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首页> 外文期刊>International Journal of Electrochemical Science >Effect of Annealing Temperature on Structural, Morphology and Optical Properties of ZnO Nano-Needles Prepared by Zinc-Air Cell System Method
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Effect of Annealing Temperature on Structural, Morphology and Optical Properties of ZnO Nano-Needles Prepared by Zinc-Air Cell System Method

机译：退火温度对锌-空气电池系统法制备的ZnO纳米针结构，形貌和光学性能的影响

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摘要

ZnO nano-needles have been synthesized successfully on zinc substrate with the zinc-air cell methodat room temperature. The effect of annealing temperature on the structure, morphology and opticalproperties of ZnO nano-needles were investigated using X-ray diffraction (XRD), Field EmissionScanning electron microscopy (FE-SEM) and ultraviolet-visible spectrometry (UV-Vis) techniques.XRD measurements indicated the presence of ZnO nano-needles with a hexagonal wurtzite structureo o and no external impurities. As the annealing temperature was increased from 400 C to 600 C theparticle size increased and the nano-needles became more orientated with average height between538.1 nm to 1195 nm. The UV-Vis measurements showed a slight decrease in absorbance and theabsorption edge shifted slightly to lower energy. The apparent increase in the band gap energy fromo 3.29 to 3.30eV over the 400-600 C temperature range is a variation of within 2% in the range, andcannot reliably be attributed to adverse effects such as defect formation at the high temperatures sinceit is within the measurement uncertainty. The nano-needles exhibit strong absorption peaks, whichdecrease with annealing temperature, in the wavelength range of ~360nm to 380nm. The nano- structures also exhibited increased crystallization strength. The absence of impurities after annealingwas confirmed using energy dispersive spectroscopy.
机译：在室温下，采用锌-空气电池法成功地在锌基底上合成了ZnO纳米针。利用X射线衍射（XRD），场发射扫描电子显微镜（FE-SEM）和紫外可见光谱（UV-Vis）技术研究了退火温度对ZnO纳米针的结构，形态和光学性能的影响。测量表明存在具有六方纤锌矿结构且没有外部杂质的ZnO纳米针。随着退火温度从400℃增加到600℃，颗粒尺寸增加并且纳米针变得更取向，平均高度在538.1nm至1195nm之间。 UV-Vis测量显示吸光度略有下降，吸收边缘略微偏移以降低能量。在400-600 C的温度范围内，带隙能量从3.29至3.30eV的明显增加是该范围内2％的变化，并且不能可靠地归因于诸如在高温下形成缺陷之类的不利影响。测量不确定度。纳米针在〜360nm至380nm的波长范围内表现出很强的吸收峰，随着吸收温度的升高而降低。纳米结构还表现出增加的结晶强度。使用能量色散光谱法确认了退火后不存在杂质。

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