Visible-Light-Responsive Photocatalytic Flow Reactor Composed of Titania Film Photosensitized by Metal Complex-Clay Hybrid

Goto, Takehito; Ogawa, Makoto

doi:10.1021/acsami.5b03128

Cited by 30 publications

(16 citation statements)

References 29 publications

(50 reference statements)

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“…A photocatalytic reaction with high yields and selectivity of phenol can be highly suitable for mass production [167]. The difficulties in the application to continuous-flow systems has been solved by processing the [Ru(bpy) 3 ] 2+ –TiO 2 @clay nanoarchitecture as a film to be mounted in a flow reactor [168]. The film of the [Ru(bpy) 3 ] 2+ TiO 2 –@clay photocatalyst is stable and can be reutilized, which is a very important advantage for the flow system.…”

Section: Reviewmentioning

confidence: 99%

Photoactive nanoarchitectures based on clays incorporating TiO₂and ZnO nanoparticles

Ruiz-Hitzky¹,

Aranda²,

Akkari³

et al. 2019

Beilstein J. Nanotechnol.

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Thought as raw materials clay minerals are often disregarded in the development of advanced materials. However, clays of natural and synthetic origin constitute excellent platforms for developing nanostructured functional materials for numerous applications. They can be easily assembled to diverse types of nanoparticles provided with magnetic, electronic, photoactive or bioactive properties, allowing to overcome drawbacks of other types of substrates in the design of functional nanoarchitectures. Within this scope, clays can be of special relevance in the production of photoactive materials as they offer an advantageous way for the stabilization and immobilization of diverse metal-oxide nanoparticles. The controlled assembly under mild conditions of titanium dioxide and zinc oxide nanoparticles with clay minerals to give diverse clay–semiconductor nanoarchitectures are summarized and critically discussed in this review article. The possibility to use clay minerals as starting components showing different morphologies, such as layered, fibrous, or tubular morphologies, to immobilize these types of nanoparticles mainly plays a role in i) the control of their size and size distribution on the solid surface, ii) the mitigation or suppression of the nanoparticle aggregation, and iii) the hierarchical design for selectivity enhancements in the catalytic transformation and for improved overall reaction efficiency. This article tries also to present new steps towards more sophisticated but efficient and highly selective functional nanoarchitectures incorporating photosensitizer elements for tuning the semiconductor–clay photoactivity.

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Section: Reviewmentioning

confidence: 99%

Photoactive nanoarchitectures based on clays incorporating TiO₂and ZnO nanoparticles

Ruiz-Hitzky¹,

Aranda²,

Akkari³

et al. 2019

Beilstein J. Nanotechnol.

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“…Due to the changes in photochemical and photophysical properties of the dye once it interacts with clay, many researchers have focused their efforts on developing new optical hybrid materials with unique properties. Such composites can find applications in different research areas such as sensing [ 10 ] and photocatalysis [ 11 ] and have been exploited to improve the thermal [ 12 ], photochemical [ 13 ] and pH stability [ 14 , 15 ] of the incorporated dye [ 16 ]. Furthermore, different methods have been explored in order to increase the adsorption capacity of MMT particles such as calcination, ionic liquid/acidic treatment [ 17 , 18 ] or surface modification [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Changes in Optical Properties upon Dye–Clay Interaction: Experimental Evaluation and Applications

2021

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The development of hybrid materials with unique optical properties has been a challenge for the creation of high-performance composites. The improved photophysical and photochemical properties observed when fluorophores interact with clay minerals, as well as the accessibility and easy handling of such natural materials, make these nanocomposites attractive for designing novel optical hybrid materials. Here, we present a method of promoting this interaction by conjugating dyes with chitosan. The fluorescent properties of conjugated dye–montmorillonite (MMT) hybrids were similar to those of free dye–MMT hybrids. Moreover, we analyzed the relationship between the changes in optical properties of the dye interacting with clay and its structure and defined the physical and chemical mechanisms that take place upon dye–MMT interactions leading to the optical changes. Conjugation to chitosan additionally ensures stable adsorption on clay nanoplatelets due to the strong electrostatic interaction between chitosan and clay. This work thus provides a method to facilitate the design of solid-state hybrid nanomaterials relevant for potential applications in bioimaging, sensing and optical purposes.

