Photocatalytic Degradation of Methylene Blue and Methyl Orange over TiO2 Powder Synthesized via the Solvothermal Method

2015 ◽  
Vol 749 ◽  
pp. 51-55
Author(s):  
Pongthep Jansanthea ◽  
Natkritta Boonprakob ◽  
Jaruwan Treenattip ◽  
Pusit Pookmanee ◽  
Sukon Phanichphant
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Solvothermal Method ◽  
Ammonium Hydroxide ◽  
Titanium Isopropoxide ◽  
Mixed Solution ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray

Titanium dioxide (TiO2) powder was synthesized via the solvothermal method. Titanium isopropoxide (C12H28O4Ti), ammonium hydroxide (NH4OH) and nitric acid (HNO3) were used as the starting materials. The mixed solution was diluted with ethanol (C2H5OH) and heated at 100°C for 5h in a Teflon–lined stainless steel autoclave vessel. The phase transition of TiO2 powder was studied by X–ray diffraction (XRD). The morphology and chemical composition of TiO2 powder were investigated by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The photocatalytic degradation of methylene blue and methyl orange over TiO2 powder were determined using Ultraviolet–visible spectroscopy (UV–Vis).

Methylene Blue Degradation over Photocatalyst Bismuth Vanadate Powder Synthesized by the Hydrothermal Method

2010 ◽  
Vol 93-94 ◽  
pp. 177-180 ◽  
Author(s):  
Pusit Pookmanee ◽  
Kanlaya Pingmuang ◽  
Wiyong Kangwansupamonkon ◽  
Sukon Phanichphant
Keyword(s):  
Methylene Blue ◽  
Hydrothermal Method ◽  
Ammonium Hydroxide ◽  
Bismuth Vanadate ◽  
Mixed Solution ◽  
X Ray Diffraction ◽  
Methylene Blue Degradation ◽  
X Ray ◽  
Ammonium Vanadate ◽  
Calcination Step

Bismuth vanadate powder was synthesized by the hydrothermal method with bismuth nitrate and ammonium vanadate as the starting precursors with the mole ratio of bismuth and vanadium of 1:1. The mixed solution was adjusted with ammonium hydroxide until the pH of final solution was 7 and hydrothermally treated at 100 °C for 2-6h. The phase was studied by X-ray diffraction (XRD). Monoclinic structure was obtained after hydrothermal treated at 100 °C for 6h without calcination step. The morphology was investigated by scanning electron microscopy (SEM). The particle was needle-like in shape and highly agglomerate. The degradation of methylene blue over photocatalyst bismuth vanadate powder was examined by ultraviolet spectroscopy (UV). Bismuth vanadate powder synthesized by the hydrothermal method at 100 °C for 6h showed the highest photocatalytic activity.

Photocatalytic Degradation of Geosmin by Titanium Dioxide Powder Synthesized by the Hydrothermal Route

2010 ◽  
Vol 93-94 ◽  
pp. 161-164 ◽  
Author(s):  
Pusit Pookmanee ◽  
Hathaithip Ninsonti ◽  
Supaporn Sangsrichan ◽  
Wiyong Kangwansupamonkon ◽  
Sukon Phanichphant
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Degradation ◽  
Ph Value ◽  
Ammonium Hydroxide ◽  
Titanium Isopropoxide ◽  
Mixed Solution ◽  
Hydrothermal Route ◽  
X Ray ◽  
Titanium Dioxide Powder ◽  
Dioxide Powder

Titanium dioxide powder was synthesized by the hydrothermal route with the starting precursors as titanium isopropoxide, ammonium hydroxide and nitric acid. The final of pH value of mixed solution was 1 and treated in the hydrothermal PTFE vessel at 80-100 °C for 3h. The phase of titanium dioxide was characterized by X-ray diffractometer (XRD). The morphology of titanium dioxide was investigated by scanning electron microscope (SEM). The chemical composition of titanium dioxide was examined by energy dispersive X-ray spectrophotometer (EDXS). The photocatalytic degradation of geosmin by titanium dioxide was determined by gas chromatograph coupled with flame ionization detector (GC-FID).

