基于形貌可控自支持SnO2纳米阵列合成及气体敏感与电化学性能研究

研究不使用模板支撑和生长基底层,通过调节水热反应前驱体溶液体系自身热力学特性,和利用晶体结构本征各向异性进行调控生长,水热合成自支持分级SnO2纳米有序阵列及晶体生长新机制; 研究通过对前驱体反应体系化学成份、溶液反应体系配比的控制，对反应前驱体溶液进行微波、超声等物理手段介入处理等措施，获得不同形貌自支持分级SnO2一维纳米有序阵列, 实现不同形貌分级SnO2纳米有序阵列的可调控合成; 研究不同形貌自支持分级SnO2纳米有序阵作为气体敏感材料的优异性能及机理,将自支持SnO2一维纳米有序阵列用作锂离子电池负极材料的电化学性能。.项目通过多种途径设计、构筑各种形貌SnO2纳米有序阵列，有效调控材料结构、形貌、微观尺寸,实现形貌可控合成以改进和提高SnO2纳米阵列的电化学性能、气体敏感性能等。研究一维纳米阵列的制备新方法, 晶体生长新机制与应用新领域具有重要科学意义。

The major study from project includes the following: (1) The hydrothermal synthesis and the new crystal growth mechanism of the self-support hierarchical SnO2 ordered nanoarrays through its own thermodynamic properties of the precursor solution system, the controllable experimental parameters of the hydrothermal reaction and the crystal structure of the intrinsic anisotropy of the crystal护growth, without not only the supported template and the growth basal layer, but also the auxiliary of toxic organic solvents and hazardous volatile. (2) The different morphologies of the self-support hierarchical SnO2 ordered nanoarrays were obtained from adjustment the chemical composition and ratio of the reaction system solution, and the interventional treatments by some physical means, such as microwave, ultrasonic and other physical means, which achieve the controllable formation of the orderly hierarchical anaoarray SnO2 nanostructure. (3) The excellent properties and the electrochemical performance of the different morphologies of the self-support hierarchical SnO2 ordered nanoarray used as gas sensitive materials, and used as anode materials for lithium ion battery, respectively..Through a variety of routes to design, construction of the SnO2 nanoarray structures to effectively control the nanostructure, morphology, microscopic size, in order to achieve the improvement and enhancement of the gas sensitive properties and the electrochemical properties of the self-support hierarchical SnO2 ordered nanoarrays with different morphologies by controllable synthesis in this project. These researches have important scientific significance for developing new preparation technology, new crystal growth mechanism and new applications of the hierarchical SnO2 nanoarray.