Articles written in Bulletin of Materials Science

    • Metal nanoparticle doped coloured coatings on glasses and plastics through tuning of surface plasmon band position

      Goutam De Samar Kumar Medda Sucheta De Sudipto Pal

      More Details Abstract Fulltext PDF

      Several noble metal nanoparticles doped sol–gel derived thin coloured films have been synthesized and characterized. These are pure (Ag, Au, Cu and Pt), mixed/alloy (Ag–Cu, Au–Cu, Au–Ag and Au–Pt) nanoparticles in SiO2, Au in mixed SiO2–TiO2 and SiO2–ZrO2, Au and Ag nanoparticles in inorganic–organic hybrid film matrices etc. This investigation leads to the development of tailor-made coloured coatings by tuning the surface plasmon resonance (SPR) band positions originating from the embedded nanometals by controlling mainly

      refractive index of the film matrices and

      nanoalloy composition. In the later case a new layerby-layer (two-layer) synthetic protocol has been developed to prepare binary nanoalloy particles with controlled atomic ratios.

    • Diatomite/silver phosphate composite for efficient degradation of organic dyes under solar radiation


      More Details Abstract Fulltext PDF

      In this study, an effort has been made to synthesize diatomite/silver phosphate (DT/AgP) composites and dye degradation test was carried out to evaluate the photocatalytic activity under solar light irradiation. Diatomite–silverphosphate composites with different DT/AgP ratios were prepared by precipitation of Ag$_3$PO$_4$ on diatomite that led to the formation of small Ag$_3$PO$_4$ particles on the diatomite surfaces. UV–visible diffuse reflectance analysis shows that DT/AgP composites can absorb visible wavelength, whereas TiO$_2$ catalyst only work under UV irradiance. Compared to pure AgP, the composite samples show higher specific surface area measured by Brunauer–Emmett–Teller analysis. Dye degradation test under solar light irradiation reveals that the photocatalytic reaction follows a pseudo-first-order rate law and the composite catalyst with DT/AgP ratio 1:0.8 shows better catalytic activity towards both rhodamine B and methyl orange degradation. As reference, a well-known commercial TiO$_2$ (Evonik-P25) was used in dye degradation test. It could be presumed that deposition of silver phosphate clusters (Ag$_3$PO$_4$, AgP) on diatom frustules (diatomite) provided anefficient photocatalyst activated by solar light irradiation.

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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