碳化三聚氰胺基Melem寡聚物第一次被成功製備，其他三聚氰胺基氮化碳衍生物如melon、碳化melon、Melem寡聚物等也成功製備做為比較。XRD，UV-Vis，固態NMR和光降解等分析分別用來探討上述材料之結晶性、能隙、鍵結環境、鏈長及光催化性質等。
從XRD和UVV-Vis中可得知碳化三聚氰胺基Melem具有低結晶性及更寬的吸收範圍，有利於光觸媒應用。在光降解實驗中，兩個寡聚物 (Melem寡聚物及碳化Melem寡聚物)比另兩個聚合物(melon及碳化melon)有顯著的光催化效應增益效果。原因來自於寡聚物比聚合物擁有更多的活性點(鏈長較短)。另外，碳化之後的三聚氰胺基氮化碳衍生物也有光催化效應增益效果。其原因來自於碳化之後更小的能隙和更廣的吸收光譜。尿素基Melem寡聚物也第一次被成功製備，其光催化效應比三聚氰胺基Melem寡聚物更為顯著。原因來自於尿素基氮化碳衍生物擁有更大的比表面積參與光催化反應。但與碳化方法比較下，其效率仍略低於碳化三聚氰胺基Melem寡聚物，藉此指出碳化方法仍有更大的光觸媒增益效果。

Carbon functionalized melamine based melem oligomer was fabricated in the current study for the first time. Other melamine based carbon nitride derivatives, such as melem oligomer, melon, and carbon functionalized melon, were also successfully prepared for comparison. XRD, UV-Vis, solid NMR, and photodegradation characterizations were used to study the crystallinity, optical band gaps, bonding environment, chain length, and photocatalytic properties of all the aforementioned materials.
The XRD and UV-vis results of carbon functionalized melamine based melem oligomer showed low crystallinity and strong absorption at long visible wavelength regime, which were promising for photocatalysis. In the photocatalysis study, both melem oligomer based materials showed much superior photocatalytic properties to melon based materials because more active sites were generated for melem oligomer based materials (shorter chain length). Carbon functionalized materials also showed enhanced photocatalytic properties, which resulted from a wide light absorption range due to small band gaps. Carbon functionalized melem oligomer degraded approximately four times higher of methylene blue, compared with melon. In addition, urea based melem oligomer was also fabricated for the first time. It also showed more enhanced photocatalytic properties, compared with that of melamine based melem oligomer, because of larger surface area. However, its efficiency was still slightly worse than that of carbon functionalized melamine based melem oligomer, indicating that the carbon functionalized strategy is superior to the urea based strategy.

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