A versatile bio-inspired material platform for catalytic applications: micron-sized “buckyball-shaped” TiO<sub>2</sub>structures

Erdogan, Deniz Altunoz; Solouki, Touradj; Özensoy, Emrah

doi:10.1039/c5ra04171f

Cited by 12 publications

(12 citation statements)

References 31 publications

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“…In a typical photocatalytic degradation experiment [3,4], a suspension of mpg-C 3 N 4 powder in deionized water was prepared. After sonication of the prepared aqueous suspension for 20 min, an appropriate amount of dye (RhB, MO, BCP or MB) from its 60 mg L -1 stock solution was added to the mixture in order to have a final dye concentration of 10 mg L -1 .…”

Section: Photocatalytic Activity Measurementsmentioning

confidence: 99%

“…Functional materials synthesized by utilizing novel preparation strategies can be promising photocatalytic platforms that harvest renewable solar energy in order to eliminate hazardous industrial contaminants through energy-efficient pathways. Such economic and technological opportunities led to a rapid growth in the research focusing on photocatalytic materials in the recent decades [1][2][3][4][5]. Among such photocatalytic architectures, graphitic carbon nitride (g-C 3 N 4 ) that is the most stable allotrope of carbon nitride at ambient atmosphere stands out as one of the strong contenders in the photocatalytic air and water purification processes owing to its advantageous properties such as being cost-efficient, abundant, non-toxic, metal-free, and stable nature under ambient conditions with a low electronic band gap falling in the visible (VIS) range of the solar spectrum.…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic Activity of Mesoporous Graphitic Carbon Nitride (mpg-C3N4) Towards Organic Chromophores Under UV and VIS Light Illumination

et al. 2016

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A template-assisted synthetic method including the thermal polycondensation of guanidine hydrochloride (GndCl) was utilized to synthesize highly-organized mesoporous graphitic carbon nitride (mpg-C 3 N 4) photocatalysts. Comprehensive structural analysis of the mpg-C 3 N 4 materials were performed by XPS, XRD, FT-IR, BET and solid-state NMR spectroscopy. Photocatalytic performance of the mpg-C 3 N 4 materials was studied for the photodegradation of several dyes under visible and UV light illumination as a function of catalyst loading and the structure of mpg-C 3 N 4 depending on the polycondensation temperature. Among all of the formerly reported performances in the literature (including the ones for Degussa P25 commercial benchmark), currently synthesized mpg-C 3 N 4 photocatalysts exhibit a significantly superior visible light-induced photocatalytic activity towards rhodamine B (RhB) dye. Enhanced catalytic efficiency could be mainly attributed to the terminated polycondensation process, high specific surface area, and mesoporous structure with a wide pore size distribution. Keywords Graphitic-C 3 N 4 Á Carbon nitride Á UV-Vis light Á Photocatalytic degradation Á Organic dyes Electronic supplementary material The online version of this article (

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Section: Photocatalytic Activity Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photocatalytic Activity of Mesoporous Graphitic Carbon Nitride (mpg-C3N4) Towards Organic Chromophores Under UV and VIS Light Illumination

et al. 2016

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“…One of the most abundant renewable energy sources that can be exploited in heterogeneous catalysis applications in an environmentally friendly and economical manner is the solar energy. Thus, there exists an immense demand to develop novel photocatalytic materials using innovative synthetic methodologies [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Using such synthetic methods, micro/nanostructures such as wires, tubes, rods or spheres can be fabricated preserving the original shape and size of the initial natural template. Pollen grains attract attention as versatile biotemplates due to their unique and sophisticated surface structures at the micro/nanoscale [7,[29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Hierarchical synthesis of corrugated photocatalytic TiO2 microsphere architectures on natural pollen surfaces

Erdogan

Özensoy

2017

Applied Surface Science

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Biomaterials are challenging, yet vastly promising templates for engineering unusual inorganic materials with unprecedented surface and structural properties. In the current work, a novel biotemplate-based photocatalytic material was synthesized in the form of corrugated TiO 2 microspheres by utilizing a sol-gel methodology where Ambrosia trifida (Ab, Giant ragweed) pollen was exploited as the initial biological support surface. Hierarchically synthesized TiO 2 microspheres were structurally characterized in detail via SEM-EDX, Raman spectroscopy, XRD and BET techniques in order to shed light on the surface chemistry, crystal structure, chemical composition and morphology of these novel material architectures. Photocatalytic functionality of the synthesized materials was demonstrated both in gas phase as well as in liquid phase. Along these lines, air and water purification capabilities of the synthesized TiO 2 microspheres were established by performing photocatalytic oxidative NOx(g) storage and Rhodamine B(aq) degradation experiments; respectively. The synthetic approach presented herein offers new opportunities to design and create sophisticated functional materials that can be used in micro reactor systems, adsorbents, drug delivery systems, catalytic processes, and sensor technologies.

