查看更多>>摘要：Porous carbon materials(PCMs)play a pivotal role in diverse applications,such as energy storage,adsorption,catalysis,environmental remediation,and microwave adsorption.The selection of carbon precursors,in particular,is crucial for tailoring porous structures with specific functionalities.Biomass,with its rich carbon feedstock,abundant availability,renewability,and versatile structures,has emerged as a promising precursor for porous carbon material synthesis.This review comprehensively summarizes the recent advances in biomass-derived porous carbon materials(BPCMs)encompassing synthetic strategy,morphology,structural composition,and multiple applications.We first review synthetic approaches aiming at regulating porosity,followed by morphological and composition features of BPCMs,with a special emphasis on elucidating the dimensional clarification and heteroatom doping effects.The discussion then extends to the wide-ranging applications of BPCMs,covering energy-related applications and CO2 adsorption to environmental remediation.Finally,the review outlines the existing challenges and prospects in the field.In summary,this review systematically describes BPCMs and provides valuable guidance for researchers to select and synthesize BPCMs that meet specific functional requirements.
查看更多>>摘要：Terpenoids are a diverse class of natural products widely used as pharmaceuticals,perfumes,flavors,and biofuels.Traditionally,terpenoids are obtained from natural sources,such as plants,but their production is limited by the insufficiency of resources and low yields of extraction.Microbial production of terpenoids has emerged as a promising alternative due to that it is sustainable and easy to scale up.This review aims to summarize recent advances in microbial production of terpenoids from inexpensive biomass-derived feedstocks.Metabolic pathways and key enzymes involved in terpenoid biosynthesis are introduced.Microorganisms that can utilize low-cost lignocellulosic feedstocks for terpenoid production are highlighted.The challenges and prospects faced by microbial terpenoid production are proposed.We believe that continuous progress in the fields of biomass transformation and synthetic biology will ultimately achieve industrial production of microbial terpenoids.
查看更多>>摘要：The challenge of breaking 5-5'bonds in lignin,attributed to their high bonding energy,has prompted the development of a new transformation pathway.Biphenyl,an important model compound for lignin,contains these 5-5'bonds,making it crucial to devise a strategy for their cleavage in lignin transformation.This study introduces a novel method for transforming biphenyl,involving selective hydrogenation to cyclohexylbenzene by Ni/SiO2 catalyst,followed by its oxidation to phenol and cyclohexanone through a radical mechanism.Results demonstrate that the catalysts with small particles have strong catalytic activity,while there is little difference in selectivity.The reason for the high selectivity of cyclohexylbenzene is due to the limited adsorption of cyclohexylbenzene on Ni/SiO2.This work presents a fresh approach to breaking resilient C-C bonds in lignin.
查看更多>>摘要：The reductive amination of furfural to furfurylamine is an important and still challenging topic in the field of biomass conversion.In this work,we prepared a series of Ni/Al2O3-LaOx catalysts by co-precipitation method,the role of La played in promoting the catalytic performances of reductive amination furfural was discussed based on the changes in the electronic state of Ni species,acidity,and Ni particle size.The catalytic activity and the selectivity of furfurylamine are highly dependent on the surface properties and the structure of the catalyst.The addition of La promoted the amount of strong acidic sites and the H2 dissociation and spillover on the surface,thus inducing the improvement of the catalytic activity and furfurylamine selectivity.The Ni/Al2O3-0.5LaOx catalyst with suitable acid sites gave a high yield of furfurylamine(94.9％)under mild reaction conditions.Moreover,the catalyst could be recycled five times without significant loss in activity.The Ni/Al2O3-LaOx catalyst is of great promise in the production of amines via reductive amination reaction.
查看更多>>摘要：The interface between Au and support has attracted extensive interest because of its unique catalytic ability for hydrogen activation in catalytic hydrogenation/hydrogenolysis reactions.Herein,we create the Au-CoO-Ov interface in the 1.0％Au/Co3O4-Rod-250 catalyst,which could dissociate H2 via the heterolytic way to yield rich hydride species and achieve excellent catalytic performance in the hydrogenolysis of biomass-derived 5-hydroxymethylfurfural(HMF)to 2,5-dimethylfuran(DMF).The XRD and HRTEM analyses show that Au nanoparticles are uniformly dispersed on CoO-Ov surface and in situ DRIFTS spectra show the enhancement of heterolytic dissociation of hydrogen(signals of Au-D and O-D vibration)compared with bare CoO(Co3O4-Rod-250).This work provides insights for fabricating highly active Au-support catalysts for catalytic hydrogenation/hydrogenolysis reactions.
