Academic literature on the topic 'Polypyrrole based nanocomposites'
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Journal articles on the topic "Polypyrrole based nanocomposites"
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Ahmad, Sharique, Imran Khan, Ahmad Husain, Anish Khan, and Abdullah M. Asiri. "Electrical Conductivity Based Ammonia Sensing Properties of Polypyrrole/MoS2 Nanocomposite." Polymers 12, no. 12 (December 18, 2020): 3047. http://dx.doi.org/10.3390/polym12123047.
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Polypyrrole (PPy) and Polypyrrole/MoS2 (PPy/MoS2) nanocomposites were successfully prepared, characterized and studied for ammonia sensing properties. The as-prepared PPy and PPy/MoS2 nanocomposites were confirmed by FTIR (Fourier transform infrared spectroscopy), XRD (X-ray diffraction), SEM (scanning electron microscopy) and TEM (transmission electron microscopy) techniques. The ammonia sensing properties of PPy and PPy/MoS2 nanocomposites were studied in terms of change in DC electrical conductivity on exposure to ammonia vapors followed by ambient air at room temperature. It was observed that the incorporation of MoS2 in PPy showed high sensitivity, significant stability and excellent reversibility. The enhanced sensing properties of PPy/MoS2 nanocomposites could be attributed to comparatively high surface area, appropriate sensing channels and efficiently available active sites. The sensing mechanism is explained on the basis of simple acid-base chemistry of polypyrrole.
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Salman, Mohammed Abdilridha, and Salma M. Hassan. "Antibacterial and morphological properties of polypyrrole/silver nanocomposites synthesized by chemical oxidative polymerization." Iraqi Journal of Physics (IJP) 19, no. 48 (February 27, 2021): 33–43. http://dx.doi.org/10.30723/ijp.v19i48.614.
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Polypyrrole/silver (PPy/Ag) nanocomposites was synthesized via a chemical oxidative method. The AFM analysis is performed to study the surface roughness, morphology and size distribution of the PPy particles and PPy-ag nanocomposites. The results indicated that as the concentration of Ag in the nanocomposite increases, the roughness also increases. The size of nanoparticles was also evaluated and found in the range of 15 nm to 125 nm. The PPy/Ag nanocomposites exhibited an effectiveness against Gram-negative Escherichia coli showing an inhibition zone of 4mm and displayed poor efficacy against Gram-positive Staphylococcus aureus. Based on given adequate antibacterial characteristics of PPy/Ag nanocomposites, it can be identified as a promising material in biomedical applications.
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Najjar, Reza, and Samira Nematdoust. "A resistive-type humidity sensor based on polypyrrole and ZnO nanoparticles: hybrid polymers vis-a-vis nanocomposites." RSC Advances 6, no. 113 (2016): 112129–39. http://dx.doi.org/10.1039/c6ra24002j.
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Sultan, Adil, Sharique Ahmad, Tarique Anwer, and Faiz Mohammad. "Binary doped polypyrrole and polypyrrole/boron nitride nanocomposites: preparation, characterization and application in detection of liquefied petroleum gas leaks." RSC Advances 5, no. 128 (2015): 105980–91. http://dx.doi.org/10.1039/c5ra21173e.
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We report an electrical conductivity based rapid response liquefied petroleum gas (LPG) sensor using binary doped polypyrrole and polypyrrole/boron nitride (PPy/BN) nanocomposites as the conductive material.
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Su, Pi-Guey, and Xing-Chen Chai. "Room-Temperature ppb-Level H2S Gas Sensors Based on Ag Nanowire/Hollow PPy Nanotube Nanocomposites." Chemosensors 10, no. 8 (August 2, 2022): 305. http://dx.doi.org/10.3390/chemosensors10080305.
