As typical quarternary copper-based chalcogenides,Cu–Zn–Sn–S nanocrystals(CZTS NCs)have emerged as a newfashioned electrocatalyst in hydrogen evolution reactions(HERs).Oleylamine(OM),a reducing surfactant and solve...As typical quarternary copper-based chalcogenides,Cu–Zn–Sn–S nanocrystals(CZTS NCs)have emerged as a newfashioned electrocatalyst in hydrogen evolution reactions(HERs).Oleylamine(OM),a reducing surfactant and solvent,plays a significant role in the assisting synthesis of CZTS NCs due to the ligand effect.Herein,we adopted a facile one-pot colloidal method for achieving the structure evolution of CZTS NCs from 2D nanosheets to 1D nanorods assisted through the continuous addition of OM.During the process,the mechanism of OM-induced morphology evolution was further discussed.When merely adding pure 1-dodecanethiol(DDT)as the solvent,the CZTS nanosheets were obtained.As OM was gradually added to the reaction,the CZTS NCs began to grow along the sides of the nanosheets and gradually shrink at the top,followed by the formation of stable nanorods.In acidic electrolytic conditions,the CZTS NCs with 1.0 OM addition display the optimal HER activity with a low overpotential of 561 m V at 10 m A/cm^(2) and a small Tafel slope of 157.6 m V/dec compared with other CZTS samples.The enhancement of HER activity could be attributed to the contribution of the synergistic effect of the diverse crystal facets to the reaction.展开更多
Hydrogen energy is a powerful and efficient energy resource,which can be produced by photocatalytic water split-ting.Among the photocatalysis,multinary copper-based chalcogenide semiconductor nanocrystals exhibit grea...Hydrogen energy is a powerful and efficient energy resource,which can be produced by photocatalytic water split-ting.Among the photocatalysis,multinary copper-based chalcogenide semiconductor nanocrystals exhibit great potential due to their tunable crystal structures,adjustable optical band gap,eco-friendly,and abundant resources.In this paper,Cu-Zn-Sn-S(CZTS)nanocrystals with different Cu content have been synthesized by using the one-pot method.By regulating the surface ligands,the reaction temperature,and the Cu content,kesterite and hexagonal wurtzite CZTS nanocrystals were obtained.The critical factors for the controllable transition between two phases were discussed.Subsequently,a series of quatern-ary CZTS nanocrystals with different Cu content were used for photocatalytic hydrogen evolution.And their band gap,energy level structure,and charge transfer ability were compared comprehensively.As a result,the pure hexagonal wurtzite CZTS nano-crystals have exhibited an improved photocatalytic hydrogen evolution activity.展开更多
Photocatalytic hydrogen evolution is one of the most promising ways to solve environmental problems and produce a sustainable energy source.To date,different types of photocatalysts have been developed and widely used...Photocatalytic hydrogen evolution is one of the most promising ways to solve environmental problems and produce a sustainable energy source.To date,different types of photocatalysts have been developed and widely used in photocatalytic hydrogen evolution.Recently,multinary copper chalcogenides have attracted much attention and exhibited potential applications in photocatalytic hydrogen evolution due to their composition-tunable band gaps,diverse structures and environmental-benign characteristics.In this review,some progress on the synthesis and photocatalytic hydrogen evolution of multinary copper chalcogenide nanocrystals(NCs)was summarized.In particular,considerable attention was paid to the rational design and dimensional or structural regulation of multinary copper chalcogenide NCs.Importantly,the photocatalytic hydrogen evolution of multinary copper chalcogenide NCs were reviewed from the aspects of energy level structures,crystal facets,morphology as well as composition.Finally,the current challenges and future perspectives of copper chalcogenide were proposed.展开更多