Photocatalytic Degradation of 2-chlorophenol over TiO2 Powder

2014 ◽  
Vol 931-932 ◽  
pp. 291-295
Author(s):  
Pusit Pookmanee ◽  
Songpon Ngamta ◽  
Wiyong Kangwansupamonkon ◽  
Ratchadaporn Puntharod ◽  
Supaporn Sangsrichan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Phase Transition ◽  
Photocatalytic Degradation ◽  
Ph Value ◽  
Ammonium Hydroxide ◽  
Titanium Isopropoxide ◽  
Chemical Compositions ◽  
Mixed Solution ◽  
Hydrothermal Route ◽  
Scanning Electron

Titanium dioxide (TiO2) powder was prepared by hydrothermal route. Titanium isopropoxide, ammonium hydroxide and nitric acid were used as the starting materials. The final pH value of mixed solution was 1 and treated at 80 and 100 °C for 26h. The phase transition of TiO2powder was studied by Xray diffraction (XRD). Multiphase of anatase and rutile of TiO2powder were obtained at 80 and 100 °C for 26h without calcination steps. The morphology of TiO2powder was investigated by scanning electron microscopy (SEM). The particle was highly agglomerated and irregular in shape with the range of particle size of 0.10.3 μm. The chemical composition of TiO2powder was examined by energy dispersive spectroscopy (EDS). The element chemical compositions show the characteristic Xray energy level as follows: titanium Kα= 4.51 keV and Kβ= 4.93 keV and oxygen Kα= 0.52 keV, respectively. The photocatalytic degradation efficiency of 2chlorophenol (2CP) over TiO2powder was determined by gas chromatography (GC). It was found that TiO2powder prepared by hydrothermal route at 80 °C for 2h was the best efficiency for photocatalytic degradation of 2CP.

scholarly journals The Improved Photocatalytic Properties of Methylene Blue for V2O3/CNT/TiO2Composite under Visible Light

2010 ◽  
Vol 2010 ◽  
pp. 1-5 ◽  
Author(s):  
Ming-Liang Chen ◽  
Won-Chun Oh
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Area Measurement ◽  
Bet Surface Area ◽  
Multiwall Carbon Nanotube ◽  
X Ray Diffraction ◽  
Vanadyl Acetylacetonate ◽  
X Ray ◽  
Transmission Electron

Multiwall carbon nanotube (MWCNT), vanadyl acetylacetonate (V(acac)3), and titaniumn-butoxide (TNB) were used as carbon, vanadium oxide, and titanium oxide precursor to prepare V2O3/CNT/TiO2composite. The obtained composite was characterized by BET surface area measurement, X-ray diffraction, transmission electron microscopy, and energy dispersive X-ray analysis. In addition, we used methylene blue (MB) solution under condition of visible light irradiation to determine their photocatalytic degradation efficiency. In conclusion, the V2O3/CNT/TiO2composite had excellent photocatalytic degradation for MB solution under visible light.

scholarly journals Photocatalyst Ag@N/TiO2 Nanoparticles: Fabrication, Characterization, and Investigation of the Effect of Coating on Methyl Orange Dye Degradation

2017 ◽  
Vol 7 (3) ◽  
Author(s):  
Pourya Mehdizadeh
Keyword(s):  
Methyl Orange ◽  
Tio2 Nanoparticles ◽  
Diffuse Reflectance ◽  
Dye Degradation ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Photochemical Method ◽  
Medium Activity