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H2S gas sensors were fabricated using Ag nanowire/hollow polypyrrole nanotube nanocomposite (Ag NW/hollow PPy NT) film for sensing ppb-level H2S gas at room temperature. The morphology, phase composition and crystalline structure of Ag NW/hollow PPy NT nanocomposites were analyzed via scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffractometry (XRD) and Fourier-transform infrared spectroscopy (FTIR). TEM and SEM images revealed that Ag NWs were well dispersed in the hollow PPy NT matrix. IR results showed no interaction between Ag NWs and hollow PPy NTs in the Ag NW/hollow PPy NT nanocomposites. The effect of the amount of added Ag NWs on the response of the Ag NW/hollow PPy NT nanocomposites to the ppb-level H2S gas was investigated. Comparative gas-sensing results revealed that the introduction of Ag NWs onto hollow PPy NTs was effective in promoting the sensor response to H2S gas. More importantly, the Ag NW/hollow PPy NT nanocomposite had a strong response to ppb-level H2S gas at room temperature.
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Guettiche, Djamil, Ahmed Mekki, Tighilt Fatma Zohra, Noureddine Ramdani, and Rachid Mahmoud. "Chemiresistive sensors based on Dodecyl benzene Sulfonic acid doped Polypyrrole and Reduced Graphene Oxide for nitrogen oxides." IOP Conference Series: Materials Science and Engineering 1204, no. 1 (November 1, 2021): 012004. http://dx.doi.org/10.1088/1757-899x/1204/1/012004.
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Abstract A new series of polypyrrole doped with n-dodecylbenzene sulphonic acid/reduced graphene oxide (PPy-DBSA/rGO) nanocomposite was electrodeposited on Indium tin oxide coated Polyethylene terephthalate (ITO/PET) flexible substrate by electrochemical route using the chronoamperometric technique. As-prepared for testing of chemiresistive properties against the detection of nitrogen dioxide (NO2) vapors at room temperature. The sensitivity and reactivity of the composite toward NO2 was evaluated. The recorded morphological and structural data confirmed that the PPy-DBSA/rGO forms a homogeneous nanocomposite. The optimal NO2 sensing properties have been revealed by the PPy-DBSA/rGO in terms of response (43%), response time (30.25 s), the detection limit (1ppm), and reproducibility. Furthermore, Results showed that the doped by sulfonic acid improved both the sensitivity and the reactivity of our produced nanocomposite toward NO2. Due to the strong interactions between the NO2 gas molecules and the rGO was dramatically enhanced the electronic properties of these nanocomposites. These striking characteristics of the newly developed nanocomposites make them very suitable to be used as NO2 gas sensor.
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Baghdadi, Neazar, M. Sh Zoromba, M. H. Abdel-Aziz, A. F. Al-Hossainy, M. Bassyouni, and Numan Salah. "One-Dimensional Nanocomposites Based on Polypyrrole-Carbon Nanotubes and Their Thermoelectric Performance." Polymers 13, no. 2 (January 16, 2021): 278. http://dx.doi.org/10.3390/polym13020278.
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Conducting polymers have attracted significant attention due to their easy fabrication, morphology modification, and their electrical properties. Amongst them, polypyrrole (PPy) has attractive thermoelectric (TE) properties. Engineering of this polymer in one-dimensional (1D) nanostructured form is found to enhance its TE performance. This was achieved in the present work by using multi-walled carbon nanotubes (MWCNTs) as a core template to direct the self-assembly of PPy and also to further enhance its TE performance. The growth of PPy on the sidewalls of MWCNTs was performed in an acidic medium based oxidative in situ polymerization. Various concentrations of MWCNTs within the range 1.1–14.6 wt.% were used to form the MWCNTs/PPy nanocomposites in 1D core-shell structures. The morphology and microstructure results of the produced nanocomposite samples showed that this MWCNTs were successfully coated by thick and thin layers of PPy. At low concentrations of MWCNTs, thick layers of PPy are formed. While at high concentrations thin layers are coated. The formed 1D nanocomposites have enhanced TE performance, particularly those containing higher contents of MWCNTs. The power factor and figure of merit values for the formed 1D nanocomposites recorded around 0.77 µV/mK2 and 1 × 10−3 at room temperature (RT), respectively. This enhancement was attributed to the perfect coating and good interaction between PPy and MWCNT through π–π stacking between the polymer chains and these nanotubes. These results might be useful for developing future TE materials and devices.
