Photocatalytic Degradation of Methylene Blue Dye over Copper(II) Complex Nanoparticle Catalyst.

2021 ◽  
pp. 138-142
Author(s):  
Hassan Wafi Garba ◽  
Abubakar Garba Ashiru ◽  
Rooshan Watanpal ◽  
Mohammed Bello ◽  
Kasimu Abubakar ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Single Phase ◽  
Uv Light ◽  
Blue Dye ◽  
Spectroscopic Techniques ◽  
Methylene Blue Dye ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
Physicochemical And Structural Properties ◽  
Nanoparticle Catalyst

Abstract—A novel copper(II) complex nanoparticles catalyst was synthesized via precipitation and calcination. The catalyst was applied for the degradation of methylene blue under UV light irradiation. The catalyst was characterized for its physicochemical and structural properties by XRD, SEM, TEM and FT-IR spectroscopic techniques. XRD studies revealed that the particles were monoclinic single phase crystalline structure, the morphology of the nanostructure was confirmed by SEM while the TEM studies revealed that the particles were FCC. FTIR spectra showed the presence of diverse vibrational functional groups. Photolysis of the methylene blue dye indicates no degradation after 1 hour reaction, while the addition of the copper(II) complex nanoparticles catalyst resulted in the decolouration of the dye by ~94%. The efficiency of the catalyst was attributed to the nanoparticle’s morphology.

Synthesis of Adsorbent from Bagasse for Methylene Blue Adsorption

2021 ◽  
Vol 7 (2) ◽  
pp. 188-195
Author(s):  
Nurhasni Nurhasni ◽  
Sariana Harahap ◽  
Ahmad Fathoni ◽  
Hendrawati Hendrawati
Keyword(s):  
Methylene Blue ◽  
Textile Industry ◽  
Contact Time ◽  
Ph Effect ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Batch Method ◽  
Homogeneous Surface ◽  
Dyeing Process ◽  
Ft Ir

The ability of bagasse adsorbents to adsorb methylene blue without activation using 0.5 M H2SO4 solution was examined. Methylene blue is widely used in the textile industry because it produces bright colors, and the dyeing process is fast and easy. This research aims to determine the optimum adsorption conditions, namely the variations in contact time, dye concentration, adsorbent mass, and pH effect on methylene blue, which were carried out using the batch method. Furthermore, the adsorbents were characterized by FT-IR and SEM. The optimum state of the bagasse adsorbent to adsorb methylene blue dye has a mass of 0.5 grams, a contact time of 30 minutes, a concentration of 50 ppm, and a pH of 5. The character of the adsorbent after activation with H2SO4 was better than without activation. The highest adsorption efficiency of methylene blue dye in the batch method was 99.67%. The FTIR spectrum of the bagasse adsorbent showed OH, C-H, C=O, C=C, and C-O functional groups. The adsorption isotherm model for methylene blue dye follows the Langmuir isotherm since the graph obtained is linear with the correlation coefficient (R2) = 1, where the adsorbent has a homogeneous surface.

Synthesis of TiO2 Nanoparticles Using Acinetobacter baumanii for Photocatalytic Application

2020 ◽  
Vol 979 ◽  
pp. 175-179
Author(s):  
M. Nagalakshmi ◽  
N. Anusuya ◽  
S. Karuppuchamy
Keyword(s):  
Methylene Blue ◽  
Titanium Dioxide ◽  
Uv Light ◽  
Blue Dye ◽  
Biological Method ◽  
Methylene Blue Dye ◽  
Acinetobacter Baumanii ◽  
Uv Light Irradiation ◽  
Photocatalytic Application ◽  
Vis Spectroscopy

Titanium dioxide (TiO2) nanoparticles have been successfully prepared by biological method and the resulting material was characterized by XRD, FTIR, SEM, EDAX and UV-Vis spectroscopy. The synthesized TiO2 materials successfully degraded the methylene blue dye (MB) under UV light irradiation.

scholarly journals Synthesis and Characterization of CeO2-SiO2Nanoparticles by Microwave-Assisted Irradiation Method for Photocatalytic Oxidation of Methylene Blue Dye

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
R. M. Mohamed ◽  
E. S. Aazam
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Photocatalytic Oxidation ◽  
Uv Light ◽  
Irradiation Time ◽  
High Surface ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Microwave Assisted ◽  
Small Pore

