scholarly journals Enhanced Performance of Electrospun Nanofibrous TiO2/g-C3N4 Photocatalyst in Photocatalytic Degradation of Methylene Blue

Catalysts ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 880 ◽  
Author(s):  
Feidias Bairamis ◽  
Ioannis Konstantinou ◽  
Dimitrios Petrakis ◽  
Tiverios Vaimakis
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Performance ◽  
Dye Degradation ◽  
Rutile Phase ◽  
Blue Dye ◽  
Oh Radicals ◽  
Environmental Technology ◽  
Light Region ◽  
Technology Applications ◽  
One Step

TiO2/g-C3N4 (GNT) fibers with 1%, 2.5% and 5% (wt%) ratios have been synthesized via one-step electrospinning using polyvinylpyrrolidone (PVP) polymer. Results showed mesoporous fibrous catalysts consisted of anatase (80.0–85.1%) and rutile phase (14.9–20.0%), with diameter between 200–300 nm and band gap lower than 3.0 eV confirming the absorption shift to visible-light region. The formation of •OH radicals and methylene blue dye degradation increases as the g-C3N4 doping percent also increases, following the trend ΤiO2 < GNT1% ≈ GNT2.5% < GNT5%. A z-scheme mechanism is attributed to the photocatalytic performance confirming the potential for green chemistry and environmental technology applications.

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 Characterization of Pure Rutile Titania Nanoparticle Prepared by Feasible Method for Coatings and Visible Light-Driven Dye Removal Application

Coatings ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1150
Author(s):  
Jothi Ramalingam Rajabathar ◽  
Hamad A. Al-Lohedan ◽  
Selvaraj Arokiyaraj ◽  
Zuheir A. Issa ◽  
Chandra Sekhar Dash ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Electron Microscope ◽  
Visible Light ◽  
Dye Degradation ◽  
Anatase Phase ◽  
Rutile Phase ◽  
Titania Nanoparticles ◽  
Critical Parameters ◽  
Blue Dye ◽  
Spectroscopic Techniques

The pure phase of rutile titanium dioxide or titania (R-TiO2) was prepared by means of a strong acidic sol–gel process followed by treatment using a hydrothermal method. The as-prepared titania nanoparticles existed purely in the rutile phase instead of the mixed anatase phase of the respective titania (R-TiO2). The optimized reaction condition and precursor usage were the critical parameters for the formation of the particle size and uniform crystallinity of the rutile phase of TiO2 nanoparticle fabrication. XRD (X-ray diffraction), and Raman spectroscopic techniques were utilized to confirm the formation of the pure rutile phase of titania. SEM (scanning electron microscope) and TEM (Transmission electron microscope) images showed the cauliflower-like morphology of the as-prepared R-TiO2; reduced particle sizes of below 5 nm were observed and confirmed through high resolution images. The catalytic activity of the as-prepared R-TiO2 was tested under visible light irradiation for methylene blue dye degradation reactions. Dye degradation occurred very effectively, even at higher concentrations of methylene blue (MB), at reduced time intervals from 5 to 3 h of reaction time. The as-prepared rutile phase of pure titania nanoparticles was applied in a catalysis application for the purpose of inducing various types of organic dye degradation or catalytic transformation in the presence of visible light.

Photo Catalytic Activity of Anatase TiO2/PVA Film Coated Glass Plate

2012 ◽  
Vol 584 ◽  
pp. 396-400 ◽  
Author(s):  
Aravind Naga Revuru ◽  
Nagarajan Padmavathy ◽  
Angappan Sheela ◽  
Swamiappan Sasikumar
Keyword(s):  
Methylene Blue ◽  
Dye Degradation ◽  
Anatase Phase ◽  
Glass Plate ◽  
Photocatalytic Decomposition ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Contributing Factors ◽  
Tio2 Sample ◽  
Tlc Plates

