The transport and thermoelectric properties together with annealing of the new layered Bi-chalcogenide LaOBiHgS_3 are studied. On the transport part, the insulating behavior of the as-grown sample is evidently depress...The transport and thermoelectric properties together with annealing of the new layered Bi-chalcogenide LaOBiHgS_3 are studied. On the transport part, the insulating behavior of the as-grown sample is evidently depressed by post annealing.A hump-like abnormality appears around 170 K. The thermoelectric performance of the sample is observably improved by the annealing, mainly because of the enhanced electrical conductance. The present results suggest that the physical properties of LaOBiHgS_3 are sensitive to post annealing and the possible micro adjustments that follow, indicating the layered Bi-chalcogenide family to be an ideal platform for designing novel functional materials.展开更多
Heterogeneous catalysis is a vivid branch of traditional catalysis field,with the advantage of high efficiency and being easily separated from reactants and products after reaction,and have received widespread attenti...Heterogeneous catalysis is a vivid branch of traditional catalysis field,with the advantage of high efficiency and being easily separated from reactants and products after reaction,and have received widespread attentions in large-scale industrial production,especially in the field of energy utilization.Boron has been found to be a key functional component for designing high-performance heterogeneous catalysts.In this review,we cover and categorize the past and recent progress in boron-containing materials and their applications in heterogeneous catalysis particularly in energy-related fields.The fundamental roles of boron components in the emerging heterogeneous catalysis of construction,regulation and stabilization of active phases/sites are highlighted,with the emphasis on how they regulating structural and electronic properties of host materials.We then categorize boron-containing catalysts into six kinds mainly including intermetallic boride catalysts,metal boride-derived catalysts,boron-doped catalysts,metal boride-decorated catalysts,boron-containing compounds as catalyst supports,and singleboron-site catalysts,as well as try to establish structure-catalytic activity relationship.The catalytic applications of these six boron-containing catalysts are discussed separately,focusing on the energy-related reactions such as hydrogen evolution reaction(HER),oxygen evolution reaction(OER),oxygen reduction reaction(ORR),carbon dioxide reduction reaction(CO_(2)RR)and nitrogen reduction reaction(NRR).Finally,the opportunities and challenges related to boron-containing compounds in the field of catalysis are prospected.展开更多
Antibiotics,as widely used antibacterial drug,exist in various environmental media.Antibiotic residues can affect biological metabolism and lead to bacterial resistance and the formation of antibiotic-resistance genes...Antibiotics,as widely used antibacterial drug,exist in various environmental media.Antibiotic residues can affect biological metabolism and lead to bacterial resistance and the formation of antibiotic-resistance genes,posing a threat to human health and ecological safety.Establishing efficient detection methods for antibiotics and antibiotic-resistance genes has great environmental significance.Fluorescence detection methods,due to their fast response,high sensitivity and specificity,and low-cost,are widely used in chemical and biological sensing.This review first summarizes the pre-treatment methods for different types of environmental samples,and then focuses on the recent advances of fluorescence methods for the detection of antibiotics and antibiotic-resistance genes.Finally,main challenges and future research directions of fluorescence methods for antibiotic and antibiotic-resistance genes detection are discussed.This review highlights the promising prospect of fluorescence methods in-situ detection and monitoring of antibiotics and antibiotic-resistance genes,and provides guidance for the construction of overall risk assessment system of environmental media.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.51572001,11404002,and 11404003)the ‘211 Project’ of Anhui University,China(Grant No.J01001319J10113190007)
文摘The transport and thermoelectric properties together with annealing of the new layered Bi-chalcogenide LaOBiHgS_3 are studied. On the transport part, the insulating behavior of the as-grown sample is evidently depressed by post annealing.A hump-like abnormality appears around 170 K. The thermoelectric performance of the sample is observably improved by the annealing, mainly because of the enhanced electrical conductance. The present results suggest that the physical properties of LaOBiHgS_3 are sensitive to post annealing and the possible micro adjustments that follow, indicating the layered Bi-chalcogenide family to be an ideal platform for designing novel functional materials.
基金the financial support from the National Natural Science Foundation of China(NSFC Nos.21922507 and 21771079)the Jilin Province Science and Technology Development Plan(No.YDZJ202101ZYTS126)+1 种基金the Fundamental Research Funds for the Central Universitiesthe financial support from Natural Science Foundation of Jilin Province,China(No.20210101120JC)。
文摘Heterogeneous catalysis is a vivid branch of traditional catalysis field,with the advantage of high efficiency and being easily separated from reactants and products after reaction,and have received widespread attentions in large-scale industrial production,especially in the field of energy utilization.Boron has been found to be a key functional component for designing high-performance heterogeneous catalysts.In this review,we cover and categorize the past and recent progress in boron-containing materials and their applications in heterogeneous catalysis particularly in energy-related fields.The fundamental roles of boron components in the emerging heterogeneous catalysis of construction,regulation and stabilization of active phases/sites are highlighted,with the emphasis on how they regulating structural and electronic properties of host materials.We then categorize boron-containing catalysts into six kinds mainly including intermetallic boride catalysts,metal boride-derived catalysts,boron-doped catalysts,metal boride-decorated catalysts,boron-containing compounds as catalyst supports,and singleboron-site catalysts,as well as try to establish structure-catalytic activity relationship.The catalytic applications of these six boron-containing catalysts are discussed separately,focusing on the energy-related reactions such as hydrogen evolution reaction(HER),oxygen evolution reaction(OER),oxygen reduction reaction(ORR),carbon dioxide reduction reaction(CO_(2)RR)and nitrogen reduction reaction(NRR).Finally,the opportunities and challenges related to boron-containing compounds in the field of catalysis are prospected.
基金supported by the National Key R&D Program of China(No.2019YFC1905400)the National Natural Science Foundation of China(No.22006113)。
文摘Antibiotics,as widely used antibacterial drug,exist in various environmental media.Antibiotic residues can affect biological metabolism and lead to bacterial resistance and the formation of antibiotic-resistance genes,posing a threat to human health and ecological safety.Establishing efficient detection methods for antibiotics and antibiotic-resistance genes has great environmental significance.Fluorescence detection methods,due to their fast response,high sensitivity and specificity,and low-cost,are widely used in chemical and biological sensing.This review first summarizes the pre-treatment methods for different types of environmental samples,and then focuses on the recent advances of fluorescence methods for the detection of antibiotics and antibiotic-resistance genes.Finally,main challenges and future research directions of fluorescence methods for antibiotic and antibiotic-resistance genes detection are discussed.This review highlights the promising prospect of fluorescence methods in-situ detection and monitoring of antibiotics and antibiotic-resistance genes,and provides guidance for the construction of overall risk assessment system of environmental media.
