Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Chem Asian J. 2013 Jan;8(1):218-24. doi: 10.1002/asia.201200781. Epub 2012 Oct 22.
Poly(triazine imide) was synthesized with incorporation of Li(+) and Cl(-) ions (PTI/Li(+)Cl(-)) to form a carbon nitride derivative. The synthesis of this material by the temperature-induced condensation of dicyandiamide was examined both in a eutectic mixture of LiCl-KCl and without KCl. On the basis of X-ray diffraction measurements of the synthesized materials, we suggest that a stoichiometric amount of LiCl is necessary to obtain the PTI/Li(+)Cl(-) phase without requiring the presence of KCl at 873 K. PTI/Li(+)Cl(-) with modification by either Pt or CoO(x) as cocatalyst photocatalytically produced H(2) or O(2), respectively, from water. The production of H(2) or O(2) from water indicates that the valence and conduction bands of PTI/Li(+)Cl(-) were properly located to achieve overall water splitting. The treatment of PTI/Li(+)Cl(-) with Pt(NH(3))(4) cations enabled the deposition of Pt through ion exchange, demonstrating photocatalytic activity for H(2) evolution, while treatment with PtCl(6) anions resulted in no Pt deposition. This was most likely because of the preferential exchange between Li(+) ions and Pt(NH(3))(4) cations.
聚（三嗪亚胺）被合成并掺入锂离子和氯离子（PTI/Li(+)Cl(-)）以形成一种碳氮化物衍生物。这种材料是通过双氰胺的温度诱导缩合合成的，在 LiCl-KCl 共晶混合物中和没有 KCl 的情况下都进行了研究。基于对合成材料的 X 射线衍射测量，我们建议在 873 K 下，获得 PTI/Li(+)Cl(-) 相需要有适量的 LiCl，而不需要 KCl 的存在。PTI/Li(+)Cl(-) 通过添加 Pt 或 CoO(x) 作为共催化剂进行改性，分别光催化地从水中产生 H(2)或 O(2)。从水中产生 H(2)或 O(2)表明 PTI/Li(+)Cl(-) 的价带和导带被适当地定位以实现整体水分解。PTI/Li(+)Cl(-) 与 Pt(NH(3))(4)阳离子的处理通过离子交换使 Pt 沉积，表现出光催化析氢活性，而用 PtCl(6)阴离子处理则没有 Pt 沉积。这很可能是因为锂离子和 Pt(NH(3))(4)阳离子之间的优先交换。
