首页> 外文期刊>Journal of Nanoparticle Research >In situ generated gas bubble-assisted modulation of the morphologies, photocatalytic, and magnetic properties of ferric oxide nanostructures synthesized by thermal decomposition of iron nitrate
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In situ generated gas bubble-assisted modulation of the morphologies, photocatalytic, and magnetic properties of ferric oxide nanostructures synthesized by thermal decomposition of iron nitrate

机译:原位产生的气泡辅助调节硝酸铁热分解合成的三氧化二铁纳米结构的形貌,光催化和磁性

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摘要

Ferric oxide (Fe2O3) complex nanoarchitectures with high BET specific surface area, superior photocatalytic activity and modulated magnetic properties are facilely synthesized via controlled thermal decomposition of iron(III) nitrate nonahydrate. The products are characterized by X-ray diffraction, Fourier-transforming infrared spectra, field-emission scanning electron microscope, field-emission high-resolution transmission electron microscope, and nitrogen physisorption and micrometrics analyzer. The corresponding photocatalytic activity and static magnetic properties are also evaluated by measuring the photocatalytic degradation of Rhodamine B aqueous solution under visible light illumination and vibrating sample magnetometer, respectively. Simply tuning the decomposition temperature can conveniently modulate the adsorbing/desorbing behaviors of the in situ generated gases on the nucleus surfaces, and consequently the crystalline structures and morphologies of the Fe2O3 complex nanoarchitectures. The as-prepared Fe2O3 complex nanoarchitectures show strong crystal structure and/or morphology-dependent photocatalytic and magnetic performances. The Fe2O3 complex nanoarchitectures with high specific surface area and favorable crystallization are found to be beneficial for improving the photocatalytic activity. This work not only reports a convenient and low-cost decomposition procedure and a novel formation mechanism of complex nanoarchitectures but also provides an efficient route to enhance catalytic and magnetic properties of Fe2O3.
机译:通过控制铁的热分解容易地合成了具有高BET比表面积,优异的光催化活性和调节的磁性的三氧化二铁(Fe 2 O 3 )复杂的纳米结构。硝酸九水合物。产品具有X射线衍射,傅立叶变换红外光谱,场发射扫描电子显微镜,场发射高分辨率透射电子显微镜以及氮物理吸附和测微分析仪的特征。还分别通过在可见光照射和振动样品磁力计下测量罗丹明B水溶液的光催化降解来评估相应的光催化活性和静磁性能。只需简单地调节分解温度就可以方便地调节原位生成气体在核表面上的吸附/解吸行为,从而调节Fe 2 O 3 复杂的纳米结构。制备的Fe 2 O 3 复杂纳米结构具有很强的晶体结构和/或形貌依赖性的光催化和磁性能。发现具有高比表面积和良好结晶性的Fe 2 O 3 复杂纳米结构有助于提高光催化活性。这项工作不仅报告了方便,低成本的分解过程,还提出了新颖的复杂纳米结构形成机理,并且为增强Fe 2 O 3 的催化和磁性提供了一条有效途径。子>。

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