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Sacrificial Hydrogen Generation From Aqueous Triethanolamine With Eosin Y-Sensitized Pt/Tio2 Photocatalyst In Uv, Visible And Solar Light Irradiation, Pankaj Chowdhury, Hassan Gomaa, Ajay Ray
Sacrificial Hydrogen Generation From Aqueous Triethanolamine With Eosin Y-Sensitized Pt/Tio2 Photocatalyst In Uv, Visible And Solar Light Irradiation, Pankaj Chowdhury, Hassan Gomaa, Ajay Ray
PC
In this paper, we have studied Eosin Y-sensitized sacrificial hydrogen generation with triethanolamine as electron donor in UV, visible, and solar light irradiation. Aeroxide TiO2 was loaded with platinum metal via solar photo-deposition method to reduce the electron hole recombination process. Photocatalytic sacrificial hydrogen generation was influenced by several factors such as platinum loading (wt%) on TiO2, solution pH, Eosin Y to Pt/TiO2 mass ratio, triethanolamine concentration, and light (UV, visible and solar) intensities. Detailed reaction mechanisms in visible and solar light irradiation were established. Oxidation of triethanolamine and formaldehyde formation was correlated with hydrogen generation in both visible and …
Photocatalytic Processes For The Removal Of Toxic Metal Ions, Pankaj Chowdhury, Ali Elkamel, Ajay Ray
Photocatalytic Processes For The Removal Of Toxic Metal Ions, Pankaj Chowdhury, Ali Elkamel, Ajay Ray
PC
No abstract provided.
Sacrificial Hydrogen Generation From Formaldehyde With Pt/Tio2 Photocatalyst In Solar Radiation, Pankaj Chowdhury, Ghodsieh Malekshoar, Madhumita Ray, Jesse Zhu, Ajay Ray
Sacrificial Hydrogen Generation From Formaldehyde With Pt/Tio2 Photocatalyst In Solar Radiation, Pankaj Chowdhury, Ghodsieh Malekshoar, Madhumita Ray, Jesse Zhu, Ajay Ray
PC
In this work, solar TiO2 photocatalysis was used for sacrificial hydrogen generation from formaldehyde. Platinum was loaded onto a TiO2 photocatalyst by a solar photodeposition method to suppress the electron/hole recombination process. The photocatalyst inside the reactor was irradiated from the top with a solar simulator. Photocatalytic hydrogen generation from formaldehyde was influenced by the solution pH, platinum loading (wt %) on TiO2, catalyst concentration, light intensity, and initial formaldehyde concentration. A Langmuir-type model fitted well with the experimental data, and the values of surface reaction rate constant, k, and the adsorption equilibrium constant, K, are 2.3598 × 10–6 mol …
Dye-Sensitized Photocatalyst: A Breakthrough In Green Energy And Environmental Detoxification, Pankaj Chowdhury, Hassan Gomaa, Ajay Ray
Dye-Sensitized Photocatalyst: A Breakthrough In Green Energy And Environmental Detoxification, Pankaj Chowdhury, Hassan Gomaa, Ajay Ray
PC
No abstract provided.
