Structural and Optical Properties of BaO Nanoparticles Synthesized by Facile Co-precipitation Method

Ansari, Manauwar Ali; Jahan, N.

doi:10.2991/mathi.k.210226.001

Cited by 67 publications

(36 citation statements)

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“…Bare BaO (Figure a) shows 19.0, 26.91, 33.3, 44.5, and 54.1° degrees attributed to the (1 2 0), (1 0 1), (1 1 0), (1 0 3), and (2 1 1) planes, respectively, indicating the body-centered structure . In addition, other peaks at 23.9, 28.72, 31.8, 34.7, 38.6, and 66.44° degrees were attributed to the (2 0 1), (1 0 2), (2 0 0), (2 1 2), (1 1 1), (2 0 0), and (4 0 0) planes, respectively, confirming the tetragonal phase of BaO nanoparticles . It is understood from these results that BaO synthesized by a simple chemical precipitation method can be obtained in different phases.…”

Section: Resultsmentioning

confidence: 95%

“…For example, Hussain and co-workers (2019) have synthesized the BaO/TiO 2 with a simple chemical reduction method where the band gap of BaO-based binary BaO/TiO 2 has been obtained as 3.2 eV. On the other hand, Ansari and Jahan (2021) synthesized BaO particles with a chemical precipitation method with a 4.4 eV band gap value. Unlike BaO, NiO was synthesized as binary composites and used in photocatalytic degradation studies.…”

Section: Introductionmentioning

confidence: 99%

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Ternary V-Scheme Ag₂WO₄/BaO/NiO Heterojunction Photocatalysts: Very Fast Degradation Process for Congo Red under UV-Light Irradiation

2023

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With increasing industrial production, pollutants generated in the process of bleaching or dying disperse to the natural water medium. Therefore, an effective photocatalytic material must be prepared for water treatment quickly. In the present study, a novel and effective V-scheme Ag 2 WO 4 /BaO/NiO heterostructure photocatalyst with high photocatalytic performance for the degradation of different organic pollutants was designed and formed by a simple precipitation method. Scanning electron microscopy images showed that BaO, NiO, and Ag 2 WO 4 /BaO/NiO have a nanopipe, spherical, and nanorod morphology, respectively. X-ray diffraction results indicated that cubic phases were obtained with higher crystallite structure and lower crystallite distortion. The optical properties of the samples exhibited UV-absorption regions with about 3.35, 3.38, and 3.28 eV band gaps for BaO, BaO/NiO, and Ag 2 WO 4 /BaO/NiO, respectively. The photocatalytic activity was investigated by the degradation of Congo red under UV-light irradiation. To investigate the photocatalytic mechanism, the photodegradation performance of the catalyst was analyzed with different scavengers such as isopropyl alcohol, ascorbic acid, and potassium iodide (KI), and it was shown that the main active species were • O 2 − radicals and that OH • radicals have a significant contribution toward the degradation process. Compared to bare BaO and BaO/NiO samples, Ag 2 WO 4 /BaO/NiO showed excellent photocatalytic activity and about 41%, 66 and 99% of Congo red photodegraded under UV light within 30 min. The reason for this is that the Ag 2 WO 4 /BaO/NiO heterostructure displayed wider contact which promoted more charge-transfer ways to shorten the electron transportation path and increase the inhibition of electron−hole pairs.

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Ternary V-Scheme Ag₂WO₄/BaO/NiO Heterojunction Photocatalysts: Very Fast Degradation Process for Congo Red under UV-Light Irradiation

2023

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“…Moreover, today, scientists and engineers are working on the fabrication and development of PEH systems based on the movement of the human body or muscles, which includes electroartificial skin, human health monitoring patch, e-textiles, piezoshoe, piezoelectric-based dancing floor, etc. [139][140][141][142][143][144][145][146][147][148][149][150][151][152][153][154][155] These are based on human body activities such as running, walking, dancing, and breathing, which create vibrations and ultimately…”

Section: Applicationsmentioning

confidence: 99%

“…Moreover, today, scientists and engineers are working on the fabrication and development of PEH systems based on the movement of the human body or muscles, which includes electroartificial skin, human health monitoring patch, e‐textiles, piezoshoe, piezoelectric‐based dancing floor, etc. [ 139–155 ] These are based on human body activities such as running, walking, dancing, and breathing, which create vibrations and ultimately generate power to power miniature electronic systems and devices. The production of piezoelectric systems from lightweight polymeric foam‐based systems has become crucial and is gaining commercial importance.…”

