Vivek Polshettiwar

Publications (48) View all

• Article: Nano-ferrites for water splitting: unprecedented high photocatalytic hydrogen production under visible light.

  Priti A Mangrulkar, Vivek Polshettiwar, Nitin K Labhsetwar, Rajender S Varma, Sadhana S Rayalu
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  ABSTRACT: In the present investigation, hydrogen production via water splitting by nano-ferrites was studied using ethanol as the sacrificial donor and Pt as co-catalyst. Nano-ferrite is emerging as a promising photocatalyst with a hydrogen evolution rate of 8.275 μmol h(-1) and a hydrogen yield of 8275 μmol h(-1) g(-1) under visible light compared to 0.0046 μmol h(-1) for commercial iron oxide (tested under similar experimental conditions). Nano-ferrites were tested in three different photoreactor configurations. The rate of hydrogen evolution by nano-ferrite was significantly influenced by the photoreactor configuration. Altering the reactor configuration led to sevenfold (59.55 μmol h(-1)) increase in the hydrogen evolution rate. Nano-ferrites have shown remarkable stability in hydrogen production up to 30 h and the cumulative hydrogen evolution rate was observed to be 98.79 μmol h(-1). The hydrogen yield was seen to be influenced by several factors like photocatalyst dose, illumination intensity, irradiation time, sacrificial donor and presence of co-catalyst. These were then investigated in detail. It was evident from the experimental data that nano-ferrites under optimized reaction conditions and photoreactor configuration could lead to remarkable hydrogen evolution activity under visible light. Temperature had a significant role in enhancing the hydrogen yield.
  Nanoscale 07/2012; 4(16):5202-9. · 5.91 Impact Factor
• Article: Nanoroses of nickel oxides: synthesis, electron tomography study, and application in CO oxidation and energy storage.

  Aziz Fihri, Rachid Sougrat, Raghavan Baby Rakhi, Raed Rahal, Dongkyu Cha, Mohamed Nejib Hedhili, Mohamed Bouhrara, Husam N Alshareef, Vivek Polshettiwar
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  ABSTRACT: Nickel oxide and mixed-metal oxide structures were fabricated by using microwave irradiation in pure water. The nickel oxide self-assembled into unique rose-shaped nanostructures. These nickel oxide roses were studied by performing electron tomography with virtual cross-sections through the particles to understand their morphology from their interior to their surface. These materials exhibited promising performance as nanocatalysts for CO oxidation and in energy storage devices.
  ChemSusChem 04/2012; 5(7):1241-8. · 6.83 Impact Factor
• Article: Nanoscience makes catalysis greener.

  Vivek Polshettiwar, Jean-Marie Basset, Didier Astruc
  ChemSusChem 01/2012; 5(1):6-8. · 6.83 Impact Factor
• Source

  Available from: Farhan Ahmad Pasha

  Article: Efficient Hydrogenolysis of Alkanes at Low Temperature and Pressure Using Tantalum Hydride on MCM-41, and a Quantum Chemical Study

  Vivek Polshettiwar, Farhan, A Pasha, A De Mallmann, S Norsic, Jean Thivolle-Cazat, Jean-Marie Basset
  ChemCatChem 01/2012; 4:363-369. · 5.21 Impact Factor
• Article: Fibrous nano-silica (KCC-1)-supported palladium catalyst: Suzuki coupling reactions under sustainable conditions.

  Aziz Fihri, Dongkyu Cha, Mohamed Bouhrara, Noor Almana, Vivek Polshettiwar
  ChemSusChem 11/2011; 5(1):85-9. · 6.83 Impact Factor