Enhanced gas-phase photocatalytic oxidation of n-pentane using high visible-light-driven Fe-doped WO3 nanostructures

2018 ◽  
Vol 6 (5) ◽  
pp. 6741-6748 ◽  
Author(s):  
Maryam Torabi Merajin ◽  
Mohammad Nasiri ◽  
Ebrahim Abedini ◽  
Shahram Sharifnia
Keyword(s):  
Visible Light ◽  
Gas Phase ◽  
Photocatalytic Oxidation ◽  
Visible Light Driven ◽  
Wo3 Nanostructures

Photocatalytic oxidation of gas-phase Hg0 by carbon spheres supported visible-light-driven CuO–TiO2

2017 ◽  
Vol 46 ◽  
pp. 416-425 ◽  
Author(s):  
Jiang Wu ◽  
Chaoen Li ◽  
Xiantuo Chen ◽  
Jing Zhang ◽  
Lili Zhao ◽  
...  
Keyword(s):  
Visible Light ◽  
Gas Phase ◽  
Photocatalytic Oxidation ◽  
Carbon Spheres ◽  
Visible Light Driven

scholarly journals Photocatalytic Oxidation of Gaseous Isopropanol Using Visible-Light Active Silver Vanadates/SBA-15 Composite

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Ting-Chung Pan ◽  
Hung-Chang Chen ◽  
Guan-Ting Pan ◽  
Chao-Ming Huang
Keyword(s):  
Visible Light ◽  
Adsorption Capacity ◽  
Lewis Acids ◽  
Photocatalytic Oxidation ◽  
Hydrothermal Condition ◽  
Incipient Wetness Impregnation ◽  
Visible Light Active ◽  
Visible Light Driven ◽  
Enhanced Adsorption ◽  
Diffuse Reflectance Infrared

An environmentally friendly visible-light-driven photocatalyst, silver vanadates/SBA-15, was prepared through an incipient wetness impregnation procedure with silver vanadates (SVO) synthesized under a hydrothermal condition without a high-temperature calcination. The addition of mesoporous SBA-15 improves the formation of nanocrystalline silver vanadates. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) confirms the presence of Brønsted and Lewis acids on the SVO/SBA-15 composites. The results of photoluminescence spectra indicated that the electron-hole recombination rate have been effectively inhibited when SVO was loaded with mesoporous SBA-15. All the composites loaded with various amount of SVO inherit the higher adsorption capacity and larger mineralization yield than those of P-25 (commercial TiO2) and pure SVO. The sample loaded with 51% of SVO (51SVO/SBA-15) with mixed phases of Ag4V2O7and α-Ag3VO4exhibits the best photocatalytic activity. A favorable crystalline phase combined with high intensities of Brønsted and Lewis acids is considered the main cause of the enhanced adsorption capacity and outstanding photoactivity of the SVO/SBA-15 composites.

scholarly journals Water-Stable Boron-Doped Boron Nitride Photocatalyst for Visible Light-Driven H2 Evolution and CO2 Photoreduction

2020 ◽  
Author(s):  
Ravi Shankar ◽  
Daphne Lubert-Perquel ◽  
Elan Mistry ◽  
Irena Nevjestić ◽  
Sandrine Heutz ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Visible Light ◽  
Gas Phase ◽  
Hyperfine Interactions ◽  
Quantum Yields ◽  
H2 Evolution ◽  
Co2 Photoreduction ◽  
Boron Doped ◽  
Out Of Plane ◽  
Visible Light Driven

<p>Developing robust, multifunctional photocatalysts that can facilitate both hydrogen evolution via photoreforming of water and gas phase CO2 photoreduction is highly desirable with the long-term vision of integrated photocatalytic setups. Here, we present a new addition to the boron nitride (BN) photocatalyst material platform, boron-doped boron oxynitride (B-BNO), capable of fulfilling this goal. Detailed EPR studies revealed hyperfine interactions between free charges located on discrete OB3 sites, exhibiting an out-of-plane symmetry, and the nuclei of neighbouring boron atoms. This material resolves two long-standing bottlenecks associated to BN-based materials concomitantly: instability in water and lack of photo activity under visible light. We show that B-BNO maintains prolonged stability in water for at least three straight days and can facilitate both liquid phase H2 evolution and gas phase CO2 photoreduction, using UV-Vis and deep visible irradiation (λ > 550 nm), without any cocatalysts. The evolution rates, apparent quantum yields, and selectivities observed for both reactions with B-BNO exceed those of its porous BNO counterpart, P25 TiO2 and bulk g-C3N4. This work provides scope to expand the BN photocatalyst platform to a wider range of reactions.</p>

Boron-Doped Boron Nitride Photocatalyst for Visible Light-Driven H2 Evolution and CO2 Photoreduction

2020 ◽  
Author(s):  
Ravi Shankar ◽  
Daphne Lubert-Perquel ◽  
Elan Mistry ◽  
Irena Nevjestić ◽  
Sandrine Heutz ◽  
...  
Keyword(s):  
Visible Light ◽  
Gas Phase ◽  
Hyperfine Interactions ◽  
Free Oxygen Radicals ◽  
Co Catalysts ◽  
Boron Doped ◽  
The Family ◽  
Visible Light Driven ◽  
Band Gap Narrowing

<p>Developing robust, multifunctional photocatalysts that can facilitate both hydrogen evolution <i>via</i> photoreforming of water and gas phase CO<sub>2</sub> photoreduction is highly desirable with the long-term vision of integrated photocatalytic setups. Here, we present a step-change in the family of boron oxynitride materials by introducing the first example of a B-doped boron oxynitride (B-BNO). This material resolves an on-going bottleneck associated with BN-based materials, i.e. the lack of photoactivity under visible light. Detailed EPR studies revealed distinct hyperfine interactions between the free oxygen radicals and 3 neighbouring boron nuclei. This confirmed isolated OB<sub>3 </sub>sites, which contribute to band gap narrowing, as the radical species and origin of paramagnetism in BNO materials. We show that B-BNO can facilitate both liquid phase H<sub>2 </sub>evolution and gas phase CO<sub>2</sub> photoreduction, using UV-Vis and deep visible irradiation (λ > 550 nm), without any co-catalysts. The evolution rates, quantum efficiencies, and selectivities observed for both reactions with B-BNO exceed those of its porous BNO counterpart, P25 TiO<sub>2</sub> and bulk g-C<sub>3</sub>N<sub>4</sub>.</p>

Controllable synthesis of 3D BiVO4 superstructures with visible-light-induced photocatalytic oxidation of NO in the gas phase and mechanistic analysis

2015 ◽  
Vol 17 (43) ◽  
pp. 28809-28817 ◽  
Author(s):  
Man Ou ◽  
Haoyu Nie ◽  
Qin Zhong ◽  
Shule Zhang ◽  
Lei Zhong
Keyword(s):  
Visible Light ◽  
Gas Phase ◽  
Double Layer ◽  
Cross Sections ◽  
Photocatalytic Oxidation ◽  
Active Species ◽  
Controllable Synthesis ◽  
Open Flower ◽  
Mechanistic Analysis ◽  
Oxidation Of No

Three 3D ms-BiVO4 superstructures, including a flower, a double-layer half-open flower and a hollow tube with square cross-sections has been synthesized and used for the photocatalytic oxidation of NO. The identification of the main active species in the PCO of the NO process was also clarified.

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