A general method for facile kinetics-controlled growth of aligned arrays of mesocrystalline SnO2 nanorods on arbitrary substrates has been developed by adjusting supersaturation in a unique ternary solvent system comp...A general method for facile kinetics-controlled growth of aligned arrays of mesocrystalline SnO2 nanorods on arbitrary substrates has been developed by adjusting supersaturation in a unique ternary solvent system comprising acetic acid, ethanol and water. The hydrolysis processes of Sn（IV） as well as the nucleation and growth of SnO2 crystals were carefully controlled in the mixed solvents, leading to an exclusively heterogeneous nucleation on a substrate and the subsequent growth into mesocrystalline nanorod arrays. In particular, aligned arrays of hierarchically structured, [001]-oriented mesocrystalline SnO2 nanorods with four {110} lateral facets can be readily grown on Ti foil as well as many other inert substrates such as fluoride-doped tin oxide （FTO）, Si, graphite, and polytetrafluoroethylene （Teflon）. Due to the unique combination of the mesocrystalline structure and the one-dimensional nanoarray structure, the obtained mesocrystalline SnO2 nanorod arrays grown on metallic Ti substrate exhibited an excellent rate performance with a high initial Coulombic efficiency of 65.6% and a reversible capacity of 720 mA.h/g at a charge/discharge rate of 10 C （namely, 7,820 mA/g） when used as an anode material for lithium-ion batteries.展开更多
Over the past decades,there have been many synthesis methods on producing well-defined crystals,due to their enormous application potentials in industrial field.Among them,high temperature gas-phase reactions(HTGR)app...Over the past decades,there have been many synthesis methods on producing well-defined crystals,due to their enormous application potentials in industrial field.Among them,high temperature gas-phase reactions(HTGR)approach may be one of the most promising processes for fabrication of well-defined crystals with controllable structure,size,shape,and composition.This review is focused on the recent progresses in synthesizing well-defined crystalline TiO2dominated with,respectively,{001}facets and{105}facets,one-dimensional ZnO and SnO2nanorods/nanowires,MoS2nanosheets as well as GaP,InP,and GaAs nanowires via HTGR approach.Although these research works were currently carried out on experimental scale,it is worth to note that the industrial importance of this HTGR approach for design and fabrication of well-defined crystals in the future owing to its advantages of continuous and scalable production with controlled dimensions and low cost.展开更多
文摘A general method for facile kinetics-controlled growth of aligned arrays of mesocrystalline SnO2 nanorods on arbitrary substrates has been developed by adjusting supersaturation in a unique ternary solvent system comprising acetic acid, ethanol and water. The hydrolysis processes of Sn（IV） as well as the nucleation and growth of SnO2 crystals were carefully controlled in the mixed solvents, leading to an exclusively heterogeneous nucleation on a substrate and the subsequent growth into mesocrystalline nanorod arrays. In particular, aligned arrays of hierarchically structured, [001]-oriented mesocrystalline SnO2 nanorods with four {110} lateral facets can be readily grown on Ti foil as well as many other inert substrates such as fluoride-doped tin oxide （FTO）, Si, graphite, and polytetrafluoroethylene （Teflon）. Due to the unique combination of the mesocrystalline structure and the one-dimensional nanoarray structure, the obtained mesocrystalline SnO2 nanorod arrays grown on metallic Ti substrate exhibited an excellent rate performance with a high initial Coulombic efficiency of 65.6% and a reversible capacity of 720 mA.h/g at a charge/discharge rate of 10 C （namely, 7,820 mA/g） when used as an anode material for lithium-ion batteries.
基金supported by the National Natural Science Foundation of China (91022023,21076076)the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry (SRF for ROCS,SEM)+2 种基金Programme for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher LearningMajor Basic Research Programme of Science and Technology Commission of Shanghai Municipality (10JC1403200)Shanghai Municipal Natural Science Foundation (12ZR1407500)
文摘Over the past decades,there have been many synthesis methods on producing well-defined crystals,due to their enormous application potentials in industrial field.Among them,high temperature gas-phase reactions(HTGR)approach may be one of the most promising processes for fabrication of well-defined crystals with controllable structure,size,shape,and composition.This review is focused on the recent progresses in synthesizing well-defined crystalline TiO2dominated with,respectively,{001}facets and{105}facets,one-dimensional ZnO and SnO2nanorods/nanowires,MoS2nanosheets as well as GaP,InP,and GaAs nanowires via HTGR approach.Although these research works were currently carried out on experimental scale,it is worth to note that the industrial importance of this HTGR approach for design and fabrication of well-defined crystals in the future owing to its advantages of continuous and scalable production with controlled dimensions and low cost.
