兼容水和油分散性的二氧化锡量子点的制备及其晶体尺寸、晶面结构和能隙的调控  

Preparation of tin dioxide quantum dots dispersible in both water and oil with tunable crystal planes and sizes,and band gaps

作　　者：朱华艺 崔雨辰 习智原 章建辉[1] Zhu Huayi;Cui Yuchen;Xi Zhiyuan;Zhang Jianhui(National Laboratory of Solid State Microstructures,Collaborative Innovation Center of Advanced Microstructures,School of Physics,Nanjing University,Nanjing,210093,China)

机构地区：[1]固体微结构国家重点实验室,人工微结构科学与技术协同创新中心,南京大学物理学院,南京210093

出　　处：《南京大学学报(自然科学版)》2024年第6期1028-1035,共8页Journal of Nanjing University(Natural Science)

基　　金：国家重点科技发展计划(2016YFA0201604)

摘　　要：二氧化锡(SnO_(2))是一种直接带隙的本征半导体材料,常温下的体带隙约为3.6 eV,具有化学和热稳定性好、电子迁移率高、透光性好、成本低和无毒且环境友好等优点,被广泛应用于气敏传感器、催化材料、电极材料、光电材料及太阳能电池中.针对兼容水和油分散性的SnO_(2)的应用需求与现有SnO_(2)商品只能分散于水的矛盾,开发了一种溶剂热结晶的方法,成功制备了兼容水和油分散性的SnO_(2)量子点(SnO_(2)quantum dots,SnO_(2)QDs),通过调控溶剂热结晶时间(0~24 h),获得晶粒尺寸、能隙、(110)晶面占比分别在2.12~4.16 nm,3.72~4.15 eV和12.6%~43.3%可调的不同结晶质量的SnO_(2)QDs.所得量子点可应需要来稳定分散于水、乙醇、乙酸乙酯等多种水或油性溶剂中,形成可长期在室温下储存的黄色澄清的SnO_(2)QDs分散溶液.Tin dioxide(SnO_(2))is an intrinsic semiconductor material with direct band gap of about 3.6 eV at room temperature.Because of the advantages of good chemical and thermal stability,high electron mobility and light transmittance,low cost,non‐toxicity and environmental friendliness,SnO_(2) has been widely used in gas sensors,catalytic materials,electrode materials,photoelectric materials and solar cells.Aimed at the contradiction between the application requirement of SnO_(2) dispersible in both water and oil and commercial SnO_(2) dispersible only in water,a solvothermal crystallization method was developed to successfully prepare the SnO_(2) quantum dots(SnO_(2) QDs)dispersible in both water and oil solvents.By adjusting the solvothermal crystallization time(0~24 h),the crystal size,energy gap,and ratio of(110)plane of the obtained SnO_(2) QDs were modified in the ranges of 2.12~4.16 nm,3.72~4.15 eV and 12.6%~43.3%,respectively.The crystalline SnO_(2) QDs can be well dispersed in water,ethanol,ethyl acetate and other water or oily solvents as needed,to form a yellow transparent solution,which is long‐term stable at room temperature.

关 键 词：二氧化锡 量子点材料 晶面调控 带隙调节 

分 类 号：TN304.21[电子电信—物理电子学]