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MOFs-derived porous NiFeO nano-octahedrons with hollow interiors for an excellent toluene gas sensor

Nanomaterials, ISSN: 2079-4991, Vol: 9, Issue: 8
2019
  • 35
    Citations
  • 0
    Usage
  • 32
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    35
    • Citation Indexes
      35
  • Captures
    32
  • Mentions
    1
    • References
      1
      • Wikipedia
        1

Article Description

Toluene is extensively used in many industrial products, which needs to be effectively detected by sensitive gas sensors even at low-ppm-level concentrations. Here, NiFe O nano-octahedrons were calcinated from NiFe-bimetallic metal-organic framework (MOFs) octahedrons synthesized by a facile refluxing method. The co-existence of p-Phthalic acid (PTA) and 3,3-diaminobenzidine (DAB) promotes the formation of smooth NiFe-bimetallic MOFs octahedrons. After subsequent thermal treatment, a big weight loss (about 85%) transformed NiFe O nanoparticles (30 nm) into NiFe O porous nano-octahedrons with hollow interiors. The NiFe O nano-octahedron based sensor exhibited excellent gas sensing properties for toluene with a nice stability, fast response, and recovery time (25 s/40 s to 100 ppm toluene), and a lower detection limitation (1 ppm) at 260 C. The excellent toluene-sensing properties can not only be derived from the hollow interiors combined with porous nano-octahedrons to favor the diffusion of gas molecules, but also from the efficient catalytic activity of NiFe O nanoparticles.

Bibliographic Details

Zhang, Yanlin; Jia, Chaowei; Wang, Qiuyue; Kong, Quan; Chen, Gang; Guan, Hongtao; Dong, Chengjun

MDPI AG

Chemical Engineering; Materials Science

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