Improving the photocatalytic efficiency of a fully noble-metal-free system for CO2 reduction remains fundamental challenge, which can be accomplished by facilitating electron delivery as consequence exploiting intermolecular interactions. Herein, we have designed two Cu(I) photosensitizers with different pyridyl pendants at phenanthroline moiety to enable dynamic coordinative interactions betwe...

Using van der Waals-corrected density functional theory and a local chemical bond analysis, we study and explain trends in the binding between CO2 and open-metal coordination sites within a series of two metal-organic frameworks (MOFs), BTT, and MOF-74 for Ca, Mg, and nine divalent transition-metal cations. We find that Ti and V result in the largest CO2 binding energies and show that for these...

The anatomical and chemical characteristics of sweetgum were studied after 11 years of elevated CO2 (544 ppm, ambient at 391 ppm) exposure. Anatomically, branch xylem cells were larger for elevated CO2 trees, and the cell wall thickness was thinner. Chemically, elevated CO2 exposure did not impact the structural components of the stem wood, but non-structural components were significantly affec...

The elimination of impurities from natural gas (water, CO2, H2S, mercaptans) is an obligation: in Europe, a max. 20 mg/Sm3 total sulfur (at 15°C and 1 atm) allowed, as well 2.5 vol% CO2. It maximizes the calorific value delivered limits chemical risks (corrosion, toxicity) associated with this transition fuel to cleaner energy sources. Acid separation commonly performed by reactive gas-liquid a...

Three kinds of inorganic alkali are introduced into tetraethylenepentamine (TEPA)and polyethyleneimine (PEI)-modified MCM-41 as the CO2 adsorbents. FT-IR and TGA are used to characterize the surface groups and the thermal stability of adsorbents. Chemical titration method is used to measure the alkali amounts of adsorbents. Thermo-gravimetric analysis with 10% CO2/90% N2 as the simulated flue g...

We present airborne measurements of a novel eye-safe spectrally broadband LIDAR capable of dealing with the atmospherically-induccd variations in CO2 absorption using a Fabry-Perot based detector. The Fabry-Perot solid etalon in the receiver part is tuned to match the wavelength of several CO2 absorption lines simultaneously. The broadband technique tremendously reduces the requirement for sour...

Ionic liquids (ILs) have recently been introduced as green solvents and potential substitute to volatile organic compounds. This is due to their negligible vapour pressure, high thermal stability, and large liquid phase range. Moreover, their physical and chemical properties can be tuned accordingly by proper choice of cations and anions. Thus, researchers suggest replacing conventional amine b...

Efficient heat transfer of concentrated solar energy and rapid chemical kinetics are desired characteristics of solar thermochemical redox cycles for splitting CO2. We have fabricated reticulated porous ceramic (foam-type) structures made of ceria with dual-scale porosity in the millimeter and micrometer ranges. The larger void size range, with dmean = 2.5 mm and porosity = 0.76-0.82, enables v...