In the past five years,all-inorganic metal halide perovskite(CsPbX3,X=Cl,Br,I)nanocrystals have been intensely studied due to their outstanding optical properties and facile synthesis,which endow them with potential o...In the past five years,all-inorganic metal halide perovskite(CsPbX3,X=Cl,Br,I)nanocrystals have been intensely studied due to their outstanding optical properties and facile synthesis,which endow them with potential optoelectronic applications.In order to optimize their physical and chemical properties,different strategies have been developed to realize the controllable synthesis of CsPbX3 nanocrystals.In this short review,we firstly present a comprehensive and detailed summary of existed synthesis strategies of CsPbX3 nanocrystals and their analogues.Then,we introduce the regulations of several reaction parameters and their effects on the morphologies of CsPbX3 nanocrystals.At the same time,we provide stability improvement methods and representative applications.Finally,we propose the current challenges and future perspectives of the promising materials.展开更多
Nanowires(NWs)and self-assemble nanostructures made of chalcogenide semiconductor nanocrystals(NCs)are of great interests to the fundamental studies and practical applications.In this study,we reported a seeded-mediat...Nanowires(NWs)and self-assemble nanostructures made of chalcogenide semiconductor nanocrystals(NCs)are of great interests to the fundamental studies and practical applications.In this study,we reported a seeded-mediated growth of AgInS_(2)NWs and their intriguing self-assembly nanostructures with fingerprint-like shape.The key to the formation and self-assembly of AgInS_(2)NWs was the presence of In-S species that was a type of molecular metal chalcogenide complexes,serving as specific inorganic ligands for the growth of NWs and cross-linker molecules for the self-assembly of fingerprint-like nanostructures.Systematic studies were carried out to investigate the reaction factors,including the thermodynamics,amount and type of In precursors,and 1-dodecanethiol usage,to the success of the desired products.展开更多
Solution process is a key technique for the manufacture of large-area and low-cost semiconducting devices and,thus, attracts a lot of attention from both academia and industry. Herein, we realized solution-processed l...Solution process is a key technique for the manufacture of large-area and low-cost semiconducting devices and,thus, attracts a lot of attention from both academia and industry. Herein, we realized solution-processed lightemitting diodes(excluding a cathode) based on aggregation-induced emission(AIE) molecules of tetraphenylethylene-4Cl(TPE-4Cl) and cadimum-free semiconductor nanocrystals(NCs) for the first time. By mixing Cu-In-Zn-S NCs and TPE-4Cl as an emissive layer, a new type of environmentally friendly white-light-emitting diodes(WLEDs) was prepared through a solution-processed technique. After systematical optimization of the asprepared WLEDs, the corresponding color rendering index can reach up to 87 with a maximum luminance of262 cd/m2. This study may pave a new road to realize AIE-based WLEDs through a solution-processed technique.展开更多
基金partially supported by National Natural Science Foundation of China (12274021 and 62075005)。
文摘As typical quarternary copper-based chalcogenides,Cu–Zn–Sn–S nanocrystals(CZTS NCs)have emerged as a newfashioned electrocatalyst in hydrogen evolution reactions(HERs).Oleylamine(OM),a reducing surfactant and solvent,plays a significant role in the assisting synthesis of CZTS NCs due to the ligand effect.Herein,we adopted a facile one-pot colloidal method for achieving the structure evolution of CZTS NCs from 2D nanosheets to 1D nanorods assisted through the continuous addition of OM.During the process,the mechanism of OM-induced morphology evolution was further discussed.When merely adding pure 1-dodecanethiol(DDT)as the solvent,the CZTS nanosheets were obtained.As OM was gradually added to the reaction,the CZTS NCs began to grow along the sides of the nanosheets and gradually shrink at the top,followed by the formation of stable nanorods.In acidic electrolytic conditions,the CZTS NCs with 1.0 OM addition display the optimal HER activity with a low overpotential of 561 m V at 10 m A/cm^(2) and a small Tafel slope of 157.6 m V/dec compared with other CZTS samples.The enhancement of HER activity could be attributed to the contribution of the synergistic effect of the diverse crystal facets to the reaction.
基金the National Natural Science Foundation of China(Nos.61974009,62075005,and 62105019).
