Recent advances of titanium dioxide (TiO<sub>2</sub>) for green organic synthesis

Oi, Lee Eng; Choo, Min-Yee; Lee, Hwei Voon; Hamid, Sharifah Bee Abd; Juan, Joon Ching

doi:10.1039/c6ra22894a

Cited by 165 publications

(77 citation statements)

References 116 publications

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“…The photocatalytic activity order for three polymorphs obtained here is in agreement with most previous studies. [43][44][45] There are several literatures reporting that the photocatalytic activity of rutile TiO 2 is better than its anatase counterpart. 46 It is well documented that the photocatalytic activity of TiO 2 is closely related to several factors, such as crystal structure, crystalline size, defect concentration, exposing crystal surface, etc., all of which are determined by synthetic conditions.…”

Section: B-tio 2 Nanocrystals Made With Urea and Naohmentioning

confidence: 99%

Insights into TiO₂ polymorphs: highly selective synthesis, phase transition, and their polymorph-dependent properties

2017

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Section: B-tio 2 Nanocrystals Made With Urea and Naohmentioning

confidence: 99%

Insights into TiO₂ polymorphs: highly selective synthesis, phase transition, and their polymorph-dependent properties

2017

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“…Owing to its outstanding properties, low toxicity and low cost, TiO 2 has been attracting tremendous attention for environmental and energy applications [ 1 ] such as photocatalysis [ 2 , 3 , 4 ], catalysis [ 5 ], water-splitting [ 6 ], sensing [ 7 ] and energy conversion and storage [ 8 , 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Tuning Texture and Morphology of Mesoporous TiO2 by Non-Hydrolytic Sol-Gel Syntheses

et al. 2018

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The development of powerful synthetic methodologies is paramount in the design of advanced nanostructured materials. Owing to its remarkable properties and low cost, nanostructured TiO2 is widely investigated for applications such as photocatalysis, energy conversion or energy storage. In this article we report the synthesis of mesoporous TiO2 by three different non-hydrolytic sol-gel routes, and we investigate the influence of the synthetic route and of the presence and nature of the solvent on the structure, texture and morphology of the materials. The first route is the well-known ether route, based on the reaction of TiCl4 with iPr2O. The second and third routes, which have not been previously described for the synthesis of mesoporous TiO2, involve the reaction of Ti(OiPr)4 with stoichiometric amounts of acetophenone and benzoic anhydride, respectively. All materials are characterized by XRD, N2 physisorption and SEM. By playing with the non-hydrolytic route used and the reaction conditions (presence of a solvent, nature of the solvent, calcination), it is possible to tune the morphology and texture of the TiO2. Depending on the reaction conditions, a large variety of mesoporous TiO2 nanostructures could be obtained, resulting from the spontaneous aggregation of TiO2 nanoparticles, either rounded nanoparticles, platelets or nanorods. These nanoparticle networks exhibited a specific surface area up to 250 m2 g−1 before calcination, or up to 110 m2 g−1 after calcination.

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“…Semiconductor materials have become of great significance owing to their wide potential applications in important fields of modern society, such as electrochemical sensors, organic synthesis, self-cleaning surfaces, solar driven hydrogen production, and wastewater treatment [ 1 , 2 , 3 , 4 , 5 ]. Current wastewater treatment technologies can be assisted by semiconductor photocatalysis in overcoming inadequate removal of emerging contaminants, including pharmaceuticals [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Elucidating the Photocatalytic Behavior of TiO2-SnS2 Composites Based on Their Energy Band Structure

et al. 2018

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TiO2-SnS2 composite semiconducting photocatalysts with different building component ratios were prepared by hydrothermal synthesis (TiO2-SnS2-HT) and by immobilization of commercial TiO2 and SnS2 particles (TiO2-SnS2-COMM). The band gap values, which determine the catalysts’ photoactivity, were examined by diffuse reflectance spectroscopy and Kubelka–Munk transformations. The catalysts’ surface properties: specific surface area, charge and adsorption capacitance at the solid–solution interface were characterized using BET analysis, potentiometric titration and electrochemical impedance spectroscopy, respectively. The electronic band structure of TiO2-SnS2 photocatalyst, as the key property for the solar-driven photocatalysis, was deduced from the thermodynamic data and the semiconducting parameters (type of semiconductivity, concentration of the charge carriers, flat band potential) obtained by Mott–Schottky analysis. The photoactivity of both composites was studied in photocatalytic treatment of diclofenac (DCF) under simulated solar irradiation and was compared to the benchmark photocatalyst (TiO2 P25) activity. The influence of process parameters, such as pH, H2O2, and composite formulation on the effectiveness of DCF removal and conversion was investigated and discussed by employing response surface modeling (RSM) approach. The photocatalytic efficiency of both composite materials was discussed on the basis of the hetereojunction formation that facilitated the photoelectron transfer, promoting more efficient photocatalytic degradation of DCF.

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Recent advances of titanium dioxide (TiO₂) for green organic synthesis

Abstract: This review focuses on the recent development of TiO2 as a catalyst in green organic synthesis including in hydrodeoxygenation, hydrogenation, esterification/transesterification, the water–gas shift reaction, and visible light-induced organic transformation.

Cited by 165 publications

References 116 publications

Insights into TiO₂ polymorphs: highly selective synthesis, phase transition, and their polymorph-dependent properties

Insights into TiO₂ polymorphs: highly selective synthesis, phase transition, and their polymorph-dependent properties

Tuning Texture and Morphology of Mesoporous TiO2 by Non-Hydrolytic Sol-Gel Syntheses

Elucidating the Photocatalytic Behavior of TiO2-SnS2 Composites Based on Their Energy Band Structure

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Recent advances of titanium dioxide (TiO2) for green organic synthesis

Abstract: This review focuses on the recent development of TiO2 as a catalyst in green organic synthesis including in hydrodeoxygenation, hydrogenation, esterification/transesterification, the water–gas shift reaction, and visible light-induced organic transformation.

Cited by 165 publications

References 116 publications

Insights into TiO2 polymorphs: highly selective synthesis, phase transition, and their polymorph-dependent properties

Insights into TiO2 polymorphs: highly selective synthesis, phase transition, and their polymorph-dependent properties

Tuning Texture and Morphology of Mesoporous TiO2 by Non-Hydrolytic Sol-Gel Syntheses

Elucidating the Photocatalytic Behavior of TiO2-SnS2 Composites Based on Their Energy Band Structure

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Product

Resources

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Recent advances of titanium dioxide (TiO₂) for green organic synthesis

Insights into TiO₂ polymorphs: highly selective synthesis, phase transition, and their polymorph-dependent properties

Insights into TiO₂ polymorphs: highly selective synthesis, phase transition, and their polymorph-dependent properties