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German, Natalija, Almira Ramanaviciene, and Arunas Ramanavicius. "Formation and Electrochemical Evaluation of Polyaniline and Polypyrrole Nanocomposites Based on Glucose Oxidase and Gold Nanostructures." Polymers 12, no. 12 (December 17, 2020): 3026. http://dx.doi.org/10.3390/polym12123026.
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Nanocomposites based on two conducting polymers, polyaniline (PANI) and polypyrrole (Ppy), with embedded glucose oxidase (GOx) and 6 nm size gold nanoparticles (AuNPs(6nm)) or gold-nanoclusters formed from chloroaurate ions (AuCl4−), were synthesized by enzyme-assisted polymerization. Charge (electron) transfer in systems based on PANI/AuNPs(6nm)-GOx, PANI/AuNPs(AuCl4−)-GOx, Ppy/AuNPs(6nm)-GOx and Ppy/AuNPs(AuCl4−)-GOx nanocomposites was investigated. Cyclic voltammetry (CV)-based investigations showed that the reported polymer nanocomposites are able to facilitate electron transfer from enzyme to the graphite rod (GR) electrode. Significantly higher anodic current and well-defined red-ox peaks were observed at a scan rate of 0.10 V s−1. Logarithmic function of anodic current (log Ipa), which was determined by CV-based experiments performed with glucose, was proportional to the logarithmic function of a scan rate (log v) in the range of 0.699–2.48 mV s−1, and it indicates that diffusion-controlled electrochemical processes were limiting the kinetics of the analytical signal. The most efficient nanocomposite structure for the design of the reported glucose biosensor was based on two-day formed Ppy/AuNPs(AuCl4−)-GOx nanocomposites. GR/Ppy/AuNPs(AuCl4−)-GOx was characterized by the linear dependence of the analytical signal on glucose concentration in the range from 0.1 to 0.70 mmol L−1, the sensitivity of 4.31 mA mM cm−2, the limit of detection of 0.10 mmol L−1 and the half-life period of 19 days.
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Zhang, Dawei, Qing Zhang, Xin Gao, and Guangzhe Piao. "A Nanocellulose Polypyrrole Composite Based on Tunicate Cellulose." International Journal of Polymer Science 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/175609.
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The water-dispersed conductive polypyrrole (PPy) was prepared via thein situoxidative chemical polymerization by using ammonium persulfate (APS) as oxidant and tunicate cellulose nanocrystals (T-CNs) as a dopant and template for tuning the morphologies of PPy nanoparticles. Highly flexible paper-like materials of PPy/T-CNs nanocomposites with high electrical conductivity values and good mechanical properties were prepared. The structure of nanocomposites of PPy/T-CNs was investigated by using Fourier transform infrared spectroscopy. Scanning electron microscopy and transmission electron microscopy analyses of the composites revealed that PPy consisted of nanoparticles about 2.5 nm in mean size to form a continuous coating covered on the T-CNs. The diameters of the PPy nanoparticles increased from 10 to 100 nm with the increasing pyrrole amount. Moreover, electrical properties of the obtained PPy/T-CNs films were studied using standard four-probe technique and the electrical conductivity could be as high as 10−3 S/cm.
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Wang, Huan, Pei Qin, Yun-Hui Feng, Hui-Liang Sun, Hui-Xiang Wu, Bo-Kai Liao, Yue-Bin Xi, and Wei Wang. "Polypyrrole Film Deposited-TiO2 Nanorod Arrays for High Performance Ultraviolet Photodetectors." Chemosensors 10, no. 7 (July 13, 2022): 277. http://dx.doi.org/10.3390/chemosensors10070277.
