Hierarchical porous polyaniline–silsesquioxane conjugated hybrids with enhanced electrochemical capacitance

Lin, Weihong; Xu, Kai; Xin, Mingliang; Peng, Jun; Xing, Yuxiu; Chen, Mingcai

doi:10.1039/c4ra04422c

Cited by 32 publications

(19 citation statements)

References 50 publications

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“…Three distinct crystalline peaks appeared centered at 2θ = 15.18°, 21.12°, and 25.49°, which corresponding to (020), (021), and (200) crystal planes, respectively, of PANI in its emeraldine salt form 36 . The characteristic peaks at 2θ = 15.18° and 25.49° are ascribed to the perpendicular and parallel periodicity of the polymer chain, respectively 37 , 38 . The average size of the PANI crystallites is determined from the full width at half maximum (W) in radians using Scherrer’s formula; D = 0.9λ/W cos θ; where λ is the X-ray wavelength (CuKα = 0.15405 nm) 35 .…”

Section: Resultsmentioning

confidence: 99%

Preparation of polyaniline/PbS core-shell nano/microcomposite and its application for photocatalytic H2 electrogeneration from H2O

Rabia

Mohamed

Abukhadra

et al. 2018

Sci Rep

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Lead sulfide (PbS) and polyaniline (PANI) nano/microparticles were prepared. Then, PANI/PbS core-shell nano/microcomposites (I, II, and III) were prepared by oxidative polymerization of different aniline concentrations (0.01, 0.03, and 0.05 M), respectively, in the presence of 0.05 M PbS. FT-IR, XRD, SEM, HR-TEM, and UV-Vis analyses were carried out to characterize the samples. From the FT-IR data, there are redshifts in PbS and PANI nano/microparticles bands in comparison with PANI/PbS nano/microcomposites. The average crystallite sizes of PANI/PbS core-shell nano/microcomposites (I, II, and III) from XRD analyses were 46.5, 55, and 42.16 nm, respectively. From the optical analyses, nano/microcomposite (II) has the optimum optical properties with two band gaps values of 1.41 and 2.79 eV. Then, the nano/microcomposite (II) membrane electrode supported on ITO glass was prepared and applied on the photoelectrochemical (PEC) H2 generation from H2O. The characteristics current-voltage and current-time behaviors were measured at different wavelengths from 390 to 636 nm. Also, the incident photon-to-current conversion efficiency (IPCE) under monochromatic illumination condition was calculated. The optimum values for IPCE were 36.5 and 35.2% at 390 and 405 nm, respectively. Finally, a simple mechanism for PEC H2 generation from H2O using the nano/microcomposite (II) membrane electrode was mentioned.

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Section: Resultsmentioning

confidence: 99%

Preparation of polyaniline/PbS core-shell nano/microcomposite and its application for photocatalytic H2 electrogeneration from H2O

Rabia

Mohamed

Abukhadra

et al. 2018

Sci Rep

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“…For the nonporous and porous PANI, three absorption peaks at approximately 355, 439 and 650 nm were attributed to the -* transition in the benzenoid segments, the polaron-* transition and the localized polaron band, respectively. [27][28][29] Nanosilica showed strong absorption in the range 200-300 nm, but the characteristic peak did not appear (Fig. S1).…”

Section: Resultsmentioning

confidence: 99%

Hierarchical porous polyaniline supercapacitor electrode from polyaniline/silica self‐ aggregates

Zhang²,

Xu³

et al. 2018

Polymer International

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To lengthen the lifecycles of polyaniline (PANI) electrodes, a hierarchical porous PANI was synthesized from PANI/silica self‐aggregates through a facile one‐pot method. Hydrogen bonding between NH groups in aniline/PANI and OH groups in nanosilica template led to a type of self‐assembly, which enabled the formation of uniform nanoparticles. Silica self‐aggregates provided macroporous channels, resulting in a decreased diffusion distance. After removal of the hard template, the porous PANI had a large, porous surface area (55.89 m2 g−1), in comparison with nonporous PANI (12.45 m2 g−1). The porous PANI was analyzed using Fourier transform infrared and UV‐visible spectroscopies, scanning electron microscopy, thermogravimetric analysis, cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge–discharge measurements. Because of its hierarchical structure, the resultant porous PANI possessed a higher capacitance (397 F g−1) than nonporous PANI (280 F g−1) at 1 A g−1 in 1 mol L−1 H2SO4 electrolyte. © 2018 Society of Chemical Industry

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“…Three distinct crystalline peaks appeared centered at 2θ = 15.18°, 21.12°, and 25.49°, which corresponding to (020), (021), and (200) crystal planes, respectively, of PANI in its emeraldine salt form 40 . The characteristic peaks at 2θ = 15.18° and 25.49° are ascribed to the perpendicular and parallel periodicity of the polymer chain, respectively 41 , 42 . The average size of the PANI crystallites is determined from the full width at half maximum (W) in radians using Scherrer’s formula; D = 0.9λ/W cos θ; where λ is the X-ray wavelength (CuKα = 0.15405 nm) 43 .…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic properties of PbS/graphene oxide/polyaniline electrode for hydrogen generation

Abukhadra

Rabia

Elsayed

et al. 2017

Sci Rep

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In this work, roll-graphene oxide (Ro-GO), polyaniline (PANI) nano/microparticles, and PbS nanoparticles were prepared by modified Hammer, oxidative polymerization, and chemical bath deposition methods, respectively. These nano/microstructures were characterized, optimized, and designed to form PbS/Ro-GO/PANI nano/microcomposite. Also, the ratios of PbS and Ro-GO were optimized, and the optimized composition of the used composite was 0.4 g PANI, 0.125 g Ro-GO, and 0.075 g PbS. The band gap values for PANI, PbS, Ro-GO, and PbS/Ro-GO/PANI rocomposite were 3, 1.13, 2.86, (1.16, 2) eV, respectively. Two photoelectrode assemblies, Au/PbS/Ro-GO/PANI and PbS/Ro-GO/PANI/ITO/glass were used for the photoelectrochemical (PEC) hydrogen generation. In the first assembly 45 nm- Au layer was sputtered on the surface of a disk of PbS/Ro-GO/PANI composite. For the second assembly, a disk of PbS/Ro-GO/PANI composite was glued on ITO glass using Ag-THF paste. The lifetime efficiency values were 64.2 and 43.4% for the first and second electrode for 2 h, respectively. Finally, the incident photon-to-current conversion efficiency (IPCE) and photon-to-current efficiency (ABPE) were calculated under monochromatic illumination conditions. The optimum IPCE efficiency at 390 nm was 9.4% and 16.17%, whereas ABPE % efficiency was 1.01% and 1.75% for Au/PbS/Ro-GO/PANI and PbS/Ro-GO/PANI/ITO/glass, respectively.

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Hierarchical porous polyaniline–silsesquioxane conjugated hybrids with enhanced electrochemical capacitance

Cited by 32 publications

References 50 publications

Preparation of polyaniline/PbS core-shell nano/microcomposite and its application for photocatalytic H2 electrogeneration from H2O

Preparation of polyaniline/PbS core-shell nano/microcomposite and its application for photocatalytic H2 electrogeneration from H2O

Hierarchical porous polyaniline supercapacitor electrode from polyaniline/silica self‐ aggregates

Photocatalytic properties of PbS/graphene oxide/polyaniline electrode for hydrogen generation

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