Laser induced photocatalytic degradation of hazardous dye (Safranin-O) using self synthesized nanocrystalline WO3

Hayat, Khizar; Gondal, M.A.; Khaled, Mazen; Yamani, Zain H.; Ahmed, Shakeel

doi:10.1016/j.jhazmat.2010.11.133

Cited by 88 publications

(30 citation statements)

References 32 publications

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“…[11][12][13][14][15] The results achieved through this study would be helpful in understanding the process of photocatalytic removal of MB by combined use of GNPs and laser. It would offer a novel technique for the control of environmental pollution.…”

Section: Introductionmentioning

confidence: 90%

“…Operational parameters, such as initial dye concentration, laser irradiation time, laser energy, and pH of the nanoparticle suspension have been reported to have significant roles in the dye removal process. [10][11][12][13][14][15] Thus, these parameters were chosen for study in this work. The kinetic model of the decolorization reaction was also explored.…”

Section: Introductionmentioning

confidence: 99%

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Decolorization of methylene blue in aqueous suspensions of gold nanoparticles using parallel nanosecond pulsed laser

Zong

Liu

et al. 2013

Journal of Environmental Science and Health, Part A

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Using 532 nm parallel nanosecond pulsed laser, the decolorization of methylene blue (MB) in aqueous suspensions of gold nanoparticles (GNPs) was studied. The effects of various experimental parameters, such as irradiation time, laser energy, and initial MB concentration on the decolorization rate were investigated. Experiments using real samples of textile dyeing wastewater were also carried out to examine the effectiveness of the method in more complex samples. From the results, the following conclusions may be drawn: (i) Under the optimum conditions (pH 7.19, 135 mJ laser energy, 4 mg/L MB concentration, and 11.6 mg/L GNP concentration), the rate of MB decolorization could reach 94% in 15 min. The decolorization follows pseudo-first-order kinetics; (ii) The amount of MB decreased rapidly during the decolorization. No intermediates of the decolorization could be detected by high-performance liquid chromatography. These observations indicate that MB was decolorized through a very rapid degradation mechanism; (iii) The rate of MB decolorization increased with the increase in laser energy (at laser energies of 0 to 135 mJ); and, (iv) The efficient decolorization of MB in real samples of textile dyeing wastewater was achieved at a decolorization rate of about 85% in 15 min.

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Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Decolorization of methylene blue in aqueous suspensions of gold nanoparticles using parallel nanosecond pulsed laser

Zong

Liu

et al. 2013

Journal of Environmental Science and Health, Part A

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“…The adsorption efficiencies of MB over the Al 2 O 3 /TiO 2 composites were all less than 2%, and the degradation efficiencies were greatly enhanced due to photocatalysis. The photocatalytic reactions followed the Langmuir-Hinshelwood pseudo-first-order kinetics model when the initial concentrations of the reactants were low [2,32,[53][54][55]. The kinetics equation can be expressed as follows [32]:…”

Section: Photocatalytic Activity Of Various Al 2 O 3 /Tio 2 Materialsmentioning

confidence: 99%

N-doped P25 TiO2–amorphous Al2O3 composites: One-step solution combustion preparation and enhanced visible-light photocatalytic activity

Zhao

Hao

et al. 2012

Journal of Hazardous Materials

136

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“…A large number of semiconductor materials as photocatalyst have been developed, such as TiO 2 [2,3], ZnO [4][5][6][7], WO 3 [8,9], BiVO 4 [10][11][12], Bi 2 WO 6 [13,14] and BiOX [15][16][17][18][19][20][21]. However, the low photocatalytic efficiency and unfavorable chemical stability still hinders their practical application in elimination of the environmental hazardous contaminants.…”

Section: Introductionmentioning

confidence: 99%

Study of the sulfurized (BiO)2CO3 as efficient visible-light induced photocatalyst

Zhao

et al. 2015

J Mater Sci: Mater Electron

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In this study, the sulfurized (BiO) 2 CO 3 heterostructures were synthesized using a facile liquid-phase sulfurization strategy and characterized by XRD, SEM, FT-IR, XPS, UV-Vis DRS and PL techniques. It is found that sulfurization shifts slightly XRD diffraction peaks toward to lower Bragg angle, enhances significantly the optical absorption and reduces the recombination of photogenerated electrons and holes. Based on the experimental results, it is considered that novel Bi 2 S 3 /(BiO) 2 CO 3 heterostructures with S doping (oxygen atoms substituted by sulfur) were successfully constructed. The as-obtained photocatalysts showed excellent photocatalytic activity for degradation of reactive brilliant blue (KN-R), as compared with that of pure (BiO) 2 CO 3 under sunlight irradiation. The enhanced photocatalytic performance may be ascribed to the role of Bi 2 S 3 / (BiO) 2 CO 3 heterostructure and S doping, which causes high absorption efficiency of light and efficient separation of photoinduced carriers in sulfurized (BiO) 2 CO 3 .

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Laser induced photocatalytic degradation of hazardous dye (Safranin-O) using self synthesized nanocrystalline WO3

Cited by 88 publications

References 32 publications

Decolorization of methylene blue in aqueous suspensions of gold nanoparticles using parallel nanosecond pulsed laser

Decolorization of methylene blue in aqueous suspensions of gold nanoparticles using parallel nanosecond pulsed laser

N-doped P25 TiO2–amorphous Al2O3 composites: One-step solution combustion preparation and enhanced visible-light photocatalytic activity

Study of the sulfurized (BiO)2CO3 as efficient visible-light induced photocatalyst

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