Ti3C2 Mxene/porous g-C3N4 interfacial Schottky junction for boosting spatial charge separation in photocatalytic H2O2 production

Yang, Yang; Zeng, Zhuotong; Zeng, Guangming; Huang, Danlian; Xiao, Rong; Zhang, Chen; Zhou, Chengyun; Xiong, Weiping; Wang, Wenjun; Cheng, Min; Xue, Wenjing; Guo, Hai; Tang, Xiang; He, Danping

doi:10.1016/j.apcatb.2019.117956

Cited by 513 publications

(180 citation statements)

References 64 publications

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“…Their derivatives, such as GO, RGO, and SGO, are more compatible with other materials and are easy to integrate in various applications . The structure of graphene materials, for example, graphene flakes and 3D stacking graphene, is important for the enhancement of thermal conductivity, especially through blending with other materials …”

Section: Carbon Allotrope Materials In Tims Applicationmentioning

confidence: 99%

“…99 The structure of graphene materials, for example, graphene flakes and 3D stacking graphene, is important for the enhancement of thermal conductivity, especially through blending with other materials. 98,[100][101][102][103][104] A series of studies investigated paper-based TIMs with cellulose in composite with functionalized graphene. Song et al integrated nanofibrillated cellulose and graphene nanosheets for thermal management.…”

Section: Graphenementioning

confidence: 99%

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Allotrope carbon materials in thermal interface materials and fuel cell applications: A review

2019

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Summary The performance of allotrope carbon materials has been explored because of their superior properties in energy system applications. This review provides an understanding of the current work focusing on the applications of selected carbon materials in important energy systems, focus on thermal interface materials (TIMs), and fuel cell applications. This article begins with the introduction of TIMs and fuel cell in general working principle and presents details on carbon materials. The discussion focuses on updates from the latest research work and addresses current challenges and opportunities for research toward TIMs and fuel cell applications. The optimum performance of TIMs was seen when thermal conductivity achieved at a maximum of 3000 W (m K)−1 by using vertically aligned carbon nanotubes (CNTs) and a minimum internal thermal resistance of 0.3 mm2 K W−1. Meanwhile for fuel cell, the platinum/CNTs catalyst applied proton exchange membrane fuel cell achieved high power density of 661 mW cm−2 in the presence of Nafion electrolyte membrane. This review provides insights for scientists about the use of carbon materials, especially in energy system applications.

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Section: Carbon Allotrope Materials In Tims Applicationmentioning

confidence: 99%

Section: Graphenementioning

confidence: 99%

Allotrope carbon materials in thermal interface materials and fuel cell applications: A review

2019

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“…After the coupling of SnO 2 with MgSn(OH) 6 , a clear enhancement of the photocurrent response was observed, which suggested that the electric field at the interface of the heterojunction could accelerate the movement of carriers and greatly promote separation of the photoinduced electrons and holes. Additionally, EIS was conducted to understand the carrier transfer resistance using the arc radius [34]. Nyquist plots with smaller arc radii indicate a low impedance and a high carrier transfer efficiency.…”

Section: Resultsmentioning

confidence: 99%

In Situ Construction of a MgSn(OH)6 Perovskite/SnO2 Type-II Heterojunction: A Highly Efficient Photocatalyst towards Photodegradation of Tetracycline

