It is significant for the rational construction of the high–efficient bifunctional electrocatalysts for in–depth understandings of how to improve the electron transfer and ion/oxygen transport in catalyzing oxygen r...It is significant for the rational construction of the high–efficient bifunctional electrocatalysts for in–depth understandings of how to improve the electron transfer and ion/oxygen transport in catalyzing oxygen reduction reaction and oxygen evolution reaction(ORR and OER),but still full of vital challenges.Herein,we synthesize the novel“three–in–one”catalyst that engineers core–shell Mott–Schottky Co_(9)S_(8)/Co heterostructure on the defective reduced graphene oxide(Co_(9)S_(8)/Co–rGO).The Co_(9)S_(8)/Co–rGO catalyst exhibits abundant Mott–Schottky heterogeneous–interfaces,the well–defined core–shell nanostructure as well as the defective carbon architecture,which provide the multiple guarantees for enhancing the electron transfer and ion/oxygen transport,thus boosting the catalytic ORR and OER activities in neutral electrolyte.As expected,the integrated core–shell Mott–Schottky Co_(9)S_(8)/Co–rGO catalyst delivers the most robust and efficient rechargeable ZABs performance in neutral solution electrolytes accompanied with a power density of 59.5 mW cm^(-2) and superior cycling stability at 5 mA cm^(-2) over 200 h.This work not only emphasizes the rational designing of the high–efficient bifunctional oxygen catalysts from the fundamental understanding of accelerating the electron transfer and ion/oxygen transport,but also sheds light on the practical application prospects in more friendly environmentally neutral rechargeable ZABs.展开更多
Earth-abundant magnetite(Fe_(3)O_(4))as cathode materials in aqueous zinc-ion batteries(ZIBs)is limited by its very low capacity and poor cycling.Here,a combined strategy based on carbon coating and electrolyte optimi...Earth-abundant magnetite(Fe_(3)O_(4))as cathode materials in aqueous zinc-ion batteries(ZIBs)is limited by its very low capacity and poor cycling.Here,a combined strategy based on carbon coating and electrolyte optimization is adopted to improve the performance of Fe_(3)O_(4).The Zn-Fe_(3)O_(4)@C batteries display specific capacities of 93 mAh g^(−1) and 81%capacity retention after 200 cycles.Such performance is attributed to the enhanced electrical conductivity and structural stability of Fe_(3)O_(4)@C nanocomposites with suppressed iron dissolution.Experimental analysis reveals that the charge storage is contributed by diffusion-limited redox reactions and surface-controlled pseudocapacitance.A stretchable Zn-Fe_(3)O_(4)@C battery is further fabricated,showing stable performance when it is bent or stretched.Fe_(3)O_(4) is a promising cathode material for cost-effective,safe,sustainable and wearable energy supplies.展开更多
Cardiac resident macrophages (CRMs) are the main population of cardiac immune cells. The role of these cells in regeneration, functional remodeling, and repair after cardiac injury is always the focus of research. How...Cardiac resident macrophages (CRMs) are the main population of cardiac immune cells. The role of these cells in regeneration, functional remodeling, and repair after cardiac injury is always the focus of research. However, in recent years, their dynamic changes and contributions in physiological states have a significant attention. CRMs have specific phenotypes and functions in different cardiac chambers or locations of the heart and at different stages. They further show specific differentiation and development processes. The present review will summarize the new progress about the spatiotemporal distribution, potential developmental regulation, and their roles in cardiac development and aging as well as the translational potential of CRMs on cardiac diseases. Of course, the research tools for CRMs, their respective advantages and disadvantages, and key issues on CRMs will further be discussed.展开更多
To monitor the freshness of chicken,a pH-sensitive film based on sodium alginate,gelatin,and plum peel extract(SGPE)was created.Thickness,color,water contact angle,mechanical characteristics,water content,water vapor ...To monitor the freshness of chicken,a pH-sensitive film based on sodium alginate,gelatin,and plum peel extract(SGPE)was created.Thickness,color,water contact angle,mechanical characteristics,water content,water vapor transmission,light transmission,and pH sensitivity were used to evaluate the performance of the film sample.SEM and FTIR graphs demonstrated that adding plum peel extract made the SGPE film’s internal structure more denser and increased its mechanical property,while decreasing the water contact angle,water content,and WVP value.The color of the SGPE15 film clearly changed from red to yellow-green in various buffer solutions(pH=1-14),demonstrating more pH sensitivity than the SG,SGPE5,and SGPE10 films.On day 6,when checking the freshness of chicken kept at 4℃,the SGPE15 film’s color changed from orange-pink to yellow-green with TVB-N level beyond the allowable limit(15 mg/100 g).The result revealed that the SGPE film might be applied to monitor the freshness of chicken breast flesh.展开更多
