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我们成功的制备出了含不同成分尿素的夹层化合物(NH2CONH2)xTiS2,并研究了它们在低温(5～310K)下的热、电输运性质.夹层后晶格常数、热、电输运行为的变化也证实了尿素分子成功的夹层到TiS2的范德华尔斯层间.研究结果表明:尿素分子的夹层成功的降低了材料的热导率,特别是在浓度为12.5mmol/L尿素的苯溶液中合成的样品的热导率大约1.5Wm-1 K-1(仅为纯TiS2的50%),而且尿素分子的夹层使得材料在低温下的导电行为从金属性转变为半导体性.
We successfully prepared xTiS2 (NH2CONH2) xTiS2with different composition of urea and studied its thermal and electric transport properties at low temperature (5 ~ 310K) .The lattice constant, thermal and electrical transport behavior The results also showed that urea molecules successfully intercalated into van der Waals interlayer of TiS2.The results showed that the sandwich of urea molecules successfully reduced the thermal conductivity of the material, especially in the benzene solution of 12.5 mmol / L urea The thermal conductivity of the synthesized samples was about 1.5Wm-1K-1 (only 50% of pure TiS2), and the interlayer of urea molecules made the conductivity of the material change from metallic to semiconducting at low temperature.