In this research, N-doped TiO2 (N/TiO2) nanoparticles have been synthesized by a sol-gel method. N/TiO2 nanoparticle has been coated with Ag metal by photochemical method. Triethylamine, N(CH3CH2)3, have been used as precursors of Nitrogen, titanium tetraiso-propoxide (TTIP), Ti[OCH(CH3)2]4, used as precursors of titanium and Ag(NO3)2 used as precursors of Silver in synthesis of these nanoparticles. The photocatalytic activity has been perused for degradation of Methyl Orange (MO) as model of natural pollutants. Synthesized nanoparticles were analyzed by X-ray diffraction spectroscopy, Fourier transform spectroscopy, scanning electron microscopy, and energy dispersive of X-ray spectroscopy and diffuse-reflectance of Ultraviolet-visible spectroscopy. Results illustrated that under both visible and ultraviolet light, N/TiO2 nanoparticles had medium activity but with coating, the activity in each area efficiently improved. The presence of 1.5% Ag coated on N/TiO2 (with 2:1 mole ratio) resulted to the highest activity under visible and Ultraviolet irradiation in the catalyst.

scholarly journals Sunlight Assisted Degradation of Methylene Blue as a Model Dye using Bismuth Oxychloride Nanoparticles: Ecofriendly and Industry Efficient Photocatalysis for Waste Chemical Treatment

2019 ◽  
Vol 32 (1) ◽  
pp. 115-121
Author(s):  
Chandan Adhikari ◽  
Mandeep Kaur ◽  
Ravichandran
Keyword(s):  
Methylene Blue ◽  
Dye Degradation ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Bismuth Oxychloride ◽  
Fourier Transformed Infrared Spectroscopy ◽  
Different Types ◽  
Photocatalytic Dye Degradation ◽  
Uv Visible

In this study, an efficient sunlight triggered dye degradation was demonstrated using methylene blue as a model dye and bismuth oxychloride nanoparticles were used as photocatalyst. Two different types of nanoparticles, nanoflower and nanodisk, were prepared to understand the effect of morphology on the photocatalysis. Both the particles were prepared following a straightforward and easy methodology from readily available chemicals. The particles were characterized using scanning electron microscope, Fourier transformed infrared spectroscopy, powder X-ray diffraction. UV-visible spectroscopy and colorimeter were used to evaluate the photocatalytic activity of the catalyst. Both the nanoparticles were able to degrade the dye completely within 3-4 h under visible light. The photocatalytic rate constant analysis demonstrates that out of two morphology, nanoflower is found to be more effective than nanodisk towards dye degradation. The sunlight was also used to understand whether the photocatalyst can degrade the dye or not in presence of sunlight only. Both nanoparticles were able to degrade the dye 100 % in presence of sunlight within maximum 4 h. The photocatalytic dye degradation in presence of sunlight was conducted in between 10 a.m. to 4 p.m. when the maximum amount of sunlight is available with high intensity and energy. The catalysts were 100 % active after the first cycle and upto four cycles the dye degradation efficiency remain around 60-80%. The study demonstrates that sunlight can degrade the dye in presence of these photocatalyst which clearly indicates its energy saving approach thus making it more economic and green methodology for the industries.

Molecular orientation of methylene blue intercalated in layer-charge-controlled montmorillonites

2003 ◽  
Vol 18 (11) ◽  
pp. 2639-2643 ◽  
Author(s):  
Yoshiro Kaneko ◽  
Nobuo Iyi ◽  
Juraj Bujdák ◽  
Ryo Sasai ◽  
Takektoshi Fujita
Keyword(s):  
Methylene Blue ◽  
Molecular Orientation ◽  
Layer Charge ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Charge Densities ◽  
Clay Surface ◽  
Host Materials

The effect of the layer-charge density of clay on the orientation and aggregation of a cationic dye, methylene blue (MB), in MB/clay films was investigated using a series of layer-charge-controlled montmorillonites as host materials. Polarized ultraviolet-visible spectroscopy and x-ray diffraction were used for the characterization of the arrangement and orientation of dye cations in host interlayer spaces. It was revealed that high charge densities of layers induced the formation of relatively ordered and homogeneous phases with dye dimers. The reduction of the charge led to the formation of disordered, mixed phases with large amounts of monomers (isolated dye cations). Dimers and monomers were slightly tilted against the plane of the clay surface, and their angles were not affected by the layer charge.

