Photocatalytic Decolourization and Degradation of C. I. Basic Blue 41 Using TiO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; Nanoparticles

Giwa, Abdulraheem; Nkeonye, P. O.; Bello, K. A.; Kolawole, Kasali Ademola

doi:10.4236/jep.2012.39124

Cited by 46 publications

(15 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Giwa et al found apparent rate constant for 100 ppm of BB 41 as 0.005 l/mol min using only TiO 2 Degussa P-25 as a photocatalyst after 60 min of irradiation [11]. Our results are in a good agreement with the literature result.…”

Section: Photocatalytic Degradation Experimentssupporting

confidence: 83%

Effect of Dye Type on Montmorillonite-Supported Pr-Doped TiO₂Composite Photocatalsyt

Otsukarci

Kalpaklı

2016

Acta Phys. Pol. A

View full text Add to dashboard Cite

Scarcity of water in today's world has led to scientific researches for finding smarter ways of discharging and re-using water located in the seas and lakes. That is how advanced oxidation technologies have emerged as one of the new discharging techniques to keep water sources clean. In our method we have synthesized praseodymium (Pr) doped TiO2-Montmorillonite composite photocatalyst by using acid sol-gel method. Pr, in the group of rare earth metals, is known for its ability to form Lewis bases in order to break down aldehydes, amines, etc., by decreasing the crystal size and consequently increasing the surface area. We have used the mineral form of the bentonite clay (montmorillonite) to increase the surface area of our composite photocatalyst. Two types of azo dyes which are commercially known as Basic Yellow 28 (BY 28) and Basic Blue 41 (BB 41) were used in experimants. These dyes are composed of different chemical structures: BY 28 is known as azomethine dye (-CH=N-), whereas BB 41 has one azo bond (-N=N-). The initial model dye concentrations were 100 ppm. Amount of 1.0 g/l of photocatalyst was used throughout the experiments. In order to evaluate degradation efficiency results, the dissolved organic carbon analyzer was used. We have found the optimum dark adsorption time to be under 15 minutes. By stirring under 15 minutes in the dark we have achieved efficiency of 52.50% for BY 28 and 66.74% for BB 41. On the other hand, by stirring under UV-A light irradiation for two hours we have achieved the overall degradation efficiency of 86.30% for BY 28 and 92.39% for BB 41. Our results show that higher adsorption and overall efficiencies were observed in BB 41 than in BY 28. Moreover, according to Water Pollution Control Regulations, the chemical oxygen demand limitations for textile industry are between 200-400 mg/l. To evaluate the degradation characteristics of Pr-doped TiO2-Montmorillonite composite, the change of chemical oxygen demand values with time for 100 mg/l of BY 28 and BB 41 were investigated. The obtained chemical oxygen demand values were 60.5 and 34.8 mg O2/l after 2 hours of oxidation processes for BY 28 and BB 41. As it can be seen from the results, obtained values are below the limitations.

show abstract

Section: Photocatalytic Degradation Experimentssupporting

confidence: 83%

Effect of Dye Type on Montmorillonite-Supported Pr-Doped TiO₂Composite Photocatalsyt

Otsukarci

Kalpaklı

2016

Acta Phys. Pol. A

View full text Add to dashboard Cite

show abstract

“…The pH not only plays a main role during the hydroxyl radicals generation and textile wastes degradation but it also affects the charge on the catalyst particles, and the positions of conductance and valence bands [17,18]. Therefore the role of pH on the degradation was studied at different pH conditions like 2, 4, 7 and 9 at time duration of 1 h. The requried pH of the solution was maintained by adding HNO 3 and NaOH solution.…”

Section: Photodegradation Of Methyl Orangementioning

confidence: 99%

Synthesis, characterization and photocatalytic activity of silver nanoparticles/amidoxime-modified polyacrylonitrile nanofibers

et al. 2015

View full text Add to dashboard Cite

Polyacrylonitrile (PAN) nanofibers were prepared by an electrospinning technique, which were chemically modified with amidoxime groups. The silver nanoparticles were then synthesized on amidoxime modified PAN (OM-PAN), which was used for the photodegradation of methyl orange in aqueous solution. The SEM images showed that the average diameter of PAN nanofibers was below 200 nm. The SEM micrograph also showed that the silver nanoparticles were well dispersed on the surface of OM-PAN nanofiber mat. The micrograph also presented that the average size of silver nanoparticles was below 100 nm. The photodegradation study showed that the degradation of methyl orange in aqueous medium was increased as increased the irradaition time. The results illustrated that silver nanoparticles (Ag)/OM-PAN nanofiber mat degraded about 80 % of methyl orange within 6 h. The degradation efficiency was found to be pH dependent and maximum degradation was found at lower pH (about 90 % of dye is degraded at pH 2). The Ag/OM-PAN nanofiber dosage presented that the degradation of dye was increased as increased the catalyst dosage.

