Pt–BiVO4/TiO2 composites as Z-scheme photocatalysts for hydrogen production from ethanol: the effect of BiVO4 and Pt on the photocatalytic efficiency

2021 ◽  
Vol 45 (9) ◽  
pp. 4481-4495
Author(s):  
Sahar Mansour ◽  
Rym Akkari ◽  
Erika Soto ◽  
Semy Ben Chaabene ◽  
Noelia Mota ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Photocatalytic Efficiency ◽  
Composite Surface ◽  
Platinum Particles

The photodeposition of platinum particles on the BiVO4/TiO2 composite surface promotes the H2 production by reducing H+ species.

Graphitic Carbon Nitride-Titanium Dioxide Nanocomposite for Photocatalytic Hydrogen Production under Visible Light

2016 ◽  
Vol 14 (4) ◽  
pp. 851-858 ◽  
Author(s):  
Mohammad Reza Gholipour ◽  
Francois Béland ◽  
Trong-On Do
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Carbon Nitride ◽  
Fossil Fuels ◽  
Clean Energy ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Conduction Band Edge ◽  
Photocatalytic Efficiency ◽  
Photocatalytic Reactions

Abstract Hydrogen production from water splitting via photocatalytic reactions can be an alternative clean energy of fossil fuels in the future. Graphitic carbon nitride (g-C3N4) is one of the active photocatalysts in the visible light region that can be combined with other semiconductors in order to increase its photocatalytic efficiency. TiO2 is one of the most appropriate choices to combine with g-C3N4 because of its conduction band edge and variety forms of nanostructures. In this work, nanosheets of g-C3N4 were mixed with the nanoparticles of titanate in order to enhance charge separation and photocatalytic efficiency. Consequently, the hydrogen evolution of this novel nanocomposite produced almost double hydrogen in comparison with g-C3N4.

Boosting photocatalytic hydrogen production activity by microporous CuII-MOF nanoribbon decorated with Pt nanoparticles

2021 ◽  
Author(s):  
Lei Li ◽  
Yan Zhao ◽  
Qian Wang ◽  
Zheng-Yu Liu ◽  
Xiu-Guang Wang ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Energy Production ◽  
Metal Organic Framework ◽  
Pt Nanoparticles ◽  
Hydrogen Energy ◽  
Photocatalytic Efficiency ◽  
Production Activity ◽  
Metal Organic

Improving the photocatalytic efficiency for hydrogen evolution from water splitting plays vital roles for the feasible applications of clean and sustainable hydrogen energy production. A crystalline microporous CuII-based metal-organic framework...

Highly efficient photocatalytic hydrogen production from pure water via a photoactive metal–organic framework and its PDMS@MOF

2017 ◽  
Vol 5 (17) ◽  
pp. 7833-7838 ◽  
Author(s):  
Pengyan Wu ◽  
Min Jiang ◽  
Yang Li ◽  
Yanhong Liu ◽  
Jian Wang
Keyword(s):  
Hydrogen Production ◽  
High Stability ◽  
Metal Organic Framework ◽  
Pure Water ◽  
Pdms Layer ◽  
Photocatalytic Efficiency ◽  
Photocatalytic Hydrogen Production ◽  
Highly Efficient ◽  
Metal Organic ◽  
Organic Framework

Photoactive MOF modified with a thin PDMS layer exhibits high stability and ultrahigh photocatalytic efficiency for H2 production in water.

scholarly journals Composite photocatalysts based on Cd1−xZnxS and TiO2 for hydrogen production under visible light: effect of platinum co-catalyst location

RSC Advances ◽  
2021 ◽  
Vol 11 (60) ◽  
pp. 37966-37980
Author(s):  
Angelina V. Zhurenok ◽  
Dina V. Markovskaya ◽  
Evgeny Yu. Gerasimov ◽  
Svetlana V. Cherepanova ◽  
Andrey V. Bukhtiyarov ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Light Effect ◽  
Co Catalyst ◽  
Composite Photocatalysts ◽  
Platinum Particles ◽  
First Time

The determination of the preferred location of platinum particles in TiO2–Cd1−xZnxS systems was carried out for the first time.