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“…Copper‐doped titania (TiO 2 :Cu) hollow microspheres were fabricated using rapeseed pollen as a biotemplate, exhibiting a high absorption ability and photoactivity for chlortetracycline solution degradation . In addition, using naturally spores as biotemplates, micro‐sized bucky ball‐like TiO 2 architectures were produced by a simple sol–gel synthesis method, demonstrating an excellent activity for the photocatalytic degradation of Rhodamine B dye …”

Section: Applications Of Bioinspired Optical Materialsmentioning

confidence: 99%

Optical Functional Materials Inspired by Biology

Shang

et al. 2015

Advanced Optical Materials

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To learn from nature for the rational design of optical devices, the chemical and physical aspects of textures of these natural organisms should be systematically unraveled. Then the basic mechanisms as to how these structural units interact with light must be understood in depth. Finally, whether these morphologies can be fabricated by templating methods, by the current top-down methods, or by selfassembly methods should be well assessed. Up to now, biotemplating methods that take advantage of the physicochemical interactions between organic skeletons and the target solid-state materials are broadly adopted, as they are both cost and time effective. Many natural organisms have been successfully used as biotemplates to fabricate artifi cial photonic materials, including butterfl y wings, [20][21][22][23] beetles, [ 24,25 ] plant leaves, [ 26,27 ] and diatoms. [ 28,29 ] The biotemplating method can not only maintain the morphology of the natural organism, but also mimic the optical functions of the biological species. In addition, a wide range of high-quality photonic nanostructures have been fabricated using top-down methods, such as direct laser writing, photoetching, soft-lithography, and electron beam lithography. [ 10,[30][31][32] Some self-assembly systems can also provide us with novel photonic templates for the fabrication of functional materials, such as the opal structure selfassembled by polymer or silica spheres, [ 33,34 ] and some cubic phases self-assembled in block copolymer systems. [35][36][37] Inspired by natural organisms, researchers have achieved great progress in developing photonic materials in recent years. Many natural species, including birds, [ 3,38,39 ] insects (especially Lepidoptera and beetles), [ 3,[40][41][42][43] plants, [ 44,45 ] and aquatic organisms, [ 29,46 ] have a striking appearance with vivid structural colors originating from elaborate photonic crystals (PCs). PCs are periodic photonic nanostructures at the visible light wavelength scale that can affect the propagation of light. Inspired by these vivid structural colors, optical materials with photonic microstructures and brilliant color have been fabricated with applications in areas covering the cosmetics industry, [ 47 ] textile industry, [ 48 ] printing, [ 49 ] displays, [ 16 ] and security labeling. [ 5 ] As we know, structural colors originate from the interaction of light with various elaborate photonic structures, and are mainly determined by three structural parameters: the refractive index ratio, the volume fraction, and the unit cell size. [ 24 ] For certain optical systems, the photonic structural parameters can be tuned by exerting external fi elds to which the compositions are responsive, such as pH, [ 22,50 ] electromagnetic fi elds, [ 23,51 ] thermal fi elds, [ 52,53 ] gases, [ 54,55 ] and so on. By quantifying the

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A versatile bio-inspired material platform for catalytic applications: micron-sized “buckyball-shaped” TiO₂structures

Abstract: A simple sol–gel synthesis method is presented for the production of micron-sized buckyball-like TiO2architectures using naturally occurringLycopodium clavatum(LC) spores as biotemplates.

Cited by 12 publications

References 31 publications

Photocatalytic Activity of Mesoporous Graphitic Carbon Nitride (mpg-C3N4) Towards Organic Chromophores Under UV and VIS Light Illumination

Photocatalytic Activity of Mesoporous Graphitic Carbon Nitride (mpg-C3N4) Towards Organic Chromophores Under UV and VIS Light Illumination

Hierarchical synthesis of corrugated photocatalytic TiO2 microsphere architectures on natural pollen surfaces

Optical Functional Materials Inspired by Biology

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A versatile bio-inspired material platform for catalytic applications: micron-sized “buckyball-shaped” TiO2structures

Abstract: A simple sol–gel synthesis method is presented for the production of micron-sized buckyball-like TiO2architectures using naturally occurringLycopodium clavatum(LC) spores as biotemplates.

Cited by 12 publications

References 31 publications

Photocatalytic Activity of Mesoporous Graphitic Carbon Nitride (mpg-C3N4) Towards Organic Chromophores Under UV and VIS Light Illumination

Photocatalytic Activity of Mesoporous Graphitic Carbon Nitride (mpg-C3N4) Towards Organic Chromophores Under UV and VIS Light Illumination

Hierarchical synthesis of corrugated photocatalytic TiO2 microsphere architectures on natural pollen surfaces

Optical Functional Materials Inspired by Biology

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A versatile bio-inspired material platform for catalytic applications: micron-sized “buckyball-shaped” TiO₂structures