show abstract

“…3,4 Certain characteristics of dyes such as toxicity, resistance to degradation and photodegradation rates are believed to be dependent on the chemical structure of each dye. 4,5 For example, Giwa et al, 6 investigated the photodegradation of Reactive Yellow 81 and Reactive Violet 1 in aqueous solution with TiO 2 -P25 (Degussa) and observed that structural variation between the dyes molecules may have influenced their degradation rates. With regards to aromatic compounds, the number, position and the electronic nature of the substituents determine the efficiency of the photocatalytic degradation process.…”

Section: Introductionmentioning

confidence: 99%

Comparative photocatalytic degradation of monoazo and diazo dyes under simulated visible light using Fe3+/C/S doped-TiO2 nanoparticles

Anku

Oppong²,

Shukla³

et al. 2016

ACSi

View full text Add to dashboard Cite

This research work delved into the photocatalytic degradation of monoazo dye (methyl orange) and diazo dye (congo red) in aqueous solution using Fe 3+ /C/S-doped TiO 2 nanocomposites. The nanocomposites were synthesised through sol-gel method and characterized using XRD, FTIR, SEM, TEM, EDX, BET and UV-Vis. Photocatalytic degradation of the dyes was monitored under simulated visible light using pristine TiO 2 , C/S/doped-TiO 2 and Fe 3+ /C/S doped-TiO 2 with varying concentrations of Fe 3+ . The influence of catalyst doping, solution pH, and light intensity were also examined. Doping TiO 2 with Fe 3+ /C/S caused reduction in its band gap value with the resultant improvement in its visible light activity. The photocatalytic efficiency of the catalysts is given as follows: TiO 2 < C/S/TiO 2 < Fe 3+ /C/S-TiO 2 with Fe 3+ /C/S-TiO 2 (0.3% Fe 3+ ) as the best performing photocatalyst. The monoazo dye experienced higher degradation efficiency than the diazo dye. Degradation of the azo dyes was observed to decrease with increasing pH from 2 to 12. Increased visible light intensity enhanced the photodegradation efficiency of the dye. Dye decolourization was observed to be faster than its mineralization.

show abstract

Photocatalytic Decolourization and Degradation of C. I. Basic Blue 41 Using TiO<sub>2</sub> Nanoparticles

Cited by 46 publications

References 41 publications

Effect of Dye Type on Montmorillonite-Supported Pr-Doped TiO₂Composite Photocatalsyt

Effect of Dye Type on Montmorillonite-Supported Pr-Doped TiO₂Composite Photocatalsyt

Synthesis, characterization and photocatalytic activity of silver nanoparticles/amidoxime-modified polyacrylonitrile nanofibers

Comparative photocatalytic degradation of monoazo and diazo dyes under simulated visible light using Fe3+/C/S doped-TiO2 nanoparticles

Contact Info

Product

Resources

About

Photocatalytic Decolourization and Degradation of C. I. Basic Blue 41 Using TiO&lt;sub&gt;2&lt;/sub&gt; Nanoparticles

Cited by 46 publications

References 41 publications

Effect of Dye Type on Montmorillonite-Supported Pr-Doped TiO2Composite Photocatalsyt

Effect of Dye Type on Montmorillonite-Supported Pr-Doped TiO2Composite Photocatalsyt

Synthesis, characterization and photocatalytic activity of silver nanoparticles/amidoxime-modified polyacrylonitrile nanofibers

Comparative photocatalytic degradation of monoazo and diazo dyes under simulated visible light using Fe3+/C/S doped-TiO2 nanoparticles

Contact Info

Product

Resources

About

Photocatalytic Decolourization and Degradation of C. I. Basic Blue 41 Using TiO<sub>2</sub> Nanoparticles

Effect of Dye Type on Montmorillonite-Supported Pr-Doped TiO₂Composite Photocatalsyt

Effect of Dye Type on Montmorillonite-Supported Pr-Doped TiO₂Composite Photocatalsyt