以5,5′-联四唑-1,1′-二羟基二水化合物（H2BTO·2H2O）和2-甲基咪唑为原料合成了一种新的5,5′-联四唑-1,1′-二氧-2-甲基咪唑含能离子盐（M2BTO）。采用X-射线单晶衍射、FT-IR、1 H NMR、13 C NMR和元素分析进行了结构表征;利用...以5,5′-联四唑-1,1′-二羟基二水化合物（H2BTO·2H2O）和2-甲基咪唑为原料合成了一种新的5,5′-联四唑-1,1′-二氧-2-甲基咪唑含能离子盐（M2BTO）。采用X-射线单晶衍射、FT-IR、1 H NMR、13 C NMR和元素分析进行了结构表征;利用差示扫描量热分析（DSC）和热重-微分热重分析（TG-DTG）研究了该含能离子盐的热分解过程及其非等温分解反应动力学;利用Kamlet-Jacobs经验公式对其爆速、爆压参数进行了理论计算;采用WL-1型撞击感度测试仪测定了M2BTO的特性落高H50;采用Kissinger法和Ozawa法计算了其反应活化能。结果表明,M2BTO晶体属于三斜晶系,P-1空间群,晶胞参数为：a=0.538 60（5）nm,b=0.726 76（6）nm,c=1.111 49（11）nm,V=401.00（6）×10^-3nm3,ρ=1.534g/cm3,Z=1;M2BTO分解峰值温度为542.1K,TG曲线上只存在一个失重阶段,该阶段位于503.5-568.2K,失重为78.2%,表明其有较好的热稳定性;表观活化能为134.7kJ/mol（Kissinger法）和136.7kJ/mol（Ozawa法）,二者一致性较好,指前因子1n（A/s-1）=29.33;其爆速、爆压的理论计算值分别为7 104m/s、20.23GPa,特性落高（H50）大于61.0cm。展开更多
Titanium dioxide(TiO2)has garnered attention for its promising photocatalytic activity,energy storage capability,low cost,high chemical stability,and nontoxicity.However,conventional TiO2 has low energy harvesting eff...Titanium dioxide(TiO2)has garnered attention for its promising photocatalytic activity,energy storage capability,low cost,high chemical stability,and nontoxicity.However,conventional TiO2 has low energy harvesting efficiency and charge separation ability,though the recently developed black TiO2 formed under high temperature or pressure has achieved elevated performance.The phase-selectively ordered/disordered blue TiO2(BTO),which has visible-light absorption and efficient exciton disassociation,can be formed under normal pressure and temperature(NPT)conditions.This perspective article first discusses TiO2 materials development milestones and insights of the BTO structure and construction mechanism.Then,current applications of BTO and potential extensions are summarized and suggested,respectively,including hydrogen(H2)production,carbon dioxide(CO2)and nitrogen(N2)reduction,pollutant degradation,microbial disinfection,and energy storage.Last,future research prospects are proposed for BTO to advance energy and environmental sustainability by exploiting different strategies and aspects.The unique NPT-synthesized BTO can offer more societally beneficial applications if its potential is fully explored by the research community.展开更多
文摘以5,5′-联四唑-1,1′-二羟基二水化合物（H2BTO·2H2O）和2-甲基咪唑为原料合成了一种新的5,5′-联四唑-1,1′-二氧-2-甲基咪唑含能离子盐（M2BTO）。采用X-射线单晶衍射、FT-IR、1 H NMR、13 C NMR和元素分析进行了结构表征;利用差示扫描量热分析（DSC）和热重-微分热重分析（TG-DTG）研究了该含能离子盐的热分解过程及其非等温分解反应动力学;利用Kamlet-Jacobs经验公式对其爆速、爆压参数进行了理论计算;采用WL-1型撞击感度测试仪测定了M2BTO的特性落高H50;采用Kissinger法和Ozawa法计算了其反应活化能。结果表明,M2BTO晶体属于三斜晶系,P-1空间群,晶胞参数为：a=0.538 60（5）nm,b=0.726 76（6）nm,c=1.111 49（11）nm,V=401.00（6）×10^-3nm3,ρ=1.534g/cm3,Z=1;M2BTO分解峰值温度为542.1K,TG曲线上只存在一个失重阶段,该阶段位于503.5-568.2K,失重为78.2%,表明其有较好的热稳定性;表观活化能为134.7kJ/mol（Kissinger法）和136.7kJ/mol（Ozawa法）,二者一致性较好,指前因子1n（A/s-1）=29.33;其爆速、爆压的理论计算值分别为7 104m/s、20.23GPa,特性落高（H50）大于61.0cm。
基金This work was supported by the Institute for Basic Science(IBS-R011-D1)partially supported by the Korea Evaluation Institute of Industrial Technology(20004627)the INNOPOLIS Foundation(2019-DD-SB-0602).
文摘Titanium dioxide(TiO2)has garnered attention for its promising photocatalytic activity,energy storage capability,low cost,high chemical stability,and nontoxicity.However,conventional TiO2 has low energy harvesting efficiency and charge separation ability,though the recently developed black TiO2 formed under high temperature or pressure has achieved elevated performance.The phase-selectively ordered/disordered blue TiO2(BTO),which has visible-light absorption and efficient exciton disassociation,can be formed under normal pressure and temperature(NPT)conditions.This perspective article first discusses TiO2 materials development milestones and insights of the BTO structure and construction mechanism.Then,current applications of BTO and potential extensions are summarized and suggested,respectively,including hydrogen(H2)production,carbon dioxide(CO2)and nitrogen(N2)reduction,pollutant degradation,microbial disinfection,and energy storage.Last,future research prospects are proposed for BTO to advance energy and environmental sustainability by exploiting different strategies and aspects.The unique NPT-synthesized BTO can offer more societally beneficial applications if its potential is fully explored by the research community.
