An inorganic hydrothermal route to photocatalytically active bismuth vanadate

Zhou, Ying; Vuille, Kathrin; Heel, André; Probst, Benjamin; Kontic, Roman; Patzke, Greta R.

doi:10.1016/j.apcata.2009.12.031

Cited by 115 publications

(71 citation statements)

References 37 publications

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“…This is in line with the previously described key importance of BiVO 4 surface tuning in photocatalytic decomposition reactions for wastewater treatment [42]. The productive effect of TiO 2 coating was less pronounced in O 2 evolution that shows a lower dependence on surface optimization strategies.…”

Section: Discussionsupporting

confidence: 76%

“…Given that higher Mo contents may exert an overall deteriorating effect as indicated from the results on as-synthesized products, replacement of 2-5 % V by Mo, followed by calcination under mild conditions (500 °C) is an optimal procedure to generate synthesized particles with respect to MB decomposition and water oxidation: Degradation of organic compounds requires optimized particle morphologies and high surface areas, whereas band gap as well as overall crystallinity are more important for O 2 evolution [42]. Mo(VI)…”

Section: Hydrothermal Synthesis Characterization and Photocatalytic mentioning

confidence: 99%

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Synthetic trends for BiVO4 photocatalysts: Molybdenum substitution vs. TiO2 and SnO2 heterojunctions

Kontic

Patzke

2012

Journal of Solid State Chemistry

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Section: Discussionsupporting

confidence: 76%

Section: Hydrothermal Synthesis Characterization and Photocatalytic mentioning

confidence: 99%

Synthetic trends for BiVO4 photocatalysts: Molybdenum substitution vs. TiO2 and SnO2 heterojunctions

Kontic

Patzke

2012

Journal of Solid State Chemistry

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“…We can see that the photocatalytic performance increases with increasing heat treatment temperature until 700 °C, however, when the temperature increased further to 800 °C, the photocatalytic performance decreases. This is because the crystallinity degree increases with increasing the heat treatment temperature, and a highly crystalline structure suppresses the recombination of photogenerated electron-hole pairs [39]; but the surface area of H800 (3.2 m 2 ·g −1 ) is smaller than that of H700 (4.9 m 2 ·g −1 ), and the high surface area supplies more active sites for the degradation of MB, and promotes the electron-hole pairs separation effectively [43]. Furthermore, H700 exhibits the lowest band gap energy, and the lower the band gap energy, the higher the photocatalytic performance [44].…”

Section: Photocatalytic Activity and Recycling Performancementioning

confidence: 99%

“…The band gap energy can be calculated The BET specific surface areas of the BiVO 4 samples synthesized under different conditions are summarized in Table 1. The specific surface area varies as heat treatment temperature changes, because the samples morphologies depended on the heat treatment temperature, and the morphology affects the specific surface area [39].…”

Section: Uv-vis Diffuse Reflectance Spectra (Uv-vis Drs)mentioning

confidence: 99%

A Novel, Simple and Green Way to Fabricate BiVO4 with Excellent Photocatalytic Activity and Its Methylene Blue Decomposition Mechanism

Guo

Wang

et al. 2016

Crystals

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BiVO 4 photocatalysts were synthesized via a facile surfactant-free method with heat treatment. The heat treatment temperatures influenced the crystal structures and morphologies. The photocatalytic performance is associated with its crystallinity, Brunauer-Emmett-Teller (BET) specific surface area, and band gap energy. The BiVO 4 photocatalyst prepared by heat treatment at 700˝C showed the highest photocatalytic activity, promoting 100% degradation of methylene blue (MB) in 60 min under visible-light irradiation. Recycling experiments results indicated that the BiVO 4 photocatalysts have excellent photo-stability, and a possible mechanism for the photocatalytic process was proposed by examining the effects of the active species involved in MB degradation. This work could provide new insights into the fabrication of highly efficient and stable BiVO 4 photocatalysts for dye degradation.

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“…[32] Recently, we have thus reported on a new additive-assisted hydrothermal pathway to photocatalytically active BiVO 4 . [33] Screening experiments revealed that the presence of K 2 SO 4 /g) is endard laboratory protocol had been set up for 180 °C. [23] In situ EDXRD is a powerful complementary method that reveals the induction periods and reaction times of a given hydrothermal process through the evaluation of time-dependent X-ray diffraction patterns.…”

Section: Understanding Materials: In Situ Investigation Of Oxide Nanomentioning

confidence: 99%

Targeted Synthesis and Environmental Applications of Oxide Nanomaterials

Zhou

Patzke

2010

Chimia

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Oxide nanomaterials are indispensable building blocks for a future nanotechnology, because they offer an infinite variety of structural motifs that lead to their widespread technical application. Therefore, flexible and tunable preparative strategies are required to convert this large family of materials onto the nanoscale. Although hydrothermal syntheses have proven especially suitable for this purpose, their reaction pathways and mechanisms often remain unknown so that they can be difficult to control. In the following, we summarize our comprehensive approach towards nanostructured functional oxides that is based on synthetic parameter optimizations, mechanistic in situ investigations and the characterization of environmentally relevant properties, e.g. in photocatalysis or sensor technology. The connection between preparative morphology control and the resulting materials properties is demonstrated for selected tungstate systems and bismuth-containing oxides. Furthermore, different methods for the in situ monitoring of hydrothermal processes are discussed. 252 CHIMIA 2010, 64, No. 4 Young AcAdemics in switzerlAnd PArt iii doi:10.2533doi:10. /chimia.2010doi:10. .252 Chimia 64 (2010 Keywords: Hydrothermal synthesis · in situ EXAFS/EDXRD · Nanomaterials · Oxides · PhotocatalysisSince summer 2007, Greta R. Patzke is SNSF Professor (tenure track) at the Institute of Inorganic Chemistry at the University of Zurich. She was born 1974 in Bremen (Germany). From 1993 to 1997, she studied chemistry at the University of Hannover (Germany). Her diploma thesis covered solid state and computational chemistry.In 1999, she received her doctoral degree summa cum laude from the University of Hannover. Her work was supported by the Studienstiftung des Deutschen Volkes, and she worked with Prof. Michael Binnewies on the synthesis, characterization and properties of mixed oxides with special emphasis on crystal growth methods from the gas phase.She then moved to ETH Zürich and joined the group of Prof. Reinhard Nesper to work on her habilitation. During these years, she developed a wide range of research interests including structural inorganic chemistry, nanomaterials synthesis and the systematic application and investigation of hydrothermal techniques. She received the Venia Legendi for inorganic chemistry from ETH Zürich in October 2006. Her present research activities are focused on the targeted synthesis of functional inorganic materials, such as oxide nanomaterials for photocatalytic and sensor applications or bio-active polyoxometalates and hybrid materials thereof.

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An inorganic hydrothermal route to photocatalytically active bismuth vanadate

Cited by 115 publications

References 37 publications

Synthetic trends for BiVO4 photocatalysts: Molybdenum substitution vs. TiO2 and SnO2 heterojunctions

Synthetic trends for BiVO4 photocatalysts: Molybdenum substitution vs. TiO2 and SnO2 heterojunctions

A Novel, Simple and Green Way to Fabricate BiVO4 with Excellent Photocatalytic Activity and Its Methylene Blue Decomposition Mechanism

Targeted Synthesis and Environmental Applications of Oxide Nanomaterials

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