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首页> 外文期刊>RSC Advances >Greatly enhanced H2S sensitivity using defect-rich titanium oxide films
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Greatly enhanced H2S sensitivity using defect-rich titanium oxide films

机译：使用富含缺陷的二氧化钛薄膜大大提高了H2S敏感性

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Defect-rich titanium oxide films were prepared using the laser ablation technique. The target pellet used for the ablation was rutile phase pure stoichiometric TiO2. X-ray photoelectron and synchrotron soft X-ray absorption spectroscopy measurements have revealed the chemical composition of the films. Using 200 mJ of laser energy, the stoichiometric transfer of TiO2 from the target to the substrate was achieved. The films prepared using 500 mJ of laser energy were observed to be highly defect-rich with a composition of Ti/TiOx. The gas sensing characteristics of these films were tested. The unique defect-richness of the films favours the formation of excessive overlayers of chemisorbed oxygen on the surface of the films in large proportions as compared to the lattice oxygen, making the films rich in titanium forming Ti-Ti electronic bonds, producing a great enhancement in the sensitivity toward highly toxic H2S gas.
机译：使用激光烧蚀技术制备了富缺陷的二氧化钛膜。用于消融的目标丸粒是金红石相纯化学计量的TiO2。 X射线光电子和同步加速器软X射线吸收光谱法测量揭示了薄膜的化学成分。使用200 mJ的激光能量，实现了TiO2从靶材到衬底的化学计量转移。观察到使用500 mJ激光能量制备的薄膜具有高缺陷含量，且具有Ti / TiOx成分。测试了这些薄膜的气敏特性。薄膜具有独特的缺陷丰富性，与晶格氧相比，有利于在薄膜表面形成大量化学吸附氧的过量覆盖层，从而使薄膜富含钛，形成Ti-Ti电子键，从而大大增强了化学吸附力。对高毒性H2S气体的敏感性。

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