Tian

Wang

et al. 2019

Nanomaterials

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Using solar energy to remove antibiotics from aqueous environments via photocatalysis is highly desirable. In this work, a novel type-II heterojunction photocatalyst, MgSn(OH)6/SnO2, was successfully prepared via a facile one-pot in situ hydrothermal method at 220 °C for 24 h. The obtained heterojunctions were characterized via powder X-ray diffraction, Fourier-transform infrared spectroscopy, transmission electron microscopy, and ultraviolet-visible diffuse reflectance spectroscopy. The photocatalytic performance was evaluated for photodegradation of tetracycline solution under ultraviolet irradiation. The initial concentration of tetracycline solution was set to be 20 mg/L. The prepared heterojunctions exhibited superior photocatalytic activity compared with the parent MgSn(OH)6 and SnO2 compounds. Among them, the obtained MgSn(OH)6/SnO2 heterojunction with MgCl2·6H2O:SnCl4·5H2O = 4:5.2 (mmol) displayed the highest photocatalytic performance and the photodegradation efficiency conversion of 91% could be reached after 60 min under ultraviolet irradiation. The prepared heterojunction maintained its performance after four successive cycles of use. Active species trapping experiments demonstrated that holes were the dominant active species. Hydroxyl radicals and superoxide ions had minor effects on the photocatalytic oxidation of tetracycline. Photoelectrochemical measurements were used to investigate the photocatalytic mechanism. The enhancement of photocatalytic activity could be assigned to the formation of a type-II junction photocatalytic system, which was beneficial for efficient transfer and separation of photogenerated electrons and holes. This research provides an in situ growth strategy for the design of highly efficient photocatalysts for environmental restoration.

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“…It is well known that UV light can be used for surface activation purposes [9,7,[10][11][12][13][14]. In this process, the high energy UV photons break up chemical bonds at the surface.…”

Section: Introductionmentioning

confidence: 99%

Surface modification of polytetrafluoroethylene thin films by non-coherent UV light and water treatment for electrowetting applications

López

Cedeño-Mata

Domínguez-Pumar

et al. 2020

Progress in Organic Coatings

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The electrowetting on dielectric or EWOD phenomenon is used in a wide range of applications, such as Liquid Lenses, Lab-on-Chip devices, or EWOD displays, among others. Its chemical resistance, electrical stability, ease of application, and low cost make polytetrafluoroethylene (PTFE) the preferred hydrophobic dielectric layer for such applications. However, the hydrophobic behaviour represents a challenge for spin coating other layers over its surface. As a consequence, several techniques are implemented to modify the surface of PTFE. These methods are complex, time-consuming, and produce morphology changes over the surface that are difficult and sometimes impossible to recover. In this work, we propose a new surface modification method that is based on a non-coherent UV light exposition method and a specific water treatment, that lead to a change from hydrophobic to hydrophilic, and a perfect recovery from hydrophilic to hydrophobic behaviour. Experiments: In this work, the fabrication of the hydrophobic layer treatment starts with the creation of a thin layer of alumina (Al O 2 3) over a glass substrate using an atomic layer deposition technique (ALD). A mixture of 10:1 FC40 solvent and Teflon Dupont AF1600 was coated over the alumina layer. The Teflon film was exposed to UV light produced by a low-pressure mercury (Hg) lamp for a period that ranges from 3−6 min. The results were analysed by scanning electron microscopy, x-ray spectroscopy, and static deionized water contact angle measurements. Findings: Contact angles dependent on UV light exposure time were observed. From the scanning electron microscopy analysis, it was confirmed that the UV treatment does not produce morphology changes over the surface. Nevertheless, the x-ray spectroscopy revealed that the UV exposed samples react when they are brought into contact with deionized water, improving the adhesion of the surface. The original hydrophobic behaviour of the surface is recovered (up to 98 %) after 3 h of thermal treatment. Furthermore, the thermal recovery analysis reveals a correlation between the recovery percentage and the applied temperature.

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Ti3C2 Mxene/porous g-C3N4 interfacial Schottky junction for boosting spatial charge separation in photocatalytic H2O2 production

Cited by 513 publications

References 64 publications

Allotrope carbon materials in thermal interface materials and fuel cell applications: A review

Allotrope carbon materials in thermal interface materials and fuel cell applications: A review

In Situ Construction of a MgSn(OH)6 Perovskite/SnO2 Type-II Heterojunction: A Highly Efficient Photocatalyst towards Photodegradation of Tetracycline

Surface modification of polytetrafluoroethylene thin films by non-coherent UV light and water treatment for electrowetting applications

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