Photo catalytic degradation by using Nanocatalyst
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Presentation on photocatalytic degradation of industrial dyes, pollutants and CO2 reduction
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Sonocatalytic Performance of Fe3O4 Cluster Microspheres Gratiphic Carbon Comp...
Fe3O4 g C3N4 composite was synthesized using hydrothermal simple and facile techniques. The sonocatalytic activity of the magnetic Fe3O4 g C3N4 composite was studied through the H2O2 assisted system for degradation of water soluble organic pollutants such as methylene blue MB , rhodamine B RhB and methyl orange MO . X ray diffraction XRD and scanning electron microscopy SEM equipped were employed for the characterizing the structure and morphology of the so synthesized nanohybrid. The integration of H2O2 and catalyst dosage enhaced the sonocatalytic degradation of dyes. Furthermore, the magnetic property of the sample leaded to easier separation of the microhybrid, made it recyclable with a negligible decline in the dye degradation even after four consecutive recycles. Xuan Sang Nguyen "Sonocatalytic Performance of Fe3O4 Cluster Microspheres/Gratiphic Carbon Composite for Efficient Degradation of Organic Dyes" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-7 | Issue-3 , June 2023, URL: https://www.ijtsrd.com.com/papers/ijtsrd57418.pdf Paper URL: https://www.ijtsrd.com.com/chemistry/environmental-chemistry/57418/sonocatalytic-performance-of-fe3o4-cluster-microspheresgratiphic-carbon-composite-for-efficient-degradation-of-organic-dyes/xuan-sang-nguyen
Preparation, characterization and application of sonochemically doped fe3+ in...
Abstract In this present study, mechanistic investigation of ultrasound–assisted dye decolorization/degradation was investigated using sonochemically prepared Fe3+ doped ZnO. Fe3+ doped ZnO nanoparticle was prepared under ultrasound (20 kHz) irradiation using a doping concentration of 2 wt% of Fe(III). To investigate the catalytic activity of Fe3+ doped ZnO, Acid Red 14 (azo dye) was chosen for decolorization/degradation using sonolysis, photocatalysis and sono–photocatalysis processes. To study the influence of dopant onto structure, crystallinity, and optical properties, different analytical analyses were performed such as X–ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Zeta potential, Delsa Nano Particle Size Analyzer (PSA), Vibrating Sample Magnetometer analysis (VSM) and Field Emission Scanning Electron Microscopy (FE–SEM) etc. For photocatalytic experiments, a blended high pressure mercury UV lamp with maximum peak emission at 365 nm was used. The decolorization/degradation of dye with modified photocatalyst showed faster reaction kinetics under sono–photocatalytic process. Ultrasound showed an additive effect for degradation/decolorization process. The maximum decolorization of AR14 was achieved (~ 82%) under sono–photocatlytic process with an initial dye concentration of 20 ppm. The sono–photocatalysis process showed 1.4 – 1.6 higher reaction rates with Fe–doped ZnO than pure ZnO. Index Terms: ZnO, Fe–ZnO, Fe-doped ZnO, Sonocatalytic, Photocatalytic, Advanced Oxidation Process, AOP
Preparation, characterization and application of
This document describes the preparation and characterization of Fe3+-doped ZnO nanoparticles for use in decolorizing the azo dye Acid Red 14. Fe3+-doped ZnO was prepared using an ultrasound-assisted impregnation method, doping ZnO with 2 wt% Fe(III) over 1 hour of sonication. Characterization using XRD, FTIR, particle size analysis, BET surface area, FE-SEM, and VSM showed the Fe3+ ions were successfully doped into the ZnO lattice without changing its wurtzite crystal structure. Decolorization experiments using the Fe-doped ZnO showed it had higher reaction rates than pure ZnO for decolorizing Ac
Reduced graphene oxide–CuO nanocomposites for photocatalyticconversion of CO2...
