scholarly journals Hydrothermal Sol-gel TiO2 Nanoparticles fixed to Clay and its Photocatalytic Application for the Degradation of Methyl Orange

2019 ◽  
Vol 9 (2) ◽  
pp. 125-132
Author(s):  
Aliou Pohan ◽  
Hervé Goure-Doubi ◽  
Amadou Kouyate ◽  
Muhammad Nasir ◽  
Maria Visa ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Sol Gel ◽  
Polluted Water ◽  
Photocatalytic Application ◽  
Titanium Tetra Isopropoxide ◽  
Tio2 Nanomaterials ◽  
Surface Measurements ◽  
Simulated Solar Radiation ◽  
Bet Surface Measurements ◽  
Degradation Of Methyl Orange

In this paper, Clay-TiO2 nanomaterials were synthesized via hydrothermal sol-gel method using Ivorian clays and titanium tetra-isopropoxide as precursors. The synthesized composite was characterized through XRD, SEM/EDX, FTIR and BET surface measurements. The photocatalytic activity of composite towards the degradation of methyl orange (MO), a model pollutant, has been investigated under UV and simulated solar radiation. Comparative experiments done in a solution with and without H2O2 indicate an increase in efficiency for methyl orange removal from the polluted water in the presence of H2O2. The optimized parameters (contact time, amount of nanocomposite and amount of Fe2+/H2O2) allowed to reach removal efficiency up to 60 % of MO. Immobilization of TiO2 on clay facilitate repeated using of nanomaterials, two time.

scholarly journals Preparation of TiO2 nanorods by Sol–Gel template method and measured its photo- catalytic activity for degradation of methyl orange

2019 ◽  
Vol 13 (26) ◽  
pp. 171-177
Author(s):  
Ban M. Al-Shabander
Keyword(s):  
Methyl Orange ◽  
Sol Gel ◽  
Tio2 Nanorods ◽  
X Ray Diffraction ◽  
X Ray ◽  
Force Microscopy ◽  
Photo Catalytic Activity ◽  
Atomic Force ◽  
Degradation Of Methyl Orange ◽  
Titanium Dioxide Nanorods

Titanium dioxide nanorods have been prepared by sol-gel templatemethod. The structural and surface morphology of the TiO2 nanorods wasinvestigated by X-ray diffraction (XRD) and atomic force microscopy(AFM), it was found that the nanorods produced were anatase TiO2 phase.The photocatalytic activity of the TiO2 nanorods was evaluated by thephoto degradation of methyl orange (MO). The relatively higherdegradation efficiency for MO (D%=78.2) was obtained after 6h of exposedto UV irradiation.

Substituted Co–Cu–Zn nanoferrites: synthesis, fundamental and redox catalytic properties for the degradation of methyl orange

RSC Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 1360-1375 ◽  
Author(s):  
Santosh Bhukal ◽  
Manisha Dhiman ◽  
S. Bansal ◽  
Mukesh K. Tripathi ◽  
Sonal Singhal
Keyword(s):  
Methyl Orange ◽  
Catalytic Properties ◽  
Sol Gel ◽  
Combustion Method ◽  
Auto Combustion ◽  
Recyclable Catalysts ◽  
Degradation Of Methyl Orange

Co0.6Zn0.4Cu0.2MxFe1.8−xO4 (M = Zn2+, Co2+, Ni2+ and Mn3+. x = 0.2, 0.4, 0.6 and 0.8) magnetically recyclable catalysts have been synthesized via a sol–gel auto combustion method.

Preparation of Zno-Cr2O3 Composites by a Sol-Gel Method and their Photocatalytic Activities

2012 ◽  
Vol 151 ◽  
pp. 365-367 ◽  
Author(s):  
Kai Yuan Gu ◽  
Zhan En Peng ◽  
Jin Hua Feng ◽  
Feng Qiang Sun
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Sol Gel ◽  
Mercury Lamp ◽  
Gel Method ◽  
Sol Gel Method ◽  
Photocatalytic Activities ◽  
Degradation Of Methyl Orange

The ZnO-Cr2O3 composites with different complex proportion were prepared by a sol-gel method. The mol ratio of Zn and Cr element could be tuned by controlling the concentration of the precursors. These composites showed photocatalytic activities in degradation of methyl orange under the irradiation of 300W mercury lamp. And the activities regularly varied with the mol ratio of Zn and Cr. When n（Zn）:n（Cr）=10:1, a composite with best photocatalytic activity could be obtained.

N-Loaded TiO2 for Photocatalytic Degradation of Methyl Orange under Visible Light Irradiation

2012 ◽  
Vol 622-623 ◽  
pp. 883-888
Author(s):  
Natkritta Boonprakob ◽  
Natda Wetchakun ◽  
Sukon Phanichphant ◽  
Jun Chen ◽  
Burapat Inceesungvorn
Keyword(s):  
Methyl Orange ◽  
Visible Light ◽  
Band Gap ◽  
Visible Light Irradiation ◽  
Sol Gel ◽  
Band Gap Energy ◽  
Light Irradiation ◽  
Gap Energy ◽  
Visible Light Driven ◽  
Degradation Of Methyl Orange

Nitrogen-loaded TiO2(N-loaded TiO2), a visible-light driven catalyst, was successfully synthesized by the modified sol-gel method. Physical characterizations of the as-prepared catalysts have been performed by using X-ray diffraction (XRD), Diffuse reflectance UVvisspectroscopy(DRUVvis), Raman spectroscopyand BETspecific surface areain order to obtain structure-activity relationship. Results from Raman spectroscopy clearly suggested that N atoms were incorporated into the TiO2crystal lattice as evidenced by the vibrational peak of TiN in TiO2-xNx.DR UVvis results also suggested that the nitrogen dopant might be responsible for narrowing the TiO2band gap energy, thus resulting in a shift towards the visiblelight region. Photocatalytic activity of N-loaded TiO2evaluated through the degradation of methyl orange (MO)under visible light irradiation (l> 400 nm) indicated that all N-loaded photocatalysts exhibited significantly higher activities than the unloaded TiO2and Degussa P25 TiO2. According to the results from DR UV-vis, XRD and BET studies, the enhanced photoactivity observed from N-loaded samples might be due to a decrease in TiO2band gap energy and/or changes in chemical and physical properties of the materials upon loading with nitrogen.

