Despite their attractive features of high energy density,low cost,and safety,polysulfide/iodide flow batteries(SIFBs)are hampered by the sluggish kinetics of the iodide redox couple,which restricts overall performance...Despite their attractive features of high energy density,low cost,and safety,polysulfide/iodide flow batteries(SIFBs)are hampered by the sluggish kinetics of the iodide redox couple,which restricts overall performance.Multicomponent sulfides are demonstrated as promising catalysts for accelerating I^(-)/I_(3)^(-) redox reactions.Concurrently,the enhanced configurational entropy arising from multinary compositions drives synergistic effects among constituent elements,establishing a viable pathway to optimize catalytic performance.Building on these foundations,this work introduces a targeted orbital hybridization-optimized electron density strategy to enhance the catalytic activity.Implementing this concept,we developed an in-situ solvothermal synthesis process for an entropy-enhanced AgCuZnSnS_(4) loaded graphite felt(ACZTS/GF)electrode.The engineered electrode demonstrates exceptional electrocatalytic performance with improved bulk conductivity and interfacial charge transfer kinetics within a SIFB.The cell achieves a high energy efficiency of 88.5%at 20 mA·cm^(−2) with 10%state-of-charge.Furthermore,the battery delivers a maximum power density of 119.8 mW·cm^(−2) and exhibits excellent long-term cycling stability.These significant results stem from orbital hybridization-driven electronic state optimization and entropy effect-induced synergistic catalysis.展开更多
Poly(3-hexylthiophene)(P3HT)has been used in CsPbI_(3)per-ovskite solar cells(PSCs)as the hole transport layer(HTL),due to its excellent hydrophobic prop-erty and cheap cost.However,the inevitable defects in perovskit...Poly(3-hexylthiophene)(P3HT)has been used in CsPbI_(3)per-ovskite solar cells(PSCs)as the hole transport layer(HTL),due to its excellent hydrophobic prop-erty and cheap cost.However,the inevitable defects in perovskite lead to the limited photovoltaic performance of CsPbI_(3)PSCs.In this study,diethylammonium io-dide(DEAI)was doped as an ad-ditive to passivate the defects in P3HT based CsPbI_(3)perovskite.Considering the diethylamine cations can effectively form hydrogen bonds with halide ion,the DEAI doping method could not only reduce the defect density but also facilitate the extraction and transport of carriers in the device.The optimal power conversion efficiency of the device prepared with DEAI doping method increases from 14.68%to 16.75%.In addition,the stability of the device is also signifi-cantly upgraded due to the improvement of CsPbI_(3)perovskite film.This work can provide re-liable theoretical and experimental evidence for further PSCs research.展开更多
OBJECTIVE To examine the possibility of human sodium iodide symporter （hNIS） protein expression in lung cancer cells. METHODS Human lung A549 cancer cells were thawed and cultured in vitro. The cells were divided in...OBJECTIVE To examine the possibility of human sodium iodide symporter （hNIS） protein expression in lung cancer cells. METHODS Human lung A549 cancer cells were thawed and cultured in vitro. The cells were divided into an experimental group transfected with a recombinant pcDNA3-hNIS plasmid and a control group transfected only with a pcDNA3 plasmid. The recombinant plasmid vector encoding the hNIS gene （pcDNA3-hNIS） was amplified, purified and identified. The hNIS gene was followed by DNA sequencing. A Western blot and an immunohistochemical assay were applied to detect the hNIS protein expression in the transfected human lung A549 cancer cells. RESULTS Restriction enzyme digestion and DNA sequencing results showed the size and direction of the inserted gene in the recombinant pcD- NA3-hNIS plasmid was correct. The Western blot method and immunohistochemical analysis showed a positive NIS protein expression in the experimental group. The NIS protein was detected mainly in the cell membranes showing a positive rate up to 70.6% with no expression of the NIS protein in the control group. There was a significant difference between two groups （P=0.000）. CONCLUSION The hNIS gene was transfected effectively into human lung A549 cancer cells mediated by Lipofectamine 2000, and was expressed with its protein in vitro.展开更多
