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"Characteristic Spectral Features of Terra Preta (TP) in the 5–15 Terah" by Lucia M. Lepodise, Roger A. Lewis et al.

Terra preta is a fertile anthropogenic soil found in the Amazon basin. One of the most significant differences between the terra preta and surrounding soils is that terra preta is rich in aromatic carbons. Previous infrared investigations of terra preta were reported at energies above 1000 cm−1 where many other forms of carbon also have absorption lines. No measurements have been reported below 800 cm−1, where many absorptions associated with aromatic carbons occur in the absence of aliphatic carbon lines. We employ Fourier transform infrared spectroscopy between 150 cm−1 and 500 cm−1. A comparison was made between the spectra of terra preta, several pure aromatic compounds, organic fertilizers developed to replicate terra preta and several Australian soils, some of which containing char from bushfires. The spectra in the 150–500 cm−1 range were very similar between terra preta and the organic fertilizers, while they were very different for the natural soils. These findings ....

Aromatic Compounds , Density Functional Theory , Fourier Transform Infrared , Bit Ir , Terra Preta ,

Breaking down how "single-atom" catalysts help remove organic pollutants

Researchers from Tokyo Metropolitan University have discovered key clues behind the workings of “single-atom” catalysts based on iron-pyridine sites in a carbon matrix. They firstly developed a ne . ....

Shiro Kubuki , Tokyo Metropolitan University , Associate Professor Shiro Kubuki , Density Functional Theory , Single Atom Catalysts ,

Breaking down how "single-atom" catalysts help remove organic pollutants

Breaking down how "single-atom" catalysts help remove organic pollutants
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Shiro Kubuki , Tokyo Human Resources Fund For City Diplomacy , Tokyo Metropolitan University , Associate Professor Shiro Kubuki , Density Functional Theory , Tokyo Human Resources Fund , City Diplomacy ,

"Total Electron Detachment and Induced Cationic Fragmentation Cross Sec" by Carlos Guerra, Sarvesh Kumar et al.

In this study, novel experimental total electron detachment cross sections for O2− collisions with benzene molecules are reported for the impact energy range (10–1000 eV), as measured with a transmission beam apparatus. By analysing the positively charged species produced during the collision events, relative total ionisation cross sections were derived in the incident energy range of 160–900 eV. Relative partial ionisation cross sections for fragments with m/z ≤ 78 u were also given in this energy range. We also confirmed that heavier compounds (m/z > 78 u) formed for impact energies between 550 and 800 eV. In order to further our knowledge about the collision dynamics governing the fragmentation of such heavier molecular compounds, we performed molecular dynamics calculations within the framework of the Density Functional Theory (DFT). These results demonstrated that the fragmentation of these heavier compounds strongly supports the experimental evidence of m/z = 39–42, ....

Density Functional Theory , Anion Molecule Collisions , Lectron Detachment Cross Sections , Molecular Dynamics , Ositive Ion Induced Fragmentation ,

Researchers use 'disorder inorganic nanocrystals' to set new ultrathin solar cell record

Team from ICFO, UCL, and Imperial (London) say that AgBiS2 nanocrystals are emerging as “star players” for low-cost PV. ....

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