Visible-Solar-Light-Driven Photocatalytic Degradation Of Phenol With Dye-Sensitized Tio2: Parametric And Kinetic Study, Pankaj Chowdhury, Jesus Moreira, Hassan Gomaa, Ajay Ray
Visible-Solar-Light-Driven Photocatalytic Degradation Of Phenol With Dye-Sensitized Tio2: Parametric And Kinetic Study, Pankaj Chowdhury, Jesus Moreira, Hassan Gomaa, Ajay Ray
PC
Phenol degradation with TiO2 photocatalyst under UV light is known to be an effective method. Under solar radiation, however, this approach does not receive adequate photons for catalyst activation, as the solar spectrum comprises mostly visible light (46%). In this study, we applied the dye-sensitization technique to prepare visible-light-active catalyst and used it under visible solar light generated from a solar simulator with a UV cutoff filter (λ > 420 nm) for phenol degradation. Eosin Y dye was used as a sensitizer for the TiO2 catalyst with a very low level of platinum as a cocatalyst. Triethanolamine was used as a …
Factorial Design Analysis For Dye-Sensitized Hydrogen Generation From Water, Pankaj Chowdhury, Hassan Gomaa, Ajay Ray
Factorial Design Analysis For Dye-Sensitized Hydrogen Generation From Water, Pankaj Chowdhury, Hassan Gomaa, Ajay Ray
PC
A factorial design at two levels and four factors has been carried out in order to investigate the potential for hydrogen generation using Eosin Y-sensitized TiO2/Pt catalyst under visible solar light in presence of triethanolamine (TEOA) as electron donor. The solution pH was found to be a significant parameter, and was maintained at pH 7.0 throughout the investigation. Visible light irradiation time (I-time) showed highest positive effect on hydrogen generation followed by initial Eosin Y concentration (for dye-sensitization) and the TEOA concentration while Pt content (wt %) in TiO2 showed negative effect toward hydrogen generation. Experimental data were analyzed using …
Biological Treatment Processes For Fish Processing Wastewater–A Review, Pankaj Chowdhury, T. Viraraghavan, A. Srinivasan
Biological Treatment Processes For Fish Processing Wastewater–A Review, Pankaj Chowdhury, T. Viraraghavan, A. Srinivasan
PC
Water consumption in a fish-processing industry and high-strength wastewater from such an industry are of great concern world-wide. Liquid effluent regulations are becoming more stringent day by day. Biological treatment is the best option for such a wastewater. Anaerobic processes such as upflow anaerobic sludge blanket (UASB) reactor, anaerobic filter (AF) and anaerobic fluidized bed (AFB) reactor can achieve high (80–90%) organics removal and produce biogas. Aerobic processes such as activated sludge, rotating biological contactor, trickling filter and lagoons are also suitable for organics removal. Anaerobic digestion followed by an aerobic process is an optimal process option for fish processing …
Saw Dust And Neem Bark As Low-Cost Natural Biosorbent For Adsorptive Removal Of Zn (Ii) And Cd (Ii) Ions From Aqueous Solutions, Tarun Naiya, Pankaj Chowdhury, Ashim Bhattacharya, Sudip Das
Saw Dust And Neem Bark As Low-Cost Natural Biosorbent For Adsorptive Removal Of Zn (Ii) And Cd (Ii) Ions From Aqueous Solutions, Tarun Naiya, Pankaj Chowdhury, Ashim Bhattacharya, Sudip Das
PC
The ability of saw dust and neem bark as low-cost natural adsorbents were investigated for adsorptive removal of Zn(II) and Cd(II) ions from aqueous solutions. Various physico-chemical parameters such as pH, initial metal ion concentration, and adsorbent dosage level and equilibrium contact time were studied. The optimum pH for adsorption was found to be 5 for Zn(II) and 6 for Cd(II). Kinetics data were best described by pseudo-second-order model. Mass transfer coefficients were also determined for individual adsorbents for removal of Zn(II) and Cd(II) ions from aqueous solutions. The equilibrium adsorption data were fitted to Langmuir and Freundlich isotherm models …
Sonochemical Degradation Of Chlorinated Organic Compounds, Phenolic Compounds And Organic Dyes–A Review, Pankaj Chowdhury, T. Viraraghavan
Sonochemical Degradation Of Chlorinated Organic Compounds, Phenolic Compounds And Organic Dyes–A Review, Pankaj Chowdhury, T. Viraraghavan
PC
Sonochemical processes have been widely used in chemistry and chemical engineering field. Recently, these processes have found new applications in the environmental field, because of advantages in terms of operational simplicity, secondary pollutant formation and safety. Several studies have reported on sonochemical degradation of organic compounds that are toxic in nature. The objective of this review was to identify and examine some of the studies on sonochmical degradation of chlorinated organic compounds, phenolic compounds and organic dyes. This review also examines the basic theory of sonochemical reactions and the use of sonochemical reactors for environmental applications.
Air Stripping In Industrial Wastewater Treatment, A. Srinivasan, Pankaj Chowdhury, T. Viraraghavan
Air Stripping In Industrial Wastewater Treatment, A. Srinivasan, Pankaj Chowdhury, T. Viraraghavan
PC
No abstract provided.