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Hydrothermal Synthesis and UV Irradiation Shielding Per- formances of Nanometer Cerium (IV) Oxide Thin Films
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Hydrothermal Synthesis and UV Irradiation Shielding Per- formances of Nanometer Cerium (IV) Oxide Thin Films
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Institution of Higher Learning Innovative Teams of Liaoning (LT2012020)

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    摘要:

    以硝酸鈰和尿素為原料，采用水熱合成法在玻璃基底上制備了具有高反射率和良好抗紫外性能的CeO2薄膜，并采用SEM、XRD、FT-IR、橢圓偏振儀和UV-vis對薄膜和同時制備的粉體進行了表征，研究了Ce(Ⅲ)濃度和尿素加入量對薄膜的影響。結(jié)果表明，當Ce(Ⅲ)濃度和尿素加入量較小時，薄膜光滑且沉積顆粒較小，沉積顆粒是CeO2和Ce(CO3)2O·H2O晶體，且玻璃基底中的Si參與了水熱反應。薄膜致密度和化學組成影響其反射率，隨著Ce(Ⅲ)濃度和尿素加入量增加，由于薄膜厚度和半導體復合的影響，其吸光度和吸收邊波長增大，最佳的Ce(Ⅲ)濃度是0.008 mol/L，尿素加入量是0.06 g。

    Abstract:

    The cerium oxide films with high refractive index and good UV irradiation shielding performance were synthesized on the glass substrates by a hydrothermal method using Ce(NO3)3·6H2O and CO(NH2)2 as raw materials. The films and the powders prepared at the same time were characterized by SEM, XRD, FT-IR, ellipsometer and UV-vis. The influences of original Ce(Ⅲ) concentration and urea dosage on cerium oxide films were researched. The results show that the films are smooth and the particles are small at low Ce(Ⅲ) concentration and urea dose. The sediments are cerium oxide and Ce(CO3)2O·H2O crystal, and silicon of substrate is involved in hydrothermal reaction. Meanwhile, the film refractive indexes are affected by film compact and chemical composition. Both of absorbance and absorption wavelength edge become big with increasing of Ce(Ⅲ) concentration and urea dose, and the main influence factors are the film thickness and composite semiconductors. The optimal Ce(Ⅲ) concentration is 0.008 mol/L, and the optimal urea dosage is 0.06 g.

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劉連利,劉玉靜,孫 彤,徐姝穎,王莉麗,周 麗. Hydrothermal Synthesis and UV Irradiation Shielding Per- formances of Nanometer Cerium (IV) Oxide Thin Films[J].稀有金屬材料與工程,2015,44(1):7~11.[Liu Lianli, Liu Yujing, Sun Tong, Xu Shuying, Wang Lili, Zhou Li. Hydrothermal Synthesis and UV Irradiation Shielding Per- formances of Nanometer Cerium (IV) Oxide Thin Films[J]. Rare Metal Materials and Engineering,2015,44(1):7~11.]
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  • 收稿日期:2014-03-25
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  • 在線發(fā)布日期: 2015-05-22
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