Relationship between Planes of Cu2O Microcrystal and Photo-Catalytic Degradation of Methylene Blue

2013 ◽  
Vol 807-809 ◽  
pp. 562-566
Author(s):  
Wei Dong Shi ◽  
Dan Yan ◽  
Wei Qiang Fan
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Diffuse Reflectance ◽  
Photocatalytic Performance ◽  
Xenon Lamp ◽  
X Ray Diffraction ◽  
Co Catalyst ◽  
X Ray ◽  
Main Influence ◽  
Better Than

Four kinds of Cu2O microcrystals with different morphologies are synthesized via low temperature hydrothermal synthetic method. The photocatalytic degradation of methylene blue (MB) of the above different Cu2O is preliminary explored based on this observation. 6-facet, 8-facet, 14-facet are prepared by PVP system and 26-facet is prepared by NaOH system. They are characterized by means of Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and Diffuse Reflectance Spectra (DRS). Under 150 W xenon lamp irradiation, 0.5 gL1 catalyst and 0.1% (v/v) 30% H2O2 as co-catalyst are used to degrade 5% 100 mL MB solution. The reaction time is 80 min. 26-facet Cu2O polyhedral discolor about 89.48% of MB while 6-facet Cu2O microcrystal about discolor about 20.18% which is the lowest decolourization rate among all the samples. The photocatalytic performance of 8-facet Cu2O microcrystal is slight better than that of 14-facet. The decolourization rate of 8-facet and 14-facet are 56.00% and 41.08%, respectively. The main reason is that the planes of Cu2O microcrystal have a main influence on photocatalytic degradation of MB.

Synthesis and Cathodoluminescence of CdS Nanowires

2011 ◽  
Vol 688 ◽  
pp. 301-306 ◽  
Author(s):  
Xiao Dan Hu ◽  
Hai Qian Zhang
Keyword(s):  
Solvothermal Method ◽  
Visible Region ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Cds Nanocrystals ◽  
Cds Nanowire ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Cds Nanowires

CdS nanowires were synthesized with tetramethyl thiuram disulfide (TMTD) as a new sulphur source by a solvothermal method in ethylenediamine at 180°C for 24 h. The crystallinity, morphology and probable formation mechanism of CdS nanocrystals were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM) and selected area electron diffraction (SAED). The optical properties were investigated by ultraviolet-visible spectroscopy (UV-vis) and cathodoluminescence (CL). The results indicated that CdS nanocrystals were hexagonal and had a wire-like morphology with a diameter of 20 to 50 nm. There were blue shifts at the onset of absorption of the CdS nanowire, compared with the absorption of the bulk CdS. The cathodoluminescence (CL) implied that CdS nanowires possessed potential optical property in the visible region.

Visible-Light Driven Effective Photocatalytic Degradation of Methylene Blue Dye Using Perforated Curly Zn0.1Ni0.9O Nanosheets

2020 ◽  
Vol 20 (9) ◽  
pp. 5759-5764
Author(s):  
V. Karthikeyan ◽  
G. Gnanamoorthy ◽  
P. Varun Prasath ◽  
V. Narayanan ◽  
Suresh Sagadevan ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Organic Waste ◽  
Hydrothermal Process ◽  
Blue Dye ◽  
Cubic Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Visible Light Driven

Herein, we report the facile synthesis, characterization and visible-light-driven photocatalytic degradation of perforated curly Zn0.1Ni0.9O nanosheets synthesized by hydrothermal process. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) studies confirmed the cubic phase crystalline structure and growth of high density perforated curly Zn0.1Ni0.9O nanosheets, respectively. As a photocatalyst, using methylene blue (MB) as model pollutant, the synthesized nanosheets demonstrated a high degradation efficiency of ~76% in 60 min under visible light irradiation. The observed results suggest that the synthesized Zn0.1Ni0.9O nanosheets are attractive photocatalysts for the degradation of toxic organic waste in the water under visible light.

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