Preparation of Cu-doped MF aerogels by γ-ray irradiation induced reduction method
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摘要: 采用射线辐射还原法，在不同总吸收剂量条件下制备了金属Cu掺杂三聚氰胺-甲醛（MF）有机气凝胶复合材料。利用X-射线衍射仪（XRD）、电感耦合等离子体吸收光谱（ICP-AES）仪和扫描电子显微镜，测试证实了辐射还原法能成功地在MF气凝胶中还原出金属Cu。扫描电子显微镜(SEM)图谱表明在100 kGy和200 kGy的总吸收剂量下，在MF气凝胶中还原的金属Cu粒子的粒径较小，不会形成金属团聚区，而在较高的总吸收剂量下（大于200 kGy），在MF气凝胶中还原的Cu会形成金属团聚区。N2吸附测试表明，还原的金属Cu会堵塞MF气凝胶的一部分微孔和一部分介孔，从而使样品的比表面积和吸附量降低。随着总吸收剂量不断增加，经辐照后样品中金属Cu的含量也不断增加，同时还会影响还原出金属Cu的分布和形貌。Abstract: Cu-doped MF aerogels were successfully synthesized by -ray irradiation induced reduction method with different total irradiation doses, which has been confirmed by XRD, ICP-AES and SEM-EDS. The SEM graphs indicate that the reduction of Cu particles in the MF aerogels is small, and they do not reunite in 100 kGy and 200 kGy total irradiation doses. While in higher total irradiation dose (larger than 200 kGy), the reduced Cu will form the metal reunion area in the MF aerogels. The nitrogen adsorption data analysis shows that the specific surface area and the absorption capacity of MF aerogels decrease after Cu doping, which means that Cu particles fill part of the mesopore and micropore of MF aerogels. The content of Cu in the MF aerogels after irradiation is increasing with a increasing total irradiation dose. Besides, at the same irradiation dose rate, different total irradiation doses will affect the contents and morphology of Cu in MF aerogels.
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Key words:
- MF aerogels /
- Cu-doped /
- γ-ray irradiation induced reduction method
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