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“…Much importantly, the intercalation of organometallic complexes into the interlayer space of Sap brings additional functions caused by the organometallic complexes. In other words, the organometallic complex-Sap hybrids can act as catalysts (Pimchan et al, 2014;Kurokawa et al, 2014;Goto and Ogawa, 2016), catalyst support (Goto and Ogawa, 2015) or optical materials (Sato et al, 2014a;Hosokawa and Mochida, 2015;Tamura et al, 2015;Eguchi et al, 2017).…”

Section: Organometallic Complexmentioning

confidence: 99%

“…The process plays a critical role in natural and artificial photochemical processes such as photosynthesis, photo-sensitized molecular transformation and solar cells (Gust et al, 2009;Hasobe, 2013). Intercalating luminescent cationic dye species in the confined interlayer space of Sap can promote ste resonance energy transfer (FRET) between donor and acceptor dye pairs (Ishida et al, 2013;Olivero et al, 2014;Sato et al, 2014b;Belušáková et al, 2015;Goto et al, 2015;Fujimura et al, 2016;Tsukamoto et al, 2016a;Belušáková et al, 2017). In addition, FRET is sensitive to surface concentration, which could be easily controlled by an appropriate selection of the dye/Sap ratio (Belušáková et al, 2017).…”

Section: Optical Materialsmentioning

confidence: 99%

Modification, hybridization and applications of saponite: An overview

Zhou

et al. 2019

Applied Clay Science

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Modification of saponite (Sap) by surface engineering and intercalation chemistry introduces guest species into the structure of Sap and enhances the functionalities of the resultant Sap-based hybrids or composites. This review summarizes and evaluates latest scientific advances in the strategies for surface engineering, intercalation and hybridization of Sap, the insights into the relevant mechanisms, and the properties and applications of the resultant Sap-based materials. Studies have indicated that Sap can be inorganically modified by acid activation, inorganic cation exchange, pillaring, and adsorption. The methods of preparing organo-saponite (OSap) hybrids can be categorized as follows: 1) exchanging the inorganic cations in the interlayer space of Sap with organic cations; 2) covalent grafting of organic moieties or groups onto the surface of Sap; 3) intercalating polymer into the interlayer space of Sap by solution intercalation, and melt mixing or in situ polymerization. Organic-inorganic modified Sap can be made through the reactions between organic species and inorganic-modified Sap, or by the combination of inorganic species with organic-modified Sap. Modified Sap exhibits exceptional thermal stability, surface acidity, optical effects and adsorption. As such, the modified Sap can be used for optical materials, adsorbents, catalysts and clay/polymer nanocomposites (CPN). Literature survey suggests that future studies should place emphasis on optimizing and scaling up the modification of Sap, probing the thermodynamics, kinetics and mechanisms of the modification of Sap, endowing Sap with novel functionalities, and accordingly advancing the practical applications of the resultant Sap-based materials.

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Visible-Light-Responsive Photocatalytic Flow Reactor Composed of Titania Film Photosensitized by Metal Complex-Clay Hybrid

Cited by 30 publications

References 29 publications

Photoactive nanoarchitectures based on clays incorporating TiO₂and ZnO nanoparticles

Photoactive nanoarchitectures based on clays incorporating TiO₂and ZnO nanoparticles

Changes in Optical Properties upon Dye–Clay Interaction: Experimental Evaluation and Applications

Modification, hybridization and applications of saponite: An overview

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Visible-Light-Responsive Photocatalytic Flow Reactor Composed of Titania Film Photosensitized by Metal Complex-Clay Hybrid

Cited by 30 publications

References 29 publications

Photoactive nanoarchitectures based on clays incorporating TiO2and ZnO nanoparticles

Photoactive nanoarchitectures based on clays incorporating TiO2and ZnO nanoparticles

Changes in Optical Properties upon Dye–Clay Interaction: Experimental Evaluation and Applications

Modification, hybridization and applications of saponite: An overview

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Photoactive nanoarchitectures based on clays incorporating TiO₂and ZnO nanoparticles

Photoactive nanoarchitectures based on clays incorporating TiO₂and ZnO nanoparticles