Purpose:In line with a recent call for side effects research in education,this article aims to synthesize the major concerns that have been raised in the literature concerning large-scale assessments(LSAs)in education...Purpose:In line with a recent call for side effects research in education,this article aims to synthesize the major concerns that have been raised in the literature concerning large-scale assessments(LSAs)in education.Design/Approach/Methods:The researchers endeavored to complete a deep review of the literature on LSAs to synthesize the reported side effects.The review was synthesized thematically to understand and report the consequences of the ongoing push for the use of LSA in education.Findings:Thematic analysis indicated overarching side effects of LSA in education.We discuss why negative side effects exist and present evidence of the most commonly observed side effects of LSA in education,including distorting education,exacerbating inequity and injustice,demoralization of professionals,ethical corruption,and stifling of innovation in education.Originality/Value:While concerns about the use and misuse of LSA in education are not new and have been discussed widely in the literature,rarely have they been discussed as inherent qualities and consequences of LSAs that can do harm to education.展开更多
Rechargeable aqueous zinc-ion batteries(ZIBs)featuring low cost,superior performance,and environmental benignity have attracted dramatic atten-tion as a promising alternative energy storage system to lithium-ion batte...Rechargeable aqueous zinc-ion batteries(ZIBs)featuring low cost,superior performance,and environmental benignity have attracted dramatic atten-tion as a promising alternative energy storage system to lithium-ion batteries.Nevertheless,the development of ZIBs is still hindered by the limited selection of cathode materials due to the large solvation sheath and charge density of Zn^(2+).Two-dimensional(2D)materials have attracted extraor-dinary attention owing to the unique layered structure bonded by weak van der Waals'forces,which makes them promising host materials for Zn^(2+)intercalation/de-intercalation.In this review,the synthesis and properties of 2D materials for cathodes in ZIBs are discussed.Meanwhile,various re-ports on 2D materials as ZIBs cathodes are summarized.Three key strategies to elicit improved Zn2+storage abilities:defect engineering,hetero-structure engineering,and interlayer engineering,are highlighted.Finally,this review ends with perspectives relating to the challenges and opportu-nities of 2D materials-based ZIBs.展开更多
基金financially supported by the National Natural Science Foundation of China (21775142)the Sino–German Center for Research Promotion (Grants GZ 1351)+1 种基金the Natural Science Foundation of Shandong Province (ZR2020ZD10)the Research Funds for the Central Universities (202061031)。
文摘It is significant for the rational construction of the high–efficient bifunctional electrocatalysts for in–depth understandings of how to improve the electron transfer and ion/oxygen transport in catalyzing oxygen reduction reaction and oxygen evolution reaction(ORR and OER),but still full of vital challenges.Herein,we synthesize the novel“three–in–one”catalyst that engineers core–shell Mott–Schottky Co_(9)S_(8)/Co heterostructure on the defective reduced graphene oxide(Co_(9)S_(8)/Co–rGO).The Co_(9)S_(8)/Co–rGO catalyst exhibits abundant Mott–Schottky heterogeneous–interfaces,the well–defined core–shell nanostructure as well as the defective carbon architecture,which provide the multiple guarantees for enhancing the electron transfer and ion/oxygen transport,thus boosting the catalytic ORR and OER activities in neutral electrolyte.As expected,the integrated core–shell Mott–Schottky Co_(9)S_(8)/Co–rGO catalyst delivers the most robust and efficient rechargeable ZABs performance in neutral solution electrolytes accompanied with a power density of 59.5 mW cm^(-2) and superior cycling stability at 5 mA cm^(-2) over 200 h.This work not only emphasizes the rational designing of the high–efficient bifunctional oxygen catalysts from the fundamental understanding of accelerating the electron transfer and ion/oxygen transport,but also sheds light on the practical application prospects in more friendly environmentally neutral rechargeable ZABs.
基金This work was supported by National Natural Science Foundation of China(51873088)the Tianjin Municipal Science and Technology Commission(18JCZDJC38400)in China.
