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Enhanced NH3-Sensitivity of Reduced Graphene Oxide Modified by Tetra-α-Iso-Pentyloxymetallophthalocyanine Derivatives.

Li X, Wang B, Wang X, Zhou X, Chen Z, He C, Yu Z, Wu Y - Nanoscale Res Lett (2015)

Bottom Line: Three kinds of novel hybrid materials were prepared by noncovalent functionalized reduced graphene oxide (rGO) with tetra-α-iso-pentyloxyphthalocyanine copper (CuPc), tetra-α-iso-pentyloxyphthalocyanine nickel (NiPc) and tetra-α-iso-pentyloxyphthalocyanine lead (PbPc) and characterized by Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible spectroscopy (UV-vis), Raman spectra, X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), and atomic force microscope (AFM).The as-synthesized MPc/rGO hybrids show excellent NH3 gas-sensing performance with high response value and fast recovery time compared with bare rGO.The enhancement of the sensing response is mainly attributed to the synergism of gas adsorption of MPc to NH3 gas and conducting network of rGO with greater electron transfer efficiency.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, China. wangbin@hlju.edu.cn.

ABSTRACT
Three kinds of novel hybrid materials were prepared by noncovalent functionalized reduced graphene oxide (rGO) with tetra-α-iso-pentyloxyphthalocyanine copper (CuPc), tetra-α-iso-pentyloxyphthalocyanine nickel (NiPc) and tetra-α-iso-pentyloxyphthalocyanine lead (PbPc) and characterized by Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible spectroscopy (UV-vis), Raman spectra, X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), and atomic force microscope (AFM). The as-synthesized MPc/rGO hybrids show excellent NH3 gas-sensing performance with high response value and fast recovery time compared with bare rGO. The enhancement of the sensing response is mainly attributed to the synergism of gas adsorption of MPc to NH3 gas and conducting network of rGO with greater electron transfer efficiency. Strategies for combining the good properties of rGO and MPc derivatives will open new opportunities for preparing and designing highly efficient rGO chemiresistive gas-sensing hybrid materials for potential applications in gas sensor field.

No MeSH data available.


Related in: MedlinePlus

SEM images of a CuPc/rGO, b NiPc/rGO, and c PbPc/rGO hybrids bridged electrode, response, and recovery curves of d CuPc/rGO, e NiPc/rGO, and f PbPc/rGO hybrid sensors in different concentrations of NH3 at room temperature and g reversibility of the response of (1) PbPc/rGO hybrid sensor to 0.75 ppm NH3 gas, (2) NiPc/rGO hybrid sensor to 50 ppm NH3 gas, and (3) CuPc/rGO hybrid sensors to 100 ppm NH3 gas
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Fig7: SEM images of a CuPc/rGO, b NiPc/rGO, and c PbPc/rGO hybrids bridged electrode, response, and recovery curves of d CuPc/rGO, e NiPc/rGO, and f PbPc/rGO hybrid sensors in different concentrations of NH3 at room temperature and g reversibility of the response of (1) PbPc/rGO hybrid sensor to 0.75 ppm NH3 gas, (2) NiPc/rGO hybrid sensor to 50 ppm NH3 gas, and (3) CuPc/rGO hybrid sensors to 100 ppm NH3 gas

Mentions: The NH3 gas-sensing performance of MPc/rGO hybrid sensors were evaluated and compared with sensors made of pure rGO sensor. Sensors were fabricated using a drop casting technique on interdigitated electrode surface. Figure 7a–c shows assembled MPc/rGO hybrids bridging the electrode gaps and the connecting electrodes were formed. The resistance value of 4–7 kΩ was obtained, which suggested that a perfect circuit of the sensing device had been achieved, which is higher than pure rGO sensor (about 2.8 kΩ). Interestingly, the resistance of MPc sensors is remarkably decreased from about 3000 MΩ [18] to 4–7 kΩ, indicating the improved electrical conductivity of MPc/rGO hybrids. This maybe ascribed to the large MPc/rGO hybrids conjugated π system and electron transfer interactions from MPc to rGO sheets, which results the increase of the electrical conductivity of MPc and decrease of the electrical conductivity of rGO.Fig. 7


Enhanced NH3-Sensitivity of Reduced Graphene Oxide Modified by Tetra-α-Iso-Pentyloxymetallophthalocyanine Derivatives.

