Visible light-driven photodecomposition system: preparation and application of highly dispersed Pt-loaded WO
            <sub>3</sub>
            microparticles

Wang, Sheng; Wang, Tao; Liu, Yang; Gao, Yanlong; Ding, Yuanwei; Xu, Xuefei; Zhang, Xiaolong

doi:10.1049/mnl.2011.0001

Cited by 8 publications

(9 citation statements)

References 18 publications

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“…[76] Secondly, hybrid materials based on reduced graphene (r-GO) and WO3 or PtWO3 conjugates respectively, were obtained by photodeposition under visible light as previously described. [77] Raman spectroscopy confirmed the generation of the r-GO-based hybrid materials; specifically, peaks around 810 cm -1 and 710 cm -1 which were attributed to the stretching of the O-W-O bonds, as well as peaks at 328 cm -1 and 270 cm -1 which were related to the bending vibration of the W-O-W bonds were noted. [78] Peaks below 200 cm -1 were also observed and were generally associated with the vibrations in the lattice modes of the WO3-based nanoparticles, while the D peak around 1350 cm -1 was related to the disorder induced in the carbon (C) structure by the photoreduction of the r-GO surface.…”

Section: Resultsmentioning

confidence: 70%

Hybrid nanocomposites with enhanced visible light photocatalytic ability for next generation of clean energy systems

Dong

Eldawud

Wagner

et al. 2016

Applied Catalysis A: General

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2 Graphical abstract3 Highlights -Propose to dvance the next generation of heterostructures with high photocatalytic activity -Rely on facile wet chemistry and photoreduction-based synthesis to design and fabricate platinum loaded tungsten trioxide (WO3) nanoparticles/ graphene heterostructures -Evaluated heterostructure morphologies, chemical and physical properties, and their efficiency for stable photocatalysis of model system -Unraveled the fundamental mechanisms, properties and processes that allowed for increased performance, reliability, and competitiveness of such heterostructures -Photocatalysis at such user-formed heterointerfaces related to the available area for reaction and the electron-hole pair recombination rate, all under visible light.4 AbstractHeterogenous photocatalysis is widely used for waste-water treatment and degradation of pollutants and promises to advance the science of alternative materials with visible photo-excitations abilities. However, there are still fundamental material properties and processes that need to be understood in order to increase user-tailored catalytic systems' performance and efficiency, while ensuring their optimized reactivities and large-scale development and implementation.Herein we developed graphene-based hybrid composites to be used as efficient nanocatalysts with increased ability to absorb visible light, that retain high corrosionresistance properties when used in solution, and provide energy levels that match their reduction and oxidation half-reactions. Using both photo-deposition and photoreduction methods, we first created platinum/tungsten trioxide conjugates with physico-chemical characteristics investigated by microscopical and spectroscopical analyses, and further decorated such conjugates onto graphene surfaces to create the hybrids. Our results demonstrate that the synthesized hybrids can degrade a model azo dye and further, show that graphene plays an important role in delaying electron transfer at its interface, with such effect being exploited for possible integration in the next generation of clean energy systems.

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Section: Resultsmentioning

confidence: 70%

Hybrid nanocomposites with enhanced visible light photocatalytic ability for next generation of clean energy systems

Dong

Eldawud

Wagner

et al. 2016

Applied Catalysis A: General

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“…[112,113] Also of interest is the implementation of WO 3 in a Z-scheme for full water splitting. [29,114,115] Recent studies have demonstrated that WO 3 can be loaded through photodeposition with Pt, [29,30,109,111,112,[116][117][118][119][120][121][122][123][124][125][126][127][128][129][130] Pd, [131,132] Ag [18,133] and Au. [130,[134][135][136] In many cases, an increase in photocatalytic activity has been observed.…”

Section: Photodeposition Of Particles On Womentioning

confidence: 99%

“…pH, de-aeration or the presence/absence of a sacrificial agent on for example the oxidation state of Pt or on the photodeposition speed. In most cases a sacrificial agent has been applied, mostly in the form of methanol, [109,112,117,119,[121][122][123][124] although ethanol [124,130] and oxalic acid [136] have been used as well. In some cases, photodeposition took place first without a sacrificial agent, after which methanol was added later.…”

Section: Photodeposition Of Pt On Womentioning

confidence: 99%

“…At lower illumination times, lower activities were observed, likely the result of incomplete Pt photodeposition. Other studies have looked at the optimal wt% of Pt in the photocatalytic degradation of acetic acid (1 wt% [116,123] or 1.5 wt% [122] ), acetaldehyde (0.1 wt% [116] ), isopropyl alcohol (0.5 wt% [116] ) and amaranth (1 wt% [125] ). 0.2 wt% turned out to be optimal for the partial photo-oxidation of cyclohexane [119] and 0.1 wt% for the production of phenol from benzene.…”

