Sargassum Horneri based carbon doped TiO 2 and its aquatic naphthalene photo‐degradation under sunlight irradiation

2021 ◽  
Author(s):  
Ganning Zeng ◽  
Chunxian Hong ◽  
Yuan Ma ◽  
Mingming Du ◽  
Yan Zhang ◽  
...  
Keyword(s):  
Sargassum Horneri ◽  
Photo Degradation ◽  
Sunlight Irradiation ◽  
Carbon Doped

Photoreduction of Dye with Noble Metal Gold Permeated with Metal Oxide Titania

2020 ◽  
Vol 20 (6) ◽  
pp. 3896-3901 ◽  
Author(s):  
Jyoti Bansal ◽  
A. K. Hafiz ◽  
Shailesh Narain Sharma
Keyword(s):  
Metal Oxide ◽  
Noble Metals ◽  
Irradiation Time ◽  
Visible Region ◽  
Visible Absorption ◽  
Photo Degradation ◽  
Sunlight Irradiation ◽  
Tunable Bandgap ◽  
Photo Response ◽  
Uv Visible

Photoactive degradation of textile malachite green (MG), methylene blue (MB) dyes has been permeated on metal oxide TiO2 nanoparticles under sunlight. Semiconductor photocatalysis is a promising method for removal of toxic chemicals from wastewater produced by industry. Due to tunable bandgap, TiO2 among various semiconductor studied mostly. Large band gap (UV active) and recombination of exciton in TiO2 less active in photo degradation. Noble metals such as gold nanoparticles deposited on TiO2 surface increased the optical activity and to shift optical response to visible region. Degradation detail has been carried out by characterisation such as XRD, UV-Vis, PL, TEM, and SEM for MG and MB textile dyes under sunlight irradiation. UV-visible absorption spectra and PL spectra shows that photo-response of as prepared sample is extended from UV to visible region. PL intensity decreases with increases in concentration of Au nanoparticles, decreases in intensity in optical spectra of Au–TiO2 composites shows that charge transfer process dominates. Au–TiO2 plays an essential role in enhancing photocatalytical activity. Decolorization optimization depends on catalyst concentration, Dye concentration, light intensity and, irradiation time.

Photodegradation of Bisphenol A (BPA) by Carbon Doped TiO2 under Sunlight Irradiation

2013 ◽  
Vol 378 ◽  
pp. 121-124 ◽  
Author(s):  
Chao Yin Kuo ◽  
Ya Hui Yang ◽  
Hung Min Hsiao ◽  
Ssu Chun Liao
Keyword(s):  
Bisphenol A ◽  
Surface Area ◽  
Removal Rate ◽  
Surface Characteristics ◽  
Carbon Doping ◽  
Bet Surface Area ◽  
Sunlight Irradiation ◽  
Carbon Doped ◽  
Photodegradation Rate ◽  
Vis Spectroscopy

Carbon-doped TiO2 (C-TiO2) was synthesized to degrade bisphenol A (BPA) under sunlight irradiation. The C-TiO2 was a mixture of Degussa P25 and carbon fibers. Surface characteristics of prepared photocatalysts were measured by X-ray diffraction, ultraviolent (UV)-vis spectroscopy, and a BET surface area analyzer. The BPA removal rate satisfies pseudo-first-order kinetics. The percentage of anatase in TiO2 and C-TiO2 (C/Ti mole ratio = 0.05) was 75.5% and 76.1%, the specific surface area was 45.6 and 46.4 m2/g, band gap energy was 3.13 and 2.93 eV, and the BPA photodegradation rate was 1.48, and 2.08 hr-1, respectively. Photocatalytic activity of TiO2 was increased by carbon doping. The C-TiO2 was effective in degrading BPA under sunlight irradiation.