Gold extraction by iodine-iodide solution is an effective and environment-friendly method. In this study, the method using iodine-iodide for gold leaching is proved feasible through thermodynamic calculation. At the s...Gold extraction by iodine-iodide solution is an effective and environment-friendly method. In this study, the method using iodine-iodide for gold leaching is proved feasible through thermodynamic calculation. At the same time, experiments on flotation gold concentrates were carried out and encouraging results were obtained. Through optimizing the technological conditions, the attained high gold leaching rate is more than 85%. The optimum process conditions at 25℃ are shown as follows： the initial iodine concentration is 1.0%, the iodine-to-iodide mole ratio is 1：8, the solution pH value is 7, the liquid-to-solid mass ratio is 4：1, the leaching time is 4 h, the stirring intensity is 200 r/mim, and the hydrogen peroxide consumption is 1%.展开更多
A novel flow-injection irreversible biamperometric method is described for the direct determination of iodide. The method is based on electrochemical oxidation of iodide at the gold electrode and the reduction of perm...A novel flow-injection irreversible biamperometric method is described for the direct determination of iodide. The method is based on electrochemical oxidation of iodide at the gold electrode and the reduction of permanganate at the platinum electrode to form an irreversible biamperometric detection system. Under the applied potential difference of 0 V, in the 0.05 mol/L sulfuric acid, iodidecan be determined over the range 4.00×10^-7-1.00×10^-5 mol/L with a sampling frequency of 120 samples per hour. The detection limit for I- is 3.0×10^-7 mol/L and the RSD for 40 replicate determinations of 4.0×10^-5 mol/L potassium iodide is 1.68%. The new method was applied to the analysis of iodide in table salt with satisfactory results.展开更多
Poly（4-vinyl pyridine） supported nanoparticle of copper（Ⅰ） iodide is reported as a green and recyclable catalyst for the regioselective synthesis of 1,4-disubstituted-1H-1,2,3-triazoles from benzyl halides,sodium...Poly（4-vinyl pyridine） supported nanoparticle of copper（Ⅰ） iodide is reported as a green and recyclable catalyst for the regioselective synthesis of 1,4-disubstituted-1H-1,2,3-triazoles from benzyl halides,sodium azide and terminal alkynes in water. This catalyst can be recovered by simple filtration and recycled up to 8 consecutive runs without any loss of its efficiency.展开更多
基金supported by the National Natural Science Foundation of China(Nos.22171180,22461142137,and 22478242)the Shanghai Municipal Science and Technology Major Project,China.
文摘Despite their attractive features of high energy density,low cost,and safety,polysulfide/iodide flow batteries(SIFBs)are hampered by the sluggish kinetics of the iodide redox couple,which restricts overall performance.Multicomponent sulfides are demonstrated as promising catalysts for accelerating I^(-)/I_(3)^(-) redox reactions.Concurrently,the enhanced configurational entropy arising from multinary compositions drives synergistic effects among constituent elements,establishing a viable pathway to optimize catalytic performance.Building on these foundations,this work introduces a targeted orbital hybridization-optimized electron density strategy to enhance the catalytic activity.Implementing this concept,we developed an in-situ solvothermal synthesis process for an entropy-enhanced AgCuZnSnS_(4) loaded graphite felt(ACZTS/GF)electrode.The engineered electrode demonstrates exceptional electrocatalytic performance with improved bulk conductivity and interfacial charge transfer kinetics within a SIFB.The cell achieves a high energy efficiency of 88.5%at 20 mA·cm^(−2) with 10%state-of-charge.Furthermore,the battery delivers a maximum power density of 119.8 mW·cm^(−2) and exhibits excellent long-term cycling stability.These significant results stem from orbital hybridization-driven electronic state optimization and entropy effect-induced synergistic catalysis.