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TiO2-based ultraviolet photodetectors have drawn great attention and are intensively explored. However, the construction of TiO2-based nanocomposites with excellent ultraviolet responses remains challenging. Herein, a TiO2 nanorod array was successfully prepared on fluorine-doped tin oxide (FTO) conductive glass by a one-step hydrothermal method. Then, polypyrrole (PPy)-TiO2 nanorod array composites were designed via subsequent in situ oxidative polymerization. The morphologies, structures, and photocurrent responses of the nanocomposites were systematically investigated. The results demonstrated that polypyrrole-TiO2 exhibited a stronger photocurrent response than pure TiO2 due to the p-n junction formed between n-type TiO2 nanorod arrays and p-type polypyrrole. The PPy-TiO2 composite obtained by deposition three times had the best photoelectric properties, exhibiting good performance with a sensitivity of 41.7 and responsivity of 3.5 × 10−3 A/W. Finally, the mechanism of the photoelectrical response of PPy-TiO2 composites was discussed, guiding the design of high-performance TiO2-based ultraviolet photodetectors.
Dissertations / Theses on the topic "Polypyrrole based nanocomposites"
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Mikhaylov, Sergei. "Synthesis and investigation of nanostructured conducting polymers based nanocomposites for ammonia and amines detection." Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10036/document.
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La thèse est consacrée à la synthèse et à l’étude des propriétés des matériaux hybrides inorganique-organique à base de polyaniline (PANI) et de polypyrrole (PPy) avec des nanoparticules TiO2 (rutile et anatase) et SnO2 applicables à détection l'ammoniac et aux amines. La croissance directe du polymère sur la surface des nanoparticules a permis l’obtention de matériaux nanocomposites avec une structure “core-shell” qui diffère du mélange mécanique simple par une distribution plus uniforme des polymères et une interaction plus forte entre les composants source. L’objet de la recherche est le processus de formation de nanocomposites de polyaniline et de polypyrrole avec des oxydes métalliques. L’objectif de la recherche est de révéler les particularités de la formation et les propriétés des matériaux composites nanostructurés à base de polymères conducteurs et nanoparticules d’oxydes métalliques sensibles à l’ammoniac et aux amines. Les méthodes de recherche incluent le RedOx et la surveillance du pH, FTIR et UV-spectroscopie, SEM, TEM, thermogravimétrie, chromatographie liquide, mesures de conductivité et tests de capteurs. La nouvelle approche d’étude de la cinétique du processus de polymérisation de l'aniline par la surveillance simultané du RedOx et du pH du milieu réactionnel a été proposée. Pour la première fois, on a montré l’influence des acides sulfoniques et des oxydes métalliques sur le procédé de polymérisation de l’aniline et les caractéristiques moléculaires du polymère obtenu. En outre, une corrélation linéaire entre le contenu en nanoparticules et la durée réciproque des stades séparés de la polymérisation a été démontrée. Les nanocomposites “core-shell” formés ont une sensibilité à l’ammoniac et aux amines environ 2 fois supérieure à celle du polymère pur. Les nouveaux matériaux développés peuvent être utilisés dans la fabrication de couches actives des capteurs chimiorésistifsThe thesis is devoted to the synthesis and investigation of properties of inorganic-organic polyaniline (PANI) and polypyrrole (PPy) based hybrid materials with TiO2 (rutile and anatase) and SnO2 nanoparticles applicable for ammonia and amines detection. The direct polymer growth on the surface of nanoparticles allowed obtaining of nanocomposite materials with a “core-shell” structure which differs from simple mechanical mixture by more uniform polymer distribution and stronger interaction between source components.The object of research is the process of formation of polyaniline and polypyrrole nanocomposites with metal oxides. The research goal is to reveal formation peculiarities and properties of nanostructured composite materials based on conducting polymers and metal oxides nanoparticles that are sensitive to ammonia and amines. Research methods include RedOx and pH monitoring, FTIR and UV-spectroscopy, SEM, TEM, thermogravimetry, liquid chromatography, conductivity measurements and sensor tests.The new approach to study kinetics of aniline polymerization process by simultaneous RedOx and pH monitoring of reaction medium was proposed. For the first time the influence of sulfonic acids and metal oxides on the aniline polymerization process and molecular characteristics of the obtained polymer was shown. For the first time a linear correlation between the nanoparticles content and reciprocal duration of separate stages of polymerization was shown. Formed "core-shell" nanocomposites have sensitivity to ammonia and amines of about 2 times higher than the pure polymer. Developed new materials can be used in the manufacturing of chemoresistive sensors' active layers
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Demets, Grégoire Jean-François. ""Desenvolvimento de interfaces eletroquímicas à base de nanocompósitos de poli(Pirrol) e xerogel lamelar de pentóxido de vanádio"." Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/46/46134/tde-26072002-163527/.
