One-pot synthesis of TiO2/graphene nanocomposites for excellent visible light photocatalysis based on chemical exfoliation method

Ton, Nhan Nu Thanh; Dao, Anh Thi Ngoc; Kato, Koichiro; Ikenaga, Takuma; Trinh, Dai Xuan; Taniike, Toshiaki

doi:10.1016/j.carbon.2018.03.025

Cited by 69 publications

(22 citation statements)

References 87 publications

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“…Graphene has a large specific surface area and electrical conductivity. The presence of such properties in graphene is of interest to scientists in the preparation of a graphene/nano-TiO 2 -based photocatalyst [ 71 , 72 , 73 ]. After irradiation of a TiO 2 -based photocatalyst, electrons move into the graphene structure.…”

Section: The Utilization Of Photocatalysts Based On Tio mentioning

confidence: 99%

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

et al. 2020

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The growth of industrialization, which is forced to use non-renewable energy sources, leads to an increase in environmental pollution. Therefore, it is necessary not only to reduce the use of fossil fuels to meet energy needs but also to replace it with cleaner fuels. Production of hydrogen by splitting water is considered one of the most promising ways to use solar energy. TiO2 is an amphoteric oxide that occurs naturally in several modifications. This review summarizes recent advances of doped TiO2-based photocatalysts used in hydrogen production and the degradation of organic pollutants in water. An intense scientific and practical interest in these processes is aroused by the fact that they aim to solve global problems of energy conservation and ecology.

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Section: The Utilization Of Photocatalysts Based On Tio mentioning

confidence: 99%

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

et al. 2020

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“…As is known, the theoretical thickness of the single-layer graphene is approximately 0.34 nm. , However, because of variations in the tip–surface interactions and image feedback settings, the thickness of the single-layer graphene measured by AFM is generally higher than the theoretical value. For single-layer graphene, the measured thickness always ranged from 0.4 to 1.0 nm. , We use this thickness (instead of 0.34 nm) to calculate the layers, and the actual layers of MLG used in this study are 6–14, which is a typical MLG. , Moreover, the UV–vis–IR spectrum can also be used to estimate the thickness of MLG, and the number of the MLG layers was calculated as 9 (see the Supporting Information for details).…”

Section: Resultsmentioning

confidence: 99%

“…For singlelayer graphene, the measured thickness always ranged from 0.4 to 1.0 nm. 45,46 We use this thickness (instead of 0.34 nm) to calculate the layers, and the actual layers of MLG used in this study are 6−14, which is a typical MLG. 43,44 Moreover, the UV−vis−IR spectrum can also be used to estimate the thickness of MLG, and the number of the MLG layers was calculated as 9 (see the Supporting Information for details).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Locally Controllable Surface Foaming of Polymers Induced by Graphene via Near-Infrared Pulsed Laser

Zhang

Zheng

et al. 2020

ACS Sustainable Chem. Eng.

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Our study proposed an efficient and environment-friendly strategy to realize the locally controllable surface foaming on polymers via a near-infrared pulsed laser. This laser foaming was induced by the multilayer graphene (MLG), and only 0.05 wt % MLG gave the polymer an excellent foaming performance with good smoothness and a foaming height of 0.41 mm. Benefited from programming and automatically controlling the laser system, foamed patterns of arbitrary shapes with three-dimensional appearance could be accurately written on the polymer surface. Scanning electron microscopy confirmed that the uniform cells produced by laser foaming were mainly ellipsoidal with closed-cell structures (D = 31.5 μm); moreover, the surface foam had three layers with a total thickness of 633.7 μm. X-ray photoelectron spectroscopy (XPS) revealed the surface carbonization of the foam during laser foaming. Both attenuated total reflection Fourier transform infrared spectroscopy and XPS confirmed the weak oxidation of the polypropylene (PP) matrix caused by laser because of the appearance of C−O and CO groups on foams. Besides, the Raman depth imaging demonstrated the layered carbonization distribution in the foam surface. The micro-Raman spectroscopy confirmed that the amorphous carbon and the sp/sp 2 carbon (CC/CC) were two main carbonized products of PP. This study also proposed the mechanism of polymer laser foaming induced by MLG.

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“…3. The π-π interactions between aromatic rings of RB5 and the conjugated structure of GQDs increase the adsorption of the dye on the surface of the TiO 2 /GQDs [26]. 4.…”

Section: Photocatalytic Degradation Of Rb5 Under Sunlight Irradiation By Tio 2 /Gqdsmentioning

confidence: 99%

“…Ton et al [26] showed the photocatalytic efficiency of TiO 2 /reduced graphene oxide (rGO) nanocomposites for degradation of methylene blue (MB) under visible light is 15 and 5 times greater than that of TiO 2 -P25 and TiO 2 / rGO nanocomposite, respectively. Hunge et al [27] prepared WO 3 /TiO 2 nanocomposite to decompose oxalic acid under sunlight irradiation.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient solar photocatalytic degradation of a textile dye by TiO2/graphene quantum dots nanocomposite

Niazi

Goharshadi

Mashreghi

et al. 2021

Photochem Photobiol Sci

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Herein, two sunlight responsive photocatalysts including TiO 2 nanoparticles (NPs) and TiO 2 /graphene quantum dots (GQDs) nanocomposite for degrading a textile dye, Reactive Black 5 (RB5), were prepared. The results showed that 100% of 50 ppm RB5 could be degraded by TiO 2 NPs and TiO 2 /GQDs within 60 and 30 min sunlight irradiation, respectively. Hence, much better photocatalytic activity in degradation of RB5 was achieved by TiO 2 /GQDs under sunlight irradiation compared with pure TiO 2 NPs due to its lower band gap (2.13 eV) and electron/hole recombination rate. The photocatalytic degradation mechanism of RB5 by TiO 2 NPs was elucidated by adding some scavengers to the solution. The main reactive species contributing to RB5 degradation were surface hydroxyl radicals. The first-order solar degradation rate constant of RB5 for TiO 2 / GQDs is greater than that of TiO 2 NPs under sunlight illumination.

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One-pot synthesis of TiO2/graphene nanocomposites for excellent visible light photocatalysis based on chemical exfoliation method

Cited by 69 publications

References 87 publications

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

Locally Controllable Surface Foaming of Polymers Induced by Graphene via Near-Infrared Pulsed Laser

Highly efficient solar photocatalytic degradation of a textile dye by TiO2/graphene quantum dots nanocomposite

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