Karthikeyan Sekar 교수

A family of titania derived nanocomposites synthesized via sol-gel and hydrothermal routes exhibit excellent performance for the photocatalytic degradation of two important exemplar water pollutants, oxytetracycline and Congo Red. Low loadings of Co 3 O 4 nanoparticles dispersed over the surfaces of anatase TiO 2 confer visible light photoactivity for the aqueous phase decomposition of organics through the resulting heterojunction and reduced band gap. Subsequent modification of these Co 3 O 4 /

CuFe/SBA-15 catalyzed DPD mineralization. • Synthesis and characterisation of a bimetallic CuFe/SBA-15 catalyst are described. • Mesoporous silica stabilises highly dispersed CuO and Fe 2 O 3 nanoparticles. • Supported oxide nanoparticles are an excellent catalyst for water depollution. A bimetallic oxidation catalyst has been synthesized via wet impregnation of copper and iron over a mesoporous SBA-15 silica support. Physicochemical properties of the resulting material were characterized by XRD

Copper oxide supported on nanoporous activated carbon (CuO-NPAC) is reported for the aqueous phase catalytic degradation of cyanotoxin microcystin-LR (MC-LR).

Hierarchical Cu2O/RGO nanocomposites were synthesized via a sustainable photoredox strategy and utilized as bifunctional electrocatalysts for oxygen and hydrogen evolution reactions (OER and HER) under alkaline conditions. The photoredox Cu2O/RGO electrocatalyst has potential for bifunctional electrocatalytic applications, owing to their small overpotentials (OER: 215 mV and HER: 142 mV), fast kinetics, Tafel slope of 58.2 mV dec–1, high mass performance (613.49 A g–1), high exchange current den

In this review, we mainly summarize the important progress in the development of organic–inorganic hybrid photocatalysts for the production of hydrogen using biomass and its derivatives. Recent progresses and challenges are also discussed.

Solar photocatalytic processes are a promising approach to environmental remediation, however their implementation requires improvements in visible light harvesting and conversion and a focus on low cost, Earth abundant materials.

Abstract Well‐defined Cu 2 O nanocubes with tunable dimensions and physicochemical properties have been prepared using a simple one‐pot reaction. Reduction of Cu(II) salts by ascorbic acid in the presence of PEG as a structure‐directing agent affords crystalline Cu 2 O nanocubes of between 50 to 500 nm. Optical band gap, band energies, charge‐carrier lifetimes and surface oxidation state systematically evolve with nanocube size, and correlate well with visible light photocatalytic activity for a

The persistent organic pollutants and bio diversities (pathogenic and non-pathogenic) present in treated municipal wastewater cause environmental deterioration besides adversely affecting human health. In the present investigation, an attempt was made to treat the municipal wastewater using iron impregnated polyacrylamide (IIPA) powder catalyst in a fluidized reactor. The IIPA catalyst was characterized by carbon, 12.23%, hydrogen, 1.63%, nitrogen, 2.93%, iron, 58%, silicon, 15.25%, surface area