Enhanced piezoelectric response using TiO2/MoS2 heterostructure nanofillers in PVDF based nanogenerators

Bhatt, Abhinav; Singh, Vishal; Bamola, Priyanka; Aswal, Deepali; Rawat, Saurabh; Rana, Shilpa; Dwivedi, Charu; Singh, Bharti; Sharma, Himani

doi:10.1016/j.jallcom.2023.170664

Cited by 17 publications

(3 citation statements)

References 56 publications

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“…To our knowledge, few studies on polymeric composites made of TiO2 and MoS2 have been reported in the literature, and only one work is about the use of combined TiO2, MoS2, and PMMA for photocatalytic application [29][30][31]. However, in our case, the studied nanocomposites are obtained using the simple method of solution casting, which is more appropriate for large-scale applications.…”

Section: Preparation Methodsmentioning

confidence: 95%

TiO2—MoS2—PMMA Nanocomposites for an Efficient Water Remediation

Spanò,

Cantarella,

Zimbone

et al. 2024

Polymers

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An improvement of water supply and sanitation and better management of water resources, especially in terms of water reuse, is one of the priorities of the European Green Deal. In this context, it is crucial to find new strategies to recycle wastewater efficiently in a low-cost and eco-friendly manner. The immobilization of inorganic nanomaterials on polymeric matrices has been drawing a lot of attention in recent years due to the extraordinary properties characterizing the as-obtained nanocomposites. The hybrid materials, indeed, combine the properties of the polymers, such as flexibility, low cost, mechanical stability, high durability, and ease of availability, with the properties of the inorganic counterpart. In particular, if the inorganic fillers are nanostructured photocatalysts, the materials will be able to utilize the energy delivered by light to catalyze chemical reactions for efficient wastewater treatment. Additionally, with the anchoring of the nanomaterials to the polymers, the dispersion of the nanomaterials in the environment is prevented, thus overcoming one of the main limits that impede the application of nanostructured photocatalysts on a large scale. In this work, we will present nanocomposites made of polymers, i.e., polymethyl methacrylate (PMMA), and photocatalytic semiconductors, i.e., TiO2 nanoparticles (Evonik). MoS2 nanoflakes were also added as co-catalysts to improve the photocatalytic performance of the TiO2. The hybrid materials were prepared using the sonication and solution casting method. The nanocomposites were deeply characterized, and their remarkable photocatalytic abilities were evaluated by the degradation of two common water pollutants: methyl orange and diclofenac. The relevance of the obtained results will be discussed, opening the route for the application of these materials in photocatalysis and especially for novel wastewater remediation.

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Section: Preparation Methodsmentioning

confidence: 95%

TiO2—MoS2—PMMA Nanocomposites for an Efficient Water Remediation

Spanò,

Cantarella,

Zimbone

et al. 2024

Polymers

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“…Broadband photodetector (PD) applications such as imaging sensors, remote temperature monitoring, and environmental detection are critical components of optoelectronic systems [1][2][3][4][5]. Thanks to the advent of two-dimensional (2D) materials with unique properties including graphene (Gr) and transition metal dichalcogenides (TMDC), versatile optoelectronic devices offering promising potential have quickly established themselves as exciting building blocks [6][7][8][9][10][11]. In particular, 2D materials have been introduced as promising candidates for broadband PD due to their high light absorption and high electron mobility [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Self-powered semitransparent WS₂/LaVO₃ vertical-heterostructure photodetectors by employing interfacial hexagonal boron nitride

Kim,

Shin,

Lee

2024

Nanotechnology

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Two-dimensional (2D) semiconductor and LaVO3 materials with high absorption coefficients in the visible light region are attractive structures for high-performance photodetector (PD) applications. Insulating 2D hexagonal boron nitride (h-BN) with a large band gap and excellent transmittance is a very attractive material as an interface between 2D/semiconductor heterostructures. We first introduce WS2/h-BN/LaVO3 PD. The photo-current/dark current ratio of the device exhibits a delta-function characteristic of 4 x 105 at 0 V, meaning "self-powered". The WS2/h-BN/LaVO3 PD shows up to 0.27 AW-1 responsivity (R) and 4.6 x 1010 cm Hz1/2 W-1 detectivity (D*) at 730 nm. Especially, it was confirmed that the D* performance improved by about 5 times compared to the WS2/LaVO3 device at zero bias. Additionally, it is suggested that the PD maintains 87 % of its initial R for 2000 h under an atmosphere with a temperature of 25°C and humidity of 30 %. Based on the above results, we suggest that the WS2/h-BN/LaVO3 heterojunction is promising as a self-powered optoelectronic device.

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“…Currently, the performance modulation of PVDF piezoelectric lms primarily relies on material modi cation methods [38][39][40][41] , such as adding nano llers (NaNbO 3 and RGO) 42 , doping MXene and BaTiO 3 7 , or preparing PVDF/ZnO nano bers 43 . These methods involve extended development cycles, offer limited exibility in performance regulation, and entail complex fabrication processes 44,45 .…”

Section: Introductionmentioning

confidence: 99%

Kirigami-Inspired, Three-Dimensional Piezoelectric Pressure Sensors Assembled by Compressive Buckling

Liu,

Zhang,

Jia

et al. 2023

Preprint

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Piezoelectric sensors whose sensing performances can be flexibly regulated hold significant promise for efficient signal-acquisition applications in the healthcare field. The existing methods for regulating the properties of polyvinylidene fluoride (PVDF) films mainly include material modification and structural design. Compared to material modification, which has a long test period and an unstable preparation process, structural design is a more efficient method. The Kirigami structure combined with compressive buckling can endow the flexible film with rich macrostructural features. Here, a method is fabricated to modulate the sensing performance by employing distinct 3D structures and encapsulation materials with varying Young’s moduli. The relationship among the aspect ratio (α), pattern factor (η), elastic modulus of encapsulation materials, and equivalent stiffness is obtained by finite element simulation, which provides theoretical guidance for the design of the 2D precursor and the selection of encapsulation materials. In the demonstration applications, the sensor accurately captures pulse waveforms in multiple parts of the human body and is employed for the pressure monitoring of different parts of the sole under various posture states. This method of structure design is efficient, and the preparation process is convenient, providing a new strategy for the performance control of piezoelectric pressure sensors.

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Enhanced piezoelectric response using TiO2/MoS2 heterostructure nanofillers in PVDF based nanogenerators

Cited by 17 publications

References 56 publications

TiO2—MoS2—PMMA Nanocomposites for an Efficient Water Remediation

TiO2—MoS2—PMMA Nanocomposites for an Efficient Water Remediation

Self-powered semitransparent WS₂/LaVO₃ vertical-heterostructure photodetectors by employing interfacial hexagonal boron nitride

Kirigami-Inspired, Three-Dimensional Piezoelectric Pressure Sensors Assembled by Compressive Buckling

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Enhanced piezoelectric response using TiO2/MoS2 heterostructure nanofillers in PVDF based nanogenerators

Cited by 17 publications

References 56 publications

TiO2—MoS2—PMMA Nanocomposites for an Efficient Water Remediation

TiO2—MoS2—PMMA Nanocomposites for an Efficient Water Remediation

Self-powered semitransparent WS2/LaVO3 vertical-heterostructure photodetectors by employing interfacial hexagonal boron nitride

Kirigami-Inspired, Three-Dimensional Piezoelectric Pressure Sensors Assembled by Compressive Buckling

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Self-powered semitransparent WS₂/LaVO₃ vertical-heterostructure photodetectors by employing interfacial hexagonal boron nitride