Shape‐Tunable Selective Synthesis of Bismuth Fluoride Nanostructures for Versatile Applications

Abstract

pacitors, and sensors due to the enhanced properties arising from the nanobuilding blocks and the way they are arranged. [2] Hollow hierarchical and porous microand nanostructures have attracted significant attention because of their interesting features, like low densities, large interior spaces, high specific surface areas with a broad range of potential applications in the fields of water treatment, energy conversion, gas sensing, catalysis, and drug delivery. [3] Similarly, synthesis of cube-like morphology also gained importance due to its structure and crystal facet exposure which helps in improving the properties such as gas sensing and catalysis. [4] The rare-earth ions doped micro/nanoparticles have enticed researchers because of their broad range of applications in solid-state light-emitting diodes and other optoelectronic devices. [5] In conjunction with the utilization in illumination devices, they are also used as fluorescent labels in biological applications. [6] Among different rare-earth doped materials, fluoride micro/nanoparticles have got more significant importance compared to other materials like oxides, carbonates, vanadates, and garnets, owing to their unique optical properties. [7] The materials show low toxicity, high photochemical stability, and long lifetime. Moreover, fluoride-based materials have low phonon energy (<350 cm −1 ) which reduces the nonradiative relaxation and are expected to improve the quantum efficiency. [8] Although there are lots of reports on rare-earthbased (Y, Ln) fluoride materials, when the rare-earth cations are replaced with Bi 3+ ions, they become more beneficial in economic viewpoint because of their ease of availability, good purification, and low cost, as compared with the rare-earths. Despite many advantages, like their use as cathode materials for batteries and photocatalysis, few reports were found about bismuth-based fluoride materials. [9] Zhao et al. reported the size and shape controlled synthesis of BiF 3 through solvent extraction route. [10] Likewise, Sarkar et al. reported the Ln 3+ doped BiF 3 nanoparticles enclosed in polymer matrix and explained the importance of poly (vinyl pyrrolidine) in reducing the size of the particle. The upconversion and downconversion optical properties were also studied by doping Yb 3+ /Er 3+ and Eu 3+ , respectively. [11] In addition, Escudero et al. reported the BiF 3 synthesis of quasispheres, and the spheres were of few µm size. [12] Recently, Feng et al. demonstrated the photocatalytic activity of BiF 3 particles under visible light illumination. [13] To the best of our knowledge, there were no reports found on the A facile approach for shape-tunable synthesis of bismuth fluoride nanoparticles is reported. The approach is based on the homogeneous precipitation of precursor materials in mixed solvents (H 2 O and ethylene glycol) and only ethylene glycol. The influencing factors on the morphology of the particles, i.e., solvent ratio, F/Bi ratio, and ethylenediaminetetraacetic acid, are studied in detail, a...

Structural and electrochemical properties of mesoporous FeVO 4 as a negative electrode for lithium‐ion battery

“…As well, EDTA chelating agent plays a significant role as a structure-guiding agent to create improved morphologies. 21 The beneficial elements as well as excellent capping skill, robust chelating capacity, and beneficial structure changeability of EDTA are mostly ascribed to the presence of quartet carboxyl groups (ÀCOOH) and a separate electron couple placed on every nitrogen atom. 22 Therefore, enough quantity of EDTA was provided into the growth mixture comprising iron and vanadium to change the surface morphology of the product.…”

“…At last, the precursor releases crystalline H 2 O and recrystallizes by post‐calcination in the furnace to form MFVO NSs. The below equation depicts the reaction mechanism: As well, EDTA chelating agent plays a significant role as a structure‐guiding agent to create improved morphologies 21 . The beneficial elements as well as excellent capping skill, robust chelating capacity, and beneficial structure changeability of EDTA are mostly ascribed to the presence of quartet carboxyl groups (−COOH) and a separate electron couple placed on every nitrogen atom 22 .…”

Hierarchically Designed Ag@Ce6Mo10O39 Marigold Flower-Like Architectures: An Efficient Electrode Material for Hybrid Supercapacitors

“…As is wellknown, EDTA plays a significant role as a chelating agent to produce stable complexes with metal atoms and also serves as a structure-directing agent to design various benefit-enriched morphologies. 37 The advantageous aspects including outstanding capping ability, strong chelating capability, and efficient structure tunability of EDTA are mainly attributed to the existence of four carboxyl groups (−COOH) and a single electron pair located on each nitrogen atom. 38 Accordingly, an adequate amount of EDTA was introduced into the growth solution containing cerium nitrate and sodium molybdate (Figure 1a) to tune the surface morphology of the product.…”

“…Initially, CM MFs were synthesized in a single-step process with the aid of EDTA using a hydrothermal method. As is well-known, EDTA plays a significant role as a chelating agent to produce stable complexes with metal atoms and also serves as a structure-directing agent to design various benefit-enriched morphologies . The advantageous aspects including outstanding capping ability, strong chelating capability, and efficient structure tunability of EDTA are mainly attributed to the existence of four carboxyl groups (−COOH) and a single electron pair located on each nitrogen atom .…”

One‐Pot Synthesis of Homogeneous EuF3 Nanoplates: A Near‐Ultraviolet Light‐Induced Red‐Emitting Bifunctional Platform for in vitro Cell Imaging and Solid‐State Lighting

“…On the other hand, Eu 3+ ion has two characteristic emissions bands located in the yellow ( 5 D 0 → 7 F 1 ) and red ( 5 D 0 → 7 F 2 ) regions ,. Specially, the red emission exhibits strong penetration ability in muscular tissue which makes the Eu 3+ ions based nanomaterials were suitable for optical bioimaging ,.…”