Atarod Monireh, Nasrollahzadeh Mahmoud, Mohammad Sajadi S
Department of Chemistry, Faculty of Science, University of Qom, Qom 37185-359, Iran.
Department of Chemistry, Faculty of Science, University of Qom, Qom 37185-359, Iran.
J Colloid Interface Sci. 2016 Jan 15;462:272-9. doi: 10.1016/j.jcis.2015.09.073. Epub 2015 Oct 9.
This work reports a facile and green synthesis of Ag/TiO2 nanocomposite by extract of leaves of Euphorbia heterophylla without any stabilizer or surfactant. The green synthesized Ag/TiO2 nanocomposite was characterized by field emission scanning electron microscope (FESEM), energy-dispersive X-ray spectroscopy (EDS), fourier-transform infrared (FT-IR) spectroscopy, X-ray diffraction analysis (XRD) and UV-vis. The Ag/TiO2 nanocomposite was found to be effective catalyst for reduction of various dyes, such as 4-nitrophenol (4-NP), Methyl orange (MO), Congo red (CR) and Methylene blue (MB) in the presence of NaBH4 in water at room temperature. Catalysis reactions were monitored by employing UV-vis spectroscopy. Catalysis reactions followed pseudo-first order rate equation. The catalyst can be recovered and reused several times without significant loss of its catalytic activity.
这项工作报道了一种通过大戟叶提取物简便绿色合成Ag/TiO₂纳米复合材料的方法，无需任何稳定剂或表面活性剂。通过场发射扫描电子显微镜（FESEM）、能量色散X射线光谱（EDS）、傅里叶变换红外（FT-IR）光谱、X射线衍射分析（XRD）和紫外可见光谱对绿色合成的Ag/TiO₂纳米复合材料进行了表征。发现Ag/TiO₂纳米复合材料在室温下的水中，在NaBH₄存在下，是还原各种染料（如4-硝基苯酚（4-NP）、甲基橙（MO）、刚果红（CR）和亚甲基蓝（MB））的有效催化剂。通过紫外可见光谱监测催化反应。催化反应遵循准一级速率方程。该催化剂可以回收并重复使用多次，而其催化活性不会有明显损失。
