scholarly journals Eco-friendly Synthesis of CRGO and CRGO/SnO2 Nanocomposite for Photocatalytic Degradation of Methylene Green Dye

ACS Omega ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 158-169 ◽  
Author(s):  
Subramanian Ramanathan ◽  
Natarajan Radhika ◽  
Dhanasekaran Padmanabhan ◽  
Arulappan Durairaj ◽  
Steplin Paul Selvin ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Methylene Green

Influence of Mn2+ Ion on the Surface of BiOCl Catalyst for Photocatalytic Degradation of Methylene Green under Visible Light Illumination

2013 ◽  
Vol 764 ◽  
pp. 194-205 ◽  
Author(s):  
Bhawna Sarwan
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Reflectance Spectra ◽  
Light Irradiation ◽  
Light Illumination ◽  
Scanning Electron Micrographs ◽  
Methylene Green ◽  
Mn Doped

In the present investigation, hydrolysis method has been used to synthesize mangnese doped BiOCl. The catalyst was characterized by X-ray diffraction (XRD), scanning electron micrographs (SEM) and diffusive reflectance spectra (DRS) methods. Interesting results have been obtained from diffusive reflectance spectra which depicted that there is a shift in the optical absorption edge towards higher wavelength, which indicates a decrease in the band gap upon Mn doping. The photocatalytic activity of Mn doped catalyst was evaluated from the photodegradation of methylene green (MG) aqueous solution under visible light irradiation. Mn2+ doping effectively improved the photocatalytic activity of BiOCl under visible light irradiation. The possible degradation pathway has been proposed for the photocatalytic degradation by using certain radical scavengers. The photocatalytic reaction mechanism of Mn doped BiOCl catalyst has also been tentatively discussed.

Photocatalytic degradation of methylene blue from aqueous solutions using nanopillars-TiO2 thin films: Batch reactor studies

2018 ◽  
Vol 18 (3) ◽  
pp. 81-91 ◽  
Author(s):  
C. Lalhriatpuia
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Organic Carbon ◽  
Photocatalytic Degradation ◽  
Batch Reactor ◽  
Tio2 Thin Films ◽  
Initial Concentration ◽  
Bet Specific Surface Area ◽  
Interfering Ions

Nanopillars-TiO2 thin films was obtained on a borosilicate glass substrate with (S1) and without (S2) polyethylene glycol as template. The photocatalytic behaviour of S1 and S2 thin films was assessed inthe degradation of methylene blue (MB) dye from aqueous solution under batch reactor operations. The thin films were characterized by the SEM, XRD, FTIR and AFM analytical methods. BET specific surface area and pore sizes were also obtained. The XRD data confirmed that the TiO2 particles are in its anatase mineral phase. The SEM and AFM images indicated the catalyst is composed with nanosized pillars of TiO2, evenly distributed on the surface of the substrate. The BET specific surface area and pore sizes of S1 and S2 catalyst were found to be 5.217 and 1.420 m2/g and 7.77 and 4.16 nm respectively. The photocatalytic degradation of MB was well studied at wide range of physico-chemical parameters. The effect of solution pH (pH 4.0 to 10.0) and MB initial concentration (1.0 to 10.0 mg/L) was extensively studied and the effect of several interfering ions, i.e., cadmium nitrate, copper sulfate, zinc chloride, sodium chloride, sodium nitrate, sodium nitrite, glycine, oxalic acid and EDTA in the photocatalytic degradation of MB was demonstrated. The maximum percent removal of MB was observed at pH 8.0 beyond which it started decreasing and a low initial concentration of the pollutant highly favoured the photocatalytic degradation using thin films and the presence of several interfering ions diminished the photocatalytic activity of thin films to some extent. The overall photocatalytic activity was in the order: S2 > S1 > UV. The photocatalytic degradation of MB was followed the pseudo-first-order rate kinetics. The mineralization of MB was studied with total organic carbon measurement using the TOC (total organic carbon) analysis.

Photocatalytic Degradation of 4-Nitrophenol Under Natural Sunlight with Ti-Zn Bimetallic Photocatalyst

2018 ◽  
Vol 8 (4) ◽  
pp. 642-647
Author(s):  
Manohari J ◽  
Hima Bindu G ◽  
Divya Jyothi K ◽  
Vamsi Kumar Y
Keyword(s):  
Photocatalytic Degradation ◽  
Natural Sunlight

COMPARISON ON SOLAR PHOTOCATALYTIC DEGRADATION OF ORANGE G AND NEW COCCINE USING ZINC OXIDE AS CATALYST

2018 ◽  
Vol 17 (2) ◽  
pp. 391-398
Author(s):  
Soon-An Ong ◽  
Wan Fadhilah Khalik ◽  
Li-Ngee Ho ◽  
Yee-Shian Wong ◽  
Nik Athirah Yusoff ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Photocatalytic Degradation ◽  
Orange G

Preparation of Monolithic TiO2 Aerogel via Ambient Drying and Photocatalytic Degradation of Oily Wastewater

2013 ◽  
Vol 27 (11) ◽  
pp. 1153-1158 ◽  
Author(s):  
Xing-Wang LI ◽  
Peng-Peng LÜ ◽  
Ke-Fu YAO ◽  
Hai-Lei ZHAO ◽  
Xiao-Hui ZHU
Keyword(s):  
Photocatalytic Degradation ◽  
Oily Wastewater ◽  
Ambient Drying
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