Calcium incorporation in graphene oxide particles: A morphological, chemical, electrical, and thermal study

A Green Approach for the Synthesis of Coconut Husk Ash –Twisted Graphene Nanocomposites: Novel Catalysts for Solvent‐Free Biginelli Reaction

“…To examine the various functional groups in the synthesized catalytic systems, FTIR spectral analysis of all the prepared catalytic systems were performed (Figure ). From Figure (a), it can be seen that CHA is characterized by well‐defined bands at 3440 cm −1 , 1640 cm −1 , 1035 cm −1 and 470 cm −1 corresponding to symmetric ‐OH stretching, ‐OH bending, Si‐O−Si stretching and metal‐oxygen stretching vibrations respectively ,. The strong bands at 1470 cm −1 and 1416 cm −1 represent bands equivalent to basic carbonate peaks (asymmetric stretching of CO 3 2− group) that can be due to the absorption of atmospheric CO 2 by the basic components such as K 2 O, Na 2 O, CaO, MgO etc.…”

Revealing lattice disorder, oxygen incorporation and pore formation in laser induced two-photon oxidized graphene

“…There is a vast literature where different types of defects and microstructure features of crystalline solids are studied by analyzing X-ray or neutron diffraction-peak profiles [14,21,22].…”

“…As the most studied 2D material, graphene is a platform to unravel the science behind low dimensional materials. Therefore, many methods have already been used to modify graphene, including different strategies for tailoring its shape [5][6][7][8], defect control [9][10][11], chemical modification [12][13][14][15], besides many others. Recently, an all-optical method, namely, two-photon oxidation of graphene was demonstrated, which proved to have some advantages as compared to other oxidation methods, including direct writing of device features with sub-micrometer resolution, high speed and controlled level of oxidation [16][17][18][19].…”

Long-term persistence of soil organic matter in Amazonian Dark Earth

“…These findings are in agreement with our hypothesis that a high Ca input in ADE likely contributed to the overall larger SOM content in these soils, most likely via Ca bridging (Baldock and Skjemstad, 2000;Muneer and Oades, 1989). Recent studies also suggested that incorporation of Ca into BC structures may occur Castro et al, 2016). Combined, these findings point to a synergistic effect between Ca and BC in ADE.…”