المرسبة بتقنية الرش الحراري ZnO و 2S2SnO اختبار أداء التحفيز الضوئي للأغشية الرقيقة متعددة الطبقات من

Abstract

In this work, we prepared thin multi-layer films of ZnO and SnO2 using the chemical vapor deposition method. We used zinc acetate as a zinc source and tin chloride as a tin source on glass substrates at 450 °C in the Laboratory of Radiation and Plasma Surface Physics (LRPPS). In addition, we studied the structural, optical, and morphological properties of these samples, as well as their photostimulated properties. The results of FTIR analysis, which involved frequency scanning in the range of 390-4000 cm-1, revealed functional bonds in the deposited layers within the range of (<700 cm-1) and the presence of energy absorption peaks attributed to the (Zn-O) and (Sn-O-Sn) bonds. The results of scanning electron microscopy (SEM) showed that the deposited layers formed a crystalline network with particle agglomerates, which affected their homogeneity and made their surface rough. However, this roughness and agglomeration aid in their application in the field of photostimulation. This work also included the study of some optical properties by analyzing the deposited samples using visible and ultraviolet spectroscopy. The transmittance spectra showed a decrease with an increase in the number of layers. The energy bandgap was calculated using the Tauc law, and the obtained results indicated that the bandgap values of the single-layer films of zinc oxide and tin oxide matched the theoretical values. As for the bilayer samples, an increase in the energy gap was observed with an increase in the ZnO or SnO2 layer. The energy bandgap of the (ZnO/SnO2) sample was determined to be 3.42 eV, while the energy gap of the (SnO2/ZnO) sample was estimated to be 3.80 eV. Photostimulation tests of the (SnO2/ZnO) sample using methylene blue as a catalyst revealed that the sample acted as an efficient catalyst, with a degradation ratio exceeding 97%.