Studies of Effects of Calcination Temperature on the Crystallinity and Optical Properties of Ag-Doped ZnO Nanocomposites
Studies of Effects of Calcination Temperature on the Crystallinity and Optical Properties of Ag-Doped ZnO Nanocomposites
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DOI：
10.3390/jcs3010018
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发表时间：
2019-02
影响因子：
3.3
通讯作者：
Md. Ashraful Islam Molla;M. Furukawa;Ikki Tateishi;H. Katsumata;S. Kaneco
中科院分区：
文献类型：
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作者：
Md. Ashraful Islam Molla;M. Furukawa;Ikki Tateishi;H. Katsumata;S. Kaneco
采用一种简单、有效、高产率、低成本的机械化学燃烧法，在不同的煅烧温度和煅烧时间下成功地合成了Ag掺杂ZnO纳米复合材料。采用X射线衍射（XRD）、紫外-可见漫反射光谱（UV-DRS）、光致发光光谱（PL）和X射线光电子能谱（XPS）研究了煅烧温度对Ag/ZnO纳米复合材料结晶度和光学性能的影响。XRD分析表明，Ag/ZnO复合材料具有纤锌矿结构。在400 °C和700 °C的煅烧温度下，Ag/ZnO纳米复合材料的晶粒尺寸分别为19和46 nm。在500 °C煅烧3 h后，Ag/ZnO纳米复合材料在紫外区有最大吸收。对于在300-700 °C煅烧温度下获得的纳米复合材料，蓝色发射的峰位置几乎相同。在330 nm激发下未获得UV中的通常带边发射。在335-345 nm的低激发能量下观察到带边和蓝光带发射。
Ag-doped ZnO nanocomposites are successfully synthesized at different calcination temperatures and times through a simple, effective, high-yield and low-cost mechanochemical combustion technique. Effects of calcination temperature on the crystallinity and optical properties of Ag/ZnO nanocomposites have been studied by X-ray diffraction (XRD), UV−visible diffuse reflectance spectroscopy (UV-DRS), photoluminescence spectroscopy (PL) and X-ray photoelectron spectroscopy (XPS). The XRD patterns of the synthesized Ag/ZnO exhibit a well-crystalline wurtzite ZnO crystal structure. The grain size of Ag/ZnO nanocomposites is found to be 19 and 46 nm at calcination temperatures of 400 °C and 700 °C, respectively. The maximum absorption in the UV region is obtained for Ag/ZnO nanocomposites synthesized at a calcination temperature of 500 °C for 3 h. The peak position of blue emissions is almost the same for the nanocomposites obtained at 300–700 °C calcination temperatures. The usual band edge emission in the UV is not obtained at 330 nm excitation. Band edge and blue band emissions are observed for the use of low excitation energy at 335–345 nm.