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摘要
以硝酸铜为铜源、硝酸铝为铝源,以草酸为沉淀剂,采用微波辅助合成p型半导体CuAlO2纳米晶。通过X射线衍射仪(XRD)、傅里叶红外光谱(FT-IR)、紫外可见吸收光谱(UV-Vis)和激光粒度分析仪对其物相结构、化学性能、光学性质和粒径大小进行了表征分析,并对反应机理进行了讨论。研究了煅烧温度、原料配比等因素对产品结构的影响。结果表明:当Cu2+和Al3+摩尔比为1∶1,煅烧温度为1200℃时,样品为纯的CuAlO2晶相,晶粒大小为41nm;样品含有与氢键缔合的OH基;其禁带宽度为4.53eV,与块体材料相比,发生了蓝移,其归因于晶粒减小而产生量子效应所致。
Abstract
Using copper nitrate as the source of copper,aluminum nitrate as alumina source and oxalic acid as the precipitator,the p-type CuAlO2 nanocrystals were prepared via the microwave assisted procedure.By X-ray diffraction (XRD),fourier transform infrared spectroscopy (FT-IR),ultraviolet-visible absorption spectroscopy (UV-Vis) and laser particle size analyzer,the phase structure,chemical as well as optical properties,and particle sizes were characterized.The reaction mechanism was discussed.The influence of calcination temperature and ratio of raw materials on product structure was investigated.The results showed that when the mole ratio of Cu2+ and Al3+ was 1∶1,the sample was pure CuAlO2 phase at 1200℃,its crystallite size of 41nm.The sample contained OH group via the hydrogen bond association.The width of gap band was 4.53eV.Compared with that of block material,the blue shift happened,assigned to quantum effects caused by the decrease of crystallites.
关键词
X射线衍射
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p型半导体
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CuAlO2
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纳米晶
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微波
Key words
X-ray diffraction (XRD)
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p-type semiconductor
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CuAlO2
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nanocrystallite
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microwave
微波辅助合成CuAlO2纳米晶及其光学性能的研究[J].
化工新型材料, 2018, 46(1): 75-78 DOI:
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基金资助
湖南省教育厅资助科研项目(17B138);湖南人文科技学院校级科研项目(16QN11);湖南省自然科学基金(2016JJ4044);湖南省科技计划项目(2016TP1028);国家自然科学基金(51602101)
