scholarly journals Removing MBD Using Fe2O3 NPs Modified by FeCl3 (0.1 M and 0.3 mM) With Myrtle Leaf Extract As Environmental Application

2021 ◽  
Author(s):  
Wisam Aziz ◽  
Muslim Abid ◽  
Aya Jumaa
Keyword(s):  
Methylene Blue ◽  
Iron Oxide ◽  
Leaf Extract ◽  
Average Particle Size ◽  
Blue Dye ◽  
Average Particle ◽  
Halogen Lamp ◽  
X Ray Diffraction ◽  
Environmental Application ◽  
Methylene Blue Degradation

Abstract In this study, iron oxide nanoparticles were synthesized using FeCl3 (0.1 M and 0.3 M) with myrtle leaf extract for of methylene blue dye (MBD) degradation under visible light irradiation (100-watt halogen lamp) as environmental application. X-ray diffraction analysis showed the polycrystalline structure of Fe2O3 material with miller indices confirmed the presence of iron oxide with average crystalline sizes (15.59-16.8 nm) synthesized by (0.1M - 0.3mM) concentrations of FeCl3. Field emission-scanning electron microscopy revealed rods-like and spherical shapes of Fe2O3 nanoparticles, with an average particle size of 25 to 67 nm, covered the whole top surface of structure. Moreover, the change of the color of the iron oxide NPs from brown to dark brown enhances the transformation of the properties of the material obtained by adding the biomass which gives the absorbance peaks around 265-350 nm and energy band gaps (3 and 3.7 eV) using UV/VIS spectrometer. The methylene blue degradation efficiencies of Fe2O3 NPs prepared by plant extract and FeCl3 with concentrations (0.1 M and 0.3 mM) were 86.3% after 150 min and 90% after 120 min respectively.

Effect of Concentration of Iron Oxide on Crystallization Behavior in Leadless Iron Oxide Crystalline Glaze

2012 ◽  
Vol 554-556 ◽  
pp. 18-22
Author(s):  
Supakorn Silakate ◽  
Anucha Wannagon ◽  
Apinon Nuntiya
Keyword(s):  
Iron Oxide ◽  
Nepheline Syenite ◽  
Crystallization Behavior ◽  
Raw Materials ◽  
Average Particle Size ◽  
Average Particle ◽  
Oxide Content ◽  
Iron Oxide Content ◽  
X Ray Diffraction ◽  
X Ray

The objectives of this study were to prepare leadless crystalline glazes from iron oxide by using low temperature firing (1,100°C) and to study the effect of concentration of iron oxide on the phase composition of the glaze raw materials on phase transformation in leadless iron oxide crystalline glaze. The crystalline phases were investigated by using the DTA, X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The composition of the glaze raw materials compose of nepheline syenite, colemanite, pottery stone, bentonite, ZnO, Li2CO3, SiOSubscript text2 and 10, 15 and 20%(w/w) iron oxide (Fe2O3). The glaze raw materials were ground for homogeneous mixtures by ball milling for 24h. The average particle size of the mixture was 3.86 µm. The glaze bodies were carried to firing at 1,100°C at the heating rate of 2°C/min and soaking for 0.5h. Then, the glaze bodies were cooled at the cooling rate of 1°C/min and maintained at 1,080°C for 3h and then maintained at 980°C for 1h, respectively. From the experiment results, it was found that the crystallization temperatures (Tc) of franklinite (ZnFe2O4) and anorthite (CaAl2Si2O8) depend on the concentration of iron oxide content.

scholarly journals Adsorption of methylene blue from aqueous solutions by pyrolusite ore

2018 ◽  
Vol 18 (44) ◽  
pp. 5-11 ◽  
Author(s):  
Nizamettin Demirkıran ◽  
G D Turhan Özdemir ◽  
M Saraç ◽  
M Dardağan
Keyword(s):  
Methylene Blue ◽  
Particle Size ◽  
Contact Time ◽  
Average Particle Size ◽  
Dye Adsorption ◽  
Blue Dye ◽  
Average Particle ◽  
Order Kinetic ◽  
Adsorbent Dosage ◽  
Initial Ph

In this study, the adsorption of methylene blue dye was examined by using pyrolusite ore as a low-cost alternative adsorbent source. Pyrolusite, which contains mainly MnO2, is a manganese ore. The effects of the initial concentration of dye, contact time, initial pH of solution, adsorbent dosage, stirring speed of solution, and average particle size of adsorbent on the adsorption of methylene blue were studied. It was found that the percentage of the adsorbed dye increased with increasing the amount of pyrolusite. While the initial dye concentration, initial pH, contact time, stirring speed, particle size, and adsorbent dosage were 25 ppm, 6, 90 min, 250 rpm, 63 µm, and 12 g/l, respectively, the efficiency of dye adsorption on pyrolusite ore was 99%. The isotherm and kinetic studies relating to this adsorption process were also made. It was found that the equilibrium data followed the Langmuir isotherm model while the kinetic of process could be described by the pseudo-second order kinetic model.

scholarly journals Methylene Blue Dye Photocatalytic Degradation over Synthesised Fe3O4/AC/TiO2 Nano-Catalyst: Degradation and Reusability Studies

