Nanoarchitectonics: bottom-up creation of functional materials and systems

Ariga, Katsuhiko

doi:10.3762/bjnano.11.36

Cited by 16 publications

(10 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this work, we discuss the possibility of constructing nano-organized MOF thin films capable of tailoring and tuning the molecular transport across interfaces using predesigned, assemblable building blocks. Our nanoarchitectonic approach − takes advantage of the versatility of colloidal chemistry for surface functionalization of nano-objects, and exploits the effect of cysteamine postsynthetic modification of ZIF-8 units to create nanostructured, self-assembled films on gold substrates. − Aside from surface positioning of −SH moieties, as previously reported, we observed that cysteamine molar ratios and exposure times used for ZIF-8 colloidal units modification can yield partial coordinative chemical etching, as evidenced by particle surface roughening. Moreover, such partial etching causes the appearance of additional (tunable) superimposed mesoporosity of ZIF-8 units, which can effectively modulate transport through the assembled porous media, a key feature for the design of novel materials for separation technologies.…”

Section: Introductionsupporting

confidence: 55%

Self-Assembled Mesoporous Zeolitic Imidazolate Framework-8 (ZIF-8) Nanocrystals Bearing Thiol Groups for Separations Technologies

Segovia

Tuninetti

Azzaroni

et al. 2020

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Colloidal suspensions of Zn-based ZIF-8 metal–organic framework (MOF) particles were synthesized (both micrometer μ-ZIF-8- and nanometer n-ZIF-8-sized, respectively). Postsynthetic modification was carried using 2-amino-ethanethiol (cysteamine or Cys), a thiol-bearing monodentate ligand, and particles obtained were employed for the assembly of films on gold-coated electrode surfaces. The results obtained show that, aside from conferring chemical affinity toward Au, when suitable molar ratios are employed, cysteamine modification causes partial coordinative chemical etching of inherently microporous ZIF-8 units, thus giving rise to additional mesoporosity. Cysteamine concentration and exposure time were found to act as control parameters ultimately determining the transport properties of porous films obtained, which can then feature, e.g., size-exclusion effects. The colloidal modification strategies like the one hereby described can be employed for the preparation of robust nano-organized MOF thin films with hierarchical porosity, which bear great potential for its application in separation technologies.

show abstract

Section: Introductionsupporting

confidence: 55%

Self-Assembled Mesoporous Zeolitic Imidazolate Framework-8 (ZIF-8) Nanocrystals Bearing Thiol Groups for Separations Technologies

Segovia

Tuninetti

Azzaroni

et al. 2020

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…It has been verified that constructing TiO 2based heterostructured composites by using visible-lightresponsive semiconductors with suitable band structures provides a pathway for the advancement of highly efficient photocatalysts [9]. It has been demonstrated that the assembly of various nanoscale building blocks to form the corresponding nanoarchitectonics provides an ideal pathway for the syntheses of a large variety of functional materials [10][11][12][13][14][15]; in particular, for the fabrication of specific catalytic materials [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Bi₂WO₆/TiO₂-nanotube composites derived from natural cellulose for visible-light photocatalytic treatment of pollutants

Lin¹,

Yang²,

Huang³

2022

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

A series of Bi2WO6/TiO2-nanotube (Bi2WO6/TiO2-NT) heterostructured composites were prepared by utilizing natural cellulose (e.g., laboratory filter paper) as the structural template. The obtained nanoarchitectonics, namely Bi2WO6/TiO2-NT nanocomposites, displayed three-dimensionally interwoven structures which replicated the initial cellulose template. The composite Bi2WO6/TiO2-NT nanotubes were formed by TiO2 nanotubes that uniformly anchored with Bi2WO6 nanoparticles of various densities on the surface. The composites exhibited improved photocatalytic activities toward the reduction of Cr(VI) and degradation of rhodamine B under visible light (λ > 420 nm), which were attributed to the uniform anchoring of Bi2WO6 nanoparticles on TiO2 nanotubes, as well as strong mutual effects and well-proportioned formation of heterostructures in between the Bi2WO6 and TiO2 phases. These improvements arose from the cellulose-derived unique structures, leading to an enhanced absorption of visible light together with an accelerated separation and transfer of the photogenerated electron–hole pairs of the nanocomposites, which resulted in increased effective amounts of photogenerated carriers for the photocatalytic reactions. It was demonstrated that the photoinduced electrons dominated the photocatalytic reduction of Cr(VI), while hydroxyl radicals and reactive holes contributed to the photocatalytic degradation of rhodamine B.