文摘Hydrogen energy is a powerful and efficient energy resource,which can be produced by photocatalytic water split-ting.Among the photocatalysis,multinary copper-based chalcogenide semiconductor nanocrystals exhibit great potential due to their tunable crystal structures,adjustable optical band gap,eco-friendly,and abundant resources.In this paper,Cu-Zn-Sn-S(CZTS)nanocrystals with different Cu content have been synthesized by using the one-pot method.By regulating the surface ligands,the reaction temperature,and the Cu content,kesterite and hexagonal wurtzite CZTS nanocrystals were obtained.The critical factors for the controllable transition between two phases were discussed.Subsequently,a series of quatern-ary CZTS nanocrystals with different Cu content were used for photocatalytic hydrogen evolution.And their band gap,energy level structure,and charge transfer ability were compared comprehensively.As a result,the pure hexagonal wurtzite CZTS nano-crystals have exhibited an improved photocatalytic hydrogen evolution activity.
基金the National Natural Science Foundation of China(Grant No.61974009)Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission(NERE201903).
文摘Photocatalytic hydrogen evolution is one of the most promising ways to solve environmental problems and produce a sustainable energy source.To date,different types of photocatalysts have been developed and widely used in photocatalytic hydrogen evolution.Recently,multinary copper chalcogenides have attracted much attention and exhibited potential applications in photocatalytic hydrogen evolution due to their composition-tunable band gaps,diverse structures and environmental-benign characteristics.In this review,some progress on the synthesis and photocatalytic hydrogen evolution of multinary copper chalcogenide nanocrystals(NCs)was summarized.In particular,considerable attention was paid to the rational design and dimensional or structural regulation of multinary copper chalcogenide NCs.Importantly,the photocatalytic hydrogen evolution of multinary copper chalcogenide NCs were reviewed from the aspects of energy level structures,crystal facets,morphology as well as composition.Finally,the current challenges and future perspectives of copper chalcogenide were proposed.
基金supported by the Fundamental Research Funds for the Central Universities(No.2019RC020)
文摘In the past five years,all-inorganic metal halide perovskite(CsPbX3,X=Cl,Br,I)nanocrystals have been intensely studied due to their outstanding optical properties and facile synthesis,which endow them with potential optoelectronic applications.In order to optimize their physical and chemical properties,different strategies have been developed to realize the controllable synthesis of CsPbX3 nanocrystals.In this short review,we firstly present a comprehensive and detailed summary of existed synthesis strategies of CsPbX3 nanocrystals and their analogues.Then,we introduce the regulations of several reaction parameters and their effects on the morphologies of CsPbX3 nanocrystals.At the same time,we provide stability improvement methods and representative applications.Finally,we propose the current challenges and future perspectives of the promising materials.
基金supported by the National Natural Science Foundation of China(Nos.61735004 and 61974009)the Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission(No.NERE201903)。
文摘Nanowires(NWs)and self-assemble nanostructures made of chalcogenide semiconductor nanocrystals(NCs)are of great interests to the fundamental studies and practical applications.In this study,we reported a seeded-mediated growth of AgInS_(2)NWs and their intriguing self-assembly nanostructures with fingerprint-like shape.The key to the formation and self-assembly of AgInS_(2)NWs was the presence of In-S species that was a type of molecular metal chalcogenide complexes,serving as specific inorganic ligands for the growth of NWs and cross-linker molecules for the self-assembly of fingerprint-like nanostructures.Systematic studies were carried out to investigate the reaction factors,including the thermodynamics,amount and type of In precursors,and 1-dodecanethiol usage,to the success of the desired products.
基金National Natural Science Foundation of China(61735004,61974009)。
文摘Solution process is a key technique for the manufacture of large-area and low-cost semiconducting devices and,thus, attracts a lot of attention from both academia and industry. Herein, we realized solution-processed lightemitting diodes(excluding a cathode) based on aggregation-induced emission(AIE) molecules of tetraphenylethylene-4Cl(TPE-4Cl) and cadimum-free semiconductor nanocrystals(NCs) for the first time. By mixing Cu-In-Zn-S NCs and TPE-4Cl as an emissive layer, a new type of environmentally friendly white-light-emitting diodes(WLEDs) was prepared through a solution-processed technique. After systematical optimization of the asprepared WLEDs, the corresponding color rendering index can reach up to 87 with a maximum luminance of262 cd/m2. This study may pave a new road to realize AIE-based WLEDs through a solution-processed technique.