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Abstract This year, mesoporous carbon nitride has sparked a lot of curiosity for its potential uses in organocatalysis, photo- and electrochemistry, and CO 2 capture. Through a simple UV light oxidation technique, we show that acidic carboxyl groups can be smoothly introduced onto the surface of well-ordered MCN without annihilation between the two acid groups and the MCN's basic groups. The findings reveal a general method to synthete multifunctional nanomaterials and open new avenues for the design of a high-performance catalyst for green organic synthesis.
Source link: https://doi.org/10.1038/srep12901
We present a first-principles density functional theory analysis of H 2 O molecular adsorption on the tri-triazine-based structure as an initial step toward knowing the mechanisms behind photocatalysis in graphitic carbon nitride. According to preliminary density of states and charge density distribution studies, the bonding occurs between the hydrogen atom of the water molecule and the two-coordinated nitrogen atom of g-C 3 N 4.
Source link: https://doi.org/10.1143/jjap.49.115703
The deposition of hydrogenated amorphous carbon nitride films was carried out by Pulsed supermagnetron plasma. 12. 5 percentu2013100% was selected from a large variety of duty ratios for the pulsed rf power range. As the pulsed plasma-discharge time decreased, the wafer temperature increased with a decrease in duty ratio. With an increase in duty ratio, the optical band gap narrowed slightly. With an increase in LORF, the optical band gap reduced dramatically with a service ratio of 12. 5%.
Source link: https://doi.org/10.1143/jjap.49.08jf07
The current investigation into the manufacture of silicon carbon nitride dielectric films exposed to ultraviolet light at room temperature has been conducted. After the exposure of SiCN single-layer and SiCN2 double-layer films to 4. 9-eV UV light, leakage currents in both films have risen strongly under positive and negative gate biases.
Source link: https://doi.org/10.1143/jjap.49.05fe02
Boron carbon nitride with a methyl group is a desirable material as a low-dielectric-constant interlayer for next-generation LSI interconnections. We have obtained an effective reduction of fluorine diffusion into the methyl-BCN film and a decrease in the amount of fluorocarbon polymer, while still retaining good etching rates on the methyl-BCN film thanks to low-temperature etching rates.
Source link: https://doi.org/10.1143/jjap.49.04db10
This C 3 N 2's crystal structure and atomic positions were determined by Rietveld's analysis of the X-ray diffraction pattern determined using synchrotron radiation. a = 7. 625 u00c5, b = 4. 490 pp5 and c = 4. 047 u00c5, with lattice constants C m c 2 1 being an orthorhombic unit cell of the space group C m c 2 1 with lattice constants a = 4. 047 u00c5, and c = 4. 047 u00c5. If the CH 2 atomic unit is replaced with the CN 2 atomic unit and bonding is rearranged, the C 2 N 2 becomes the long-awaited superhard C 3 N 4.
Source link: https://doi.org/10.1143/jjap.50.095503
Here, we investigated the possibility of conductive graphite nanosheets as sorbent materials for electrocatalytically switchable CO 2 capture. We found that the adsorption energy of CO 2 molecules on g-C 4 N 3 nanosheets can be dramatically improved by injecting extra electrons into the adsorbent, according to first-principle calculations. The negatively charged g-C 4 N 3 nanosheets achieve CO 2 capture capacities up to 73. 9 percent at saturation CO 2 capture coverage, which amounts to 42,122, or 42. 3 wt%. Switching on/off the charging voltage enables these reactions to happen spontaneously without any energy barriers as long as additional electrons are introduced or removed, and these reactions can be simply controlled and reversed as opposed to other CO 2 capture technologies. These studies may be helpful in the quest for a new class of experimentally viable high-capacity CO 2 capture materials with desirable thermodynamics and reversibility.
Source link: https://doi.org/10.1038/srep17636
InGaN crystals were grown on carbon nanotubes using metalorganic chemical vapor deposition. The observed green cathodoluminescence emission was consistent with the surface image of the NS-InGaN crystallites, demonstrating excellent optical stability of the InGaN NSs on CNTs. Based on these findings, InGaN NSs grown on CNTs could be able to help solve the LED technology's green gap.
Source link: https://doi.org/10.1038/srep16612
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