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Esta tese apresenta um estudo detalhado das propriedades eletroquímicas dos nanocompósitos de V2O5.nH2O e poli(pirrol) sobre a superfície de eletrodos. Demonstramos aqui que pelo controle de parâmetros de síntese é possível alterar a composição das interfaces eletroquímicas dos eletrodos modificados, fazendo com que o poli(pirrol) esteja por cima, por baixo ou dentro do V2O5 que recobre os eletrodos. Esta diferenciação estrutural tem repercussão nas propriedades eletroquímicas e espectroscópicas dos eletrodos modificados. Desenvolvemos além disto um método para gerar matrizes de V2O5.nH2O, assim como nanocompósitos com poli(pirrol) que possuam anisotropia elétrica tridimensional, propriedade útil em eletrônica. Na última parte do trabalho, poli(pirrol) foi inserido em matrizes de intercalação do tipo BV (V2O5.nH2O estabilizado com esmectita) gerando materiais estáveis em meio aquoso e adequados modificadores de eletrodos, viabilizando a exploração das propriedades dos compósitos de V2O5/poli(pirrol) em água.This thesis focuses on the electrochemical properties of V2O5.nH2O and its poly(pyrrole) nanocomposites over electrodes. We demonstrate that it is possible, by controlling synthetic procedures, to change the composition of the modified electrodes interfaces, leaving poly(pyrrole) over, under or inside the V2O5 films covering the electrodes. This structural differenciation repercutes on the electrochemical and spectroscopic properties of the modified electrodes. We have developed also a method to generate V2O5.nH2O matrices as well as their nanocomposites with poly(pyrrole) showing tridimensional electrical anisotropy, a useful property in electronics. Additionally, poly(pyrrole) has been inserted into BV (smectite stabilized V2O5.nH2O) matrices, generating stable materials in aqueous medium, conveying to this, the properties of V2O5/poly(pyrrole) nanocomposites modified electrodes.
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Gahlout, Pargati. "Synthesis, characterization and evelution of polypyrrole based nanocomposites for elevtromagnetic shielding application." Thesis, 2018. http://localhost:8080/xmlui/handle/12345678/7740.
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Chang, Hao-Hsiang, and 張皓翔. "Supercapacitor based on polypyrrole/graphene nanocomposite." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/64249488654504790266.
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碩士國立中興大學
化學工程學系所
99
A nanocomposite film consisted of graphene oxide (GO) and polypyrrole (PPy) was successfully synthesized by electropolymerization which the GO and PPy were deposited on the gold electrode simultaneously. The GO-PPy could be reduced through electrochemical reduction method to obtain reduced graphene oxide (rGO)-PPy. The morphology of PPy, GO-PPy and rGO-PPy nanocomposite films were characterized via scaning electron microscope (SEM). Under three-electrode electrochemical system, the electrocapacitive ability of rGO-PPy modified electrode was investigated with cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in 1M H2SO4. In comparsion with PPy and GO-PPy, the rGO-PPy had better eletrocapacitive performances in CV and EIS for supercapacitor applications. And the rGO-PPy had a higer specific capacitance of 352 F/g at a current density of 1 A/g discharge current density, which exceeded that of PPy (108F/g) and GO-PPy (289 F/g).
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Lin, Chuan-Sheng, and 林川勝. "Electrochemical sensors based on polypyrrole/graphene nanocomposite." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/88158264171887818706.
