Nanodiamond(ND)has long been recognized as an effective carbocatalyst for synthesizing styrene via direct dehydrogenation(DDH).However,the induced drastic pressure drop of its powder form limits its industrial applica...Nanodiamond(ND)has long been recognized as an effective carbocatalyst for synthesizing styrene via direct dehydrogenation(DDH).However,the induced drastic pressure drop of its powder form limits its industrial application in heterogeneous catalytic process.In this work,we report a facile hexamethylenetetramine nitrate(HN)-assisted thermal impregnation(HNTI)strategy for fabricating a novel nanodiamondbased monolithic foam(ND/CNT-SiC-ms-HN)catalyst through a two-step approach:One is to soak the carbon nanotube-modified Si C foam(CNT-SiC)with the slurry composed of HN,KCl,Li Cl,and dispersed ND,and the other is to heat the slurry-soaked CNT-SiC(ND-HN-KCl-Li Cl/CNT-SiC)in N_(2) atmosphere at750℃.The as-synthesized ND/CNT-SiC-ms-HN monolithic foam features the enriched surface kenotic C=O by promoted ND dispersion and O-doping,abundant stuctural defects,and improved nucleophilicity by N-doping,originating from the promoted ND dispersion by thermal impregnation(TI)in KCl-LiCl molten salt(MS)and the presence of HN in the annealing process.As a result,the ND/CNT-Si C-ms-HN monolithic foam catalyst by HNTI strategy exhibits 1.5 folds higher steady-state styrene rate(5.49 mmol g^(-1)h^(-1))associated with 98.4%of styrene selectivity compared to the ND-based monolithic foam catalyst(ND/CNT-SiC).Moreover,the ND/CNT-Si C-ms-HN monolithic foam shows excellent long-term stability for the direct dehydrogenation of ethylbenzene to styrene.This work also comes up with a novel way of preparing other highly-dispersed nanocarbons-based monolithic foam catalysts with promising catalytic performance for diverse transformations.展开更多
Digestive system diseases refer to organic and functional disorders of the digestive system,which are prone to recurrence and frequently accompanied by multiple complications.Necroptosis is a regulated mode of cell de...Digestive system diseases refer to organic and functional disorders of the digestive system,which are prone to recurrence and frequently accompanied by multiple complications.Necroptosis is a regulated mode of cell death mediated by death receptors,dependent on receptor protein activation,and could be specifically inhibited by necrostatin-1.Necroptosis is involved in pathological and physiological processes of various diseases,and plays an important role in the growth and development of organisms and the homeostasis of organ tissues.This paper reviewed the research advancement of necroptosis in digestive system disorders,and discussed the relationship between necroptosis and digestive system diseases,aiming to provide theoretical basis for the cure of these diseases.展开更多
A metal-free and environmentally friendly aerobic aromatization photosensitized by organic dye eosin Y bis(tetrabutyl ammonium salt)(TBA-eosinY)has been developed.With the aid of K_(2)CO_(3),the aerobic catalytic syst...A metal-free and environmentally friendly aerobic aromatization photosensitized by organic dye eosin Y bis(tetrabutyl ammonium salt)(TBA-eosinY)has been developed.With the aid of K_(2)CO_(3),the aerobic catalytic system converts 1,4-dihydropyridines to their corresponding pyridine derivatives efficiently under visible light irradiation(λ=450 nm)at room temperature.展开更多
基金financially supported by the National Natural Science Foundation of China(No.21676046)the Chinese Ministry of Education via the Program for New Century Excellent Talents in Universities(No.NCET-12-0079)。
文摘Nanodiamond(ND)has long been recognized as an effective carbocatalyst for synthesizing styrene via direct dehydrogenation(DDH).However,the induced drastic pressure drop of its powder form limits its industrial application in heterogeneous catalytic process.In this work,we report a facile hexamethylenetetramine nitrate(HN)-assisted thermal impregnation(HNTI)strategy for fabricating a novel nanodiamondbased monolithic foam(ND/CNT-SiC-ms-HN)catalyst through a two-step approach:One is to soak the carbon nanotube-modified Si C foam(CNT-SiC)with the slurry composed of HN,KCl,Li Cl,and dispersed ND,and the other is to heat the slurry-soaked CNT-SiC(ND-HN-KCl-Li Cl/CNT-SiC)in N_(2) atmosphere at750℃.The as-synthesized ND/CNT-SiC-ms-HN monolithic foam features the enriched surface kenotic C=O by promoted ND dispersion and O-doping,abundant stuctural defects,and improved nucleophilicity by N-doping,originating from the promoted ND dispersion by thermal impregnation(TI)in KCl-LiCl molten salt(MS)and the presence of HN in the annealing process.As a result,the ND/CNT-Si C-ms-HN monolithic foam catalyst by HNTI strategy exhibits 1.5 folds higher steady-state styrene rate(5.49 mmol g^(-1)h^(-1))associated with 98.4%of styrene selectivity compared to the ND-based monolithic foam catalyst(ND/CNT-SiC).Moreover,the ND/CNT-Si C-ms-HN monolithic foam shows excellent long-term stability for the direct dehydrogenation of ethylbenzene to styrene.This work also comes up with a novel way of preparing other highly-dispersed nanocarbons-based monolithic foam catalysts with promising catalytic performance for diverse transformations.
基金Supported by Innovation Project of Guangxi Graduate Education(YCSW2023432).
文摘Digestive system diseases refer to organic and functional disorders of the digestive system,which are prone to recurrence and frequently accompanied by multiple complications.Necroptosis is a regulated mode of cell death mediated by death receptors,dependent on receptor protein activation,and could be specifically inhibited by necrostatin-1.Necroptosis is involved in pathological and physiological processes of various diseases,and plays an important role in the growth and development of organisms and the homeostasis of organ tissues.This paper reviewed the research advancement of necroptosis in digestive system disorders,and discussed the relationship between necroptosis and digestive system diseases,aiming to provide theoretical basis for the cure of these diseases.
基金We are grateful for financial support from the National Natural Science Foundation of China(21172102)the Ministry of Science and Technology of China(2013CB834804)the Fundamental Research Funds for the Central Universities(lzujbky-2013-47).
文摘A metal-free and environmentally friendly aerobic aromatization photosensitized by organic dye eosin Y bis(tetrabutyl ammonium salt)(TBA-eosinY)has been developed.With the aid of K_(2)CO_(3),the aerobic catalytic system converts 1,4-dihydropyridines to their corresponding pyridine derivatives efficiently under visible light irradiation(λ=450 nm)at room temperature.
