scholarly journals ZnO/VNC Material for UV-Photodegradation of Methylene Blue

2016 ◽  
Vol 67 ◽  
pp. 65-71
Author(s):  
A. Arunkumar ◽  
T. Chandrasekaran ◽  
K. Riaz Ahamed
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Redox Reactions ◽  
Chemical Activation ◽  
Degradation Study ◽  
Photo Catalysis ◽  
Uv Photodegradation ◽  
Ft Ir ◽  
Uv Visible ◽  
Catalysis Efficiency

ZnO materials act as a Photocatalytic reaction and it leads to partial or complete mineralization or decolorization of organic pollutants. Upon irradiation with UV/visible light, semiconductors catalyze undergoes redox reactions in presence of air/O2and water. In the present study Zinc oxide (ZnO) was doped with activated carbon prepared from the stem of the plant material by chemical activation namely,Vitexnegundostemcarbon (VNC). The decolourisation and degradation study of a dye namely, methylene blue (MB) was carried out to find out the efficiency of catalytic property of ZnO/VNC. The reaction was performed at 20, 40, 60 ppm of dye solution with ZnO/VNC material at 10 min interval of time. It found that the prepared ZnO / VNC composite exhibits an enhanced Photocatalytic activity for MB degradation under visible light irradiation and its photo catalysis efficiency was analyzed in specific 663 nm λ max using a UV–vis-spectrophotometer. The surface morphology and functional group present in the ZnO / VNC material was characterized by using FT-IR, SEM and XRD. The result reveals that the ZnO/VNC structure consists of irregular aggregates with rough surfaces and high photodegradation activities of ZnO/VNC on MB solutions are found to be at 20ppm. The ZnO/VNC may be used as an alternative adsorbent to remove MB from aqueous solutions.Keywords: Methylene blue (MB), ZnO / VNC, FT-IR, SEM, XRD

scholarly journals Synthesis and Photoactivity of Fe3O4/TiO2-Co as a Magnetically Separable Visible Light Responsive Photocatalyst

2018 ◽  
Vol 18 (3) ◽  
pp. 403 ◽  
Author(s):  
Eko Sri Kunarti ◽  
Indriana Kartini ◽  
Akhmad Syoufian ◽  
Karolina Martha Widyandari
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Dopant Concentration ◽  
Band Gap Energy ◽  
Methylene Blue Solution ◽  
Magnetic Photocatalyst ◽  
Blue Solution ◽  
Degradation Reaction ◽  
Visible Irradiation ◽  
Uv Visible

Synthesis of magnetic photocatalyst, Fe3O4/TiO2-Co, with characterization and photoactivity examination have been conducted. The synthesis was initiated by preparation of Fe3O4 particles using coprecipitation method. The Fe3O4 particles were then coated with TiO2-Co at a various ratio of Fe3O4:TiO2 and concentration of Co(II) dopant. The Fe3O4/TiO2-Co was characterized by FTIR, XRD, TEM, SEM-EDX, VSM, and SR UV-visible methods. Photoactivity of the Fe3O4/TiO2-Co was carried out using methylene blue as a target molecule in degradation reaction within a batch system. By using optimum conditions, the degradation of methylene blue solution was performed under exposure to UV, visible light and dark condition. Results showed that the Fe3O4/TiO2-Co formation was confirmed by the presence of Fe3O4 and anatase diffraction peaks in the X-ray diffractogram. SR UV-Vis spectra indicated that the Fe3O4/TiO2-Co was responsive to visible light. Band gap energy of the Fe3O4/TiO2-Co with dopant concentration of 1; 5; 10 and 15% were 3.22; 3.12; 3.09 and 2.81 eV, respectively. The methylene blue solution can be well photodegraded at a pH of 10 for 210 min. The Fe3O4/TiO2-Co has the highest ability to methylene blue photodegradation with dopant concentration of 10% gave degradation yield of 80.51 and 95.38% under UV and visible irradiation, respectively.

scholarly journals Synthesis of a high-surface area V2O5/TiO2–SiO2 catalyst and its application in the visible light photocatalytic degradation of methylene blue

RSC Advances ◽  
2019 ◽  
Vol 9 (42) ◽  
pp. 24368-24376 ◽  
Author(s):  
Ajay Kumar Adepu ◽  
Srinath Goskula ◽  
Suman Chirra ◽  
Suresh Siliveri ◽  
Sripal Reddy Gujjula ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Bet Surface Area ◽  
Titanium Silicate ◽  
Ft Ir ◽  
Synthesized Materials ◽  
Visible Light Photocatalytic

In the present study, we synthesized several high-surface area V2O5/TiO2–SiO2 catalysts (vanado titanium silicate, VTS). The synthesized materials are characterized by PXRD, FE-SEM/EDAX, TEM, BET-surface area, FT-IR, UV-Vis, XPS, fluorescence and photocatalytic studies.