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2360
Author(s):  
Seyedehmaryam Moosavi ◽  
Rita Yi Man Li ◽  
Chin Wei Lai ◽  
Yusliza Yusof ◽  
Sinyee Gan ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Uv Light ◽  
Agricultural Waste ◽  
Average Particle Size ◽  
Blue Dye ◽  
Average Particle ◽  
Step Procedure ◽  
Nano Catalyst ◽  
One Step ◽  
The Stability

In this study, activated carbon (AC) from coconut shell, as a widely available agricultural waste, was synthesised in a simple one-step procedure and used to produce a magnetic Fe3O4/AC/TiO2 nano-catalyst for the degradation of methylene blue (MB) dye under UV light. Scanning electron microscopy revealed that TiO2 nanoparticles, with an average particle size of 45 to 62 nm, covered the surface of the AC porous structure without a reunion of its structure, which according to the TGA results enhanced the stability of the photocatalyst at high temperatures. The photocatalytic activities of synthesised AC, commercial TiO2, Fe3O4/AC, and Fe3O4/AC/TiO2 were compared, with Fe3O4/AC/TiO2 (1:2) exhibiting the highest catalytic activity (98%). Furthermore, evaluation of the recovery and reusability of the photocatalysts after treatment revealed that seven treatment cycles were possible without a significant reduction in the removal efficiency.

scholarly journals Shortleaf Spikesedge-Driven Silver Nanoparticles for The Reduction of Methylene Blue Dye

2021 ◽  
Author(s):  
NORAIN ISA ◽  
Mohamed Syazwan Osman ◽  
Haslinda Abdul Hamid ◽  
Nurdiana Samsulrizal ◽  
Vicinisvarri Inderan ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Silver Nanoparticles ◽  
Reaction Time ◽  
Textile Industry ◽  
Average Particle Size ◽  
Spherical Shape ◽  
Blue Dye ◽  
Average Particle ◽  
Order Kinetic ◽  
Batch Study

Abstract The textile industry is a heavy producer of wastewater, which may result in the discharge of toxic dyes into the environment. Methylene blue (MB) is an example of the most used dye in the textile industry. It is difficult to degrade MB under normal conditions due to its highly stable molecules. Therefore, a catalyst route is desired in MB reduction. The catalyst chosen in this work was silver nanoparticles (AgNPs) synthesised by a biological method utilising shortleaf spikesedge extract (SSE) as a reducing agent. The formations of SSE driven AgNPs were monitored using visual observation (colour), ultraviolet-visible spectroscopy (UV-vis), and transmission electron microscopy (TEM). The different process variables (concentration of AgNO3, concentration of SSE, reaction time, temperature and pH) upon synthesis of SSE driven AgNPs were evaluated based on the absorbance of surface plasmon resonance (SPR) band. The TEM image showed that SSE driven AgNPs are highly dispersed with a quasi-spherical shape and an average particle size of approximately 17.64 nm. For the catalytic study, the reduction of MB was evaluated using two systems. A detailed batch study of the removal efficiency (%RE) and kinetics was done at ambient temperature, various MB initial concentrations, and reaction time. The batch study for System 2 clearly showed that SSE driven AgNPs exhibited 100% reduction of MB at 30–100 mg/L initial concentration (sample coding of MB30, MB50, MB70 and MB100) between 1.5 and 5.0 min reaction time. The kinetic data best fitted a pseudo-first-order kinetic model with the highest reaction rate of 2.5715 min-1. The reduction of MB occurs via the electron relay effect. These findings demonstrate that the SSE driven AgNPs are a promising candidate with potential influence on coloured wastewater.

scholarly journals EFFECT OF OPERATIONAL PARAMETERS ON PHOTOCATALYTIC DEGRADATION OF TOLUIDINE BLUE UTILIZING BiOCl NANOPLATES IN SOLAR LIGHT

2020 ◽  
Vol 4 (12) ◽  
pp. 43-54
Author(s):  
Brijesh Pare ◽  
Vaishali Joshi ◽  
Satish Piplode
Keyword(s):  
Photocatalytic Degradation ◽  
Toluidine Blue ◽  
Average Particle Size ◽  
Solar Light ◽  
Catalyst Loading ◽  
Blue Dye ◽  
Average Particle ◽  
Operational Parameters ◽  
X Ray Diffraction ◽  
Sem Images

This work is devoted to the study of the effects of various operational parameters such asH2O2, K2S2O8, NaCl, Na2CO3, FeCl3, Fenton’s reagent, O2, N2 purging, effect of otherphotocatalysts on the photocatalytic degradation of toluidine blue dye by as synthesized nanoBiOCl under solar light in following conditions pH= 11, catalyst loading= 30 mg/100ml andinitial dye concentration= 4 × 10-5 mol L-1. Nano BiOCl was prepared by a simple hydrolysismethod at room temperature and characterized by X-ray diffraction (XRD) and HighResolution Field Emission Scanning Microscope (HR FESEM). XRD pattern suggested thatthe synthesized nano BiOCl was highly pure and crystalline, SEM images depicted theplatelike morphology of nano BiOCl. The average particle size of nano BiOCl was obtained as45 nm. It was observed that these operational parameters greatly influenced the rate ofphotocatalytic degradation. The optimum concentrations of oxidants, salts, FeCl3 andFenton’s reagent for photocatalysis of toluidine blue have also been obtained.