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碩士國立中興大學
化學工程學系所
100
A nanocomposite film consisted of graphene oxide (GO) and polypyrrole (PPy) was successfully synthesized by electropolymerization which the GO and PPy were deposited on the ITO electrode simultaneously. The GO-PPy could be reduced through electrochemical reduction method to obtain reduced graphene oxide (rGO)-PPy. The morphology of PPy, GO-PPy and rGO-PPy nanocomposite films were characterized via scaning electron microscope (SEM). The first part is the introduction of electrochemical behavior of ascorbic acid by using rGO-PPy nanocomposite modified ITO electrode with cyclic voltammetry and amperometry. In cyclic voltammetric responses, the enhanced current response and the lower oxidation potential were obvious evidences for the electrocatalytic ability of rGO-PPy toward AA oxidation, which suggested a diffusion-controlled process for the electrochemical reaction. The determination of AA at the rGO-PPy nanocomposite modified ITO electrode with amperometry displayed a high sensitivity of 0.744 A M-1 cm-2 and a low detection limit of 13 μM . The second part is the introduction of electrochemical behavior of uric acid by using rGO-PPy nanocomposite modified ITO electrode with cyclic voltammetry and amperometry. In cyclic voltammetric responses, the enhanced current response and the lower oxidation potential were obvious evidences for the electrocatalytic ability of rGO-PPy toward UA oxidation, which suggested a diffusion-controlled process for the electrochemical reaction. The determination of UA at the rGO-PPy nanocomposite modified ITO electrode with amperometry displayed a high sensitivity of 0.492 A M-1 cm-2 and a low detection limit of 7 μM . In the third part, this study demonstrates that an efficient electrode for electrocatalytic detection of dopamine (DA), can be directly obtained using rGO-PPy nanoparticles onto the surface of ITO.Cyclic voltammetry and amperometry were used to investigate the electrochemical behaviors of DA at the rGO-PPy coated ITO electrode. Compared to a bare ITO electrode, rGO-PPy coated ITO electrode exhibits the abilities to lower the electrooxidation potential and to raise the current responses of DA.The determination of DA at the rGO-PPy nanocomposite modified ITO electrode with amperometry displayed a high sensitivity of 1.264 A M-1 cm-2 and a low detection limit of 3 μM .
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Li, Shih-Ci, and 黎世棊. "Glucose Biosensors Based on Multiwalled Carbon Nanotubes/Nafion/GOD Nanocomposite and Multiwalled Carbon Nanotubes/Polypyrrole/GOD Nanocomposite." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/67374755640206369833.
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碩士國立中興大學
化學工程學系
93
Novel electroanalytical sensing nanobiocomposite materials are reported. Two methods of preparation of the glucose biosensors based on multi-walled carbon nanotubes (MWNTs) are investigated. The first one is prepared by a simple cast deposition on glassy carbon electrodes (GCE) with mixing MWNTs, Nafion, and a glucose oxidase (GOD) in appropriate amounts. The MWNTs are cylindrical with a diameter in the range of 40 – 60 nm and with a length of up to several micrometers and provide electrical conductivity. Nafion acts as a polymer backbone to give stable and homogeneous cast thin films. The resulting biosensing composite material is inexpensive, reliable, and easy to use. The homogeneity of the MWNTs/Nafion/GOD nanobiocomposite films was characterised by atomic force microscopy (AFM). Amperometric transducers fabricated with these materials were characterized electrochemically using amperometry in the presence of hydrogen peroxide and in the presence of glucose. Their linear response to hydrogen peroxide was demonstrated. This glucose biosensor sensitivity was strongly influenced by glucose oxidase concentration within the nanobiocomposite film. The optimized glucose biosensor (2.5 mg/ml GOD) displayed a sensitivity of 330 nA/mM, a linear range up to 2 mM, a detection limit of 4 μM, and a response time of less than 3 s. The another one is prepared by electrochemical technique. A nanobiocomposite film of polypyrrole (PPy), the functionalization of multi-walled carbon nanotubes (cMWNTs) and GOD were synthesized by electropolymerization which the PPy, MWNTs and GOD were deposited on the GCE simultaneously. The morphology of PPy/cMWNTs nanocomposite film was characterized by AFM and scanning electron microscope (SEM). The amounts of hydrogen peroxide and the heights of amperometric response of PPy/cMWNTs nanocomposite film vary proportionately. The results indicate that the electroanalytical PPy/cMWNTs/GOD nanobiocomposite film was highly sensitive and suitable for glucose biosensors. Relevant parameters of the film preparation were examined and optimized. The optimized glucose biosensor (1.5 mg/ml GOD) displayed a sensitivity of 95 nA/mM, a linear range up to 4 mM, a detection limit of 106 μM, and a response time of less than 8 s.