Adsorption and UV-Visible Light Induced Degradation of Methylene Blue over ZnO Nano-Particles

nano Online ◽  
2016 ◽  
Author(s):  
Muhammad Amirul Islam ◽  
Iqbal Ahmed Siddiquey ◽  
Md. Azizur Rahman Khan ◽  
Md. Mahbubul Alam ◽  
Saiful S.M. Islam ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Nano Particles ◽  
Uv Visible

Photodecomposition of Methylene Blue by the S, Al Doped TiO2 Mesoporous Materials

2012 ◽  
Vol 499 ◽  
pp. 58-62 ◽  
Author(s):  
Yan Su ◽  
Shao You Liu ◽  
Wen Hua Tang
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Mesoporous Materials ◽  
Textural Properties ◽  
Reaction Rate Constant ◽  
X Ray Diffraction ◽  
Pseudo First Order Reaction ◽  
Reaction Route ◽  
Scanning Electron Micrography ◽  
Ft Ir

Mesoporous sulfur, aluminium doped TiO2 materials (S-Al-TiO2, S-TiO2, Al-TiO2) have been synthesized by solid-state reaction route. The textural properties of the samples are monitored by the X-ray diffraction (XRD), Scanning electron micrography (SEM), Fourier transform infrared spectroscopy (FT-IR), ultraviolet visible light spectroscopy (UV-Vis) and N2-physisorption. Moreover, compared with the pure TiO2, the photodecomposition properties of methylene blue (MB) irradiated with ultraviolet and visible light are presented on the doped TiO2 materials. It is shown that TiO2 doped by sulfur and /or aluminium are mesoporous materials, and the S and Al enter into the crystal lattice of TiO2. At 298K, the rule of pseudo-first-order reaction and excellent visible light catalytic activity are obtained in the photodecomposition of MB on the S-Al-TiO2, S-TiO2, Al-TiO2 and pure TiO2 materials. Interestingly, the reaction rate constant of MB on the S-Al-TiO2 meso- porous nanomaterial is 11.40 times irradiated with the ultraviolet than that with visible light irradiation. But there is 1.42 times corresponding to the pure TiO2. Within 50 min, ultraviolet degradation rate of MB over the S-Al-TiO2 is 98.5%.

scholarly journals Synthesis and characterisation of novel Cu(ii)-anchored biopolymer complexes as reusable materials for the photocatalytic degradation of methylene blue

RSC Advances ◽  
2020 ◽  
Vol 10 (31) ◽  
pp. 18259-18279 ◽  
Author(s):  
Murugaiyan Manimohan ◽  
Sivashanmugam Pugalmani ◽  
K. Ravichandran ◽  
Mohamed Aboobucker Sithique
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Organic Dyes ◽  
Uv Visible

Biopolymer-incorporated Cu(ii) complexes are proven to be excellent photocatalysts for the degradation of organic dyes (methylene blue) under UV-visible light.

Robust Photodegradation of Methylene Blue with the Biphenyl-Porphyrin/TiO2 Photocatalyst Under Visible Light Condition

2020 ◽  
Vol 20 (10) ◽  
pp. 6266-6273 ◽  
Author(s):  
Jiwon Ryu ◽  
Rangaraju Satish Kumar ◽  
Young-A Son
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Light Condition ◽  
Analytical Techniques ◽  
Life Time ◽  
Sem Analysis ◽  
Nmr Studies ◽  
Porphyrin Derivative ◽  
H Nmr ◽  
Ft Ir

Herewith, we approached a synthesis of new biphenyl porphyrin derivative and confirmed its structure with 1H-NMR and 13C-NMR studies, FT-IR and mass analytical methods. The porphyrin derivative grafted with TiO2 and the composite (PORBP-TiO2) was further confirmed with different analytical techniques like diffuse reflectance spectra, XRD, FT-IR, XPS, SEM analysis. PORBP-TiO2 was checked for photodegradation of methylene blue in visible light condition and degradation results were compared with bare TiO2. Our newly synthesized photocatalyst showed a very fast and efficient photocatalytical activity in comparison with bare TiO2. Fluoresence life time results also supported the strong photocatalytic activity of PORBP-TiO2. The reusability studies also showed that PORBP-TiO2 is having very good stability upto 10 cycles also. Finally we proposed a suitable catalytic diagram for PORBP-TiO2 photocatalysis.

