SYNTHESES OF NEW PHOTOSENSITIZED GRAPHITE INTERCALATION COMPOUNDS AND THEIR APPLICATION TO FIXATION OF CARBON DIOXIDE

主要研究结果如下：(1)合成了CuCl2-GICS石墨层间化合物(CuCl2-GICS)，发现其在0.25M的K2SO4水溶液中具有光敏性。(2)成功地将CuCl2-GICS用于光催化制氢。在甲醇水溶液中，CuCl2-GICs与金属铜粉组成的悬浮液在光照射下产生氢气。(3)采用旋转环盘电极法和n-TiO2光化学二极管对二氧化碳还原的机理进行了研究。(4)碳包覆TiO2光催化降解有机物质的研究在含染料溶液的光催化脱色中得到了应用。

The results of this research are summarized as follows.(1) Graphite intercalation compounds with copper chloride (CuCl_2-GICs) were synthesized and found to be photosensitized in a K_2SO_4 aqueous solution of 0.25M.(2) The CuCl_2-GICS were successfully applied to photocatalytic hydrogen production. The hydrogen production resulted from photoillumination to a suspension of CuCl_2-GICs with metallic copper powder in an aqueous methanol solution.(3) Mechanistic investigations in a reduction of carbon dioxide were made electrochemically by a rotating ring-disk electrode method and photoelectrochemically by using a product-separable photochemical diode composed of n-TiO_2/Ti.(4) The usefulness of carbon-coated TiO_2 in photocatalytic decomposition of organic materials was been demonstrated in a photocatalytic decolorization of a dye-containing solution.