Two surfaces correponding to LaCl_3 and α-solid solution(MgCl_2.LiCl) respectively: and one secondary crystallization curve with a minimum M at 63.8 wt-％ LaCl_3,2.0 wt-％ MgCl_2,34.2 wt-％ LiCl and 492℃ were fonud ...Two surfaces correponding to LaCl_3 and α-solid solution(MgCl_2.LiCl) respectively: and one secondary crystallization curve with a minimum M at 63.8 wt-％ LaCl_3,2.0 wt-％ MgCl_2,34.2 wt-％ LiCl and 492℃ were fonud by means of DTA.In combination with liquidus determination.an approach was also made to the alteration in LnCl_3-MgCl_2-LiCl svstem,where Lu denotes La.Ce.Pr or Nd.展开更多
Cucumber seedlings were sprayed with different concentrations of LaCl_3 for 3 d continuously. After 7 d of this treatment, the plants were treated with 1200 mg·L^(-1) 2,4-dichlorophennoxy(2,4-D) for 24 h. The lea...Cucumber seedlings were sprayed with different concentrations of LaCl_3 for 3 d continuously. After 7 d of this treatment, the plants were treated with 1200 mg·L^(-1) 2,4-dichlorophennoxy(2,4-D) for 24 h. The leaves were harvested and rinsed with 5 mmol·L^(-1) EDTA. The concentrations of photosynthetic pigments, soluble protein and metabolites related to oxidative stress and the activities of antioxidant enzymes in leaves were assayed. The results show that the treatment with appropriate concentration of LaCl_3 has resistant effect on oxidative stress induced by 2, 4-D. Proper concentration of LaCl_3 promotes the activity of antioxidant system in plants and alleviates the damage caused by 2, 4-D.展开更多
Dissolutionof La in KCl-NaCl and LaCl_3-KCl-NaCl melts has been investigated by means of a transparent cell,cyclic voltammetry and EHMO of quantum chemistry.It is shown that the La dissolved in KCl-NaCl melt exists in...Dissolutionof La in KCl-NaCl and LaCl_3-KCl-NaCl melts has been investigated by means of a transparent cell,cyclic voltammetry and EHMO of quantum chemistry.It is shown that the La dissolved in KCl-NaCl melt exists in a metallic state,the La dissolved in LaCl_3-KCl-NaCl melt can be ionized into La^(2+) as a result of reaction with La^(3+), furthermore,the La^(2+) reacts with La^(3+) forming atom cluster La_m^(n+) which is a stable state in the melt.展开更多
1.IntroductionDunn and Farrington[1]found that theNa ion in Naβ″-alumina single crystal canbe exchanged completely or partially withGd;,Nd;,Eu;,Yb;,Sm;,Tb;,Dy;,Bi;and Pr;ions,but no reports havebeen published about ...1.IntroductionDunn and Farrington[1]found that theNa ion in Naβ″-alumina single crystal canbe exchanged completely or partially withGd;,Nd;,Eu;,Yb;,Sm;,Tb;,Dy;,Bi;and Pr;ions,but no reports havebeen published about the ion exchange reac-tion between La3+ and Naβ″-alumina.If anion exchanged polycrystalline β″-alumina isavailable and its ionic conductivity is highenough to be applied as a solid electrolyte inthe galvanic cell,it can be used in various展开更多
Sodium-based halide solid electrolytes offer excellent electrochemical stability and favorable interfacial compatibility,yet their low ionic conductivity at room temperature limits their application in all-solidstate ...Sodium-based halide solid electrolytes offer excellent electrochemical stability and favorable interfacial compatibility,yet their low ionic conductivity at room temperature limits their application in all-solidstate Na-ion batteries(ASSNIBs),Here,we develop a series of LaCl_(3)-based sodium superionic conductors engineered through cation vacancy-concentration modulation,which facilitates the formation of a threedimensional Na+transport network and increases the density of ion-hopping sites.The optimized Na_(0.4)Ta_(0.236)La_(0.472)Cl_(3)(NTLC)electrolyte achieves a Na+conductivity of 1.38×10^(-3) S/cm at 30℃,with a reduced activation energy of 0.26 eV.It also exhibits excellent mechanical deformation and moderate high-voltage stability,resulting in enhanced interfacial compatibility.When paired directly with an uncoated NaCrO_(2) cathode,the NTLC catholyte enables ASSNIBs to cycle stably over 300 cycles with89.7%capacity retention at 0.3 C and room temperature.This work underscores the potential of vacancy-rich LaCl_(3)-based sodium superionic conductors for advancing high-performance ASSNIBs.展开更多
本文利用盆栽实验研究了 L a Cl3对烟草幼苗的生物效应。在烟苗长到 3～ 4片叶时 ,用不同浓度的 L a-Cl3溶液喷施 ,实验结果表明 :2 5～ 75 m g/ L L a Cl3的溶液均能促进烟苗的生长 ,增加株高、单株干重和根干重 ,提高根 /冠比 ,增加...本文利用盆栽实验研究了 L a Cl3对烟草幼苗的生物效应。在烟苗长到 3～ 4片叶时 ,用不同浓度的 L a-Cl3溶液喷施 ,实验结果表明 :2 5～ 75 m g/ L L a Cl3的溶液均能促进烟苗的生长 ,增加株高、单株干重和根干重 ,提高根 /冠比 ,增加叶片的叶绿素含量和提高叶片的净光合速率。处理的烟苗抗寒性也有所增强。烟苗在 0～ 2℃的低温下 ,原生质结构破坏的程度减轻 ,外渗物质的量减少 ,处理的比对照的电导率减少 0 .0 1～ 0 .18× 10 - 4 s/ m。喷 L a Cl3溶液的烟苗叶片总含水量有所下降 ,但束缚水含量提高 。展开更多
文摘Two surfaces correponding to LaCl_3 and α-solid solution(MgCl_2.LiCl) respectively: and one secondary crystallization curve with a minimum M at 63.8 wt-％ LaCl_3,2.0 wt-％ MgCl_2,34.2 wt-％ LiCl and 492℃ were fonud by means of DTA.In combination with liquidus determination.an approach was also made to the alteration in LnCl_3-MgCl_2-LiCl svstem,where Lu denotes La.Ce.Pr or Nd.
