Institute of Advanced Technology, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia.
Department of Physics, Faculty of Science, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia.
Molecules. 2021 Feb 18;26(4):1061. doi: 10.3390/molecules26041061.
In this paper, the structural and optical properties of ZnO-SiO-based ceramics fabricated from oil palm empty fruit bunch (OPEFB) were investigated. The OPEFB waste was burned at 600, 700 and 800 °C to form palm ash and was then treated with sulfuric acid to extract silica from the ash. X-ray fluorescence (XRF) and X-ray diffraction (XRD) analyses confirmed the existence of SiO in the sample. Field emission scanning electron microscopy (FESEM) showed that the particles displayed an irregular shape and became finer after leaching. Then, the solid-state method was used to produce the ZnO-SiO composite and the samples were sintered at 600, 800, 1000, 1200 and 1400 °C. The XRD peaks of the ZnSiO showed high intensity, which indicated high crystallinity of the composite. FESEM images proved that the grain boundaries were larger as the temperature increased. Upon obtaining the absorbance spectrum from ultraviolet-visible (UV-Vis) spectroscopy, the energy band gaps obtained were 3.192, 3.202 and 3.214 eV at room temperature, 600 and 800 °C, respectively, and decreased to 3.127, 2.854 and 2.609 eV at 1000, 1200 and 1400 °C, respectively. OPEFB shows high potential as a silica source in producing promising optical materials.
本文研究了由油棕空果串（OPEFB）制备的 ZnO-SiO 基陶瓷的结构和光学性能。OPEFB 废物在 600、700 和 800°C 下燃烧以形成棕榈灰，然后用硫酸处理以从灰分中提取二氧化硅。X 射线荧光（XRF）和 X 射线衍射（XRD）分析证实了样品中存在 SiO。场发射扫描电子显微镜（FESEM）显示，颗粒呈不规则形状，浸出后变得更细。然后，采用固态法制备 ZnO-SiO 复合材料，将样品在 600、800、1000、1200 和 1400°C 下烧结。ZnSiO 的 XRD 峰具有高强度，表明复合材料具有高结晶度。FESEM 图像证明，随着温度的升高，晶粒边界变大。从紫外-可见（UV-Vis）光谱获得吸收光谱后，在室温、600 和 800°C 下获得的能带隙分别为 3.192、3.202 和 3.214 eV，在 1000、1200 和 1400°C 下分别降至 3.127、2.854 和 2.609 eV。OPEFB 作为一种生产有前途的光学材料的二氧化硅来源具有很大的潜力。
