WO3 quantum dot: Synthesis, characterization and catalytic activity

Mostafa, Ayman M.; Yousef, Samir A.; Eisa, Wael H.; Ewaida, M. A.; Al-Ashkar, Emad A.

doi:10.1016/j.molstruc.2019.03.007

Cited by 74 publications

(15 citation statements)

References 39 publications

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“…85-2460) and demonstrates the sample crystalline structure. The diffraction angles of 13.82, 22.8, 24.31, 27.88, 36.31, 49.5, 55.04, are ascribed to (100), (002), (110), (200), (202), (302), and (302) planes, respectively 36 . The bare CN catalyst exhibits two well-defined diffraction peaks at 13.04° and 27.40°, corresponding to (100) and (002) diffraction planes, respectively (JCPDS No.…”

Section: Resultsmentioning

confidence: 99%

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Highly efficient photodegradation of raw landfill leachate using cost-effective and optimized g-C3N4/SnO2/WO3 quantum dots under Vis–NIR light

Samadi

Delnavaz

Rashtizadeh

et al. 2022

Sci Rep

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In this study, photodegradation of raw landfill leachate under Vis–NIR irradiation and sunlight has been investigated using optimized g-C3N4/SnO2/WO3 quantum dots as a novel nanocomposite. g-C3N4/SnO2/WO3 QDs was successfully synthesized and characterized using various analyses. The best mixing ratios of the nanocomposite components were obtained by response surface methodology (RSM). The morphology and the surface area characteristics of the photocatalyst were investigated by scanning and transmission electron microscopy (SEM and TEM) and Brunauer, Emmett and Teller (BET) analysis. Results of UV–Visible diffuse reflectance spectroscopy (UV–Vis DRS) and photoluminescence (PL) spectrum revealed that the nanocomposite has a great light absorption capacity and improved separation of charge carriers. Using the optimized nanocomposite with the best mixing ratios of urea, SnO2, and WO3 QDs solution, obtained from the central composite design (CCD), the chemical oxygen demand (COD) of the leachate (4575 mg/L) was reduced by 74% and 47% in 4 h under visible-NIR and sunlight irradiations, respectively. Gas chromatography–mass spectrometry (GC–MS) analysis also revealed that a significant reduction of aromatic compounds of the raw leachate occurred after the photodegradation process with g-C3N4/SnO2/WO3QDs nanocomposite. Moreover, the stability and recyclability of the photocatalyst were evaluated, and it was observed that after five experimental cycles of leachate degradation, no significant loss of nanocomposite performance could be seen. Financial analysis was also performed, and the feasibility of this process was investigated.

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Section: Resultsmentioning

confidence: 99%

“…Structural analysis of the synthesized photocatalysts. 002), ( 110), ( 200), ( 202), (302), and (302) planes, respectively 36 . The bare CN catalyst exhibits two well-defined diffraction peaks at 13.04° and 27.40°, corresponding to (100) and (002) diffraction planes, respectively (JCPDS No.…”

Section: Resultsmentioning

confidence: 99%

Highly efficient photodegradation of raw landfill leachate using cost-effective and optimized g-C3N4/SnO2/WO3 quantum dots under Vis–NIR light

Samadi

Delnavaz

Rashtizadeh

et al. 2022

Sci Rep

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“…17% 4-nitrophenol degradation after 80 min was observed. 357 Bimetallic Pt−Au alloy nanoparticles with varying Pt−Au ratios were produced by Ma and co-workers, using 248 nm, 17 ns pulsed laser ablation of a mixed metal target in water. 358 The nanoparticles had sizes ranging from 2.5 to 50 nm, depending on Pt content, with more Pt resulting in larger particles.…”

Section: Catalysts For 4-nitrophenol and Nitrobenzene Reductionsmentioning

confidence: 99%

“…A pseudo-first-order rate constant of k = 0.000276 min –1 and ca. 17% 4-nitrophenol degradation after 80 min was observed …”