Section: Applicationsmentioning

confidence: 99%

Piezoelectric Polymeric Foams as Flexible Energy Harvesters: A Review

Ansari

Somdee

2022

Adv Energy and Sustain Res

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Piezoelectric energy harvesters (PEHs) have the potential to power low‐power electronic devices and can advance, self‐powered, autonomous electronics to the next level. Conventional ceramic‐based piezoelectrics have various properties such as fragility, rigidity, toxicity, high density, and lack of design flexibility which limit their use in more flexible environments. A ton of research has been carried out and published on novel piezomaterials, their transduction mechanisms, analytical models, and electrical circuits to improve various aspects of PEHs. Among these materials, studies on polymeric cellular (or foamed) ferroelectrets or piezoelectrets as PEHs have grown significantly since their discovery. Also, very limited or short reviews are available covering only few aspects. There is a necessity of recognizing their past and present advances in their various generation technology and polymer systems. Herein, a broader review of almost all conventional and recent polymeric foam‐based piezoelectrics for PEH applications is summarized. These cellular polymer piezoelectric systems either in bulk, composite, layered, or film form can be fabricated, and depending on the application and conditions, different polymers groups, mainly, polyolefins, polyester, fluoropolymer, and others, are considered. Their applications and future perspectives are also presented and discussed.

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“…[1][2][3] As a result, polymer composite is one of the options to boost thermal conductivity of polymers. Many high thermally conductive fillers, such as metals, [4][5][6][7][8] ceramics, [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] nanophase material, [26][27][28][29][30][31][32][33] and others, can be included in polymer-matrices for this purpose. However, many fields of engineering are interested in polymer composites filled with conductive metal particles.…”

Section: Introductionmentioning

confidence: 99%

Thermo‐mechanical properties of flexible and rigid polyurethane (PU)/Cu composites

2022

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In this article, flexible and rigid polyurethane (PU)/copper (Cu) composites are prepared via a simple and cost-effective solution casting process. The filler dispersion and chemical bonding of composites are investigated by SEM and FTIR techniques. The results showed the homogeneous dispersion of Cu microparticles. Furthermore, thermal properties are investigated using DMA, DSC, and thermal conductivity measurements. The maximum improvement in thermal conductivity for flexible and rigid PU composites is 24%, and 48%, respectively, as compared to their pure counterparts. The obtained thermal conductivity values are also compared and analyzed with the mechanical property model (Corans and Patel model) and found in good agreement with the output of the model. DMA results showed enhancement in the storage modulus with filler loading while the DSC results revealed the endothermic temperature did not significantly change with adding Cu filler in both flexible and rigid PU matrices. The mechanical properties of composites were studied using tensile and hardness (Shore A and Shore D) test. For flexible PU composites an improvement in tensile strength (43%), Young's modulus (111%), Shore A hardness (6%), Shore D hardness (27%) as compared to pure flexible PU. For rigid PU composites a reduction in tensile strength (23%), Young's modulus (32%), and an increase in Shore A hardness (3%), Shore D hardness (5%) as compared to pure rigid PU. As a result of the current study, TC of rigid PU is found doubly enhanced compared to flexible PU at the same filler concentration. Copper microparticles can act as active filler in both flexible and rigid PU matrices.

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Structural and Optical Properties of BaO Nanoparticles Synthesized by Facile Co-precipitation Method

Cited by 67 publications

References 0 publications

Ternary V-Scheme Ag₂WO₄/BaO/NiO Heterojunction Photocatalysts: Very Fast Degradation Process for Congo Red under UV-Light Irradiation

Ternary V-Scheme Ag₂WO₄/BaO/NiO Heterojunction Photocatalysts: Very Fast Degradation Process for Congo Red under UV-Light Irradiation

Piezoelectric Polymeric Foams as Flexible Energy Harvesters: A Review

Thermo‐mechanical properties of flexible and rigid polyurethane (PU)/Cu composites

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Structural and Optical Properties of BaO Nanoparticles Synthesized by Facile Co-precipitation Method

Cited by 67 publications

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Ternary V-Scheme Ag2WO4/BaO/NiO Heterojunction Photocatalysts: Very Fast Degradation Process for Congo Red under UV-Light Irradiation

Ternary V-Scheme Ag2WO4/BaO/NiO Heterojunction Photocatalysts: Very Fast Degradation Process for Congo Red under UV-Light Irradiation

Piezoelectric Polymeric Foams as Flexible Energy Harvesters: A Review

Thermo‐mechanical properties of flexible and rigid polyurethane (PU)/Cu composites

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Product

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Ternary V-Scheme Ag₂WO₄/BaO/NiO Heterojunction Photocatalysts: Very Fast Degradation Process for Congo Red under UV-Light Irradiation

Ternary V-Scheme Ag₂WO₄/BaO/NiO Heterojunction Photocatalysts: Very Fast Degradation Process for Congo Red under UV-Light Irradiation