Flower-shaped anatase TiO<sub>2</sub>mesostructures with excellent photocatalytic properties

Arun, T.; Chacko, Daya K.; Madhavan, Asha Anish; Deepak, T. G.; Anjusree, G. S.; Thomas, Sara; Ramakrishna, Seeram; Nair, Shantikumar V.; Nair, A. Sreekumaran

doi:10.1039/c3ra45021j

Cited by 23 publications

(20 citation statements)

References 23 publications

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“…The pore size distribution calculated from the desorption branch of the nitrogen isotherm by the BJH method shows a narrow Based on the experimental results mentioned above, the formation mechanism of anatase TiO 2 can be described by the Eqs. (2)(3)(4)(5).…”

Section: Photocatalytic Assessmentsmentioning

confidence: 98%

“…Titanium dioxide (TiO 2 ) has been widely studied due to its unique optical, electronic properties, and potential applications in photocatalysis, solar cells, energy conversion, chemical sensing, and so on [1][2][3][4][5][6][7][8][9]. Commonly, the anatase TiO 2 is more active than the other TiO 2 crystal phases, such as rutile and brookite [10,11], and the properties of TiO 2 -based materials strongly depend on their crystallinity [12].…”

Section: Introductionmentioning

confidence: 99%

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A simple way to synthesize anatase with high thermal stability

et al. 2015

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A simple and cost-effective method was proposed to synthesize nano-crystallized pure anatase titanium dioxide (TiO 2 ) photocatalysts with a high thermal stability. The initial TiCl 4 was reacted with a NaOH aqueous solution to form an amorphous sodium titanate, which was then transformed into an amorphous titanium dioxide hydrate through the replacement of Na ? by H ? using a HCl aqueous solution. After annealing, the pure nano-crystallized anatase TiO 2 particles possessed a high thermal stability up to 900°C. The high concentration of NaOH aqueous solution played an important role in preventing the precipitation of rutile TiO 2 during hydrolysis process and promoting the formation of the nano-crystallized anatase TiO 2 . Samples calcined at 800°C exhibited a significantly higher repeatable photocatalytic activity compared to the standard commercial photocatalyst P25 for the degradation of Rhodamine B in an aqueous suspension. This could be attributed to the synergistic effect of high crystallinity and mesoporous structure. The method is very simple, template-free, and cost effective, which makes it potential for the large-scale production.

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Section: Photocatalytic Assessmentsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

A simple way to synthesize anatase with high thermal stability

et al. 2015

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“…Interestingly, these black TiO 2− x nanorods have a core–shell structure with diameters (≈20–25 nm) larger than those of the nanorods (≈10–15 nm) of the white TiO 2 precursor. High‐resolution TEM images (Figure d) of the black TiO 2− x show that the pearl necklace‐like core is highly crystalline with a lattice spacing of ≈0.35 nm that matches well with (101) plane of anatase TiO 2 . The shell is an amorphous layer with a thickness of ≈3 nm.…”

Section: Resultsmentioning

confidence: 80%

Black Titania with Nanoscale Helicity

Nguyen

Lizundia

et al. 2019

Adv Funct Materials

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The fabrication of mesoporous black titanium dioxide (TiO 2−x ) with a chiral nematic organization of core-shell nanorods is reported. Chiral templating of TiO 2 nanoparticles onto gelatin-functionalized cellulose nanocrystals (CNCs) followed by calcination yields carbonized TiO 2 /CNC helical materials that recover white TiO 2 replicas after carbon removal. The hydrothermal surface reduction of the traditional white TiO 2 by ascorbic acid affords freestanding chiral nematic black TiO 2−x . The black TiO 2−x is a visible light active semiconducting mesoporous structure constructed by chiral nematic crystalline-amorphous TiO 2 core-shell nanorods. The chiral black TiO 2−x nanoparticles supported on mesoporous nanocarbon networks are evaluated as lithium-ion battery anode electrodes. Beyond the current efforts, these black TiO 2−x materials and their composites may be useful in the fields of energy storage and catalysis.

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“…Numerous experimental attempts have been made to alter its properties for wide variety of functionalities. Recently, introduction of band gap engineering [14] into II-VI semiconducting materials has gained much more consideration due to its excellent structural, optical, electrical, photocatalytic and magnetic properties [14][15][16][17][18]. Band gap engineering can alter the electronic band structure in the desired form by changing the composition of semiconductors with doping.…”

mentioning

confidence: 99%

Synthesis, Structural and Optical Properties of Mn Doped ZnO with its Photocatalytic Activity

Gautham¹,

Varma²,

Sreekanth³

et al. 2018

Asian J. Chem.

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Industrial development is an inevitable factor in the growth of any nation and on the other hand it's also the factor for increasing the pollution caused from hazardous metals [1]. Irrelevant of whether advanced or not, the problem faced by almost all sectors of every country is the rottenness caused mainly by ground water contamination, air pollution in large scale and hazardous metal wastes. Chromium is a metal that has found its place in the industrial area with its wide application in electroplating, tanning, refractory materials, wood preservatives and many more [2] but it has also received biological attention due to its major role in contributing to the industrial pollution and its toxicity to plants and animals [3]. The existence of Cr is in two states, i.e., trivalent and hexavalent chromium. The hexavalent form of chromium is 500 times more toxic than the trivalent form [4]. Chromium(VI) and its compounds are highly toxic when inhaled or ingested. It is hemotoxic, genotoxic and carcinogenic. When hexavalent

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Flower-shaped anatase TiO₂mesostructures with excellent photocatalytic properties

Cited by 23 publications

References 23 publications

A simple way to synthesize anatase with high thermal stability

A simple way to synthesize anatase with high thermal stability

Black Titania with Nanoscale Helicity

Synthesis, Structural and Optical Properties of Mn Doped ZnO with its Photocatalytic Activity

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Flower-shaped anatase TiO2mesostructures with excellent photocatalytic properties

Cited by 23 publications

References 23 publications

A simple way to synthesize anatase with high thermal stability

A simple way to synthesize anatase with high thermal stability

Black Titania with Nanoscale Helicity

Synthesis, Structural and Optical Properties of Mn Doped ZnO with its Photocatalytic Activity

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Flower-shaped anatase TiO₂mesostructures with excellent photocatalytic properties