Synthesis of Wo3 Nanorods and Their Photocatalytic Degradation of Organic Contaminants

Jeyapaul, T.; Prakash, K.; Harikengaram, S.; Chellamani, Arunachalam; Selvam, V.

doi:10.31788/rjc.2018.1143076

Cited by 7 publications

(4 citation statements)

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“…The morphology of a nanoparticle can be optimized via different dimensions such as 0D, 1D, 2D, and 3D. Over the past few years, a number of methods have emerged to synthesize different morphologies of WO 3 nanomaterials to utilize in various applications such as nano-quantum dots (0D; formaldehyde gas sensing) [30], nanorods (1D; degradation of organic pollutants) [31], nanoplates (2D; gaseous acetaldehyde degradation) [32], flowers (3D; photo-oxidation of m-xylene) [33], etc. Tungsten trioxide 3D hierarchical architectures are generally composed by assemblies of nanorods, nanosheets, or nanoplates to form highly ordered nano or microstructures [28].…”

Section: Introductionmentioning

confidence: 99%

Morphology-Controlled WO3 for the Photocatalytic Oxidation of Methane to Methanol in Mild Conditions

Premachandra

Heagy

2023

Methane

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Since WO3 is a relatively abundant metal oxide and features the ability to absorb in the visible spectrum, this non-toxic semiconductor is a promising photocatalyst among sustainable materials. These properties have delivered intriguing catalytic results in the conversion of methane to methanol; however, initial investigations indicate low photocatalytic efficiency resulting from fast recombination of photogenerated charges. To explore this aspect of inefficiency, five different morphologies of WO3 consisting of micron, nanopowder, rods, wires, and flowers were obtained and characterized. In addition, several electron capture agents/oxidizers were investigated as a means of improving the separation of photogenerated charges. The photocatalytic activity of different morphologies was assessed via CH3OH formation rates. Based on our results, WO3 flowers produced the highest methanol productivity (38.17 ± 3.24 µmol/g-h) when 2 mM H2O2 was present, which is approximately four times higher in the absence of H2O2. This higher methanol production has been attributed to the unique structure-related properties of the flower-like structure. Photoluminescence emission spectra and diffuse reflectance data reveal that flower structures are highly catalytic due to their reduced electron/hole recombination and multiple light reflections via petal-like hollow chambers.

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Section: Introductionmentioning

confidence: 99%

Morphology-Controlled WO3 for the Photocatalytic Oxidation of Methane to Methanol in Mild Conditions

Premachandra

Heagy

2023

Methane

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“…The process of dyes photodegradation could be said as a complicated process that cannot be only viewed from one perspective, but it should be observed from all perspectives, i.e. particle size, morphology, and phase/ chemical composition of photocatalysts [16][17][18][19][20] . In this study, the photoactivity of doped TiO 2 was influenced by two factors, i.e.…”

Section: Resultsmentioning

confidence: 99%

Preparation of S-Doped Tio2 via Sol-Gel/ Hydrothermal Method and Its Activity as Photodegradation of Rb05

Adiansyah¹,

Purba²,

Tarigan³

et al. 2020

RJC

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“…The emission at 412 nm may be allocated to the recombination of free excitons and is denoted as near band edge emission. The peak located at 459 nm suggesting that the electron hole pair separation rapidly, which may facilitate the electron transfer efficiency [28]. The blue emission at 490 nm can be assigned to oxygen vacancies associated with defect level in the band gap for its electron transition [29].…”

Section: Optical Studiesmentioning

confidence: 98%

High sensitive room temperature ammonia sensor based on dopant free m-WO3 nanoparticles: Effect of calcination temperature

Duraisami¹,

Parasuraman²

2020

Nanosystems: Phys. Chem. Math.

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In this article, monoclinic tungsten tri-oxide (m-WO 3) nanoparticles (hereafter NPs) were prepared by facile precipitation method and they were successfully examined as gas sensing materials for monitoring gaseous ammonia at room temperature have been reported. The effect of calcination temperature on structural and morphological properties of the prepared samples were also investigated. Physicochemical properties of the samples were characterized by XRD, SEM, XPS, UV-Vis and PL analysis. XRD studies confirmed the monoclinic structure of the prepared NPs. Optical studies disclosed that the obtained samples were having wider optical band gaps ranging from 2.48 to 2.76 eV. Sensing signatures such as selectivity, transient response along with performance indicators like repeatability and stability have also been investigated. Invitingly, the sample calcined at 823 K exhibited highly improved sensing response of 142 towards 200 ppm of ammonia with rapid response/recovery time of 26 / 79 s.

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Synthesis of Wo3 Nanorods and Their Photocatalytic Degradation of Organic Contaminants

Cited by 7 publications

References 0 publications

Morphology-Controlled WO3 for the Photocatalytic Oxidation of Methane to Methanol in Mild Conditions

Morphology-Controlled WO3 for the Photocatalytic Oxidation of Methane to Methanol in Mild Conditions

Preparation of S-Doped Tio2 via Sol-Gel/ Hydrothermal Method and Its Activity as Photodegradation of Rb05

High sensitive room temperature ammonia sensor based on dopant free m-WO3 nanoparticles: Effect of calcination temperature

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