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Full-Text Articles in Engineering

Colloidal Plasmonic Titanium Nitride Nanoparticles: Properties And Applications, Urcan Guler, Sergey Suslov, Alexander V. Kildishev, Alexandra Boltasseva, Vladimir M. Shalaev Dec 2014

Colloidal Plasmonic Titanium Nitride Nanoparticles: Properties And Applications, Urcan Guler, Sergey Suslov, Alexander V. Kildishev, Alexandra Boltasseva, Vladimir M. Shalaev

U. Guler

Optical properties of colloidal plasmonic titanium nitride nanoparticles are examined with an eye on their photothermal and photocatalytic applications via transmission electron microscopy and optical transmittance measurements. Single crystal titanium nitride cubic nanoparticles with an average size of 50 nm, which was found to be the optimum size for cellular uptake with gold nanoparticles [1], exhibit plasmon resonance in the biological transparency window and demonstrate a high absorption efficiency. A self-passivating native oxide at the surface of the nanoparticles provides an additional degree of freedom for surface functionalization. The titanium oxide shell surrounding the plasmonic core can create new opportunities …


Biogenic Synthesis, Photocatalytic, And Photoelectrochemical Performance Of Ag–Zno Nanocomposite, S. A. Ansari, Mohammad Mansoob Khan Dr, M. O. Ansari, J. Lee, M. H. Cho Dec 2013

Biogenic Synthesis, Photocatalytic, And Photoelectrochemical Performance Of Ag–Zno Nanocomposite, S. A. Ansari, Mohammad Mansoob Khan Dr, M. O. Ansari, J. Lee, M. H. Cho

Dr. Mohammad Mansoob Khan

The development of coupled photoactive materials (metal/semiconductor) has resulted in significant advancements in heterogeneous visible light photocatalysis. This work reports the novel biogenic synthesis of visible light active Ag–ZnO nanocomposite for photocatalysis and photoelectrode using an electrochemically active biofilm (EAB). The results showed that the EAB functioned as a biogenic reducing tool for the reduction of Ag+, thereby eliminating the need for conventional reducing agents. The as-prepared Ag–ZnO nanocomposite was characterized by X-ray diffraction, transmission electron microscopy, diffuse reflectance spectroscopy, photoluminescence spectroscopy, and X-ray photoelectron spectroscopy. The photocatalytic experiments showed that the Ag–ZnO nanocomposite possessed excellent visible light photocatalytic activity …


Photocatalytic Degradation Of Phenolic Compounds In Water: Irradiation And Kinetic Modeling, Jesus Moreira Del Rio Jan 2012

Photocatalytic Degradation Of Phenolic Compounds In Water: Irradiation And Kinetic Modeling, Jesus Moreira Del Rio

Jesus Moreira del Rio

Scaling up a photoreactor requires both knowledge of optical properties of the slurry medium and an established kinetic model. Measuring the scattering and absorption coefficients of particles suspended in water involves the use of specialized optical equipment, as well as the partial solution of the radiative transfer equation (RTE). In addition, modeling of the radiation field in photoreactors with complicated geometries offers special challenges. On the other hand, most of the kinetic models (KM) for phenol photodegradation reported in the literature were obtained for a single organic chemical species only. In fact, neglecting all the intermediate species generated during the …


Kinetic Modeling And Parameter Estimation For The Photocatalytic Oxidation Of Phenol In Water, Jesus Moreira Del Rio, Benito Serrano Rosales, Hugo De Lasa Oct 2011

Kinetic Modeling And Parameter Estimation For The Photocatalytic Oxidation Of Phenol In Water, Jesus Moreira Del Rio, Benito Serrano Rosales, Hugo De Lasa

Jesus Moreira del Rio

No abstract provided.


Evaluation Of Uv Absorption Parameters In An Aqueous Photocatalytic Slurry Reactor Using Monte Carlo Simulations And Macroscopic Balances, Jesus Moreira Del Rio, Benito Serrano Rosales, Aaron Ortiz Gomez, Hugo De Lasa May 2011

Evaluation Of Uv Absorption Parameters In An Aqueous Photocatalytic Slurry Reactor Using Monte Carlo Simulations And Macroscopic Balances, Jesus Moreira Del Rio, Benito Serrano Rosales, Aaron Ortiz Gomez, Hugo De Lasa

Jesus Moreira del Rio

No abstract provided.


Evaluation Of Photon Absorption Parameters In An Aqueous Photocatalytic Slurry Reactor Using Monte Carlo Simulations And Macroscopic Balances, Jesus Moreira Del Rio, Benito Serrano Rosales, Hugo De Lasa Jun 2010

Evaluation Of Photon Absorption Parameters In An Aqueous Photocatalytic Slurry Reactor Using Monte Carlo Simulations And Macroscopic Balances, Jesus Moreira Del Rio, Benito Serrano Rosales, Hugo De Lasa

Jesus Moreira del Rio

No abstract provided.