show abstract

“…The strong interactions among the unsupported trimetallic nanoparticles leads to aggregation resulting in reduced activity and stability. In this regard, structural regulation can be obtained via atomic-level manipulation using established materials chemistry concepts towards the assembly of functional nanoarchitectonics [25][26][27]. The assembly of nanoscale objects through combination and in situ growth routes, leading to high-performance nanoarchitectonics, is an interesting strategy.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic oxygen reduction activity of AgCoCu oxides on reduced graphene oxide in alkaline media

Madakannu¹,

Patil²,

Kakade³

et al. 2022

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

Silver-based electrocatalysts as promising substitutes for platinum materials for cathodic oxygen electroreduction have been extensively researched. Electrocatalytic enhancement of the Ag nanoarchitectonics can be obtained via support structures and amalgamating Ag with one or two additional metals. The work presented here deals with a facile microwave-assisted synthesis to produce bimetallic Ag-Cu and Ag-Co (1:1) oxide nanoparticles (NPs) and trimetallic AgCuCo (0.6:1.5:1.5, 2:1:1, and 6:1:1) oxide NPs supported on a reduced graphene oxide (rGO) matrix. Morphology, composition, and functional groups were methodically analysed using various microscopic and spectroscopic techniques. The as-prepared electrocatalysts were employed as cathode substrates for the oxygen reduction reaction (ORR) in alkaline medium. Varying the Ag fraction in copper cobalt oxide has a significant influence on the ORR activity. At a ratio of 2:1:1, AgCuCo oxide NPs on rGO displayed the best values for onset potential, half-wave potential, and limiting current density (Jk) of 0.94 V vs RHE, 0.78 V, and 3.6 mA·cm−2, respectively, with an electrochemical active surface area of 66.92 m2·g−1 and a mass activity of 40.55 mA·mg−1. The optimum electrocatalyst shows considerable electrochemical stability over 10,000 cycles in 0.1 M KOH solution.

show abstract

Nanoarchitectonics: bottom-up creation of functional materials and systems

Cited by 16 publications

References 42 publications

Self-Assembled Mesoporous Zeolitic Imidazolate Framework-8 (ZIF-8) Nanocrystals Bearing Thiol Groups for Separations Technologies

Self-Assembled Mesoporous Zeolitic Imidazolate Framework-8 (ZIF-8) Nanocrystals Bearing Thiol Groups for Separations Technologies

Hierarchical Bi₂WO₆/TiO₂-nanotube composites derived from natural cellulose for visible-light photocatalytic treatment of pollutants

Electrocatalytic oxygen reduction activity of AgCoCu oxides on reduced graphene oxide in alkaline media

Contact Info

Product

Resources

About

Nanoarchitectonics: bottom-up creation of functional materials and systems

Cited by 16 publications

References 42 publications

Self-Assembled Mesoporous Zeolitic Imidazolate Framework-8 (ZIF-8) Nanocrystals Bearing Thiol Groups for Separations Technologies

Self-Assembled Mesoporous Zeolitic Imidazolate Framework-8 (ZIF-8) Nanocrystals Bearing Thiol Groups for Separations Technologies

Hierarchical Bi2WO6/TiO2-nanotube composites derived from natural cellulose for visible-light photocatalytic treatment of pollutants

Electrocatalytic oxygen reduction activity of AgCoCu oxides on reduced graphene oxide in alkaline media

Contact Info

Product

Resources

About

Hierarchical Bi₂WO₆/TiO₂-nanotube composites derived from natural cellulose for visible-light photocatalytic treatment of pollutants