Low dimensional CuI nanomaterials were synthesized in microemulsions containing cyclohexane, Triton X 100, n pentanol and aqueous solution. The redox reaction took place in this system and the final products CuI were ...Low dimensional CuI nanomaterials were synthesized in microemulsions containing cyclohexane, Triton X 100, n pentanol and aqueous solution. The redox reaction took place in this system and the final products CuI were obtained. It′s found that the morphology of CuI could be influenced a great deal by the experimental parameters such as w0 (the molar ratio of water to surfactant), reactant concentration and the aging time. Hexagonal or shuttle like CuI flakes, nanoparticles and nanofibers could be prepared respectively under certain conditions.展开更多
Reasonable design of heterojunction can greatly improve the photocatalytic hydrogen evolution activity of materials.Herein,p-n heterojunction of 2D/3D structure is constructed by the nanosheet of CoAl-LDH and rock-lik...Reasonable design of heterojunction can greatly improve the photocatalytic hydrogen evolution activity of materials.Herein,p-n heterojunction of 2D/3D structure is constructed by the nanosheet of CoAl-LDH and rock-like CuI.The introduction of CuI can make CoAl-LDH disperse better,which brings more reaction sites for the hydrogen evolution reaction.Meanwhile,the 2D/3D structure is conducive to the construction of p-n heterojunction between the CoAl-LDH and CuI.The optical and electrochemical properties of the material indicate that the separation and transference of photon-generated carriers are promoted by the p-n heterojunction.The activity of composite catalyst(CI-10)reaches a maximum of 3.59 mmol g^(−1) h^(−1) which is 28.5 times higher than that of CuI.Furthermore,the influence of the amount of CuI and pH value on the hydrogen evolution reaction is explored.Based on the band structures of CoAl-LDH and CuI,the mechanism of photocatalytic reaction of CI-10 is proposed.The p-n heterojunction constructed with the CuI as hole receptor provides a new way to enhance the activity of photocatalytic H_(2) evolution.展开更多
The electrochromic(EC)mechanisms of inorganic materials are usually based on reversible cation insertion/extraction or metal deposition/dissolution,which are plagued by ion trapping and dendrite growth,respectively.In...The electrochromic(EC)mechanisms of inorganic materials are usually based on reversible cation insertion/extraction or metal deposition/dissolution,which are plagued by ion trapping and dendrite growth,respectively.In this paper,a novel conversion-type electrochromic mechanism is proposed,by making good use of the CuI/Cu redox couple.This CuI-based electrochromic system shows a neutral color switching from transparent and dim grey.By simply increasing the bleaching voltage,I_(3)^(-)/I^(-)redox couple can be further activated.The generated I_(3)^(-)will readily react with Cu,effectively improving the conversion reversibility and thereby rejuvenating the degraded electrochromic performance.Thanks to the well-designed electrode and the self-healing ability,this conversion electrochromic system achieves rapid response times(tcoloring:23 s,tbleaching:6 s),decant optical modulation amplitude(26.4%),high coloration efficiency(86.15 cm^(2)·C^(-1)),admirable cyclic durability(without performance degradation after 480 cycles)and excellent optical memory ability(transmittance variation<1%after 10 h open-circuit storage).The establishment of this conversion-type electrochromism may inspire the exploration of novel electrochromic materials and devices.展开更多
文摘Low dimensional CuI nanomaterials were synthesized in microemulsions containing cyclohexane, Triton X 100, n pentanol and aqueous solution. The redox reaction took place in this system and the final products CuI were obtained. It′s found that the morphology of CuI could be influenced a great deal by the experimental parameters such as w0 (the molar ratio of water to surfactant), reactant concentration and the aging time. Hexagonal or shuttle like CuI flakes, nanoparticles and nanofibers could be prepared respectively under certain conditions.
基金financially supported by the National Natural Science Foundation of China(22062001)。
文摘Reasonable design of heterojunction can greatly improve the photocatalytic hydrogen evolution activity of materials.Herein,p-n heterojunction of 2D/3D structure is constructed by the nanosheet of CoAl-LDH and rock-like CuI.The introduction of CuI can make CoAl-LDH disperse better,which brings more reaction sites for the hydrogen evolution reaction.Meanwhile,the 2D/3D structure is conducive to the construction of p-n heterojunction between the CoAl-LDH and CuI.The optical and electrochemical properties of the material indicate that the separation and transference of photon-generated carriers are promoted by the p-n heterojunction.The activity of composite catalyst(CI-10)reaches a maximum of 3.59 mmol g^(−1) h^(−1) which is 28.5 times higher than that of CuI.Furthermore,the influence of the amount of CuI and pH value on the hydrogen evolution reaction is explored.Based on the band structures of CoAl-LDH and CuI,the mechanism of photocatalytic reaction of CI-10 is proposed.The p-n heterojunction constructed with the CuI as hole receptor provides a new way to enhance the activity of photocatalytic H_(2) evolution.
基金the National Natural Science Foundation of China(Nos.52371238,22273081,52207249)the Natural Science Foundation of Shandong Province(No.ZR2020ME024)+1 种基金Taishan Young Scholar Program(No.tsqn202211114)the Open Foundation of Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province(No.HPK202103)for financial support.
文摘The electrochromic(EC)mechanisms of inorganic materials are usually based on reversible cation insertion/extraction or metal deposition/dissolution,which are plagued by ion trapping and dendrite growth,respectively.In this paper,a novel conversion-type electrochromic mechanism is proposed,by making good use of the CuI/Cu redox couple.This CuI-based electrochromic system shows a neutral color switching from transparent and dim grey.By simply increasing the bleaching voltage,I_(3)^(-)/I^(-)redox couple can be further activated.The generated I_(3)^(-)will readily react with Cu,effectively improving the conversion reversibility and thereby rejuvenating the degraded electrochromic performance.Thanks to the well-designed electrode and the self-healing ability,this conversion electrochromic system achieves rapid response times(tcoloring:23 s,tbleaching:6 s),decant optical modulation amplitude(26.4%),high coloration efficiency(86.15 cm^(2)·C^(-1)),admirable cyclic durability(without performance degradation after 480 cycles)and excellent optical memory ability(transmittance variation<1%after 10 h open-circuit storage).The establishment of this conversion-type electrochromism may inspire the exploration of novel electrochromic materials and devices.
基金National Key Research and Development Program of China(2017YFA0303403)Shanghai Science and Technology Innovation Action Plan(19JC1416700)National Natural Science Foundation of China(62074056,61974042,11774092)。
