Excellent ammonia sensing performance of gas sensor based on graphene/titanium dioxide hybrid with improved morphology

Excellent ammonia sensing performance of gas sensor based on graphene/titanium dioxide hybrid with improved morphology
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基于具有改进形貌的石墨烯/二氧化钛杂化物的气体传感器具有优异的氨传感性能

DOI:
10.1016/j.apsusc.2017.03.251
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发表时间:
2017-10
影响因子:
6.7
通讯作者:
Jiang Yadong
Jiang Yadong
中科院分区:
材料科学1区
文献类型:
--
作者:
Ye Zongbiao;Tai Huiling;Guo Rui;Yuan Zhen;Liu Chunhua;Su Yuanjie;Chen Zhi;Jiang Yadong

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采用水热法制备了还原氧化石墨烯(rGO)-二氧化钛(TiO2)杂化材料,并将其用于室温氨检测。X射线衍射(XRD)、紫外-可见光谱(UV-vis)和扫描电镜(SEM)表征表明,rGO-TiO 2杂化材料成功形成。结果还表明,由于合成二氧化钛的引入,石墨烯片的形貌得到了极大的改善,变得多孔和起伏。因此,与裸石墨烯膜传感器相比,基于混合物的传感器显示出优异得多的感测特性。其机理是rGO片与TiO2纳米球之间的协同作用,即TiO2纳米球的支撑作用富集了活性吸附位。
Reduced graphene oxide (rGO)-titanium dioxide (TiO2) hybrid material has been prepared through a facile hydrothermal method for ammonia detection at room temperature. The combined characterizations including X-ray diffraction (XRD), ultraviolet-visible spectroscopy (UV–vis) and scanning electron microscopy (SEM) indicated the successful formation of rGO-TiO2hybrid. It also showed that the morphology of graphene sheets was greatly improved to become porous and undulating due to introduction of synthetic titanium dioxide. Accordingly, the hybrid-based sensor showed much more excellent sensing properties in comparison to that of bare graphene film sensor. The mechanism for the improvement could be ascribed to the synergetic effect between rGO sheets and TiO2nanospheres, specifically, the enrichment of active adsorption sites on account of the supporting function of TiO2nanospheres.
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期刊: Physical Review B
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