A versatile bio-inspired material platform for catalytic applications: micron-sized "buckyball-shaped" TiO2 structures

Download

index.pdf

Date

2015-01-01

Author

Altunöz Erdoğan, Deniz
Solouki, Touradj
Ozensoy, Emrah

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

167
views

0
downloads

A simple sol-gel synthesis method is presented for the production of micron-sized buckyball-like TiO2 architectures using naturally occurring Lycopodium clavatum (LC) spores as biotemplates. We demonstrate that by simply altering the calcination temperature and titanium(IV) isopropoxide : ethanol volume ratio, the crystal structure and surface composition of the buckyball-like TiO2 overlayer can be readily fine-tuned. After the removal of the biological scaffold, the unique surface morphology and pore structure of the LC biotemplate can be successfully transferred to the inorganic TiO2 overlayer. We also utilize photocatalytic degradation of Rhodamine B dye samples to demonstrate the photocatalytic functionality of these micron-sized buckyball-like TiO2 architectures. Moreover, we show that the photocatalytic activity of TiO2 overlayers can be modified in a controlled manner by varying the relative surface coverages of anatase and rutile domains. These results open a potential gateway for the synthesis of a variety of bio-inspired materials with unique surface properties and shapes comprised of reducible metal oxides, metal sulfides, mixed-metal oxides, and/or perovskites.

Subject Keywords

Titanium-Dioxide nanomaterials, Photocatalytic activity, Fibers, Nanoparticles, Template, Systems, Anatase

URI

https://hdl.handle.net/11511/43013

Journal

RSC ADVANCES

DOI

https://doi.org/10.1039/c5ra04171f

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

New Catalytic Materials for the Direct Epoxidation of Propylene by Oxygen: Application of High-Throughput Pulsed Laser Ablation Kahn, Michael; Seubsai, Anusorn; Önal, Işık; Senkan, Selim (2010-02-01) New catalytic materials were prepared by depositing nanoparticles of 35 different metals as well as their select binary combinations on Al2O3, CeO2, SiO2, TiO2, and ZrO2 supports. Nanoparticles were synthesized by high-throughput pulsed laser ablation (PLA). Catalytic materials were then screened for their selectivities towards the synthesis propylene oxide (PO) from propylene and oxygen using array channel microreactors at 1 atm and 300, 333, and 367 A degrees C. A gas hourly space velocity (GHSV) of 20,00...
Development of novel Ag/bauxite nanocomposite as a heterogeneous catalyst for biodiesel production Bet-Moushoul, Elsie; Farhadi, Khalil; Mansourpanah, Yaghoub; Molaie, Rahim; Forough, Mehrdad; Nikbakht, Ali Mohammad (2016-07-01) Ag/bauxite nanocomposites have been prepared using in situ reduction of aqueous AgNO3 solution in a bauxite matrix and investigated for the transesterification of sunflower oil with methanol in order to study their potential as heterogeneous catalysts. The prepared nanocopmosites were characterized by XRD, SEM, EDX, FT-IR, and TG- DTA. The Central Composite Design of the Response Surface Methodology was used to optimize the effect of reaction temperature, reaction time, catalyst loading and methanol to oil ...
Novel supramolecular organocatalyst for asymmetric aldol reactions Demircan, Ezgi; Demir, Ayhan Sıtkı; Tanyeli, Cihangir; Department of Chemistry (2013) The proline–calix[4]arene thiourea host–guest complex catalyzed intermolecular aldol reaction of aromatic aldehydes with cyclohexanone is developed. The anti-configured products were obtained in good yields and high enantioselectivities. The reaction is proposed to work via modified Houk–List model, where the carboxylate part of the proline constitutes a supramolecular system with the thiourea. The outcome of the study indicates the influence of the calix[4]arene thiourea on the reactivity and selectivity i...
The AgcorePdshell bimetallic nanoparticles: simple biological synthesis and characterization Farhadi, Khalil; Sabzi, Reza Emamali; Forough, Mehrdad; Pourhossein, Atefeh; Molaei, Rahim; Ebrahimi, Rokhsareh (2015-11-01) In this work and for the first time, bimetallic Ag-Pd nanoparticles equipped with a core-shell structure were prepared biologically by employing a galvanic displacement reaction in which the added PdCl2 reacts with an Ag nanotemplate containing an adsorbed soaproot (Acanthe phylum bracteatum) extract. Four samples with different Ag/Pd molar ratios of 100:2, 100:5, 100:10 and 100:15 were prepared to synthesize the bimetallic nanoparticles with a core-shell structure. The bimetallic Ag-Pd nanoparticles were c...
A NEW FORM OF LUMINESCENT SILICON - SYNTHESIS OF SILICON NANOCLUSTERS IN ZEOLITE-Y DAG, O; KUPERMAN, A; MACDONALD, PM; OZIN, GA (1994-01-01) The chemical vapor deposition (CVD) of disilane within the diamond lattice of 13 Angstrom supercages in the acid farm of zeolite Y (HY) has been employed to assemble an array of silicon nanoclusters. In this process, Si2H6 molecules are reactively anchored to Bronsted acid sites in dehydrated HY. This reaction is quantitative as indicated by the disappearance of characteristic nu OH modes in FTIR spectra. Controlled thermal treatment of these samples in a closed system induces a series of H-2 elimination re...

Citation Formats

D. Altunöz Erdoğan, T. Solouki, and E. Ozensoy, “A versatile bio-inspired material platform for catalytic applications: micron-sized “buckyball-shaped” TiO2 structures,” RSC ADVANCES, pp. 47174–47182, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/43013.