MOFs-Derived Porous NiFe<sub>2</sub>O<sub>4</sub> 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<sub>2</sub>O<sub>4</sub> nano-octahedrons were calcinated from NiFe-bimetallic metal-organic framework (MO...
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MDPI AG
2019-07-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/9/8/1059 |
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| author | Yanlin Zhang Chaowei Jia Qiuyue Wang Quan Kong Gang Chen Hongtao Guan Chengjun Dong |
| author_facet | Yanlin Zhang Chaowei Jia Qiuyue Wang Quan Kong Gang Chen Hongtao Guan Chengjun Dong |
| author_sort | Yanlin Zhang |
| collection | DOAJ |
| 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<sub>2</sub>O<sub>4</sub> 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<sub>2</sub>O<sub>4</sub> nanoparticles (30 nm) into NiFe<sub>2</sub>O<sub>4</sub> porous nano-octahedrons with hollow interiors. The NiFe<sub>2</sub>O<sub>4</sub> 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<sub>2</sub>O<sub>4</sub> nanoparticles. |
| first_indexed | 2024-12-11T18:38:02Z |
| format | Article |
| id | doaj.art-8e1d2acf978e4797a29d830d6a1d1880 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-12-11T18:38:02Z |
| publishDate | 2019-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-8e1d2acf978e4797a29d830d6a1d18802022-12-22T00:54:42ZengMDPI AGNanomaterials2079-49912019-07-0198105910.3390/nano9081059nano9081059MOFs-Derived Porous NiFe<sub>2</sub>O<sub>4</sub> Nano-Octahedrons with Hollow Interiors for an Excellent Toluene Gas SensorYanlin Zhang0Chaowei Jia1Qiuyue Wang2Quan Kong3Gang Chen4Hongtao Guan5Chengjun Dong6School of Materials Science and Engineering, Yunnan University, Kunming 650091, ChinaSchool of Materials Science and Engineering, Yunnan University, Kunming 650091, ChinaSchool of Materials Science and Engineering, Yunnan University, Kunming 650091, ChinaSchool of Materials Science and Engineering, Yunnan University, Kunming 650091, ChinaSchool of Materials Science and Engineering, Yunnan University, Kunming 650091, ChinaSchool of Materials Science and Engineering, Yunnan University, Kunming 650091, ChinaSchool of Materials Science and Engineering, Yunnan University, Kunming 650091, ChinaToluene 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<sub>2</sub>O<sub>4</sub> 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<sub>2</sub>O<sub>4</sub> nanoparticles (30 nm) into NiFe<sub>2</sub>O<sub>4</sub> porous nano-octahedrons with hollow interiors. The NiFe<sub>2</sub>O<sub>4</sub> 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<sub>2</sub>O<sub>4</sub> nanoparticles.https://www.mdpi.com/2079-4991/9/8/1059MOFsNiFe<sub>2</sub>O<sub>4</sub>octahedrongas sensortoluene |
| spellingShingle | Yanlin Zhang Chaowei Jia Qiuyue Wang Quan Kong Gang Chen Hongtao Guan Chengjun Dong MOFs-Derived Porous NiFe<sub>2</sub>O<sub>4</sub> Nano-Octahedrons with Hollow Interiors for an Excellent Toluene Gas Sensor Nanomaterials MOFs NiFe<sub>2</sub>O<sub>4</sub> octahedron gas sensor toluene |
| title | MOFs-Derived Porous NiFe<sub>2</sub>O<sub>4</sub> Nano-Octahedrons with Hollow Interiors for an Excellent Toluene Gas Sensor |
| title_full | MOFs-Derived Porous NiFe<sub>2</sub>O<sub>4</sub> Nano-Octahedrons with Hollow Interiors for an Excellent Toluene Gas Sensor |
| title_fullStr | MOFs-Derived Porous NiFe<sub>2</sub>O<sub>4</sub> Nano-Octahedrons with Hollow Interiors for an Excellent Toluene Gas Sensor |
| title_full_unstemmed | MOFs-Derived Porous NiFe<sub>2</sub>O<sub>4</sub> Nano-Octahedrons with Hollow Interiors for an Excellent Toluene Gas Sensor |
| title_short | MOFs-Derived Porous NiFe<sub>2</sub>O<sub>4</sub> Nano-Octahedrons with Hollow Interiors for an Excellent Toluene Gas Sensor |
| title_sort | mofs derived porous nife sub 2 sub o sub 4 sub nano octahedrons with hollow interiors for an excellent toluene gas sensor |
| topic | MOFs NiFe<sub>2</sub>O<sub>4</sub> octahedron gas sensor toluene |
| url | https://www.mdpi.com/2079-4991/9/8/1059 |
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