Effect of the Ce-TiO2/Diatomite on the Photo-Catalysis Degradation of MB

2014 ◽  
Vol 789 ◽  
pp. 44-47
Author(s):  
Xiu Hong Liang ◽  
Xiao Ye Fu
Keyword(s):  
Methylene Blue ◽  
Uv Light ◽  
Sol Gel ◽  
Heat Stability ◽  
Chemical Action ◽  
Methylene Blue Degradation ◽  
Photocatalytic Effect ◽  
Photo Catalysis ◽  
Ft Ir ◽  
Physical And Chemical

In this paper, TiO2/diatomite and Ce-TiO2/diatomite were prepared by sol-gel method in order to improve the spectrum responding range and its photocatalytic effect. The obtained samples were characterized by means of X-ray Diffractometer (XRD), Scanning Electron Microscope (SEM), Infrared Absorption Spectroscopy (FT-IR) and so on, and the photocatalytic activity was evaluated by methylene blue degradation. The heat stability of TiO2/diatomite was improved by Ce-doped; TiO2 was successfully loaded on diatomite through physical and chemical action. The de-coloring ratio of methylene blue of the two composite materials were similar under UV light, Ce-TiO2/diatomite was higher under visible light, it reached to 80%, and it kept 65% after the five times repeated using of Ce-TiO2/diatomite.

scholarly journals Pyrolysis Synthesized g-C3N4for Photocatalytic Degradation of Methylene Blue

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Gang Xin ◽  
Yali Meng
Keyword(s):  
Methylene Blue ◽  
Fourier Transform ◽  
Photocatalytic Activity ◽  
Carbon Nitride ◽  
Diffuse Reflectance ◽  
Photogenerated Electron ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Uv Visible

Graphitic carbon nitride (g-C3N4) was synthesized at 520°C by the pyrolysis of cyanamide, dicyandiamide, and melamine. The samples were characterized by X–ray diffraction (XRD), UV-visible diffuse reflectance spectra, Fourier transform infrared spectroscopy (FT-IR), and elemental analyzer. The photocatalytic activity of g-C3N4was evaluated by the photodegrading experiments of methylene blue (MB). The results indicated that g-C3N4. A photocatalytic mechanism presumed the MB photodegradation over the C3N4photocatalyst is attributed to photogenerated electron impelled multistep reduction of O2.

scholarly journals Fabrication of Visible Light Active Mn-Doped Bi2WO6-GO/MoS2 Heterostructure for Enhanced Photocatalytic Degradation of Methylene Blue

2021 ◽  
Author(s):  
Noor Tahir ◽  
Muhammad Zahid ◽  
Ijaz Ahmad Bhatti ◽  
Yasir Jamil
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Visible Region ◽  
The Novel ◽  
Electron Hole ◽  
Co Catalyst ◽  
Sunlight Irradiation ◽  
Visible Light Active ◽  
Ft Ir ◽  
Mn Doped

Abstract The increase in environmental pollution has led to an increased investigation in the development of novel ternary photocatalytic systems for remediation. These Photocatalytic systems exhibit superior photocatalytic action for the removal of pollutants because of their visible light active bandgaps. A highly effective visible light active ternary heterojunction was fabricated using a hydrothermal method assisted by ultrasonication. Herein, we report the Insitu hydrothermal synthesis of Mn-doped Bi2WO6-GO/ MoS2 photocatalyst, efficiently exhibiting greater photocatalytic activity for the wastewater treatment under solar light. The binary metal sulphide (MoS2) used as a co-catalyst, acted as electron collector and Graphene oxide (GO) as a support material for interfacial electron transfer to and from bismuth tungstate and MoS2. The as-prepared samples were characterized using SEM-EDX, FT-IR, XRD, XPS, and UV–Vis techniques. The bandgap of the novel photocatalyst was found in the visible region (2.2 eV) which helped in suppressing photoinduced electron-hole pairs recombination. The ternary Mn-BMG showed 99% methylene blue removal after 60 minutes of sunlight irradiation at the optimum conditions of pH 8, catalyst dose 50 mg/100ml and initial MB concentration of 10ppm under sunlight irradiation. The Mn-BMG has proved to be an effective sunlight active photocatalyst that can be reused without substantial loss in photocatalytic efficiency.

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