scholarly journals USE OF NANOSIZED CHROMIUM DOPED TiO2 SUPPORTED ON ZEOLITE FOR METHYLENE BLUE DEGRADATION

2010 ◽  
Vol 10 (1) ◽  
pp. 20-25 ◽  
Author(s):  
Aarti Ameta ◽  
Indu Bhati ◽  
Rakshit Ameta ◽  
Suresh C. Ameta
Keyword(s):  
Methylene Blue ◽  
Titanium Dioxide ◽  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Blue Dye ◽  
Photocatalytic Reaction ◽  
Methylene Blue Dye ◽  
X Ray Diffraction ◽  
Methylene Blue Degradation ◽  
X Ray

The photocatalytic degradation of methylene blue dye under visible light has been investigated using chromium modified titanium dioxide supported on zeolite (Cr-TiO2/zeolite). The photocatalyst was prepared by sol-gel method and characterized by X-ray diffraction and SEM. The rate of photodegradation of dye was monitored spectrophotometrically. The effect of pH, dye concentration, amount of photocatalyst and intensity of light on the rate of photocatalytic reaction was observed. The results showed that the use of Cr-doped TiO2 increased the rate of photocatalytic degradation of methylene blue as compared to untreated TiO2. The photocatalytic mechanism of Cr-TiO2 catalyst has been tentatively discussed.   Keywords: Methylene blue, zeolite, chromium, photocatalytic degradation

scholarly journals Effect of preparation method in the properties of iron oxide catalysts for fenton reaction

2020 ◽  
Vol 6 (5) ◽  
pp. 0607-0616
Author(s):  
Fabiana Maria Barbosa ◽  
Andre Rosa Martins
Keyword(s):  
Methylene Blue ◽  
Iron Oxide ◽  
Fenton Reaction ◽  
Combustion Method ◽  
Catalytic Performance ◽  
Area Measurement ◽  
Blue Dye ◽  
X Ray Diffraction ◽  
X Ray ◽  
Model Molecule

This work discusses methods of preparing iron oxide for the Fenton reaction, using methylene blue as a model molecule. The solids were prepared by precipitation, complexation, combustion, and decomposition and characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electronic microscopy, energy dispersive X-ray spectroscopy, specific surface area measurement and were evaluated for methylene blue removal. The method influenced the structural and surface properties of the solids, and consequently the catalytic performance of the solids. The solid prepared by precipitation showed the highest area, amorphous phase, and the best performance in the adsorption test. On the other hand, the combustion method favored the formation of hematite and traces of magnetite.  The solid prepared by this method showed higher values of the methylene blue dye oxidation./Este trabalho discute métodos de preparação de óxido de ferro para a reação de Fenton, utilizando o azul de metileno como molécula modelo. Os sólidos foram preparados por precipitação, complexação, combustão e decomposição e caracterizados por espectroscopia de infravermelho por transformada de Fourier, difração de raios-X, microscopia eletrônica de varredura, espectroscopia de energia dispersiva de raios-X, medição de área superficial específica e foram avaliados para remoção de azul de metileno. O método influenciou as propriedades estruturais e superficiais dos sólidos e, consequentemente, o desempenho catalítico dos sólidos. O sólido preparado por precipitação apresentou a maior área, fase amorfa e melhor desempenho no teste de adsorção. Por outro lado, o método de combustão favoreceu a formação de hematita e vestígios de magnetita.  O sólido preparado por este método apresentou valores mais altos de oxidação do azul de metileno.

Green Synthesis of NiO Nanoparticle Using Ziziphus Spina-Christi Leaves Extract for Photocatalytic Methylene Blue Dye Degradation

2021 ◽  
Vol 13 (9) ◽  
pp. 1756-1763
Author(s):  
Hamdah S. Alanazi ◽  
Hanan Alotaibi ◽  
Hamza S. Al-Shehri ◽  
Fahad A. Alharthi
Keyword(s):  
Methylene Blue ◽  
Environmental Remediation ◽  
Dye Degradation ◽  
Uv Light ◽  
Average Particle Size ◽  
Active Species ◽  
Wide Bandgap ◽  
Blue Dye ◽  
Average Particle ◽  
Factors Affecting

In this presented work, ziziphus spina-christi leaves extract assisted green synthesise approach was used to prepare the NiO nanoparticle for UV light driven photocatalytic methylene blue (MB) dye degradation. Various analytical characterizations were used to understand the crystalline, structural, optical and morphological nature of the prepared nanoparticle. The prepared NiO nanoparticle have wide bandgap of 3.35 eV with average particle size of around 10–15 nm in range. Various environmental conditions and elemental trapping experiments were conducted to understand the factors affecting the MB degradation and main active species for the redox reaction. Hence, we hope that this green synthesise NiO would pave a new way for photocatalytic preparation and their environmental remediation application.

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