Enhanced Photocatalytic Performance of the Graphene-V2O5 Nanocomposite in the Degradation of Methylene Blue Dye under Direct Sunlight

2015 ◽  
Vol 7 (27) ◽  
pp. 14905-14911 ◽  
Author(s):  
Mahalingam Shanmugam ◽  
Ali Alsalme ◽  
Abdulaziz Alghamdi ◽  
Ramasamy Jayavel
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Performance ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Direct Sunlight

Coloading of TiO2 and C3N4 on kaolinite nanotubes for obviously improved photocatalytic performance in degradation of methylene blue dye

2018 ◽  
Vol 230 ◽  
pp. 32-35 ◽  
Author(s):  
Jinan Niu ◽  
Aichun Wu ◽  
Duoxiao Wang ◽  
Lu Zhou ◽  
Shenghui Zhang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Performance ◽  
Blue Dye ◽  
Methylene Blue Dye

Sol-Gel Sonochemical Triton X-100 Templated Synthesis of Fe2O3/ZnO Nanocomposites Toward Developing Photocatalytic Degradation of Organic Pollutants

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Doaa A. Ali ◽  
Emad E. El-Katori ◽  
Ensaf Aboul Kasim
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Point Of Zero Charge ◽  
Blue Dye ◽  
Reduction Peak ◽  
Methylene Blue Dye ◽  
Triton X ◽  
The Impact

Abstract The existing work emphasizes mainly to advance the low surface features of zinc oxide (ZnO) by dispersion of Fe2O3 nanoparticles on the ZnO surface fabricated via a sol-gel route with Triton X-100 as a structure and capping agent to synthesis a novel series of Fe2O3/ZnO nanocomposites (NCs) with novel features assembling between the two nanoparticle materials. Fe2O3/ZnO is an effective semiconductor which has higher efficiency in the removal of numerous organic dyes and other pollutants. The NCs was characterized via HRTEM, XRD, FTIR, BET, RS and UV–Vis DRS. A photocatalytic performance of the fabricated Fe2O3/ZnO nanocomposites was estimated by continual degradation of the methylene blue dye (MB) as an organic pollutant in aqueous solution. The comparison between pure ZnO (NPs) and Fe2O3/ZnO (NCs) show advanced photocatalytic performance under both UV and sunlight irradiation. The impact of several parameters, for example, dopant contents, photocatalytic dosage, pH, chemical oxygen demand (COD) and point of zero charge (PZC) were evaluated and discussed. In addition, the protective species’ role was estimated via a radical scavenger route. The photo-degradation data shown that the Fe2O3/ZnO (10 wt%) semiconductor is the fit photocatalyst between the fabricated semiconductors for the methylene blue dye (MB) degradation. The intensity reduction peak of UV emission and the intensity increment of visible emission were led to the lessening in recombination between electrons and holes which are finally responsible for the maximum photocatalytic performance of Fe2O3/ZnO nanocomposites. The gained results confirmed that the dopant content is the major factor in photocatalytic degradation activity.

Photocatalytic Performance on Visible Light Induced ZnS QDs-MgAl Layered Double Hydroxides Hybrids for Methylene Blue Dye Degradation

2018 ◽  
Vol 3 (47) ◽  
pp. 13419-13426 ◽  
Author(s):  
Kandasamy Bhuvaneswari ◽  
Govindasamy Palanisamy ◽  
Thangavelu Pazhanivel ◽  
Ganapathi Bharathi ◽  
Devaraj Nataraj
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Layered Double Hydroxides ◽  
Photocatalytic Performance ◽  
Dye Degradation ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Double Hydroxides

scholarly journals Synthesis, Characterization and Enhanced Visible Light Photocatalytic Performance of ZnWO4-NPs@rGO Nanocomposites

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1536
Author(s):  
Norah Alhokbany ◽  
Saad M. Alshehri ◽  
Jahangeer Ahmed
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Photocatalytic Performance ◽  
Neutral Medium ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Reduced Graphene ◽  
Multiple Cycles ◽  
Visible Light Photocatalytic ◽  
Catalytic Performances

ZnWO4 nanoparticles on reduced graphene oxide (ZnWO4-NPs@rGO) nanocomposites were synthesized using the hydrothermal method. Structural, morphological, optical, and photocatalytic studies of the ZnWO4-NPs@rGO nanocomposites were successfully investigated. Photo-catalytic performances of the ZnWO4-NPs@rGO nanocomposites were examined for the degradation of hazardous methylene blue dye (HMBD) in a neutral medium. ZnWO4-NPs@rGO nanocomposites show superior photo-catalytic performances over pure ZnWO4 nanoparticles. ZnWO4-NPs@rGO nanocomposites degrade ~98% dye while pure ZnWO4 nanoparticles degrade ~53% dye in 120 min. The prepared nanocomposites also show excellent recycled photo-catalytic efficiencies over multiple cycles.

Using of modified-bentonite as low-cost sorbent for removal of methylene blue dye from aqueous solution

2020 ◽  
Vol 27 (2) ◽  
pp. 45-54
Author(s):  
Saraa Muwafaq Ibrahim ◽  
Ziad T. Abd Ali
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Silanol Group ◽  
Infrared Spectrometry ◽  
Blue Dye ◽  
Ammonium Bromide ◽  
Vibration Band ◽  
Order Kinetic ◽  
Methylene Blue Dye ◽  
Modified Bentonite

Batch experiments have been studied to remove methylene blue dye (MB) from aqueous solution using modified bentonite. The modified bentonite was synthesized by replacing exchangeable calcium cations in natural bentonite with cationic surfactant cetyl trimethyl ammonium bromide (CTAB). The characteristics of modified bentonite were studied using different analysis such as Scanning electronic microscopy (SEM), Fourier transform infrared spectrometry (FTIR) and surface area. Where SEM shows the natural bentonite has a porous structure, a rough and uneven appearance with scattered and different block structure sizes, while the modified bentonite surface morphology was smooth and supplemented by a limited number of holes. On other hand, (FTIR) analysis that proved NH group aliphatic and aromatic group of MB and silanol group are responsible for the sorption of contaminate. The organic matter peaks at 2848 and 2930 cm-1 in the spectra of modified bentonite which are sharper than those of the natural bentonite were assigned to the CH2 scissor vibration band and the symmetrical CH3 stretching absorption band, respectively, also the 2930 cm-1 peak is assigned to CH stretching band. The batch study was provided the maximum removal efficiency (99.99 % MB) with a sorption capacity of 129.87 mg/g at specified conditions (100 mg/L, 25℃, pH 11 and 250rpm). The sorption isotherm data fitted well with the Freundlich isotherm model. The kinetic studies were revealed that the sorption follows a pseudo-second-order kinetic model which indicates chemisorption between sorbent and sorbate molecules.

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