Book chapters on the topic "Polypyrrole based nanocomposites"
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Olatunji, M. A., M. U. Khandaker, Y. M. Amin, and H. N. M. Ekramul Mahmud. "Development and Characterization of Polypyrrole-Based Nanocomposite Adsorbent and Its Applications in Removal of Radioactive Materials." In IFMBE Proceedings, 30–35. Singapore: Springer Singapore, 2015. http://dx.doi.org/10.1007/978-981-10-0266-3_7.
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Kausar, Ayesha. "Perspectives on nanocomposite with polypyrrole and nanoparticles." In Conducting Polymer-Based Nanocomposites, 103–28. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-822463-2.00006-3.
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Olatunji, M. A., M. U. Khandaker, M. Ladan, and D. A. Bradley. "Polypyrrole-based nanocomposite adsorbents and its application in removal of radioactive materials." In Polymer-based Nanocomposites for Energy and Environmental Applications, 465–89. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-08-102262-7.00017-9.
Full textConference papers on the topic "Polypyrrole based nanocomposites"
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Sardar, A., and P. S. Gupta. "Polypyrrole based nanocomposites for supercapacitor applications: A review." In 2ND INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC 2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5032355.
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Ugwu, Samson N., and Christopher C. Enweremadu. "Comparative Studies on the Effect of Selected Iron-Based Additives on Anaerobic Digestion of Okra Waste." In ASME 2019 13th International Conference on Energy Sustainability collocated with the ASME 2019 Heat Transfer Summer Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/es2019-3820.
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Abstract Biogas production is an anaerobic waste-to-energy technology, involving waste degradation and stabilization. The sustainable, cheap and clean nature of biogas has led to the unprecedented rise in its use as an alternative energy source. Due to the increased interests, availability of conventional biodegradable organics has shrunk enormously over the years, necessitating the aggressive search for novel energy crops and substrate enhancement options. These novel options ensure feedstock security, optimize conventional biomass feedstocks, improve feedstock degradability and increase in biogas yield. Low biodegradability of most lignocellulosic wastes like okra waste, limits their use as a viable substrate in the anaerobic digestion process. Over the years, several elements, compounds and nanoparticles have been applied to anaerobic digestion systems as supplementary nutrients with a view to enhancing substrate degradation. Such supplements like iron-based additives have gained prominence in anaerobic digestion processes of wastes, owing to their electron donation abilities, promotion of solubilization, hydrolysis, acidification, and hydrogenotrophic methanogenesis. In a bid to enhance substrate degradation, reduce inhibitions, increase both biogas yield and methane content, a comparative study on the influence of four different iron-based additives (nanoscale zero-valent iron (nZVI), Polypyrrole-magnetic nanocomposite (Ppy-Fe3O4), Iron powder (Fe) and Hematite (Fe2O3)) on the entire anaerobic digestion of okra waste was done. Previously determined optimum doses, 20 mg, 20 mg, 750 mg, 750 mg and 0 respectively for nZVI, Ppy-Fe3O4, Fe, Fe2O3 and control were added to the bioreactors containing okra wastes in a 500 mL biomethane potential bioreactors under mesophilic temperature (37°C) for 20 days. The cumulative volumes of the biogas from different reactors were recorded and analyzed. The morphological deformation, structures and analysis of the undigested substrate, digestates of substrate supplemented with iron-based additives and the control were evaluated with scanning electron microscopy (SEM). Artificial neural network (ANN) model and the modified Gompertz model were validated with the experimental data. The ANN model showed better goodness of fit and was better correlated with the experimental data. Experimental data were subjected to analysis of variance at a 95% confidence level. Results showed that Ppy-Fe3O4 additives better enhanced both biogas yield and methane contents significantly when compared to the control. It was also observed that all iron-additive supplemented processes were more degraded when compared with the control.