查看更多>>摘要：Selective activation of C-O bond is of fundamental importance in the precise conversion of oxygenates into value-added compounds in an atom-economic and sustainable manner,and meanwhile,the structurally well-defined dual-atoms catalysts(DACs)have been scarcely investigated in this field.In this study,a series of transition metal DACs anchored on nitrogen-doped graphene(TM2/NC,TM=Pt,Ir,Rh,Pd,Ru,Co,Ni and Cu)was constructed to make a comprehensive investigation of their selectivity in the hydrogenative transformation of furfuryl alcohol(FAL),an important biomass platform molecule,to 1,2-pentanediol(1,2-PeD)via selective cleavage of furanic C5-O bond,by density functional theory(DFT)calculations and microkinetic modeling.We found that lr2/NC demonstrated a high selectivity for the cleavage of furanic C5-O bond to produce 1,2-PeD,while the production of THFAL or 1,5-pentanediol(1,5-PeD)on other TM2/NC catalysts are more favorable.Furthermore,we found that the selective C-O bond cleavage of FAL furan ring is affected by the orbital overlap between the d-orbitals of the anchored metal atoms and the p-orbitals of the adsorbed C atom in FAL,suggesting that the selectivity of the C-O bond cleavage is inextricably related with the electronic property of the anchored metals.
查看更多>>摘要：Hydrogels have been extensively studied for applications in various fields,such as tissue engineering and soft robotics,as determined by their mechanical properties.The mechanical design of hydrogels typically focuses on the modulus,toughness,and deformability.These characteristics play important roles and make great achievements for hydrogel use.In recent years,a growing body of research has concentrated on the fatigue property of hydrogels,which determines their resistance to crack propagation in the networks during cyclic mechanical loads for applications.However,knowledge of hydrogel fatigue behavior remains notably deficient.Here,we present a brief overview of the fatigue behavior of hydrogels,encompassing the general experimental methods to measure the fatigue property and fundamental theoretical calculation models.Then,we highlight multiple strategies to enhance the fatigue resistance of hydrogels.Finally,we present our perspectives on fatigue-resistant hydrogels,outstanding challenges and potential directions for future research.
查看更多>>摘要：Zeolite-confined Fe-site catalysts(ZFCs)have emerged as superior materials for sustainably producing high-value chemicals through CO2 hydrogenation,owing to their adaptable framework,customizable composition,and thermal robustness.They excel in activating,adsorbing,and converting CO2 with remarkable efficiency and consistency in performance.This has sparked a surge in research interest in recent years.The review delves into the latest advancements in CO2 catalytic hydrogenation to olefins,alcohols,aromatics,and other liquid hydrocarbons,examining the synthesis,modification tactics,and the correlation between structure and performance across various ZFCs.Additionally,it underscores the pivotal factors affecting performance and sheds light on the mechanisms behind selectivity control in the CO2 hydrogenation process facilitated by ZFCs.To conclude,it presents pressing challenges and strategic recommendations to inspire the development of high-performance,durable ZFCs for CO2 hydrogenation applications.
查看更多>>摘要：The fall armyworm,Spodoptera frugiperda(S.frugiperda),represents the most resistant insect species and poses serious threat to grain yield.Chlorantraniliprole(CHL),which targets the ryanodine receptors(RyRs)in insects,has demonstrated the efficacy in controlling S.frugiperda.Nevertheless,this has led to emerging resistance in several countries.To counter this resistance,a viable approach involves the development of novel compounds that bind against RyRs via distinct binding sites or modes.In this study,a series of 22 novel anthranilic diamide derivatives was designed and synthesized,and their insecticidal activities were evaluated.Most of these derivatives showed moderate to good insecticidal activity against S.frugiperda and Mythimna separata.Time-lapse fluorescence measurements of endoplasmic reticulum luminal calcium revealed that most derivatives elicited cellular responses similar as CHL when assessed on HEK293 cells expressing S.frugiperda ryanodine receptors(SfRyRs).The mode of action of compound 13a was studied and verified on the isolated neurons by calcium imaging technique.Finally,molecular docking analysis was employed to predict the binding mechanism of compound 13a against SfRyRs.Overall,these novel diamide derivatives hold promise as a valuable resource for guiding the future design of insecticidal compounds targeting RyRs.
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