Journal of Photochemistry & Photobiology, A: Chemistry

The structural and photophysical properties of the catalysts have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) and UV–Vis diffuse reflectance spectrometry

The bactericidal activity of the prepared Ti/α-Fe2O3 and Ti/CQD@α-Fe2O3 samples against S. aureus and E. coli bacteria strains under dark and illumination conditions.

A novel fluorescent probe molecule, 2-(anthracen-9-yl)-1,3-dithiolane (AADT), is designed and synthesized for Hg2+ detection successfully, based on a good aggregation induced emission (AIE) fluorescent mechanism and a specific reaction type. DMF-H2O mixed solvent (Fw 80% V/V) is suitable to disperse AADT for forming 1×10-5 mol·L-1 solution with an AIE-active fluorescence probe system. With the increase of trace Hg (II), the AADT probe shows dual-channel, (turn-off at 429 nm, and turn–on at 511nm) fluorescence probe character. (R2>0.994), which does not interfere each other. The probe demonstrates excellent selectivity, anti-inference properties, and several metal ions and acid ions hardly affect its performance. The LOD of the AADT probe is lower than 2.34×10-8 mol·L-1.

Excel spreadsheet for calculating atrazine quantum yield

Supporting Information to the publication

Supporting Information

Supporting Information

TDDFT results

The supporting information of the article, including the NMR spectra and crystal data are provided.

The principles and application of heterogeneous photocatalytic processes have gained wide attention, especially to the effectiveness of the process. In this work, a mono and a multi-LED lamp are used to study the impact of the UV light intensity and distribution on the semiconductor surface during the degradation of organic compounds in water. A well-defined scan of the electromagnetic radiation profile on the surface of the membrane was obtained and evaluated. Comparing two lamp configurations with a total photon flux of 210 W.m-2 and using a filtration rate of 9.7 L.m-2.h-1, resulted in 20 % more degradation for the most homogeneous light distribution. Furthermore, the reaction rate relation to the photon flux was also studied, with a surface reaction model that includes possible mass transfer limitations. The surface reaction constant increased linearly with the irradiation intensity for the complete studied range [50 to 550 W.m-2] for the most homogeneous illumination distribution. A less uniform distribution resulted in a less than proportional reaction rate constant with respect to the incident photon flux between 100 and 210 W.m-2. This work adds valuable information to the photocatalysis field to improve the light efficiency in a photoreactor to enhance the degradation of pollutants.