Li X, Wang B, Wang X, Zhou X, Chen Z, He C, Yu Z, Wu Y - Nanoscale Res Lett (2015)

SEM images of a CuPc/rGO, b NiPc/rGO, and c PbPc/rGO hybrids bridged electrode, response, and recovery curves of d CuPc/rGO, e NiPc/rGO, and f PbPc/rGO hybrid sensors in different concentrations of NH3 at room temperature and g reversibility of the response of (1) PbPc/rGO hybrid sensor to 0.75 ppm NH3 gas, (2) NiPc/rGO hybrid sensor to 50 ppm NH3 gas, and (3) CuPc/rGO hybrid sensors to 100 ppm NH3 gas
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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Fig7: SEM images of a CuPc/rGO, b NiPc/rGO, and c PbPc/rGO hybrids bridged electrode, response, and recovery curves of d CuPc/rGO, e NiPc/rGO, and f PbPc/rGO hybrid sensors in different concentrations of NH3 at room temperature and g reversibility of the response of (1) PbPc/rGO hybrid sensor to 0.75 ppm NH3 gas, (2) NiPc/rGO hybrid sensor to 50 ppm NH3 gas, and (3) CuPc/rGO hybrid sensors to 100 ppm NH3 gas
Mentions: The NH3 gas-sensing performance of MPc/rGO hybrid sensors were evaluated and compared with sensors made of pure rGO sensor. Sensors were fabricated using a drop casting technique on interdigitated electrode surface. Figure 7a–c shows assembled MPc/rGO hybrids bridging the electrode gaps and the connecting electrodes were formed. The resistance value of 4–7 kΩ was obtained, which suggested that a perfect circuit of the sensing device had been achieved, which is higher than pure rGO sensor (about 2.8 kΩ). Interestingly, the resistance of MPc sensors is remarkably decreased from about 3000 MΩ [18] to 4–7 kΩ, indicating the improved electrical conductivity of MPc/rGO hybrids. This maybe ascribed to the large MPc/rGO hybrids conjugated π system and electron transfer interactions from MPc to rGO sheets, which results the increase of the electrical conductivity of MPc and decrease of the electrical conductivity of rGO.Fig. 7

Bottom Line: Three kinds of novel hybrid materials were prepared by noncovalent functionalized reduced graphene oxide (rGO) with tetra-α-iso-pentyloxyphthalocyanine copper (CuPc), tetra-α-iso-pentyloxyphthalocyanine nickel (NiPc) and tetra-α-iso-pentyloxyphthalocyanine lead (PbPc) and characterized by Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible spectroscopy (UV-vis), Raman spectra, X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), and atomic force microscope (AFM).The as-synthesized MPc/rGO hybrids show excellent NH3 gas-sensing performance with high response value and fast recovery time compared with bare rGO.The enhancement of the sensing response is mainly attributed to the synergism of gas adsorption of MPc to NH3 gas and conducting network of rGO with greater electron transfer efficiency.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, China. wangbin@hlju.edu.cn.

ABSTRACT
Three kinds of novel hybrid materials were prepared by noncovalent functionalized reduced graphene oxide (rGO) with tetra-α-iso-pentyloxyphthalocyanine copper (CuPc), tetra-α-iso-pentyloxyphthalocyanine nickel (NiPc) and tetra-α-iso-pentyloxyphthalocyanine lead (PbPc) and characterized by Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible spectroscopy (UV-vis), Raman spectra, X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), and atomic force microscope (AFM). The as-synthesized MPc/rGO hybrids show excellent NH3 gas-sensing performance with high response value and fast recovery time compared with bare rGO. The enhancement of the sensing response is mainly attributed to the synergism of gas adsorption of MPc to NH3 gas and conducting network of rGO with greater electron transfer efficiency. Strategies for combining the good properties of rGO and MPc derivatives will open new opportunities for preparing and designing highly efficient rGO chemiresistive gas-sensing hybrid materials for potential applications in gas sensor field.

No MeSH data available.


Related in: MedlinePlus