形貌可控及光学吸收性能可调的钙钛矿型SrTiO_3纳米结构的原位生长（英文）  

In-situ Synthesis of Perovskite SrTiO_3 Nanostructures with Modified Morphology and Tunable Optical Absorption Property

作　　者：刘小元 刘宝丹[1] 姜亚南[1] 王柯 周洋 杨兵[1] 张兴来[1] 姜辛[1] LIU Xiao-Yuan;LIU Bao-Dan;JIANG Ya-Nan;WANG Ke;ZHOU Yang;YANG Bing;ZHANG Xing-Lai;JIANG Xin(Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院金属研究所沈阳材料科学国家研究中心,沈阳110016 [2]中国科学技术大学材料科学与工程学院,合肥230026

出　　处：《无机材料学报》2019年第1期65-71,121-124,共8页Journal of Inorganic Materials

基　　金：National Natural Science Foundation of China(51702326,51872296);Knowledge Innovation Program of Institute of Metal Research,Chinese Academy of Sciences(Y2NCA111A1,No.Y3NCA111A1);Youth Innovation Promotion Association,Chinese Academy of Sciences(Y4NC711171);Basic Science Innovation Program of Shenyang National Laboratory for Materials Science(2017EP05,2017RP25)

摘　　要：钙钛矿相SrTiO_3在太阳能电池、光催化、燃料电池,超导等领域均有广泛应用,这些应用均与其晶体质量、形貌、暴露晶面和光学吸收等特性息息相关。本文通过微弧氧化-水热两步法原位制备了两种典型形貌的SrTiO_3纳米晶。结果表明,随着微弧氧化电解液锶源浓度的降低, SrTiO_3形貌从立方块状转变为超薄片状。进一步分析表明,所得的SrTiO_3立方块和Sr1-δTiO_3纳米片均为结晶质量良好的单晶体,通过分析两种形貌样品的紫外-可见漫反射光谱,发现Sr1-δTiO_3纳米片相对于SrTiO_3立方块,具有明显的尺寸效应诱导的光学吸收蓝移特性。最后,本研究提出了SrTiO_3的原位生长及形貌演变机制。As a perovskite family member,SrTiO3 shows significant applications in the fields of solar cells,photocatalysis,fuel cells and superconducting as a dependence of its crystallinity,morphology,crystal facet and optical properties.In this work,we reported an in-situ synthetic approach of SrTiO3 nanostructures with modified morphology and tunable optical absorption properties based on conventional plasma electrolytic oxidation (PEO) associated with hydrothermal method.The morphology of SrTiO3 nanostructures can be selectively modified from microcubes with smooth facets to ultrathin nanosheets by controlling the concentration of Sr source during PEO process.It is found that both SrTiO3 microcubes and Sr1–δTiO3 nanosheets are well-crystallized single crystals.UV-Vis diffuse reactance spectrum (DRS) measurement reveals that Sr1–δTiO3 nanosheets with thin thickness show obvious blue-shift of absorption edge in comparison with SrTiO3 microcubes due to the size effect.Finally,the morphology evolution and nucleation mechanism of SrTiO3 nanostructures in-situ grown on PEO film is discussed.

关 键 词：钛酸锶 原位生长 微弧氧化法 形貌调控 光学性能 

分 类 号：TQ174[化学工程—陶瓷工业]