Reduced graphene oxide (rGO)–copper oxide nanocomposites are prepared by covalent grafting of CuOnanorods on the rGO skeleton. Chemical and structural features of rGO–CuO nanocomposites are probedby FTIR, XPS, XRD and HRTEM analyses. Photocatalytic potential of rGO–CuO nanocomposites is exploredfor reduction of CO2into the methanol under the visible light irradiation. The breadth of CuO nanorods andthe oxidation state of Cu in the rGO–CuO/Cu2O nanocomposites are systematically varied to investigatetheir photocatalytic activities. The pristine CuO nanorods exhibited very low photocatalytic activity owingto fast recombination of charge carriers and yielded 175 mol g−1methanol, whereas rGO–Cu2O andrGO–CuO exhibited significantly improved photocatalytic activities and yielded five (862 mol g−1) andseven (1228 mol g−1) folds methanol, respectively. The superior photocatalytic activity of CuO in therGO–CuO nanocomposites was attributed to slow recombination of charge carriers and efficient transferof photo-generated electrons through the rGO skeleton. This study further excludes the use of scavengingdonor.
Reduced graphene oxide–CuO nanocomposites for photocatalyticconversion of CO2...
tReduced graphene oxide (rGO)–copper oxide nanocomposites are prepared by covalent grafting of CuOnanorods on the rGO skeleton. Chemical and structural features of rGO–CuO nanocomposites are probedby FTIR, XPS, XRD and HRTEM analyses. Photocatalytic potential of rGO–CuO nanocomposites is exploredfor reduction of CO2into the methanol under the visible light irradiation. The breadth of CuO nanorods andthe oxidation state of Cu in the rGO–CuO/Cu2O nanocomposites are systematically varied to investigatetheir photocatalytic activities. The pristine CuO nanorods exhibited very low photocatalytic activity owingto fast recombination of charge carriers and yielded 175 mol g−1methanol, whereas rGO–Cu2O andrGO–CuO exhibited significantly improved photocatalytic activities and yielded five (862 mol g−1) andseven (1228 mol g−1) folds methanol, respectively. The superior photocatalytic activity of CuO in therGO–CuO nanocomposites was attributed to slow recombination of charge carriers and efficient transferof photo-generated electrons through the rGO skeleton. This study further excludes the use of scavengingdonor.
Spatial charge separation on the (110)/(102) facets of cocatalyst-free ZnIn2S...
Photorefining of biomass and its derivatives to value-added chemicals is an alternative solution to address the global energy shortage and environmental issues. Herein, efficient and selective oxidation of 5-hydroxymethylfurfural (HMF, 91.1% conversion) to 2,5-diformylfuran (DFF, 99.4% selectivity) is demonstrated by visible light-driven photocatalysis over cocatalyst-free ZnIn2S4 nanosheets with crystal facet engineering. The spatial accumulation of photogenerated electrons and holes on the (110) and (102) crystal facets triggers a two-electron oxygen reduction reaction (2e-ORR) for H2O2 generation and HMF oxidation into DFF, respectively. The severe attenuation of photostability is caused by the irreversible photocorrosion of Zn–S with the formation of Zn–O chemical bonds by the formation of ˙OH from the in situ decomposition of H2O2. Spontaneous substitution of oxygen with sulfur has been proven to efficiently improve the photostability of ZnIn2S4. This present work provides insights into improving the durability of ZnIn2S4 and sheds new light on biomass valorization via photorefinery.
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The document summarizes research on the fabrication of iron oxide microrods (MRs) with different crystal phases through a solvothermal method and annealing processes. It was found that carbon remained in the structures when annealing at low temperature (150°C), contributing to higher dye adsorption and drug loading capabilities. The Fe3O4-C sample showed superior adsorption of cationic and anionic dyes. When applied as a drug carrier, the MRs achieved mass loading ratios of 12.9% for chemical loading and 7.8% for physical loading of tissue plasminogen activator. The magnetic structures show potential for applications in water treatment and medicine.
Graphene oxide immobilized copper phthalocyanine tetrasulphonamide: the first...
The first successful synthesis of DMC directly from methanol and carbon dioxide using a heterogenized
homogeneous graphene oxide immobilized copper phthalocyanine tetrasulphonamide catalyst in the
presence of N,N0-dicyclohexylcarbodiimide (DCC) as a dehydrating agent is described. The presence of a
dehydrating agent was found to be vital and in its absence the yield of DMC was found to be decreased
significantly. Under the optimized reaction conditions, the maximum yield of DMC reaches up to 13.3%.
