A Novel Heterogeneous Catalyst NH2-MIL-88/PMo10V2 for Photocatalytic Activity Enhancement of Benzene Hydroxylation

2021 ◽  
Author(s):  
PanPan Xu ◽  
Liuxue Zhang ◽  
Xu Jia ◽  
Hao Wen ◽  
Xiulian Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Aromatic Hydrocarbon ◽  
Production Process ◽  
Heterogeneous Catalyst ◽  
Direct Oxidation ◽  
Benzene Hydroxylation ◽  
Activity Enhancement

Comparing to current commercial three-step production process involving low phenol yield, low atomic efficiency, and the formation of explosive intermediates. The direct oxidation of aromatic hydrocarbon to more desirable and...

Acai seed ash as a novel basic heterogeneous catalyst for biodiesel synthesis: Optimization of the biodiesel production process

Fuel ◽  
2021 ◽  
Vol 299 ◽  
pp. 120887
Author(s):  
Erica Karine Lourenço Mares ◽  
Matheus Arrais Gonçalves ◽  
Patrícia Teresa Souza da Luz ◽  
Geraldo Narciso da Rocha Filho ◽  
José Roberto Zamian ◽  
...  
Keyword(s):  
Production Process ◽  
Heterogeneous Catalyst ◽  
Biodiesel Production ◽  
Biodiesel Synthesis

Photocatalytic activity enhancement of carbon‐doped g‐C 3 N 4 by synthesis of nanocomposite with Ag 2 O and α‐Fe 2 O 3

2021 ◽  
Author(s):  
Ali Reza Amani‐Ghadim ◽  
Abdolreza Tarighati Sareshkeh ◽  
Narges Nozad Ashan ◽  
Homa Mohseni‐Zonouz ◽  
Seyed Masoud Seyed Ahmadian ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Carbon Doped ◽  
Activity Enhancement

Synergistic effects of Fe and graphene on photocatalytic activity enhancement of TiO2 under visible light

2012 ◽  
Vol 258 (15) ◽  
pp. 5827-5834 ◽  
Author(s):  
N.R. Khalid ◽  
Zhanglian Hong ◽  
E. Ahmed ◽  
Yuewei Zhang ◽  
He Chan ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Synergistic Effects ◽  
Activity Enhancement

Photocatalytic activity enhancement in doped titanium dioxide by crystal defects

2012 ◽  
Vol 41 (16) ◽  
pp. 4824 ◽  
Author(s):  
Kanakkanmavudi B. Jaimy ◽  
V. P. Safeena ◽  
Swapankumar Ghosh ◽  
Neha Y. Hebalkar ◽  
K. G. K. Warrier
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Crystal Defects ◽  
Activity Enhancement ◽  
Doped Titanium Dioxide

Enhanced Photocatalytic Performance and Mechanism of Ag3PO4 Particles Synthesized via a Sonochemical Process

2018 ◽  
Vol 10 (3) ◽  
pp. 337-345 ◽  
Author(s):  
Chengxiang Zheng ◽  
Hua Yang ◽  
Yang Yang ◽  
Haimin Zhang
Keyword(s):  
Particle Size ◽  
Photocatalytic Activity ◽  
Reaction Time ◽  
Reaction Temperature ◽  
Ph Value ◽  
Dye Degradation ◽  
Sonochemical Method ◽  
Simulated Sunlight ◽  
Spherical Nanoparticles ◽  
Direct Oxidation

A facile sonochemical method was used to synthesize Ag3PO4 particles and the effect of pH value, reaction temperature and reaction time on the products was investigated. It is found that the samples prepared at neutral (pH = 7) and alkaline (pH = 11) environments exhibit a similar particle morphology and size. The particles are shaped like spheres with a size distribution majorly focusing on a range of 200–450 nm, and the average particle size is about 300 nm. The sample prepared at acidic environment (pH = 3) is composed of polyhedral microparticles with size of 5–8 μm. At relatively low temperatures of 20–50 °C, the spherical nanoparticles do not undergo obvious morphology/size changes; however, when the temperature is increased up to 80 °C, the nanoparticles are aggregated to form large-sized polyhedral microparticles in the size range of 4–7 μm. Compared to the pH value and reaction temperature, the reaction time has a minor effect on the morphology of Ag3PO4 particles. RhB was chosen as the target pollutant to evaluate the photocatalytic activity of the as-prepared Ag3PO4 samples under simulated-sunlight irradiation. It is shown that the samples consisting of spherical nanoparticles exhibit an extremely high photocatalytic activity, and the degradation percentage of RhB after reaction for 50 min reaches over 90%. The samples of polyhedral microparticles have a relatively low photocatalytic activity, which is possibly due to their large particle size. Hydroxyl (.OH) radical was detected by spectrofluorimetry using terephthalic acid as a .OH scavenger and was not found to be produced over the simulated-sunlight-irradiated Ag3PO4 catalyst. The effect of ethanol, benzoquinone and ammonium oxalate on dye degradation was also investigated. Based on experimental results, the direct oxidation by h+ is suggested to the dominant mechanism toward the dye degradation.

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