Highly photoactive Au-TiO2 nanowires for improved photo-degradation of propiconazole fungicide under UV/sunlight irradiation

Solar Energy ◽  
2017 ◽  
Vol 144 ◽  
pp. 612-618 ◽  
Author(s):  
Inderpreet Singh Grover ◽  
Roop Chand Prajapat ◽  
Satnam Singh ◽  
Bonamali Pal
Keyword(s):  
Tio2 Nanowires ◽  
Photo Degradation ◽  
Sunlight Irradiation

MAGNETIC ANISOTROPY OF CARBON DOPED Nd2Fe14B

1985 ◽  
Vol 46 (C6) ◽  
pp. C6-305-C6-308 ◽  
Author(s):  
F. Bolzoni ◽  
F. Leccabue ◽  
L. Pareti ◽  
J. L. Sanchez
Keyword(s):  
Magnetic Anisotropy ◽  
Carbon Doped

Photo-degradation of monoazo dye blue 13 using advanced oxidation process

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Aqueous Solution ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
High Energy ◽  
Uv Exposure ◽  
H2o2 Concentration ◽  
Oxidizing Agent ◽  
Photo Degradation ◽  
High Energy Radiation ◽  
Uv Lamp

The high energy radiation overcome the bonding of solute in a solution and H2O2 acts as an oxidizing agent and generates a free radical in the solution which results in photo-degradation by converting the solute in to simple form and resultantly, colored substance under the effect of photo-degradation becomes colorless. The photo-degradation of monoazo dye Blue 13 in an aqueous solution was investigated using a laboratory scale UV lamp in the presence of H2O2 and for maximum degradation of dye, the independent parameter UV power, UV exposure time, pH and H2O2 concentration were optimized. It was found that neither UV in the presence of H2O2 is able to degrade Blue 13 under optimum condition. The results revealed that the use of both UV and H2O2 have pronounced effect on the discoloration of dyes which could be used for management of textile effluents contain waste dyes.

Photo-catalytic Study of Malachite Green Dye Degradation Using Rice Straw Extracted Activated Carbon Supported ZnO Nano-particles

2020 ◽  
Vol 10 (6) ◽  
pp. 849-859
Author(s):  
Radwa A. El-Salamony ◽  
Abeer A. Emam ◽  
Nagwa A. Badawy ◽  
Sara F. El-Morsi
Keyword(s):  
Activated Carbon ◽  
Visible Light ◽  
Rice Straw ◽  
Malachite Green ◽  
Dye Degradation ◽  
Nano Particles ◽  
Oh Radicals ◽  
Impregnation Method ◽  
Photo Degradation ◽  
Malachite Green Dye

Objective: ZnO nanoparticles were synthesized using wet impregnation method, and activated carbon from rice straw (RS) prepared through chemical route. Methods: The nano-composites ZnO-AC series were prepared with different ZnO:AC ratio of 10, 20, 50, and 70% to optimize the zinc oxide nanoparticles used. The obtained composites were characterized by FE-SEM, XRD, SBET, and optical techniques then used for the photo-degradation of Malachite green dye (MG) under visible light. Results: It was found that 10ZnO-AC exhibited excellent visible light photo-catalytic performance. The ·OH radicals’ formation is matching with photo-activity of the prepared composites. The photo-degradation efficiency of MG increased from 63% to 93%, when the 10ZnO-AC photocatalyst amount was increased from 0.5 to 6 g/L. Conclusion: The GC-MS technique was used to analyze the intermediates formed; up to 15 kinds of chemicals were identified as the degradation products.

PERFORMANCE OF TUNGSTEN OXIDE DOPED TITANIA via SOL-GEL PROCESS FOR PHOTO-DEGRADATION OF TRANS-CINNAMIC ACID

2016 ◽  
Vol 24 (1) ◽  
pp. 75-86
Author(s):  
Y.N. Tan ◽  
◽  
A.H.A. Malek ◽  
M.Z.A. Malek ◽  
M.T. Zainuddin ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Cinnamic Acid ◽  
Sol Gel ◽  
Photo Degradation ◽  
Sol Gel Process ◽  
Doped Titania
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