The major cause of surface and ground water contamination is due to effluent from dyeing industries. The discharged effluent chemicals inhibit light penetration into water bodies and some are considered to be carcinogenic. In this study, the photocatalytic decomposition of the synthetic dye, methylene blue was investigated in the presence of activated TiO2. The TiO2 sample was characterized by using XRD to analyze the presence of anatase and rutile phases. The dye degradation was monitored as a change in absorbance by UV-Visible spectrophotometer. The contributing factors towards dye degradation include both the dye concentration as well as the quantity of TiO2 used. Different quantities of TiO2 in anatase phase was taken and activated under UV radiation for 15 min. and subsequently coated on to TLC plates using 5% polyvinyl alcohol as a binding agent. This photocatalytic plate was kept in the methylene blue dye solution and exposed to sunlight. The results shows that 57% of the 30ppm methylene blue dye gets degraded within 75min., when exposed to UV activated TiO2 in presence of natural sunlight.

Two pure MOF-photocatalysts readily prepared for the degradation of methylene blue dye under visible light

2018 ◽  
Vol 47 (12) ◽  
pp. 4251-4258 ◽  
Author(s):  
Ming Zhang ◽  
Liwen Wang ◽  
Tianyu Zeng ◽  
Qigao Shang ◽  
Hong Zhou ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Coordination Polymers ◽  
Dye Degradation ◽  
Blue Dye ◽  
Methylene Blue Dye

Two 3D coordination polymers, bridged by 4,4′-bipyridine, were readily synthesized and fully characterized. As efficient photocatalysts in dye degradation under visible light, the mechanism and stability were studied.

Synergetic photocatalytic effect of high purity ZnO pod shaped nanostructures with H2O2 on methylene blue dye degradation

2020 ◽  
Vol 845 ◽  
pp. 156333 ◽  
Author(s):  
Ahad Mohammadzadeh ◽  
Mohammad Khoshghadam-Pireyousefan ◽  
Bahram Shokrianfard-Ravasjan ◽  
Maziyar Azadbeh ◽  
Hadi Rashedi ◽  
...  
Keyword(s):  
Methylene Blue ◽  
High Purity ◽  
Dye Degradation ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Photocatalytic Effect

scholarly journals Tuning the Morphological Structure and Photocatalytic Activity of Nitrogen-Doped (BiO)2CO3by the Hydrothermal Temperature

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Chongjun Wang ◽  
Zaiwang Zhao ◽  
Bin Luo ◽  
Min Fu ◽  
Fan Dong
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Photocatalytic Performance ◽  
Morphological Structure ◽  
Hydrothermal Temperature ◽  
Nitrogen Doped ◽  
Light Region ◽  
Efficient Performance ◽  
One Step

Various nitrogen-doped hierarchical (BiO)2CO3nanosheets architectures were synthesized by a facile one-step template-free hydrothermal method through controlling the hydrothermal temperature (HT). The as-synthesized samples were characterized by XRD, SEM, FT-IR, XPS, and UV-vis DRS. The photocatalytic activity of the samples was evaluated towards degradation of NO at ppb level in air under visible light (VIL). It was found that HT acted as a crucial factor in determining the morphology of the samples. The rosa chinensis-like, red camellia-like, and lamina-like of nitrogen-doped (BiO)2CO3(N-BOC) micro-/nanostructures can be selectively fabricated under hydrothermal temperatures of 150, 180, and 210°C. The thickness of the nanosheets was in direct proportion to the increasing HT. Nitrogen-doping can extend the light absorption spectra of (BiO)3CO3to visible light region and enhance the VIL photocatalytic activity. Especially, the red camellia-like N-BOC-180 exhibited the highest photocatalytic performance, superior to the well-known VIL-driven photocatalyst C-doped TiO2and N-doped TiO2. The high photocatalytic performance of N-BOC was attributed to the synergetic effects of enhanced visible light absorption, multiple light-reflections between the nanosheets, and accelerated transfer of reactants and product. This research could provide new insights to the development of excellent photocatalyst with efficient performance for pollution control.

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