scholarly journals Bifunctional g-C3N4/WO3 Thin Films for Photocatalytic Water Purification

Water ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2439 ◽  
Author(s):  
Maria Antoniadou ◽  
Michalis K. Arfanis ◽  
Islam Ibrahim ◽  
Polycarpos Falaras
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Dye Degradation ◽  
Active Species ◽  
Blue Dye ◽  
Pseudo First Order Reaction ◽  
Uv Illumination ◽  
Bilayered Structure ◽  
Reaction Constants

A bifunctional thin film photocatalyst consisting of graphitic carbon nitride on tungsten trioxide (g-C3N4/WO3) is introduced for the improvement of photocatalytic activity concerning hexavalent chromium reduction and methylene blue dye removal in water, compared to the bare, widely used WO3 semiconductor. A bilayered structure was formed, which is important for the enhancement of the charge carriers’ separation. The characterization of morphological, structural, optoelectronic, and vibrational properties of the photocatalysts permitted a better understanding of their photocatalytic activity for both dye degradation and Cr+6 elimination in water and the analysis of the photocatalytic kinetics permitted the determination of the corresponding pseudo-first-order reaction constants (k). Trapping experiments performed under UV illumination revealed that the main active species for the photocatalytic reduction of Cr+6 ions are electrons, whereas in the case of methylene blue azo-dye (MB) oxidation, the activation of the corresponding photocatalytic degradation comes via both holes and superoxide radicals.

Enhanced photocatalytic activity of ethylenediamine-assisted tin oxide (SnO2) nanorods for methylene blue dye degradation

2020 ◽  
Vol 276 ◽  
pp. 128173 ◽  
Author(s):  
K. Bhuvaneswari ◽  
Ba-Son Nguyen ◽  
Van-Huy Nguyen ◽  
Vu-Quynh Nguyen ◽  
Quang-Hung Nguyen ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Tin Oxide ◽  
Dye Degradation ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Sno2 Nanorods

scholarly journals Synthesis of silver-loaded ZnO nanorods and their enhanced photocatalytic activity and photoconductivity study

2019 ◽  
Vol 18 (6) ◽  
pp. 1503-1511 ◽  
Author(s):  
Prashant V. Pimpliskar ◽  
Shrinivas C. Motekar ◽  
Govind G. Umarji ◽  
Wonyoung Lee ◽  
Sudhir S. Arbuj
Keyword(s):  
Methylene Blue ◽  
Silver Nanoparticles ◽  
Photocatalytic Activity ◽  
Dye Degradation ◽  
Zno Nanorods ◽  
Blue Dye ◽  
Methylene Blue Dye

The photocatalytic activity of ZnO nanorods towards methylene blue dye degradation was enhanced by loading 0.5, 1, 5, and 10 mol% silver nanoparticles on the ZnO.

Enhanced Photocatalytic Activity of St-ZnO Nanorods for Methylene Blue Dye Degradation

2022 ◽  
pp. 131637
Author(s):  
Devaraj Bharathi ◽  
Thiruvengadam Nandagopal Jaya Ganesh ◽  
Ranjithkumar Rajamani ◽  
Soumya Pandit ◽  
Deepak Kumar ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Dye Degradation ◽  
Zno Nanorods ◽  
Blue Dye ◽  
Methylene Blue Dye

scholarly journals Effect of calcination temperature, pH and catalyst loading on photodegradation efficiency of urea derived graphitic carbon nitride towards methylene blue dye solution

RSC Advances ◽  
2019 ◽  
Vol 9 (27) ◽  
pp. 15381-15391 ◽  
Author(s):  
Devina Rattan Paul ◽  
Rishabh Sharma ◽  
S. P. Nehra ◽  
Anshu Sharma
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Carbon Nitride ◽  
Dye Degradation ◽  
Synthesis Temperature ◽  
Catalyst Loading ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Reaction Conditions ◽  
Photodegradation Efficiency

The appropriate synthesis temperature and optimized photodegradation reaction conditions result in an appreciable enhancement of the photocatalytic activity of urea derived innate g-C3N4 towards MB dye degradation.

Photocatalytic activity of TiO2nanomaterials for methylene blue dye degradation

2016 ◽  
Author(s):  
Deuk Yong Lee ◽  
Siwon Son ◽  
Min-Seok Jeon ◽  
Myung-Hyun Lee ◽  
Bae-Yeon Kim
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Dye Degradation ◽  
Blue Dye ◽  
Methylene Blue Dye

scholarly journals Photocatalytic Performance of a Novel Sr-Ce-TiO2/HAp for Degradation of Methylene Blue Dye in the Presence of Visible Light

2021 ◽  
Author(s):  
Alireza Esmaeilzadeh ◽  
Felora Heshmatpour
Keyword(s):  
Methylene Blue ◽  
Surface Area ◽  
Energy Gap ◽  
Blue Dye ◽  
X Ray Diffraction ◽  
Pseudo First Order Reaction ◽  
Visible Radiation ◽  
X Ray ◽  
Bet Method

Abstract In this study, Sr-Ce-TiO2/HAp as a novel and efficient nanocomposite was synthesized and characterized by Fourier transform infrared spectroscopy (FTIR), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), scanning electron microscopy (SEM), and surface area determination of porous using the Brunauer–Emmett–Teller (BET) method and degradation of methylene blue under visible radiation was investigated. Evaluations showed that doped with metal cations and the presence of hydroxyapatite reduced energy gap, increased surface area, increased adsorption and decreased electron-hole recombination. The results also showed that more than 92% of methylene blue was removed within 100 min. The pseudo-first order reaction synthetic was obtained.

Synthesis and Characterization of BaAl2O4 Catalyst and its Photocatalytic Activity Towards Degradation of Methylene Blue Dye

2019 ◽  
Vol 233 (8) ◽  
pp. 1161-1181 ◽  
Author(s):  
Shifa Wang ◽  
Huajing Gao ◽  
Leiming Fang ◽  
Yong Wei ◽  
Yanwu Li ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Gamma Ray ◽  
Energy Gap ◽  
Active Species ◽  
High Photocatalytic Activity ◽  
Blue Dye ◽  
Optical Energy Gap ◽  
Optical Fluorescence ◽  
Flake Structure

Abstract Hexagonal BaAl2O4 catalyst has been prepared using a gamma-ray irradiation assisted polyacrylamide gel method. The catalysts synthesized at different calcining temperatures were analyzed to insight into their effects on the structural, crystalline, surface morphology, color, optical, fluorescence and photocatalytic properties of the hexagonal BaAl2O4 catalyst. Increasing the calcining temperature has obvious influences on the crystallinity, color, optical properties and the formation of the hexagonal BaAl2O4 catalyst. The optical energy gap (Eg) value of the hexagonal BaAl2O4 catalyst increases with the increasing of calcining temperature. TEM image of the pure hexagonal BaAl2O4 catalyst shows a morphology of flake structure and aggregation. Raman spectroscopy of the pure hexagonal BaAl2O4 catalyst exhibits four luminescent background peaks at 400, 415, 428 and 445 nm mainly due to the oxygen vacancies (VO), Ba vacancies (VBa) and some color centers exists in the BaAl2O4 sample. A comparison of photocatalytic activity among samples for degradation of methylene blue (MB) dye indicates that the pure hexagonal BaAl2O4 catalyst exhibits highest photocatalytic activity under the irradiation of both visible and ultraviolet light. Based on the fluorescence experiment, electrochemical and active species tests, the high photocatalytic activity of the pure hexagonal BaAl2O4 catalyst to be related to hole (h+) and hydroxyl radical (⋅OH) and also to the defects in the sample.

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