Although the homogeneous copper phthalocyanine tetrasulphonamide catalyst provided a little higher
yield of DMC (14.2%), the facile recovery and recycling ability of the heterogeneous catalyst make the
developed method more attractive from environmental and economical viewpoints.
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Sonocatalytic Performance of Fe3O4 Cluster Microspheres Gratiphic Carbon Comp...
Fe3O4 g C3N4 composite was synthesized using hydrothermal simple and facile techniques. The sonocatalytic activity of the magnetic Fe3O4 g C3N4 composite was studied through the H2O2 assisted system for degradation of water soluble organic pollutants such as methylene blue MB , rhodamine B RhB and methyl orange MO . X ray diffraction XRD and scanning electron microscopy SEM equipped were employed for the characterizing the structure and morphology of the so synthesized nanohybrid. The integration of H2O2 and catalyst dosage enhaced the sonocatalytic degradation of dyes. Furthermore, the magnetic property of the sample leaded to easier separation of the microhybrid, made it recyclable with a negligible decline in the dye degradation even after four consecutive recycles. Xuan Sang Nguyen "Sonocatalytic Performance of Fe3O4 Cluster Microspheres/Gratiphic Carbon Composite for Efficient Degradation of Organic Dyes" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-7 | Issue-3 , June 2023, URL: https://www.ijtsrd.com.com/papers/ijtsrd57418.pdf Paper URL: https://www.ijtsrd.com.com/chemistry/environmental-chemistry/57418/sonocatalytic-performance-of-fe3o4-cluster-microspheresgratiphic-carbon-composite-for-efficient-degradation-of-organic-dyes/xuan-sang-nguyen
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Preparation, characterization and application of
This document describes the preparation and characterization of Fe3+-doped ZnO nanoparticles for use in decolorizing the azo dye Acid Red 14. Fe3+-doped ZnO was prepared using an ultrasound-assisted impregnation method, doping ZnO with 2 wt% Fe(III) over 1 hour of sonication. Characterization using XRD, FTIR, particle size analysis, BET surface area, FE-SEM, and VSM showed the Fe3+ ions were successfully doped into the ZnO lattice without changing its wurtzite crystal structure. Decolorization experiments using the Fe-doped ZnO showed it had higher reaction rates than pure ZnO for decolorizing Ac
Reduced graphene oxide–CuO nanocomposites for photocatalyticconversion of CO2...
Reduced graphene oxide (rGO)–copper oxide nanocomposites are prepared by covalent grafting of CuOnanorods on the rGO skeleton. Chemical and structural features of rGO–CuO nanocomposites are probedby FTIR, XPS, XRD and HRTEM analyses. Photocatalytic potential of rGO–CuO nanocomposites is exploredfor reduction of CO2into the methanol under the visible light irradiation. The breadth of CuO nanorods andthe oxidation state of Cu in the rGO–CuO/Cu2O nanocomposites are systematically varied to investigatetheir photocatalytic activities. The pristine CuO nanorods exhibited very low photocatalytic activity owingto fast recombination of charge carriers and yielded 175 mol g−1methanol, whereas rGO–Cu2O andrGO–CuO exhibited significantly improved photocatalytic activities and yielded five (862 mol g−1) andseven (1228 mol g−1) folds methanol, respectively. The superior photocatalytic activity of CuO in therGO–CuO nanocomposites was attributed to slow recombination of charge carriers and efficient transferof photo-generated electrons through the rGO skeleton. This study further excludes the use of scavengingdonor.
