Real-Time UV/VIS Spectroscopy to Observe Photocatalytic Degradation

What will it take to observe processes in 'real time'?

Attosecond science is still in its infancy, yet impressive results and discoveries are already emerging1. Experiments have provided information about electron ejection from orbitals with timescales that differ by as little as tens of attoseconds, allowing valence-electron wave packets to be characterized. Scientists are now able to manipulate and steer electrons using laser fields, allowing the...

Photocatalytic Degradation of Dyes

Photocatalytic Degradation of Acetaminophen

The photocatalytic degradation of a common analgesic (acetaminophen) with titanium dioxide irradiated with low energy ultraviolet light (365 nm) was studied in order to determine the effect of several parameters such as catalyst’s weight, photochemical effect, and initial concentration. The results indicate that acetaminophen is degraded in the order of 4% by the photochemical effect. The prese...

The use of synchrotron X-rays to observe copper corrosion in real time.

We have developed and tested two complementary methods for making time-lapse synchrotron X-ray diffraction (XRD) measurements of the growth of synthetic corrosion layers using a protocol for producing copper(I) chloride (nantokite), on copper as a test. In the first method, a copper coupon was spin-coated with saturated copper(II) chloride solution in air while the surface was characterized in ...

The styrene photocatalytic degradation reaction

In this study the aqueous styrene photocatalytic degradation reaction was evaluated using TiO 2 P-25 (Degussa) as catalyst. The experiments were accomplished in a batch reactor, with temperature control and catalyst in suspension. The radiation source was a 28 W UV lamp. Determinations of styrene concentrations were done by gas chromatography with a flame ionization detector (FID). Preliminary ...