| Summary: | 碩士 === 中原大學 === 化學研究所 === 104 === This study mainly investigated the relationship between metal effect and carbonization temperature during the carbonization of metal organic frameworks. The metal organic frameworks chosen were MIL-100(Fe)(Al), MIL-53(Fe)(Al), MIL-88B(Fe), UiO-66(Zr), and ZIF-67(Co). Raman spectroscopy was employed to explore the relationship between carbonization temperature and the ID/IG intensity ratio of the metal organic framework after high-temperature carbonization. We conducted carbonization research with the aim of studying the metal organic frameworks of different metals. As a result, it was found that the G'' band only appeared in iron (Fe) and cobalt (Co), and was not present in the remaining non-iron and non-cobalt metal organic frameworks. This was because iron and cobalt played the role of catalyst in the carbonization process, wherein carbon would be absorbed onto the iron or cobalt, leading to a regular arrangement of the carbon layer. The G'' band represented the uniformity of carbon layer arrangement. The more regular the arrangement, the greater the IG'' of the G'' band, and vice versa. Hence, on further investigating the relationship between the G'' band and carbonization temperature, we found that the IG'' of the G'' band would increase when the carbonization temperature was increased. In other words, IG''/IG would show an upward trend because of the increase in temperature. This is attributed to the increase in the crystallinity of carbon and more regular arrangement of the carbon layer. To further demonstrate the metal effect, we uniformly mixed terephthalic acid with ferric nitrate, aluminum nitrate, chromium nitrate, and cobalt nitrate individually and conducted high temperature carbonization, which revealed that the G'' band only appeared in the mixtures containing ferric nitrate and cobalt nitrate. We also used X-ray powder diffraction and Raman spectroscopy to detect the stacked differences between C-MIL-100(Fe) and C-MIL-100(Al) before and after HF treatment. We will discuss the above experimental results in detail.
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