二氧化钛/氧化石墨烯复合材料室温下氨气敏感性能研究

Room temperature NH_3 gas-sensing performance study of TiO_2/GO composite

本文采用水热法制得氧化石墨烯含量不同的TiO_2/氧化石墨烯复合材料,通过用热重、XRD、SEM、Roman等表征手段对其结构、官能团、缺陷、微观形貌、气敏性能进行了研究。结果表明TiO_2/氧化石墨烯复合材料中二氧化钛可以均匀的分布在氧化石墨烯层间,且随着氧化石墨烯用量的增加,二氧化钛分布的密度减小。通过气敏测试表明复合材料的导电性表现为n型半导体。TiO_2/氧化石墨烯纳米复合材料既可以在室温下工作,又具有较强的附着力和优良的气敏性能。其中样品TIGO-120具备最短的响应时间。

In this paper, hydrothermal method was used prepare graphite oxide composite material. Raman, SEM, XRD, TGA and other characterizations were used to studied structure, functional group, defects, morphology and gas sensing properties.The results showed that TiO_2/GO composite titanium dioxide may be evenly distributed between the graphene oxide layer and titanium dioxide distribution density decreases with increasing the amount of graphene oxide. It showed n-type conductive semiconductor. TiO_2/GO nanocomposites can either work at room temperature, but also has strong adhesion and excellent gas sensing performance. Wherein a sample of the best sensitivity TIGO-120 sample the shortest response time.