MOFs-Derived Porous NiFe 2 O 4 Nano-Octahedrons with Hollow Interiors for an Excellent Toluene Gas Sensor
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 refluxi...
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| Veröffentlicht in: | Nanomaterials (Basel, Switzerland) Switzerland), 2019-07, Vol.9 (8) |
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| creator | Zhang, Yanlin Jia, Chaowei Wang, Qiuyue Kong, Quan Chen, Gang Guan, Hongtao Dong, Chengjun |
| 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. |
| format | Article |
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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
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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
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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.</abstract><cop>Switzerland</cop><pmid>31344833</pmid><orcidid>https://orcid.org/0000-0003-3796-843X</orcidid></addata></record> |
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| ispartof | Nanomaterials (Basel, Switzerland), 2019-07, Vol.9 (8) |
| issn | 2079-4991 2079-4991 |
| language | eng |
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| source | DOAJ Directory of Open Access Journals; PubMed Central Open Access; MDPI - Multidisciplinary Digital Publishing Institute; EZB-FREE-00999 freely available EZB journals; PubMed Central |
| title | MOFs-Derived Porous NiFe 2 O 4 Nano-Octahedrons with Hollow Interiors for an Excellent Toluene Gas Sensor |
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