New Bi2O3-ZnO composite deposited on glass wool. Effect of the synthesis method on photocatalytic efficiency under visible light

2019 ◽  
Vol 483 ◽  
pp. 859-869 ◽  
Author(s):  
Imane Benyamina ◽  
Kada Manseri ◽  
Meriem Mansour ◽  
Bahia Benalioua ◽  
Abdelhadi Bentouami ◽  
...  
Keyword(s):  
Visible Light ◽  
Synthesis Method ◽  
Glass Wool ◽  
Photocatalytic Efficiency

Construction of Visible Light Responsive CdSe/g-C3N4 Nanocomposites for H2 Production

2019 ◽  
Vol 11 (9) ◽  
pp. 1281-1291
Author(s):  
Mohammad W. Kadi ◽  
Reda M. Mohamed ◽  
Adel. A. Ismail ◽  
Detlef W. Bahnemann
Keyword(s):  
Visible Light ◽  
Large Scale ◽  
Synthesis Method ◽  
Clean Energy ◽  
H2 Production ◽  
Photocatalytic Efficiency ◽  
Aqueous Synthesis ◽  
Xrd Diffraction ◽  
Orderly Fashion ◽  
Hexagonal Arrangement

Utilization of heterogeneous photocatalysts for H2 production using water splitting reaction under visible light is a promising approach for production of large scale sustainable, renewable, and clean energy. CdSe/g-C3N4 nanocomposites were synthesized in this study by employing a simple aqueous synthesis method. Various CdSe contents were tested as a photocatalyst in the H2 production. XRD diffraction results confirmed the hexagonal arrangement of CdSe and its incorporation onto g-C3N4. Spherical shaped CdSe nanoparticles were distributed on the g-C3N4 nanosheets in an orderly fashion. The photocatalytic efficiency of CdSe/g-C3N4 composites was assessed utilizing glycerol as a scavenger. The photocatalytic activity for H2 production was enhanced by increasing the CdSe content, reaching H2 yield of up to 26000 μmol·g-1 using 5% CdSe/g-C3N4 nanocomposite. The produced H2 was higher ∼86 and 52 times than g-C3N4 and CdSe. The H2 production yield also increased with increased 5% CdSe/g-C3N4 photocatalyst load.

Linking Melem with Conjugated Schiff-Base Bond to Boost Photocatalytic Efficiency of Carbon Nitride for Overall Water Splitting

Nanoscale ◽  
2021 ◽  
Author(s):  
Hu Liu ◽  
Mengqi Shen ◽  
Peng Zhou ◽  
Zhi Guo ◽  
Xinyang Liu ◽  
...  
Keyword(s):  
Schiff Base ◽  
Visible Light ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Light Irradiation ◽  
Graphitic Carbon Nitride ◽  
Photocatalytic Efficiency ◽  
Metal Free ◽  
Overall Water Splitting

Developing an efficient single component photocatalyst for overall water splitting under visible-light irradiation is extremely challenging. Herein, we report a metal-free graphitic carbon nitride (g-CxN4)-based nanosheet photocatalyst (x = 3.2,...

scholarly journals Preparation of N-TiO2/SiO2 composites by solvothermal method and their photocatalytic properties

2022 ◽  
Author(s):  
Chunli Wu ◽  
Xiaohao Dong ◽  
Lan Wang ◽  
Lei Zhang ◽  
Xiaotong Liu
Keyword(s):  
Nitric Acid ◽  
Energy Level ◽  
Visible Light ◽  
Solvothermal Method ◽  
Synthesis Method ◽  
Volume Ratio ◽  
Tetrabutyl Titanate ◽  
Characterization Methods ◽  
Long Term Stability ◽  
Photoelectric Properties

