%0 Journal Article
%T 核壳结构Ta<sub>2</sub>O<sub>5</sub>@Ta<sub>3</sub>N<sub>5</sub>纳米花控制合成工艺研究<br> Controllable Synthesis of Core-Shell Structure Ta<sub>2</sub>O<sub>5</sub>@Ta<sub>3</sub>N<sub>5</sub> Nanoflowers
%A 董鑫
%J Material Sciences
%P 253-260
%@ 2160-7621
%D 2023
%I Hans Publishing
%R 10.12677/MS.2023.134030
%X 以TaCl<sub>5</sub>为钽源，采用水热–高温氮化法合成核壳结构Ta<sub>2</sub>O<sub>5</sub>@Ta<sub>3</sub>N<sub>5</sub>纳米花。首先，利用场发射扫描电子显微镜(SEM)测试评价样品形貌，研究溶剂种类、异丙醇用量、盐酸用量、水热时间等条件因素对样品形貌调控规律；异丙醇溶剂有利于促进棒状结构生成，当异丙醇用量为14 mL，浓盐酸用量为400 μL，经160℃水热4 h制得<span>Ta</span><sub>2</sub><span>O</span><sub>5</sub>纳米花，组成纳米花的棒状结构直径约50 nm，长约200 nm。再利用高温氮化技术，在50 mL？min？1 NH3气流下，经850℃氮化3 h，<span>Ta</span><sub>2</sub><span>O</span><sub>5</sub>纳米花经拓扑转换制得核壳结构<span>Ta</span><sub>2</sub><span>O</span><sub>5</sub><span>@Ta</span><sub>3</sub><span>N</span><sub>5</sub>纳米花。XRD分析证实样品具有<span>Ta</span><sub>2</sub><span>O</span><sub>5</sub>和<span>Ta</span><sub>3</sub><span>N</span><sub>5</sub>双相结构，晶化度较高；HRTEM分析表明样品形成<span>Ta</span><sub>2</sub><span>O</span><sub>5</sub>/<span>Ta</span><sub>3</sub><span>N</span><sub>5</sub>；BET比表面积为21.9 m<sup>2</sup>？g<sup>？1</sup>。本文为进一步开展<span>Ta</span><sub>2</sub><span>O</span><sub>5</sub><span>@Ta</span><sub>3</sub><span>N</span><sub>5</sub>基纳米材料的制备及应用性能研究奠定实验技术基础。<br />
Ta2O5@Ta3N5 nanoflowers were synthesized by a combination of hydrothermal and high-tempe- rature nitridation method, using TaCl<sub>5</sub> as the tantalum source. Based on the morphology evaluated by field emission scanning electron micros-copy (SEM), the preparation process of Ta<sub>2</sub>O<sub>5</sub> nanoflowers was optimized by regulating process conditions including solvent type, amount of isopropanol, amount of hydrochloric acid, and hydrother-mal time. Isopropanol solvent is beneficial to promote the formation of rod-like structure. When the amount of isopropanol is 14 mL and the amount of concentrated hydrochloric acid is 400 μL, Ta<sub>2</sub>O<sub>5</sub> nanoflowers are prepared by hydrothermal treatment at 160？C for 4 h. The rod-like structure of nanoflowers is about 50 nm in diameter and about 200 nm in length. Then, Ta<sub>2</sub>O<sub>5</sub>@Ta<sub>3</sub>N<sub>5</sub> nanoflowers were prepared by topological transformation of Ta<sub>2</sub>O<sub>5</sub> nanoflowers, using high-temperature nitriding technology, under 50 mL？min<sup>？1</sup> NH<sub>3</sub> gas flow, after nitriding at 850？C for 3 h. XRD analysis confirmed that the sample possessed both Ta<sub>2</sub>O<sub>5</sub> and Ta<sub>3</sub>N<sub>5</sub> phases with a high crystallization de-gree. HRTEM analysis indicated that the sample exhibited core-shell structure <span>Ta</span><sub>2</sub><span>O</span><sub>5</sub><span>@Ta</span><sub>3</sub><span>N</span><sub>5</sub>. Its BET specific area was 21.9 m<sup>2</sup>？g<sup>？1</sup>. This work lays an experimental technical foundation for further research on preparation and application
%K Ta<sub>2</sub>O<sub>5</sub>@Ta<sub>3</sub>N<sub>5</sub>纳米花，水热合成，高温氮化，控制合成，核壳结构，拓扑转换，晶化度
Ta<sub>2</sub>O<sub>5</sub>@Ta<sub>3</sub>N<sub>5</sub> Nanoflowers
%K Hydrothermal Synthesis
%K High-Temperature Nitridation
%K Controllable Synthesis
%K Core-Shell Structure
%K Topological Transformation
%K Crystallization Degree
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=63928