文摘Cucumber seedlings were sprayed with different concentrations of LaCl_3 for 3 d continuously. After 7 d of this treatment, the plants were treated with 1200 mg·L^(-1) 2,4-dichlorophennoxy(2,4-D) for 24 h. The leaves were harvested and rinsed with 5 mmol·L^(-1) EDTA. The concentrations of photosynthetic pigments, soluble protein and metabolites related to oxidative stress and the activities of antioxidant enzymes in leaves were assayed. The results show that the treatment with appropriate concentration of LaCl_3 has resistant effect on oxidative stress induced by 2, 4-D. Proper concentration of LaCl_3 promotes the activity of antioxidant system in plants and alleviates the damage caused by 2, 4-D.
文摘Dissolutionof La in KCl-NaCl and LaCl_3-KCl-NaCl melts has been investigated by means of a transparent cell,cyclic voltammetry and EHMO of quantum chemistry.It is shown that the La dissolved in KCl-NaCl melt exists in a metallic state,the La dissolved in LaCl_3-KCl-NaCl melt can be ionized into La^(2+) as a result of reaction with La^(3+), furthermore,the La^(2+) reacts with La^(3+) forming atom cluster La_m^(n+) which is a stable state in the melt.
文摘1.IntroductionDunn and Farrington[1]found that theNa ion in Naβ″-alumina single crystal canbe exchanged completely or partially withGd;,Nd;,Eu;,Yb;,Sm;,Tb;,Dy;,Bi;and Pr;ions,but no reports havebeen published about the ion exchange reac-tion between La3+ and Naβ″-alumina.If anion exchanged polycrystalline β″-alumina isavailable and its ionic conductivity is highenough to be applied as a solid electrolyte inthe galvanic cell,it can be used in various
基金Financial supports from the National Natural Science Foundation of China(22479009)the National related project。
文摘Sodium-based halide solid electrolytes offer excellent electrochemical stability and favorable interfacial compatibility,yet their low ionic conductivity at room temperature limits their application in all-solidstate Na-ion batteries(ASSNIBs),Here,we develop a series of LaCl_(3)-based sodium superionic conductors engineered through cation vacancy-concentration modulation,which facilitates the formation of a threedimensional Na+transport network and increases the density of ion-hopping sites.The optimized Na_(0.4)Ta_(0.236)La_(0.472)Cl_(3)(NTLC)electrolyte achieves a Na+conductivity of 1.38×10^(-3) S/cm at 30℃,with a reduced activation energy of 0.26 eV.It also exhibits excellent mechanical deformation and moderate high-voltage stability,resulting in enhanced interfacial compatibility.When paired directly with an uncoated NaCrO_(2) cathode,the NTLC catholyte enables ASSNIBs to cycle stably over 300 cycles with89.7%capacity retention at 0.3 C and room temperature.This work underscores the potential of vacancy-rich LaCl_(3)-based sodium superionic conductors for advancing high-performance ASSNIBs.
文摘本文利用盆栽实验研究了 L a Cl3对烟草幼苗的生物效应。在烟苗长到 3～ 4片叶时 ,用不同浓度的 L a-Cl3溶液喷施 ,实验结果表明 :2 5～ 75 m g/ L L a Cl3的溶液均能促进烟苗的生长 ,增加株高、单株干重和根干重 ,提高根 /冠比 ,增加叶片的叶绿素含量和提高叶片的净光合速率。处理的烟苗抗寒性也有所增强。烟苗在 0～ 2℃的低温下 ,原生质结构破坏的程度减轻 ,外渗物质的量减少 ,处理的比对照的电导率减少 0 .0 1～ 0 .18× 10 - 4 s/ m。喷 L a Cl3溶液的烟苗叶片总含水量有所下降 ,但束缚水含量提高 。