基金supported by the National Natural Scientific Foundation of China(No.62305243)Fundamental Research Program of Shanxi Province(Nos.20210302124629,20210302124163,20210302124392,202203021212217)funded by China Scholarship Council。
文摘Poly(3-hexylthiophene)(P3HT)has been used in CsPbI_(3)per-ovskite solar cells(PSCs)as the hole transport layer(HTL),due to its excellent hydrophobic prop-erty and cheap cost.However,the inevitable defects in perovskite lead to the limited photovoltaic performance of CsPbI_(3)PSCs.In this study,diethylammonium io-dide(DEAI)was doped as an ad-ditive to passivate the defects in P3HT based CsPbI_(3)perovskite.Considering the diethylamine cations can effectively form hydrogen bonds with halide ion,the DEAI doping method could not only reduce the defect density but also facilitate the extraction and transport of carriers in the device.The optimal power conversion efficiency of the device prepared with DEAI doping method increases from 14.68%to 16.75%.In addition,the stability of the device is also signifi-cantly upgraded due to the improvement of CsPbI_(3)perovskite film.This work can provide re-liable theoretical and experimental evidence for further PSCs research.
文摘OBJECTIVE To examine the possibility of human sodium iodide symporter （hNIS） protein expression in lung cancer cells. METHODS Human lung A549 cancer cells were thawed and cultured in vitro. The cells were divided into an experimental group transfected with a recombinant pcDNA3-hNIS plasmid and a control group transfected only with a pcDNA3 plasmid. The recombinant plasmid vector encoding the hNIS gene （pcDNA3-hNIS） was amplified, purified and identified. The hNIS gene was followed by DNA sequencing. A Western blot and an immunohistochemical assay were applied to detect the hNIS protein expression in the transfected human lung A549 cancer cells. RESULTS Restriction enzyme digestion and DNA sequencing results showed the size and direction of the inserted gene in the recombinant pcD- NA3-hNIS plasmid was correct. The Western blot method and immunohistochemical analysis showed a positive NIS protein expression in the experimental group. The NIS protein was detected mainly in the cell membranes showing a positive rate up to 70.6% with no expression of the NIS protein in the control group. There was a significant difference between two groups （P=0.000）. CONCLUSION The hNIS gene was transfected effectively into human lung A549 cancer cells mediated by Lipofectamine 2000, and was expressed with its protein in vitro.
基金financially supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (No. 20100006110003)
文摘Gold extraction by iodine-iodide solution is an effective and environment-friendly method. In this study, the method using iodine-iodide for gold leaching is proved feasible through thermodynamic calculation. At the same time, experiments on flotation gold concentrates were carried out and encouraging results were obtained. Through optimizing the technological conditions, the attained high gold leaching rate is more than 85%. The optimum process conditions at 25℃ are shown as follows： the initial iodine concentration is 1.0%, the iodine-to-iodide mole ratio is 1：8, the solution pH value is 7, the liquid-to-solid mass ratio is 4：1, the leaching time is 4 h, the stirring intensity is 200 r/mim, and the hydrogen peroxide consumption is 1%.
基金support of the Guangxi Science Fund For Youth(No.0135003)Guangxi Universities One Hundred Young-middle Scholar Fund for the present work.
文摘A novel flow-injection irreversible biamperometric method is described for the direct determination of iodide. The method is based on electrochemical oxidation of iodide at the gold electrode and the reduction of permanganate at the platinum electrode to form an irreversible biamperometric detection system. Under the applied potential difference of 0 V, in the 0.05 mol/L sulfuric acid, iodidecan be determined over the range 4.00×10^-7-1.00×10^-5 mol/L with a sampling frequency of 120 samples per hour. The detection limit for I- is 3.0×10^-7 mol/L and the RSD for 40 replicate determinations of 4.0×10^-5 mol/L potassium iodide is 1.68%. The new method was applied to the analysis of iodide in table salt with satisfactory results.
文摘Poly（4-vinyl pyridine） supported nanoparticle of copper（Ⅰ） iodide is reported as a green and recyclable catalyst for the regioselective synthesis of 1,4-disubstituted-1H-1,2,3-triazoles from benzyl halides,sodium azide and terminal alkynes in water. This catalyst can be recovered by simple filtration and recycled up to 8 consecutive runs without any loss of its efficiency.