CeO2-SiO2nanoparticles were synthesized for the first time by a facile microwave-assisted irradiation process. The effect of irradiation time of microwave was studied. The materials were characterized by N2adsorption, XRD, UV-vis/DR, and TEM. All solids showed mesoporous textures with high surface areas, relatively small pore size diameters, and large pore volume. The X-ray diffraction results indicated that the as-synthesized nanoparticles exhibited cubic CeO2without impurities and amorphous silica. The transmission electron microscopy (TEM) images revealed that the particle size of CeO2-SiO2nanoparticles, which were prepared by microwave method for 30 min irradiation times, was around 8 nm. The photocatalytic activities were evaluated by the decomposition of methylene blue dye under UV light irradiations. The results showed that the irradiation under the microwave produced CeO2-SiO2nanoparticles, which have the best crystallinity under a shorter irradiation time. This indicates that the introduction of the microwave really can save energy and time with faster kinetics of crystallization. The sample prepared by 30 min microwave irradiation time exhibited the highest photocatalytic activity. The photocatalytic activity of CeO2-SiO2nanoparticles, which were prepared by 30 min irradiation times was found to have better performance than commercial reference P25.

scholarly journals Comparison of the structural and photo-catalytic properties of nanostructured Fe3O4/TiO2 core-shell composites synthesized by ultrasonic and Stöber methods

2020 ◽  
Vol 52 (4) ◽  
pp. 415-432
Author(s):  
Faezeh Parast ◽  
Mehdi Montazeri-Pour ◽  
Masoud Rajabi ◽  
Fatemeh Bavarsiha
Keyword(s):  
Electron Microscopy ◽  
Methylene Blue ◽  
Catalytic Properties ◽  
Uv Light ◽  
Oxide Coating ◽  
Blue Dye ◽  
Core Shell ◽  
Methylene Blue Dye ◽  
X Ray ◽  
Titanium Oxide Coating

In the present research, Fe3O4/TiO2 magnetic photo-catalytic nanocomposites with a core/shell structure were successfully synthesized using two techniques of ultrasonic and St?ber. In this way, iron oxide (II, III) nanoparticles as soft magnetic cores of this composite were prepared by utilizing a chemical method assisted by ultrasound with a Fe+3/Fe+2 molar ratio of 1.5 under the nitrogen atmosphere. Thereafter, titanium oxide coating was performed on Fe3O4 nanoparticles by using tetrabutyl orthotitanate (TBOT) and titanium isopropoxide (TTIP) precursors. The resultant nanostructures were characterized by means of X-ray powder diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, energy dispersive X-ray (EDX) analysis, vibrating sample magnetometer (VSM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Through findings obtained from TEM examinations, the formation of core/shell nanostructure was confirmed in the prepared Fe3O4/TiO2 composites. Analysis of magnetic properties revealed that titanium oxide coating on iron oxide nanoparticles reduces saturation magnetization (Ms). The values of saturation magnetization for Fe3O4 powder and Fe3O4/TiO2 nanocomposite powders achieved via ultrasonic and St?ber methods were 60, 23 and 9 emu/g, respectively. Photo-catalytic properties of Fe3O4/TiO2 nanostructures were evaluated by the use of methylene blue dye under UV light. Results indicated that Fe3O4/TiO2 composite obtained by the St?ber method has a better photo-catalytic property as well as a decreased but acceptable magnetic separation. Degradation of methylene blue dye in the presence of photo-catalytic powder prepared by ultrasonic and St?ber procedures was 61 and 69 %, respectively, within 90 minutes of UV light exposure.

scholarly journals Synthesis of Metal/Silica/Titania Composites for the Photocatalytic Removal of Methylene Blue Dye

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Sana Ahmad ◽  
Arfa Saeed
Keyword(s):  
Methylene Blue ◽  
Organic Pollutant ◽  
Sol Gel ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Reaction Conditions ◽  
Structure Morphology ◽  
Photocatalytic Removal ◽  
Ft Ir ◽  
Metal Doped

The present work deals with the synthesis of the metal-doped titanium dioxide/silica composite by using the sol-gel method. The structure, morphology, and composition of the prepared samples were characterized by using Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). The prepared composites were used for the photodegradation of methylene blue dye in sunlight. Different parameters like pH, time, and catalytic concentration were varied to optimize the reaction conditions. Maximum 99.8% degradation was observed with the Ni-doped composite. The results indicate extraordinary efficiency of all metal-doped composites for the removal of the harmful organic pollutant like methylene blue.

scholarly journals Synthesis of Cellulose Acetate-Polystyrene Membrane Composites from Pineapple Peel Wastes for Methylene Blue Removal

Al-Kimia ◽  
2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Irvan Maulana Firdaus ◽  
Febiyanto Febiyanto ◽  
Try Fitriany ◽  
Lely Zikri Zulhidayah ◽  
Dyah Ayu Septiarini ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Cellulose Acetate ◽  
Composite Membrane ◽  
Blue Dye ◽  
Stress And Strain ◽  
Methylene Blue Dye ◽  
Pineapple Peel ◽  
Methylene Blue Removal ◽  
Ft Ir

