α-Nickel hydroxide 3D hierarchical architectures: Controlled synthesis and their applications on electrochemical determination of H2O2

Wu, Zhengcui; Xu, Chengrong; Chen, Hua-Mao; Li, Yuhang; Wu, Yaqin; Gao, Feng

doi:10.1016/j.materresbull.2013.02.080

Cited by 11 publications

(3 citation statements)

References 37 publications

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“…In a w/o microemulsion system, the droplets are spherical and the radius of the water pool is linearly correlated with the water content. Figure C depicts the morphology of the NaCMC (0.01 g%)/(14-4-14 + Bu) (1:2)/IPM microemulsion system, which is quite similar to the spheroid morphology of the 3D-Ni(OH) 2 microemulsion of water/cetyltrimethylammonium bromide (CTAB) …”

Section: Results and Discussionmentioning

confidence: 67%

Physicochemical Behaviors of Cationic Gemini Surfactant (14-4-14) Based Microheterogeneous Assemblies

et al. 2014

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A comprehensive study of micellization and microemulsion formation of a cationic gemini surfactant (tetramethylene-1,4-bis(dimethyltetradecylammonium bromide; 14-4-14) in the absence or presence of hydrophobically modified polyelectrolyte, sodium carboxymethylcellulose (NaCMC), has been conducted by conductometry, tensiometry, microcalorimetry, and fluorimetry methods at different temperatures. Both critical micelle concentration and degree of ionization of the surfactant have been observed to increase with increasing temperature. The interfacial and thermodynamic parameters were evaluated. The standard Gibbs free energy of micellization (ΔGm°) is negative, which decreases with increase in temperature. Larger entropic contribution is observed compared to the enthalpy. The interaction of 14-4-14 with NaCMC produces coacervates which was determined from turbidimetry method. The pseudoternary phase behavior of the microemulsion systems comprising water (or NaCMC as additive), 14-4-14, isopropanol (IP) or n-butanol (Bu) as cosurfactant, and isopropyl myristate (IPM) were studied at 298 K. Phase diagrams reveal that IP derived microemulsions (in the absence of NaCMC) offer a large isotropic region compared to Bu-derived systems at comparable physicochemical conditions. Increasing the concentration of IP or Bu decreases the isotropic region in the phase diagram. NaCMC influences the microemulsion zone, depending upon its concentration, and type of cosurfactant and surfantant/cosurfactant ratio. Dynamic light scattering and conductometric measurements show the size of the droplet, threshold temperature of percolation, scaling parameters, and activation energy of the percolation process of 14-4-14/IP or Bu derived microemulsion systems without/with NaCMC at various physicochemical conditions. Bu exerts a greater effect to reduce θt than IP as a cosurfactant (in the absence of NaCMC) at comparable ω. On the other hand, IP showed better percolating effect than Bu in the presence of NaCMC. Bu and IP (as cosurfactant) and NaCMC (as additive) influenced the microemulsion droplet size (Dh) to different extents under comparable conditions. Temperature insensitive microemulsions have been reported at the studied temperature range (298–353 K). 14-4-14/IP (1:2)-derived microemulsion showed a fractured surface at fixed ω = 15, where ω is the water and surfactant molar ratio, and temperature (298 K); whereas, large scale mesospheres comprising multiple closely winded nanoslices and spheroid morphology were formed in 14-4-14/IP and 14-4-14/Bu microemulsions, respectively, in the presence of 0.01 g % NaCMC, at comparable conditions. These systems revealed good antimicrobial activity toward the strains of Gram-positive Bacillus subtilis and Gram-negative Escherichia coli bacteria at 298 K, and inhibitory effect was governed by ω, type of cosurfactant, and bacterial strains.

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Section: Results and Discussionmentioning

confidence: 67%

Physicochemical Behaviors of Cationic Gemini Surfactant (14-4-14) Based Microheterogeneous Assemblies

et al. 2014

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“…Recently, a urine glucose meter has been developed and commercialized, this device has exhibited stable and quantifiable results in the presence of inferential substances by focusing on blocking them [6] , [7] , [9] . For the facilitation of electron transfer, conducting nanomaterials were introduced and systematically placed on the surface of electrodes and characterized [5] , [15] , [2] , [18] , [16] . It has been well described in previous studies that electron transfer efficiencies or amperometric responses to glucose concentration is significantly increased as nanoparticles are applied on the electrodes when compared those without nanoparticles [8] , [4] .…”

Section: Introductionmentioning

confidence: 99%

Reusable urine glucose sensor based on functionalized graphene oxide conjugated Au electrode with protective layers

Kim

Jang

Veerapandian

et al. 2014

Biotechnology Reports

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An electrochemical based system with multiple layers coated on a functionalized graphene oxide Au electrode was developed to measure glucose concentration in urine in a more stable way. Two types of gold printed circuit boards were fabricated and graphene oxide was immobilized on their surface by chemical adsorption. Multiple layers, composed of a couple of polymers, were uniformly coated on the surface electrode. This device exhibited higher electrochemical responses against glucose, a greater resistivity in the presence of interferential substances in urine, and durable stabilities for longer periods of time than conventional units. The efficiency in current level according to the order and ratio of solution was evaluated during the immobilization of the layer. The fabricated electrodes were then also evaluated using hyperglycemic clinical samples and compared with the patterns of blood glucose measured with commercially available glucose meters. Our findings show that not only was their pattern similar but this similarity is well correlated.

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“…22 In addition, the band around 640 and 1394 cm −1 can be referred to the δ O-H and CO vibration of HCOO − , respectively. 23 Both of the CO 3 2− and HCOO − anions take three kinds of coordination modes. For six CO 3 2− anions, (i) one anion coordinates in a from the reported compounds with an even number of metal atoms containing 2, 4, 8 and 12 lanthanide centers.…”

Section: Crystal Structure Ofmentioning

confidence: 99%

Syntheses, structures, luminescence and magnetic properties of three high-nuclearity neodymium compounds based on mixed sulfonylcalix[4]arene-phosphonate ligands

Jiang

et al. 2016

CrystEngComm

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α-Nickel hydroxide 3D hierarchical architectures: Controlled synthesis and their applications on electrochemical determination of H2O2

Cited by 11 publications

References 37 publications

Physicochemical Behaviors of Cationic Gemini Surfactant (14-4-14) Based Microheterogeneous Assemblies

Physicochemical Behaviors of Cationic Gemini Surfactant (14-4-14) Based Microheterogeneous Assemblies

Reusable urine glucose sensor based on functionalized graphene oxide conjugated Au electrode with protective layers

Syntheses, structures, luminescence and magnetic properties of three high-nuclearity neodymium compounds based on mixed sulfonylcalix[4]arene-phosphonate ligands

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