文摘Earth-abundant magnetite(Fe_(3)O_(4))as cathode materials in aqueous zinc-ion batteries(ZIBs)is limited by its very low capacity and poor cycling.Here,a combined strategy based on carbon coating and electrolyte optimization is adopted to improve the performance of Fe_(3)O_(4).The Zn-Fe_(3)O_(4)@C batteries display specific capacities of 93 mAh g^(−1) and 81%capacity retention after 200 cycles.Such performance is attributed to the enhanced electrical conductivity and structural stability of Fe_(3)O_(4)@C nanocomposites with suppressed iron dissolution.Experimental analysis reveals that the charge storage is contributed by diffusion-limited redox reactions and surface-controlled pseudocapacitance.A stretchable Zn-Fe_(3)O_(4)@C battery is further fabricated,showing stable performance when it is bent or stretched.Fe_(3)O_(4) is a promising cathode material for cost-effective,safe,sustainable and wearable energy supplies.
基金This work was supported by the National Natural Science Foundation of China(Grant Nos.32370984 and 82101914)Six Talent Peaks Project in Jiangsu Province(2019-WSN-122,China)+2 种基金Projects of International Cooperation from Jiangsu Province(BX2019100,China)Key Funds from the Health Commission of Jiangsu Province(ZD2021009,China)the Social Development Foundation of Zhenjiang(SH2022060,China).
文摘Cardiac resident macrophages (CRMs) are the main population of cardiac immune cells. The role of these cells in regeneration, functional remodeling, and repair after cardiac injury is always the focus of research. However, in recent years, their dynamic changes and contributions in physiological states have a significant attention. CRMs have specific phenotypes and functions in different cardiac chambers or locations of the heart and at different stages. They further show specific differentiation and development processes. The present review will summarize the new progress about the spatiotemporal distribution, potential developmental regulation, and their roles in cardiac development and aging as well as the translational potential of CRMs on cardiac diseases. Of course, the research tools for CRMs, their respective advantages and disadvantages, and key issues on CRMs will further be discussed.
基金support from the National Natural Science Foundation of China(No.22268024,32060569,and 21576126).
文摘To monitor the freshness of chicken,a pH-sensitive film based on sodium alginate,gelatin,and plum peel extract(SGPE)was created.Thickness,color,water contact angle,mechanical characteristics,water content,water vapor transmission,light transmission,and pH sensitivity were used to evaluate the performance of the film sample.SEM and FTIR graphs demonstrated that adding plum peel extract made the SGPE film’s internal structure more denser and increased its mechanical property,while decreasing the water contact angle,water content,and WVP value.The color of the SGPE15 film clearly changed from red to yellow-green in various buffer solutions(pH=1-14),demonstrating more pH sensitivity than the SG,SGPE5,and SGPE10 films.On day 6,when checking the freshness of chicken kept at 4℃,the SGPE15 film’s color changed from orange-pink to yellow-green with TVB-N level beyond the allowable limit(15 mg/100 g).The result revealed that the SGPE film might be applied to monitor the freshness of chicken breast flesh.
文摘Purpose:In line with a recent call for side effects research in education,this article aims to synthesize the major concerns that have been raised in the literature concerning large-scale assessments(LSAs)in education.Design/Approach/Methods:The researchers endeavored to complete a deep review of the literature on LSAs to synthesize the reported side effects.The review was synthesized thematically to understand and report the consequences of the ongoing push for the use of LSA in education.Findings:Thematic analysis indicated overarching side effects of LSA in education.We discuss why negative side effects exist and present evidence of the most commonly observed side effects of LSA in education,including distorting education,exacerbating inequity and injustice,demoralization of professionals,ethical corruption,and stifling of innovation in education.Originality/Value:While concerns about the use and misuse of LSA in education are not new and have been discussed widely in the literature,rarely have they been discussed as inherent qualities and consequences of LSAs that can do harm to education.
基金supported by NSFC(Nos.51873088,12004195)Tianjin Municipal Science and Technology Commission(Nos.20JCQNJC01820,18ZLZXZF00480)111Project(No.B18030)in China.
文摘Rechargeable aqueous zinc-ion batteries(ZIBs)featuring low cost,superior performance,and environmental benignity have attracted dramatic atten-tion as a promising alternative energy storage system to lithium-ion batteries.Nevertheless,the development of ZIBs is still hindered by the limited selection of cathode materials due to the large solvation sheath and charge density of Zn^(2+).Two-dimensional(2D)materials have attracted extraor-dinary attention owing to the unique layered structure bonded by weak van der Waals'forces,which makes them promising host materials for Zn^(2+)intercalation/de-intercalation.In this review,the synthesis and properties of 2D materials for cathodes in ZIBs are discussed.Meanwhile,various re-ports on 2D materials as ZIBs cathodes are summarized.Three key strategies to elicit improved Zn2+storage abilities:defect engineering,hetero-structure engineering,and interlayer engineering,are highlighted.Finally,this review ends with perspectives relating to the challenges and opportu-nities of 2D materials-based ZIBs.