The cellulose acetate-polystyrene or CA-PS composite membrane from pineapple peel waste for methylene blue removal has been conducted. The steps were nata de pina preparation, cellulose acetylation process, preparation, and characterization of CA-PS composite membrane. The CA-PS composite membrane was characterized using Fourier Transform Infrared (FT-IR), Scanning Electron Microscopy (SEM), tensile and strain examination, respectively. The as-synthesized CA-PS composite membrane has the characteristic of rejection ability was about 29.96% with the pore size, membrane modulus, stress and strain were 1.9 μm, 12.48 MPa, 31.91 MPa, and 2.55, respectively. In this research, CA-PS composite membrane from pineapple peel waste was successfully removed the methylene blue dye even needs improvement to enhance its capability in rejection efficiency as same as membrane characteristics.   

Physical Properties of Fe3+/TiO2 Nanoparticles and Photocatalytic Disinfection of Foodborne Microorganisms

2018 ◽  
Vol 17 (3) ◽  
pp. 312-321
Author(s):  
Long Men ◽  
Zhan Ge ◽  
Sun Meng-Yun ◽  
Zhuang Hong ◽  
Wang Ran
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Physical Properties ◽  
Salmonella Typhimurium ◽  
Uv Light ◽  
Meat Products ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Photocatalytic Disinfection

In this article, we studied the preparation of Fe3+/TiO2 nanoparticles and the photocatalytic disinfection effects of two typical foodborne microorganisms, a gram-negative bacterium (Salmonella typhimurium) and a gram-positive bacterium (Listeria monocytogenes), in meat products. The physical properties of Fe3+/TiO2 nanoparticles embedded with various levels of Fe3+ (0%–10%) and synthesized through an impregnation process were investigated using X-ray diffraction, transmission electron microscopy, and UV-vis spectrophotometer, and their photocatalytic activities were evaluated by measuring the degradation of methylene blue dye and the disinfection of foodborne pathogens S. typhimurium and L. monocytogenes under visible light and UV light. Fe3+ ions were found to be scattered across TiO2 surfaces or across TiO2 crystal lattices as microcrystals. However, the capacity for TiO2 nanoparticles to absorb visible light was significantly enhanced after they were embedded with.Fe3+/TiO2 nanoparticles with molar ratios (R) of Fe3+ to TiO2 of 0.001:1, 0.005:1, and 0.01:1 exhibited higher levels of methylene blue dye photocatalytic degradation and higher levels of foodborne pathogen photocatalytic disinfection than the TiO2 control. However, nanoparticles containing >1% Fe3+ exhibited lower levels of photocatalytic activity than the TiO2 control. Salmonella typhimurium was more resistant to the nano-Fe3+/TiO2 treatment than L. monocytogenes under visible and UV light conditions. These experiments demonstrate that embedding Fe3+ in TiO2 nanoparticles does not remarkably influence the TiO2 nanoparticle size or structure. Embedding appropriate levels of Fe3+ content (0.1%–1%) can enhance the photocatalytic activity of TiO2 nanoparticles.

scholarly journals Sodium Tungsten Oxide Bronze Nanowires Bundles in Adsorption of Methylene Blue Dye under UV and Visible Light Exposure

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1322
Author(s):  
Kunyapat Thummavichai ◽  
Le Anh Thi ◽  
Swee-Yong Pung ◽  
Oluwafunmilola Ola ◽  
Mian Zahid Hussain ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Uv Light ◽  
Light Exposure ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Adsorption Effect ◽  
Sodium Tungsten ◽  
Oxide Bronze ◽  
Enhanced Adsorption

This paper describes the analysis and characterization of NayWOx bronze nanowires bundles and evaluation of their effective adsorption of methylene blue dye (MB). The Na-doped WOx bronze nanowires bundles were first synthesized via a simple solvothermal method, which were then fully characterized by using different techniques including TEM, XRD, XPS and UV-Vis, to validate the successful Na+ insertion into the WOx framework. The adsorption activities of the resulting NayWOx bronze nanowires bundles, compared with the undoped WOx form, were investigated by evaluating the adsorption effect on methylene blue under both UV and visible light irradiations. An enhanced adsorption performance of the Na-doped WOx bronze samples was recorded, which demonstrated a 90% of removal efficiency of the MB under different conditions (dark, visible and UV light). Moreover, the NayWOx bronze samples also offered a 4 times better kinetic rate of MB removal than the plain WOx nanowires.

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