Section: Figure 28 Tem Images Of Pt/wo 3 Obtained By Photodepositiomentioning

confidence: 99%

“…In most cases they are on average in the range of 2 to 10 nm, [109,116,117] with the exception of one study where Pt clusters of 30 nm were reported. [122] Indeed, Shiraishi et al found that the Pt particle size was more or less independent of the Pt loading (using methanol as a sacrificial reagent in the photodeposition). [119] They found that at 0.2 wt%, the average Pt particle size was 4.7 nm and at 1.3 wt%, the average Pt particle size was 4.8 nm.…”

Section: Figure 28 Tem Images Of Pt/wo 3 Obtained By Photodepositiomentioning

confidence: 99%

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Photodeposition of platinum nanoparticles on wel-defined tungsten oxide : controlling oxidation state, particle size and geometrical distribution

Wenderich¹

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Chapter 2-Principles, mechanism, and applications of photodeposition in (photo)catalysis 2.1 Introduction to photodeposition 2.2 Photodeposition of particles on TiO 2 2.3 Photodeposition of Ag on ZnO 2.4 Photodeposition of particles on WO 3 2.4.1 Photodeposition of Pt on WO 3 2.4.2 Photodeposition of other metals on WO 3 2.4.3 Photodeposition of Ag/AgX (X = Cl or Br) particles on WO 3 2.4.4 Photodeposition on composite photocatalysts containing WO 3 2.5 Structure-directed photodeposition 2.6 Points for improvement in photodeposition studies 2.6.1 Loading vs. doping 2.6.2 Verification of the valence state of as-deposited particles 2.6.3 Verification of wt loading 2.6.4 Measuring of the photon flux 2.6.5 Conclusions about bandgap change 2.6.6 Conclusions on favored reductive and oxidative sites 2.6.7 High temperature treatment 2.7 Summary and future perspectives of photodeposition 2.8 Bibliography Chapter 3-Towards temperature-dependent crystal facet engineering of hydrate-free WO 3 with plate-like morphology 3.1 Introduction 3.2 Materials and methods 3.3 Results and discussion 3.3.1 Characterization of as-synthesized WO 3 samples 3.3.2 Photocatalytic performance of synthesized WO 3 samples 3.4 Conclusions 3.5 Bibliography 3.6 Appendix Chapter 4-Phase transformations in citric acid-assisted hydrothermal growth of WO 3 and implications for photocatalytic performance 4.1 Introduction 4.2 Materials and methods 4.3 Results and discussion 4.3.1 In situ Raman spectroscopy of crystal phases during hydrothermal synthesis of WO 3 4.3.2 Microwave-assisted hydrothermal synthesis experiments 4.3.3 Photocatalytic activity tests 4.4 Conclusions 4.5 Bibliography 4.6 Appendix Chapter 5-Photodeposition mechanism of platinum on tungsten oxide and its corresponding stability upon aqueous phase illumination 5.

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Nanotechnology: Environmental Applications

Pelaez

Cui

Choi

et al. 2012

Encyclopedia of Environmetrics

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Nanomaterials are receiving particular interest due to their novel physical and chemical properties, which are important for a wide range of applications, including environmental remediation. This article presents an overview of the currentadvances on the most relevant nanomaterials and nanotechnologies employed for environmental remediation. Particular emphasis is given to nanostructured semiconductors for photocatalysis; the use of nanomaterials such as nano‐silver, single‐walled carbon nanotubes, fullerenes, and titania for disinfection purposes; reactive metal nanoparticles, in particular zero‐valent iron; ferrate and membrane nanotechnologies. These nanomaterials and nanotechnologies have been used for water and air purification or for the remediation of contaminated groundwater, soil, and sediments.

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Visible light-driven photodecomposition system: preparation and application of highly dispersed Pt-loaded WO ₃ microparticles

Cited by 8 publications

References 18 publications

Hybrid nanocomposites with enhanced visible light photocatalytic ability for next generation of clean energy systems

Hybrid nanocomposites with enhanced visible light photocatalytic ability for next generation of clean energy systems

Photodeposition of platinum nanoparticles on wel-defined tungsten oxide : controlling oxidation state, particle size and geometrical distribution

Nanotechnology: Environmental Applications

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Visible light-driven photodecomposition system: preparation and application of highly dispersed Pt-loaded WO 3 microparticles

Cited by 8 publications

References 18 publications

Hybrid nanocomposites with enhanced visible light photocatalytic ability for next generation of clean energy systems

Hybrid nanocomposites with enhanced visible light photocatalytic ability for next generation of clean energy systems

Photodeposition of platinum nanoparticles on wel-defined tungsten oxide : controlling oxidation state, particle size and geometrical distribution

Nanotechnology: Environmental Applications

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Visible light-driven photodecomposition system: preparation and application of highly dispersed Pt-loaded WO ₃ microparticles