Reduced graphene oxide–CuO nanocomposites for photocatalyticconversion of CO2...
tReduced graphene oxide (rGO)–copper oxide nanocomposites are prepared by covalent grafting of CuOnanorods on the rGO skeleton. Chemical and structural features of rGO–CuO nanocomposites are probedby FTIR, XPS, XRD and HRTEM analyses. Photocatalytic potential of rGO–CuO nanocomposites is exploredfor reduction of CO2into the methanol under the visible light irradiation. The breadth of CuO nanorods andthe oxidation state of Cu in the rGO–CuO/Cu2O nanocomposites are systematically varied to investigatetheir photocatalytic activities. The pristine CuO nanorods exhibited very low photocatalytic activity owingto fast recombination of charge carriers and yielded 175 mol g−1methanol, whereas rGO–Cu2O andrGO–CuO exhibited significantly improved photocatalytic activities and yielded five (862 mol g−1) andseven (1228 mol g−1) folds methanol, respectively. The superior photocatalytic activity of CuO in therGO–CuO nanocomposites was attributed to slow recombination of charge carriers and efficient transferof photo-generated electrons through the rGO skeleton. This study further excludes the use of scavengingdonor.
Spatial charge separation on the (110)/(102) facets of cocatalyst-free ZnIn2S...
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The document summarizes research on the fabrication of iron oxide microrods (MRs) with different crystal phases through a solvothermal method and annealing processes. It was found that carbon remained in the structures when annealing at low temperature (150°C), contributing to higher dye adsorption and drug loading capabilities. The Fe3O4-C sample showed superior adsorption of cationic and anionic dyes. When applied as a drug carrier, the MRs achieved mass loading ratios of 12.9% for chemical loading and 7.8% for physical loading of tissue plasminogen activator. The magnetic structures show potential for applications in water treatment and medicine.
Graphene oxide immobilized copper phthalocyanine tetrasulphonamide: the first...
The first successful synthesis of DMC directly from methanol and carbon dioxide using a heterogenized
homogeneous graphene oxide immobilized copper phthalocyanine tetrasulphonamide catalyst in the
presence of N,N0-dicyclohexylcarbodiimide (DCC) as a dehydrating agent is described. The presence of a
dehydrating agent was found to be vital and in its absence the yield of DMC was found to be decreased
significantly. Under the optimized reaction conditions, the maximum yield of DMC reaches up to 13.3%.
Although the homogeneous copper phthalocyanine tetrasulphonamide catalyst provided a little higher
yield of DMC (14.2%), the facile recovery and recycling ability of the heterogeneous catalyst make the
developed method more attractive from environmental and economical viewpoints.
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This document describes a final thesis on using the photocatalyst ZnFe2O4/TiO2 to reduce carbon dioxide into methanol under visible light irradiation. The research objectives were to synthesize and characterize ZnFe2O4/TiO2, and evaluate its activity for CO2 conversion. ZnFe2O4 and TiO2 were synthesized separately then coupled using ultrasonication. Characterization methods included FTIR, UV-Vis, TGA, FESEM. Photocatalytic testing showed the maximum methanol yield was 141.22 μmol/gcat.hr using ZnFe2O4/TiO2 with a 1:1 ratio, illuminated for 5.5 hours. Future work could co-synthesize Zn
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A highly efficient, recyclable and magnetically separable core-shell structured CuZnO@Fe3O4 microsphere
wrapped with reduced graphene oxide (rGO@CuZnO@Fe3O4) photocatalyst has been developed and used
for the photoreduction of carbon dioxide with water to produce methanol under visible light irradiation.
