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以磷酸三乙酯、硝酸铝和正硅酸乙酯为原料 ,通过它们的不完全水解制备了含有有机基团的xAl2 O3 xP2 O5 10 0SiO2 (x =0 .2 5— 3)凝胶 .在空气中在 40 0℃或 45 0℃或在氮气中从 30 0到 70 0℃对凝胶进行热处理 ,使凝胶中的有机基团炭化 ,从而得到含有碳纳米颗粒的xAl2 O3 xP2 O5 10 0SiO2 (x =0 2 5— 2 )凝胶玻璃 .利用吸收光谱和TEM对含有碳纳米颗粒的凝胶玻璃进行了表征 ,结果发现随着碳纳米颗粒尺寸的减小吸收边向高能边移动 ,这种现象是由碳纳米颗粒中电子和空穴的量子限制效应引起的 .电子衍射表明凝胶玻璃中的纳米碳为非晶碳 .
Starting from triethyl phosphate, aluminum nitrate and tetraethyl orthosilicate, xAl2 O3 xP2 O5 10 O SiO2 (x = 0.52-3) gel containing organic groups were prepared by their incomplete hydrolysis. The gel is subjected to a heat treatment at 40 0 ° C or 45 0 ° C or from 30 0 to 70 0 ° C in a nitrogen atmosphere to carbonize the organic groups in the gel to thereby obtain a xAl 2 O 3 xP 2 O 5 10 O SiO 2 x = 0 2 5- 2) Gel Glass. The glass containing carbon nanoparticles was characterized by absorption spectroscopy and TEM, and as a result, it was found that as the size of the carbon nanoparticles decreased, absorption moved toward high energy side, The phenomenon is caused by the quantum confinement effect of electrons and holes in carbon nano-particles, which shows that the nano-carbon in the gel glass is amorphous carbon.