Abstract In order to improve the visible light catalytic activity of titanium dioxide (TiO2) and ensure its long-term stability on the surface of concrete, an N-TiO2/SiO2 composite was prepared using tetrabutyl titanate, nitric acid, and modified SiO2 nanospheres as the precursors by a solvothermal method. The effect of nitric acid on the phase composition, morphology and photoelectric properties of the synthesized photocatalytic composites was systematically studied by various characterization methods. The results show that the optimum nitric acid/butyl titanate volume ratio is 1/6. The nitrogen-doped TiO2 nanoparticles were uniformly dispersed on the surface of spherical SiO2 with a diameter of 200 nm. The degradation rate of simulated pollutants (RhB) with pH 5 and 7 exceeded 95% within 30 minutes and the catalytic effect remained excellent after five repetitions without much weakening. The excellent visible photocatalytic performance can be attributed to the doping of N replacing part of the oxygen atoms in TiO2, forming the energy level of N 2p at the O 2p energy level and reducing the TiO2 energy band gap to 2.99 eV. At the same time, the better dispersion of N-TiO2/SiO2 prepared by this new synthesis method also plays an important role in the improvement of visible light photocatalytic activity.

Polyimide with enhanced π stacking for efficient visible-light-driven photocatalysis

2021 ◽  
Author(s):  
Kelian Zhang ◽  
Hanmei Li ◽  
Haixian Shi ◽  
Wei Hong
Keyword(s):  
Visible Light ◽  
Surface Area ◽  
Organic Semiconductor ◽  
Light Harvesting ◽  
Photocatalytic Efficiency ◽  
Π Stacking ◽  
Visible Light Driven ◽  
Donor Acceptor

The organic semiconductor of polyimide has received considerable attention as a chemically stable donor-acceptor photocatalyst, yet exhibits moderate photocatalytic efficiency which is limited by low surface area, insufficient light harvesting...

scholarly journals Photocatalytic degradation of deoxynivalenol over dendritic-like α-Fe2O3 under visible light irradiation

Toxins ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 105 ◽  
Author(s):  
Huiting Wang ◽  
Jin Mao ◽  
Zhaowei Zhang ◽  
Qi Zhang ◽  
Liangxiao Zhang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Photoelectron Spectroscopy ◽  
High Performance ◽  
Synthesis Method ◽  
Light Irradiation ◽  
Trichothecene Mycotoxin ◽  
X Ray

Deoxynivalenol (DON) is a secondary metabolite produced by Fusarium, which is a trichothecene mycotoxin. As the main mycotoxin with high toxicity, wheat, barley, corn and their products are susceptible to contamination of DON. Due to the stability of this mycotoxin, traditional methods for DON reduction often require a strong oxidant, high temperature and high pressure with more energy consumption. Therefore, exploring green, efficient and environmentally friendly ways to degrade or reduce DON is a meaningful and challenging issue. Herein, a dendritic-like α-Fe2O3 was successfully prepared using a facile hydrothermal synthesis method at 160 °C, which was systematically characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). It was found that dendritic-like α-Fe2O3 showed superior activity for the photocatalytic degradation of DON in aqueous solution under visible light irradiation (λ > 420 nm) and 90.3% DON (initial concentration of 4.0 μg/mL) could be reduced in 2 h. Most of all, the main possible intermediate products were proposed through high performance liquid chromatography-mass spectrometry (HPLC-MS) after the photocatalytic treatment. This work not only provides a green and promising way to mitigate mycotoxin contamination but also may present useful information for future studies.

scholarly journals Ag2O-decorated electrospun BiVO4 nanofibers with enhanced photocatalytic performance

RSC Advances ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 6114-6120 ◽  
Author(s):  
Junpeng Ren ◽  
Yongyong Zhu
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Cycling Stability ◽  
Photocatalytic Efficiency ◽  
Heterogeneous Structures ◽  
Good Cycling Stability ◽  
Visible Light Photocatalytic

Ag2O doped electrospun BiVO4 nanofibers with p–n junction heterogeneous structures show enhanced photocatalytic activity under visible light (photocatalytic efficiency: 98.47% within 100 min) and good cycling stability.

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