Owing to the synergistic effect of the components and to the presence of a thin Fe2O3 layer on Fe3O4,
rGO@CuZnO@Fe3O4 4 exhibited higher catalytic activity as compared to the other possible combinations
such as CuZnO@Fe3O4 2 and GO@CuZnO@Fe3O4 3 microspheres. The yield of methanol in case of using
2 and 3 as photocatalyst was found to be 858 and 1749 mol g−1 cat, respectively. However, the yield
was increased to 2656 mol g−1 cat when rGO@CuZnO@Fe3O4 4 was used as photocatalyst under similar
experimental conditions. This superior photocatalytic activity of 4 was assumed to be due to the
restoration of the sp2 hybridized aromatic system in rGO, which facilitated the movement of electrons
and resulted in better charge separation. The synthesized heterogeneous photocatalyst could readily be
recovered by external magnet and successfully reused for six subsequent cycles without significant loss
in the product yield
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This document describes a final thesis on using the photocatalyst ZnFe2O4/TiO2 to reduce carbon dioxide into methanol under visible light irradiation. The research objectives were to synthesize and characterize ZnFe2O4/TiO2, and evaluate its activity for CO2 conversion. ZnFe2O4 and TiO2 were synthesized separately then coupled using ultrasonication. Characterization methods included FTIR, UV-Vis, TGA, FESEM. Photocatalytic testing showed the maximum methanol yield was 141.22 μmol/gcat.hr using ZnFe2O4/TiO2 with a 1:1 ratio, illuminated for 5.5 hours. Future work could co-synthesize Zn
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A highly efficient, recyclable and magnetically separable core-shell structured CuZnO@Fe3O4 microsphere
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Owing to the synergistic effect of the components and to the presence of a thin Fe2O3 layer on Fe3O4,
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such as CuZnO@Fe3O4 2 and GO@CuZnO@Fe3O4 3 microspheres. The yield of methanol in case of using
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Gjesm volume 7 issue 4_pages 485-502
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Roll of nanomaterials in water treatment as photocatalysts copy
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IJSRED-V2I3P48
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Synthesis and optimisation of ir o2 electrocatalysts by adams fusion method f...
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Photo catalytic degradation by using Nanocatalyst
- 1. Controlled Synthesis of Ag-Sn𝐎𝟐/α- 𝐅𝐞𝟐𝐎𝟑 Nanocomposites for Improving Visible-Light Catalytic Activities of Pollutant Degradation and C𝐎𝟐 Reduction Presented by : Muhammad Zaka Ansar 133-FoS/PhDPHY/F-23 Presented to: Dr. Imran Murtaza
- 2. Purpose of the research • Environmental pollution is increasing day by day. • The US Environmental Protection Agency has listed 2,4-DCP as one of the most toxic pollutants • It is highly desirable to develop green and efficient techniques to degrade organic pollutants, such as 2,4-DCP, in water.
- 3. Research Problem • Low Efficiency of Traditional Photocatalysts • Limited Light Absorption • Stability and Recyclability • Selective Catalysis • Scalability and Cost-effectiveness
- 4. The Strategy • The hematite α- Fe2O3 is a promising photocatalyst candidate but it has short recombination time and hence poor charge separation • One of the most applied strategies is to introduce another semiconductor to couple with α- Fe2O3, forming a heterojunction • To increase the catalytic efficiency a co catalyst is also needed to be attached with the heterojunction
- 6. The Synthesis Process for FO nanosheets
- 7. The Synthesis Process for SO nanosheets
- 9. Synthesis of Ag-SO/FO SO/FO in ethanol AgNO3 with different % age Sonication Beaker is sealed, O2 is flushed out
- 10. XRD and DRS
- 11. Morphology of Samples by using TEM
- 12. Analysis of Ag-Sn𝐎𝟐/-𝐅𝐞𝟐𝐎𝟑 Nanocomposites XPS of NCs SEM Micrographs of SnO2, Fe2O3 nanosheets and Ag nanorods
- 13. (a) FS related to produced hydroxyl radicals under visible-light irradiation (b) SS-SPS signals for FO, 5SO/FO, and 2Ag-5SO/FO, respectively Charge Separation Characteristics Degradation & Reduction Characteristics Photocatalytic activities for 2,4-DCP degradation of FO, 5SO/FO, and 2Ag-5SO/FO respectively, under visible-light irradiation in the presence of different scavengers.
- 14. Degradation of DCP Photocatalytic aerobic degradation for 2,4-DCP over (a) FO, xSO/FO; (b) yAg-5SO/FO samples under visible-light irradiation. Note :(x indicates the mass ratio (1, 3, 5, and 7%) of SO relative to FO, and y indicates the mass ratio (0.5, 1, 2, and 3%) of Ag NPs relative to 5SO/FO respectively.
- 15. Degradation of BPA and MO and CO2 Reduction Visible light aerobic degradation of (a) MO and BPA; (b) and CO2 reduction Recycle test of 2Ag-5SO/FO for photocatalytic 2,4-DCP degradation.
- 17. 17 Thank you for your attention Questions……?