Abou Oualid Hicham, Amadine Othmane, Essamlali Younes, Dânoun Karim, Zahouily Mohamed
Laboratoire de Matériaux, Catalyse & Valorisation des Ressources Naturelles, URAC 24, Faculté des Sciences et Techniques, Université Hassan II Casablanca B.P. 146 20650 Morocco
MAScIR Foundation, VARENA Center, Rabat Design Rue Mohamed El Jazouli, Madinat Al Irfane 10100 Rabat Morocco.
RSC Adv. 2018 Jun 6;8(37):20737-20747. doi: 10.1039/c8ra02129e. eCollection 2018 Jun 5.
In the present study, we investigate a simple and effective synthetic protocol to produce zinc oxide foams by a facile solution-based method using alginate gelation. The influences of the zinc concentration and the drying process on the structural, textural and morphological properties of the synthesized ZnO nanomaterial were studied and discussed. The components of these nanomaterials were characterized by several techniques to demonstrate the effectiveness of the adopted synthetic route in controlling the growth of the ZnO nanoparticles. XRD analysis revealed that the as-prepared ZnO nanomaterial crystallizes in the hexagonal wurtzite structure. The room temperature photoluminescence (PL) spectra of ZnO show ultra-violet (UV) and visible emissions. SEM analysis revealed the porous texture of the prepared zinc oxide. TEM analysis confirmed the nano dimensions of the synthesized zinc oxide nanoparticles. A comparative study of conventional air drying supercritical drying was conducted to determine the influence of each mode of drying on the structural, textural and morphological as well as optical properties of the synthesized ZnO nanoparticles.
在本研究中，我们探索了一种简单有效的合成方案，通过基于藻酸盐凝胶化的简便溶液法制备氧化锌泡沫。研究并讨论了锌浓度和干燥过程对合成的氧化锌纳米材料的结构、织构和形态性质的影响。通过多种技术对这些纳米材料的成分进行了表征，以证明所采用的合成路线在控制氧化锌纳米颗粒生长方面的有效性。X射线衍射（XRD）分析表明，所制备的氧化锌纳米材料结晶为六方纤锌矿结构。氧化锌的室温光致发光（PL）光谱显示出紫外（UV）和可见光发射。扫描电子显微镜（SEM）分析揭示了所制备氧化锌的多孔织构。透射电子显微镜（TEM）分析证实了合成的氧化锌纳米颗粒的纳米尺寸。对传统空气干燥和超临界干燥进行了对比研究，以确定每种干燥方式对合成的氧化锌纳米颗粒的结构、织构、形态以及光学性质的影响。