Section: Thermochemical Heterogeneous Catalysismentioning

confidence: 99%

Pulsed Laser in Liquids Made Nanomaterials for Catalysis

et al. 2021

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Catalysis is essential to modern life and has a huge economic impact. The development of new catalysts critically depends on synthetic methods that enable the preparation of tailored nanomaterials. Pulsed laser in liquids synthesis can produce uniform, multicomponent, nonequilibrium nanomaterials with independently and precisely controlled properties, such as size, composition, morphology, defect density, and atomistic structure within the nanoparticle and at its surface. We cover the fundamentals, unique advantages, challenges, and experimental solutions of this powerful technique and review the state-of-the-art of laser-made electrocatalysts for water oxidation, oxygen reduction, hydrogen evolution, nitrogen reduction, carbon dioxide reduction, and organic oxidations, followed by laser-made nanomaterials for light-driven catalytic processes and heterogeneous catalysis of thermochemical processes. We also highlight laser-synthesized nanomaterials for which proposed catalytic applications exist. This review provides a practical guide to how the catalysis community can capitalize on pulsed laser in liquids synthesis to advance catalyst development, by leveraging the synergies of two fields of intensive research.

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“…They also reported that a significant calcination effect on the structural, morphological properties of WO 3 nanoparticles. Mostafa et al (2019) prepared WO 3 thin films with pulsed laser deposition technique using a tungsten tablet of the diameter of 0.85 cm as target material kept in a vessel filled with ultra-pure water. An acoustic optically Q-switched Nd-YAG laser beam of wavelength 1064 nm is used with the laser energy of 60 mJ, the pulse repetition rate of 10 Hz, pulse duration as 7 ns and deposition time is 10 min.…”

Section: Structure Of Womentioning

confidence: 99%

Nanostructured WO₃ based gas sensors: a short review

Sriram

Parne

Vaddadi

et al. 2021

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Purpose This paper aims to focus on the basic principle of WO3 gas sensors to achieve high gas-sensing performance with good stability and repeatability. Metal oxide-based gas sensors are widely used for monitoring toxic gas leakages in the environment, industries and households. For better livelihood and a healthy environment, it is extremely helpful to have sensors with higher accuracy and improved sensing features. Design/methodology/approach In the present review, the authors focus on recent synthesis methods of WO3-based gas sensors to enhance sensing features towards toxic gases. Findings This work has proved that the synthesis method led to provide different morphologies of nanostructured WO3-based material in turn to improve gas sensing performance along with its sensing mechanism. Originality/value In this work, the authors reviewed challenges and possibilities associated with the nanostructured WO3-based gas sensors to trace toxic gases such as ammonia, H2S and NO2 for future research.

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WO3 quantum dot: Synthesis, characterization and catalytic activity

Cited by 74 publications

References 39 publications

Highly efficient photodegradation of raw landfill leachate using cost-effective and optimized g-C3N4/SnO2/WO3 quantum dots under Vis–NIR light

Highly efficient photodegradation of raw landfill leachate using cost-effective and optimized g-C3N4/SnO2/WO3 quantum dots under Vis–NIR light

Pulsed Laser in Liquids Made Nanomaterials for Catalysis

Nanostructured WO₃ based gas sensors: a short review

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WO3 quantum dot: Synthesis, characterization and catalytic activity

Cited by 74 publications

References 39 publications

Highly efficient photodegradation of raw landfill leachate using cost-effective and optimized g-C3N4/SnO2/WO3 quantum dots under Vis–NIR light

Highly efficient photodegradation of raw landfill leachate using cost-effective and optimized g-C3N4/SnO2/WO3 quantum dots under Vis–NIR light

Pulsed Laser in Liquids Made Nanomaterials for Catalysis

Nanostructured WO3 based gas sensors: a short review

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Product

Resources

About

Nanostructured WO₃ based gas sensors: a short review