Surface Photovoltage NO Gas Sensor with Properties Dependent on the Structure of the Self-Ordered Mesoporous Silicate Film

Yamada, Takeo; Zhou, Haoshen; Uchida, Hidekazu; Tomita, Masato; Ueno, Yuko; Ichino, Toshihiro; Honma, Itaru; Asai, Keisuke; Katsube, Teruaki

doi:10.1002/1521-4095(20020605)14:11<812::aid-adma812>3.0.co;2-w

Cited by 116 publications

(88 citation statements)

References 13 publications

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“…To solve this problem, instead of hexagonal mesoporous silica, some researchers have used cubic mesoporous silica to synthesize the inorganic membrane. 15,19 Recently, a porous anodic alumina membrane with a perpendicularly oriented silica-surfactant nanochannel assembly membrane (NAM) was synthesized. 26 The porous anodic alumina membrane has a packed array of columnar pores ranging from tens to hundreds of nanometers in diameter, and the channel direction of the columnar pores is perpendicular to the membrane.…”

Section: Introductionmentioning

confidence: 99%

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Permeation Flux of Organic Molecules through Silica-surfactant Nanochannels in a Porous Alumina Membrane

et al. 2006

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Separation membranes are used in many fields ranging from medical science to industry, and much effort has been devoted to the development of new membranes with high qualities. [1][2][3] Recently, inorganic membranes have attracted much attention because of their superior mechanical strength, thermal stability and resistance to organic solvents. A variety of preparation and application methods of inorganic membranes have been reported. [4][5][6][7][8][9][10][11][12][13][14][15] Zeolites 4-8 and ceramics 9-14 are frequently used as sources of inorganic membranes. Zeolites are porous crystalline materials, which have a high surface area to volume ratio. Membranes made of zeolites are used for catalysts, 5 pervaporation 6,7 and high temperature separation of hydrocarbon isomer vapors. 8 Ceramics such as alumina are hard and heat-resistant materials made with nonmetallic minerals, and ceramic membranes for gas separation 13 and catalysts 14 have been synthesized.Mesoporous silica has also been adopted as a source material in the synthesis of inorganic membranes. 9,15 Mesoporous silica is an ordered material that has three different mesophases: lamellar, cubic and hexagonal. 16,17 In particular, the hexagonal mesophase possesses highly regular arrays of uniform-sized channels whose diameters are in the approximate range of 1 to over 10 nm depending on the surfactants and reaction parameters. Because of its porosity, high surface area, ordered pore arrangement and pore size uniformity, mesoporous silica has been the subject of many theoretical and applied studies. 18 For practical applications, the morphology of mesoporous silica is very important. The film is an ideal morphology for separation membranes, sensor 19,20 and optics. 21,22 Usually, mesoporous silica films are prepared on a flat substrate by dipor spin-coating methods. [23][24][25] However, in the case of hexagonal mesoporous silica, the channels are aligned parallel to the substrate surface, and transport of molecules across the film is not possible. In order to achieve separation, straight channels should be oriented perpendicular to the surface to transport molecules across the film. To solve this problem, instead of hexagonal mesoporous silica, some researchers have used cubic mesoporous silica to synthesize the inorganic membrane. 15,19 Recently, a porous anodic alumina membrane with a perpendicularly oriented silica-surfactant nanochannel assembly membrane (NAM) was synthesized. 26 The porous anodic alumina membrane has a packed array of columnar pores ranging from tens to hundreds of nanometers in diameter, and the channel direction of the columnar pores is perpendicular to the membrane.When a precursor solution containing cetyltrimethylammonium bromide (CTAB) surfactant and tetraethyl orthosilicate (TEOS) as a silica source is introduced into the alumina pores, highly ordered hexagonally arranged silica-surfactant nanochannels with pores of 3.4 nm diameter are assembled inside the alumina pores. The channel direction of mesoporous silica is predomi...

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Section: Introductionmentioning

confidence: 99%

“…18 For practical applications, the morphology of mesoporous silica is very important. The film is an ideal morphology for separation membranes, sensor 19,20 and optics. 21,22 Usually, mesoporous silica films are prepared on a flat substrate by dipor spin-coating methods.…”

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confidence: 99%

Permeation Flux of Organic Molecules through Silica-surfactant Nanochannels in a Porous Alumina Membrane

et al. 2006

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“…The nanofluidic systems based on mesoporous silica could be achieved by forming mesoporous silica thin film on a substrate. For example, Yamada et al 13 formed mesoporous silica with a 3D cubic mesostructure on a sensor substrate and sensing of NO gas transported through the silica mesopores was demonstrated. Liu et al 14 formed an azobenzene-modified mesoporous silica thin film with 3D cubic mesostructure on an ITO electrode and the conformation (trans or cis) of azobenzene regulated the effective pore size and the mass transport behavior of ferrocene derivatives.…”

Section: Introductionmentioning

confidence: 92%

Fabrication and Analytical Applications of Hybrid Mesoporous Membranes

Yamaguchi

Teramae

2008

ANAL. SCI.

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Recently, a hybrid mesoporous membrane composed of surfactant-templated mesoporous silica inside a porous anodic alumina membrane has been developed. Since this membrane allows the use of columnar silica-mesopores (silicananochannels) as nanofluidic channels, separation of molecules can be realized by mass transport through the silicananochannel with molecular dimensions. Here, we review the methods to fabricate the hybrid mesoporous membranes, their structural features, and the analytical applications of hybrid mesoporous membranes.

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“…They showed remarkable applications such as in molecular sieves, adsorbents, gas sensors, protein immobilization, etc. [27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

A Novel Catechol Electrochemical Sensor Based on Cobalt Hexacyanoferrate/ (CoHCF)/Au/SBA-15

2015

J Anal Bioanal Tech

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A novel electrochemical sensor for catechol was developed by electrodepositing HAuCl 4 and cobalt hexacyanoferrate (CoHCF) on an ordered mesoporous SBA-15 decorated glassy carbon electrode (GCE). The CoHCF/Au/SBA-15 film was characterized by scanning electron microscopy (SEM) and impedance spectra. A mesoporous SBA-15 was used as a platform that enlarged the surface area of the working electrode. The CoHCF/ Au/SBA-15 modified electrode showed good electrocatalytic activity to catechol and the electrocatalytic response was measured using cyclic voltammetry and Amperometric i-t curve. The electrochemical performance of the sensor for catechol was further enhanced due to the deposition of Au on the electrode surface. Under the optimal conditions, the sensor showed a linear range from 3.0 × 10 -7 M to 5.1 × 10 -5 M of catechol, with a detection limit of 50 nM (S/N=3). Good reproducibility, stability and good selectivity in the presence of numerous organic phenolics made the CoHCF/ Au/SBA-15 modified electrodes applicable to the determination of catechol in the various water samples.

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Surface Photovoltage NO Gas Sensor with Properties Dependent on the Structure of the Self-Ordered Mesoporous Silicate Film

Cited by 116 publications

References 13 publications

Permeation Flux of Organic Molecules through Silica-surfactant Nanochannels in a Porous Alumina Membrane

Permeation Flux of Organic Molecules through Silica-surfactant Nanochannels in a Porous Alumina Membrane

Fabrication and Analytical Applications of Hybrid Mesoporous Membranes

A Novel Catechol Electrochemical Sensor Based on Cobalt Hexacyanoferrate/ (CoHCF)/Au/SBA-15

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