Structural and electrical properties of bismuth sodium titanate ceramic

Kuanar, Bijayalaxmi; Mohanty, Hari Sankar; Dalai, Biswajit; Behera, D.

doi:10.1088/1757-899x/1258/1/012007

Cited by 4 publications

(2 citation statements)

References 19 publications

(16 reference statements)

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“…Peaks at 1412.4 1 and 1415.3 cm –1 in NBT/rGO and NBT/WrGO nanocomposites, respectively, arise to the C–OH stretching vibrations of rGO. The Bi–O stretching vibration at 643.1 cm –1 in the case the of bare NBT shifts to 632.7 and 641.3 cm –1 for the NBT/rGO and NBT/WrGO nanocomposites, respectively, owing to the strong interaction of NBT with rGO. , The Ti–O stretching band for NBT centered at 454.4 cm –1 significantly shifts to 428.8 and 440.2 cm –1 in the case of NBT/rGO and NBT/WrGO nanocomposites on account of the strong interaction of NBT with rGO …”

Section: Resultsmentioning

confidence: 95%

Construction of a 3D/2D Z-Scheme Heterojunction for Promoting Charge Separation and Augmented Photocatalytic Hydrogen Evolution

Samajdar,

Ghosh,

Thandavarayan

et al. 2023

Energy Fuels

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Fabrication of multidimensional heterogeneous photocatalysts combining two-dimensional (2D) and three-dimensional (3D) nanostructures is crucial for efficient solar energy conversion at the 3D/2D interface. Herein, a direct Z-scheme heterostructure has been developed by modification of the wide band gap Na0.5Bi0.5TiO3 (NBT, 3.10 eV) with graphene nanosheets via a facile hydrothermal method which demonstrated a 14-fold increase in H2 generation (∼100 mmol h–1 g–1) with an apparent quantum yield of 6.3% compared to pure NBT (∼7 mmol h–1 g–1) under visible light. The photoelectrochemical measurements reveal that the NBT/reduced graphene oxide exhibits ∼32 times enhancement in photocurrent density due to a significant increase in the charge-carrier concentration (1.8 × 1017 cm–3) of the heterostructure as compared to bare NBT (3.4 × 1016 cm–3). Remarkably, the formation of a direct Z-scheme heterojunction at the interface of graphene and NBT induces an in-built electric field and facilitates the vectorial transfer of the photogenerated charge carriers, which improves the rate of H2 generation without using noble metal-based cocatalysts. Moreover, waste-derived NBT/reduced graphene oxide from the graphite powder reclaimed from spent Li-ion batteries shows excellent photocatalysis performance comparable to natural resources. This suggests the potential for large-scale photocatalysts production from waste-derived carbon source for solar fuel generation.

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Section: Resultsmentioning

confidence: 95%

Construction of a 3D/2D Z-Scheme Heterojunction for Promoting Charge Separation and Augmented Photocatalytic Hydrogen Evolution

Samajdar,

Ghosh,

Thandavarayan

et al. 2023

Energy Fuels

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“…In continuation to our earlier review on perovskite materials (1) and extraction of thorium (2), we have reported here the various synthesis routes of graphene and graphene oxide with their characteristics and applications. Graphene is a hexagonal planner carbon ring which is derived from 3D massive covalent structured graphite.…”

Section: Introductionmentioning

confidence: 89%

Synthesis, Characteristics and Applications of Graphene Composites: A Survey

DALAİ,

PATRA,

DAS

et al. 2023

Journal of the Turkish Chemical Society Section A: Chemistry

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Graphene is the name for a monolayer sheet of carbon atoms that are bonded together in a repeating pattern of hexagons. This sheet is only one atom thick. Monolayers of graphene stacked on top of each other. In this article, we have compared the characterization results of graphene and graphene oxide along with synthesis via different methods. A sigma bond connects each atom in a graphene sheet to its three closest neighbours and each atom also contributes one electron to a conduction band that covers the entire graphene sheet. Graphene when oxidized is called graphene oxide (GO) and is mostly used in photoelectric, materialistic, catalyst and energy fields due to its thermal, electrical and mechanical characteristics. It is also used in the field of medical science, drug delivery and biomedical applications. Graphene have been improved due to import of 3D printing technology. In last few years, graphene has taken the attention of most material science researchers due to its various applications. Graphene based polymers and nanocomposites are widely used in sensors, optoelectronics, magneto transport, automotive, biosensors, electronics and aerospace fields.

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