A novel synthetic route for magnesium aluminate (MgAl2O4) nanoparticles using sol-gel auto combustion method and their photocatalytic properties
A novel synthetic route for magnesium aluminate (MgAl2O4) nanoparticles using sol-gel auto combustion method and their photocatalytic properties
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DOI：
10.1016/j.saa.2014.04.040
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发表时间：
2014-10-15
影响因子：
4.4
通讯作者：
Samir, Ihab
中科院分区：
文献类型：
--
作者：
Nassar, Mostafa Y.;Ahmed, Ibrahim S.;Samir, Ihab
本文提出了一种新的、廉价的制备尖晶石型铝酸镁纳米粒子(镁铝酸镁)的方法。以草酸、尿素和柠檬酸为燃料，采用溶胶-凝胶自燃烧法在350℃下合成了铝酸镁光催化剂，并在不同温度下焙烧。用上述燃料在800℃下焙烧得到了平均晶粒度分别为27.7、14.6和15.65 nm的纯尖晶石镁铝氧化物。用粉末X射线衍射仪、傅里叶变换红外光谱、紫外-可见光谱、透射电子显微镜、扫描电子显微镜对样品进行了表征。通过对活性艳红Me 4BL染料在紫外光和太阳光照射下的光催化降解，研究了合成产物的光催化活性。在紫外光和太阳光照射下，染料的光催化降解率分别为90.0%和95.45%，准一级反应速率常数分别为5.85×10(-3)和838×10(-3)min(-1)。(C)2014年提交人。由Elsevier B.V.出版。这是CC BY-NC-ND许可证(http://creativecommons.org/licenses/by-nc-nd/3.0/).下的一篇开放获取文章
In this paper a novel and inexpensive route for the preparation of spinel magnesium aluminate nanopartides (MgAl2O4) is proposed. Magnesium aluminate photocatalyst was synthesized via sol-gel auto combustion method using oxalic acid, urea, and citric acid fuels at 350 degrees C. Subsequently, the burnt samples were calcined at different temperatures. The pure spinel MgAl2O4 with average crystallite size 27.7, 14.6 and 15.65 nm was obtained at 800 degrees C calcinations using the aforementioned fuels, respectively. The obtained samples were characterized by powder X-ray diffraction, Fourier transform infrared, UV-Vis spectroscopy, transmission electron microscope, scanning electron microscope. The photo catalytic activity of MgAl2O4 product was studied by performing the decomposition of Reactive Red Me 4BL dye under UV illumination or sunlight irradiation. The dye considerably photocatalytically degraded by 90.0% and 95.45% under UV and sunlight irradiation, respectively, within ca. 5 h with pseudo first order rate constants of 5.85 x 10(-3) and 838 x 10(-3) min(-1), respectively. (C) 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).