W-doped nanoporous TiO2 for high performances sensing material toward acetone gas

IF 1.4 Q4 NANOSCIENCE & NANOTECHNOLOGY

Journal of Nanostructures Pub Date : 2020-01-01 DOI:10.22052/JNS.2020.01.016

Lihong Wang, Xinxin Xing, N. Chen, Rongjun Zhao, Zidong Wang, Tong Zou, Wang Zhezhe, Yude Wang

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引用次数: 3

Abstract

W-doped TiO2 with nanoporous structure was synthesized by a one-step low temperature hydrothermal method using TiOSO4 and (NH4)6H2W12O40•xH2O as titanium and tungsten sources. Structure, morphology, specific surface area and chemical state of samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). W-doped nanoporous TiO2 samples were used as sensing materials of indirect-heating sensors and their gas-sensing performances were studied to detect acetone. The experimental results show that 7.5% W-doped nanoporous TiO2 can adsorb more oxygen molecules on the surface and provide large amount of active reaction sites on interface to profit reaction between material and gas molecules. The gas sensor based on 7.5% W-doped nanoporous TiO2 exhibits good gas-sensing performances, including high gas response value, shortened response/recovery time and good reproducibility, which make it a promising candidate in acetone detection. Apart from these, the mechanism related to the advanced properties was also investigated and presented.

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w掺杂纳米多孔TiO2作为丙酮气体的高性能传感材料

以TiOSO4和(NH4)6H2W12O40•xH2O为钛源和钨源，采用一步低温水热法制备了具有纳米孔结构的w掺杂TiO2。采用x射线衍射(XRD)、透射电子显微镜(TEM)和x射线光电子能谱(XPS)表征了样品的结构、形貌、比表面积和化学状态。以w掺杂纳米多孔TiO2样品作为间接加热传感器的传感材料，研究了其检测丙酮的气敏性能。实验结果表明，7.5% w掺杂的纳米多孔TiO2可以吸附更多的氧分子在表面，并在界面上提供大量的活性反应位点，有利于材料与气体分子之间的反应。基于7.5% w掺杂纳米多孔TiO2的气敏传感器具有气体响应值高、响应/恢复时间短、重现性好等优点，是丙酮检测的理想选择。此外，还研究并提出了与先进性能有关的机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Nanostructures NANOSCIENCE & NANOTECHNOLOGY-

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

7 weeks

期刊介绍： Journal of Nanostructures is a medium for global academics to exchange and disseminate their knowledge as well as the latest discoveries and advances in the science and engineering of nanostructured materials. Topics covered in the journal include, but are not limited to the following: Nanosystems for solar cell, energy, catalytic and environmental applications Quantum dots, nanocrystalline materials, nanoparticles, nanocomposites Characterization of nanostructures and size dependent properties Fullerenes, carbon nanotubes and graphene Self-assembly and molecular organization Super hydrophobic surface and material Synthesis of nanostructured materials Nanobiotechnology and nanomedicine Functionalization of nanostructures Nanomagnetics Nanosensors.