Preparation and Photocatalytic Property of Lanthanum-Doped TiO2 Nanoparticles

2012 ◽  
Vol 549 ◽  
pp. 584-588
Author(s):  
Qing Li ◽  
Rui Zhi Wen
Keyword(s):  
Particle Size ◽  
Catalytic Activity ◽  
Methyl Orange ◽  
Particle Size Distribution ◽  
Sol Gel ◽  
Photocatalytic Property ◽  
Photocatalytic Efficiency ◽  
Mass Percentage ◽  
Supercritical Fluid Drying ◽  
Degradation Of Methyl Orange

Nano-TiO2 photocatalyst powders were prepared through the sol-gel method and supercritical fluid drying(SCFD). The TG-DTA、XRD、particle size distribution technique、SEM were used to characterize the hyperfine TiO2 particles.The lanthanum-doped TiO2 with different mass percentage of La3+ were compared with pure TiO2 when used as photocatalyst in degradation of methyl orange. The best catalytic activity was observed with 0.02(mol)%La-TiO2. Photocatalytic efficiency of the 0.02(mol)%La- TiO2 is improved by 30.79% comparing to pure TiO2.

Influence of Stabilizer on the Microstructures and Photocatalytic Performance of ZnO Nanopowder Synthesized by Sol-Gel Method

2017 ◽  
Vol 50 ◽  
pp. 57-71 ◽  
Author(s):  
Xiao Nan Xu ◽  
Qiu Ping Zhang ◽  
Brain T.M. Ong ◽  
Huan Yuan ◽  
Yu Chen ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Surface Defects ◽  
Sintering Temperature ◽  
Sol Gel ◽  
Microstructural Analysis ◽  
Volume Ratio ◽  
Gel Method ◽  
Sol Gel Method ◽  
Photocatalytic Effect ◽  
Degradation Of Methyl Orange

Utilizing zinc acetate as precursor, and monoethanolamine (MEA), diethanolamine (DEA) and triethanolamine (TEA) as stabilizers, respectively, ZnO nanoparticles with uniformly distributed grains were synthesized by sol-gel method at different sintering temperatures. Analysis of the degradation of methyl orange by photocatalysis shows that utilizing MEA as the stabilizer and 550°C as the sintering temperature results in smaller grain size, greater surface-to-volume ratio, and a density of surface defects suitable for a photocatalyst. The greatest photocatalytic degradation of methyl orange was achieved under UV irradiation. Based on our microstructural analysis and photocatalysis, the microstructure of ZnO particles and, in turn, their photocatalytic effect are affected significantly by the stabilizer type and the sintering temperature.

The Application of Modified Nanometer Titanium Dioxide in Degradation of Methyl Orange Solution

2013 ◽  
Vol 750-752 ◽  
pp. 1401-1404
Author(s):  
Xin Qian Shu ◽  
Zhi Qiang Shan
Keyword(s):  
Methyl Orange ◽  
Doping Concentration ◽  
Sol Gel ◽  
Methyl Orange Solution ◽  
Optimum Concentration ◽  
Thin Membrane ◽  
Glazed Ceramic ◽  
Gel Processing ◽  
Orange Solution ◽  
Degradation Of Methyl Orange

The nanometer TiO2 thin membrane on different substrates doped with La3+ was prepared from Ti (OC4H9)4 and La (NO3)3 by Sol-Gel processing using dipping technique. The photocatalytic activity of membrane at different doping concentration in photocatalytic methyl orange was studied. The result showed that both the degraded rate and the optimum concentration depended on the change of doping concentration and substrates. When TiO2 thin membrane was doped with 0.5 La3+ on the substrates of glazed ceramic, aluminum and stainless steel, TiO2 membrane has the maximum degradation rate.

Synthesis and Characterization of Ag-Decorated TiO2 Nanoparticles for Photocatalytic Application

2021 ◽  
Vol 10 (4) ◽  
pp. 13-18
Author(s):  
K. Balachandran ◽  
G. Vijayakumar ◽  
S. Mageswari ◽  
A. Preethi ◽  
M.S. Viswak Senan
Keyword(s):  
Grain Size ◽  
Tio2 Nanoparticles ◽  
Sol Gel ◽  
Tem Analysis ◽  
Photocatalytic Application ◽  
Visible Spectra ◽  
Sol Gel Process ◽  
Titanium Tetra Isopropoxide ◽  
Ft Ir

TiO2 nanoparticles (TiO2) and Ag-doped TiO2 nanocomposites (Ag-TiO2) were synthesized by the Sol-Gel process using titanium tetra isopropoxide as TiO2 and AgNO3 as Ag precursors, respectively. The synthesized nanocomposites were characterized by XRD, SEM, TEM, FT-IR, and UV­-Visible analysis. The XRD results show that Ag doping increases the grain size from 22 nm to 36 nm. From the UV-Visible spectra, the redshift in absorbance was observed, which indicates the increase in grain size and it reduces the bandgap. The TEM analysis shows that all the particles are exhibited in the nanometer range. The synthesized nanoparticles show good photocatalytic activity, and they decompose the methyl orange dye within 5 hours.

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