Confining lead-free perovskite quantum dots in metal-organic frameworks for visible light-driven proton reduction

2021 ◽  
Author(s):  
Yaoyao Wang ◽  
Xueyang Ji ◽  
Meng Yu ◽  
Jun Tao
Keyword(s):  
Quantum Dots ◽  
Hydrogen Production ◽  
Visible Light ◽  
Metal Organic Frameworks ◽  
Lead Free ◽  
Photocatalytic Efficiency ◽  
Proton Reduction ◽  
Perovskite Quantum Dots ◽  
Visible Light Driven ◽  
Metal Organic

Inhibition of the recombination of photo-induced electrons and holes is critical for light harvesting and enhancing the photocatalytic efficiency of hydrogen production in metal-organic frameworks (MOFs). Herein, Cs3Bi2I9 (CBI) quantum...

Facile Synthesis by Peroxide Method and Microwave-Assisted Hydrothermal Treatment of TiO2 with High Photocatalytic Efficiency for Dye Degradation and Hydrogen Production

2018 ◽  
Vol 3 (41) ◽  
pp. 11454-11459 ◽  
Author(s):  
Ana Paula Garcia ◽  
Waleska Campos Guaglianoni ◽  
Danielle Rodrigues Garcia ◽  
Luana Goés Soares ◽  
Maurício de Oliveira Vaz ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Hydrothermal Treatment ◽  
Dye Degradation ◽  
Photocatalytic Efficiency ◽  
Facile Synthesis ◽  
Microwave Assisted ◽  
Peroxide Method

Use of fractals to describe microstructures of porous thick-film platinum electrodes

1992 ◽  
Vol 50 (1) ◽  
pp. 314-315
Author(s):  
Steven D. Toteda
Keyword(s):  
Fractal Dimension ◽  
Power Plants ◽  
Electrical Response ◽  
Cubic Phase ◽  
Platinum Electrodes ◽  
Fine Grained ◽  
Impedance Response ◽  
Platinum Particles ◽  
Energy Surfaces ◽  
Highly Porous

Zirconia oxygen sensors, in such applications as power plants and automobiles, generally utilize platinum electrodes for the catalytic reaction of dissociating O2 at the surface. The microstructure of the platinum electrode defines the resulting electrical response. The electrode must be porous enough to allow the oxygen to reach the zirconia surface while still remaining electrically continuous. At low sintering temperatures, the platinum is highly porous and fine grained. The platinum particles sinter together as the firing temperatures are increased. As the sintering temperatures are raised even further, the surface of the platinum begins to facet with lower energy surfaces. These microstructural changes can be seen in Figures 1 and 2, but the goal of the work is to characterize the microstructure by its fractal dimension and then relate the fractal dimension to the electrical response. The sensors were fabricated from zirconia powder stabilized in the cubic phase with 8 mol% percent yttria. Each substrate was sintered for 14 hours at 1200°C. The resulting zirconia pellets, 13mm in diameter and 2mm in thickness, were roughly 97 to 98 percent of theoretical density. The Engelhard #6082 platinum paste was applied to the zirconia disks after they were mechanically polished ( diamond). The electrodes were then sintered at temperatures ranging from 600°C to 1000°C. Each sensor was tested to determine the impedance response from 1Hz to 5,000Hz. These frequencies correspond to the electrode at the test temperature of 600°C.

Utilization of electrical charges in the pores of tofu waste for hydrogen production in water

2020 ◽  
pp. 124-135
Author(s):  
I. N. G. Wardana ◽  
N. Willy Satrio
Keyword(s):  
Magnetic Field ◽  
Hydrogen Production ◽  
Sodium Bicarbonate ◽  
Positive Charge ◽  
Electrical Energy ◽  
Hydrogen Sensor ◽  
Water Molecules ◽  
Partial Charge ◽  
Delocalized Electron ◽  
Water Hydrogen

Tofu is main food in Indonesia and its waste generally pollutes the waters. This study aims to change the waste into energy by utilizing the electric charge in the pores of tofu waste to produce hydrogen in water. The tofu pore is negatively charged and the surface surrounding the pore has a positive charge. The positive and negative electric charges stretch water molecules that have a partial charge. With the addition of a 12V electrical energy during electrolysis, water breaks down into hydrogen. The test was conducted on pre-treated tofu waste suspension using oxalic acid. The hydrogen concentration was measured by a MQ-8 hydrogen sensor. The result shows that the addition of turmeric together with sodium bicarbonate to tofu waste in water, hydrogen production increased more than four times. This is due to the fact that magnetic field generated by delocalized electron in aromatic ring in turmeric energizes all electrons in the pores of tofu waste, in the sodium bicarbonate, and in water that boosts hydrogen production. At the same time the stronger partial charge in natrium bicarbonate shields the hydrogen proton from strong attraction of tofu pores. These two combined effect are very powerful for larger hydrogen production in water by tofu waste.

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