platform compounds(e.g.,glucose,fructose,erythritol,glycerol)to lactic acid involves multiple reaction steps to generate precursors such as dihydroxyacetone and pyruvaldehyde.Mismatched reaction rates often cause significant side reactions,resulting in low lactic acid selectivity and massive byproducts such as formic acid,acetic acid,and acetolactate.Achieving high selectivity to lactic acid requires precise catalytic control to synchronize reaction rates,promoting the targeted formation of lactic acid.In this review,we describe the reaction pathways for lactic acid production from biomass and its platform compounds,summarizing the advancements in the selective synthesis of lactic acid using alkali/alkaline earth catalysts and Lewis acid catalysts which involve post-transition metal(Al,Ga,Sn,Pb,etc.),transition metal(Zr,Nb,Mo,etc.)and lanthanide catalysts,as well as redox catalysts(such as perovskite-type and photocatalytic catalysts).The methods for regulating the selectivity to biomass-derived lactic acid are also summarized.By reviewing the progress and challenges in catalyst development for biomass-based lactic acid,we provide an outlook on catalyst design and characterization,reaction mechanism studies,and practical applications.展开更多
基金supported by the National Natural Science Foundation of China(Nos.21972073,22136003,22176110)the Hubei Province Support Project of Introducing Intelligence(No.2019BJH004)the 111 Project of China(No.D20015).
文摘With increasing concerns on the environment and human health,the degradation of glyphosate through the formation of less toxic intermediates is of great importance.Among the developed methods for the degradation of glyphosate,photodegradation is a clean and efficient strategy.In this work,we report a new photocatalyst by doping F ion on BiVO_(4) that can efficiently degrade glyphosate and reduce the toxic emissions of aminomethylphosphonic acid(AMPA)through the selective(P)−C−Ncleavage in comparison of BiVO_(4) catalyst.The results demonstrate that the best suppression of AMPA formation was achieved by the catalyst of 0.3F@BiVO_(4) at pH=9(AMPA formation below10%).In situ attenuated total reflectance Fourier transforms infrared(ATR-FTIR)spectroscopy indicates that the adsorption sites of glyphosate on BiVO_(4) and 0.3F@BiVO_(4) are altered due to the difference in electrostatic interactions.Such an absorption alteration leads to the preferential cleavage of the C−Nbond on the N−C−P skeleton,thereby inhibiting the formation of toxic AMPA.These results improve our understanding of the photodegradation process of glyphosate catalyzed by BiVO_(4)-based catalysts and pave a safe way for abiotic degradation of glyphosate.
基金supported by the National Key Research and Development Program of China(2022YFB1105100)the National Natural Science Foundation of China(U2330105)the funding from Science Foundation of China University of Petroleum,Beijing(24620188JC005).
文摘The conversion of biomass into lactic acid is essential for meeting industrial demand sustainably,alleviating resource shortages and environmental issues with benefits such as controllable conditions,lower costs,and recyclable catalysts over traditional methods.The one-pot conversion of biomass(e.g.,microalgae,lignocellulose)and platform compounds(e.g.,glucose,fructose,erythritol,glycerol)to lactic acid involves multiple reaction steps to generate precursors such as dihydroxyacetone and pyruvaldehyde.Mismatched reaction rates often cause significant side reactions,resulting in low lactic acid selectivity and massive byproducts such as formic acid,acetic acid,and acetolactate.Achieving high selectivity to lactic acid requires precise catalytic control to synchronize reaction rates,promoting the targeted formation of lactic acid.In this review,we describe the reaction pathways for lactic acid production from biomass and its platform compounds,summarizing the advancements in the selective synthesis of lactic acid using alkali/alkaline earth catalysts and Lewis acid catalysts which involve post-transition metal(Al,Ga,Sn,Pb,etc.),transition metal(Zr,Nb,Mo,etc.)and lanthanide catalysts,as well as redox catalysts(such as perovskite-type and photocatalytic catalysts).The methods for regulating the selectivity to biomass-derived lactic acid are also summarized.By reviewing the progress and challenges in catalyst development for biomass-based lactic acid,we provide an outlook on catalyst design and characterization,reaction mechanism studies,and practical applications.
