Polymeric carbon nitride with frustrated Lewis pair sites for enhanced photofixation of nitrogen

Abstract

<p>The combination of frustrated Lewis pair sites and the MoO₂ cocatalyst on C₃N₄ can facilitate N₂ activation for enhanced photocatalytic N₂ fixation activity.</p>

Understanding spontaneous dissolution of crystalline layered carbon nitride for tuneable photoluminescent solutions and glasses

“…These more limited measurements were performed in lieu of full mappings to accelerate the measurement time (to 10 s) thus avoiding condensation ice build-up and limiting heating of the samples during the experiments. 7 Li, 35 Cl and 79 Br NMR spectra of samples dissolved in DMSO-d 6 were recorded using a Bruker AV III 400 spectrometer equipped with a broadband multinuclear probe at 298 K. Lithium and halide NMR measurements were performed on the same samples. 7 Li and 35 Cl chemical shifts are measured relative to 7 Li and 35 ICP-MS was performed on a Varian 720 ICP-AES.…”

“…7 Li, 35 Cl and 79 Br NMR spectra of samples dissolved in DMSO-d 6 were recorded using a Bruker AV III 400 spectrometer equipped with a broadband multinuclear probe at 298 K. Lithium and halide NMR measurements were performed on the same samples. 7 Li and 35 Cl chemical shifts are measured relative to 7 Li and 35 ICP-MS was performed on a Varian 720 ICP-AES. Solutions were diluted 100× and 1000× into 1 M nitric acid for Br and Li measurements respectively.…”

“…Blank 1 M nitric acid was run three times between each calibration measurement, and once between each sample. 7 Li and 81 Br values were used for quantification, with 6 Li and 79 Br values also measured and provided in the SI.…”

“…1,2 Key properties related to energy and sustainability applications include tuneable wide bandgaps ranging between 2.2 -2.8 eV that can be harnessed for solar energy capture and photocatalysis. [3][4][5] Their various nitrogen-centres have Lewis and Brønsted acid-base properties leading to catalysis, 6,7 and they are shown to provide effective supports for metal and metal oxide nanoparticle catalysts in fuel cells and electrolyzers. 8,9 Many carbon nitride materials are synthesised via thermolysis of nitrogen-rich carbonaceous precursors, forming amorphous to nanocrystalline polymer products, incorporating varying amounts of H and O in their structure.…”

Microcystis@TiO2 Nanoparticles for Photocatalytic Reduction Reactions: Nitrogen Fixation and Hydrogen Evolution

“…Solar-driven photocatalysis, which is economical, sustainable, and environmentally friendly, has captured extensive attention [14][15][16][17][18]. Photocatalytic reduction reactions (such as hydrogen evolution, nitrogen fixation, and carbon dioxide reduction) can often store the solar energy into chemical energy [19][20][21][22][23][24][25]. As one of the most widely studied photosensitive materials, Titanium dioxide (TiO 2 ) is of great concern in the research of photocatalysis [26][27][28][29][30][31][32][33][34].…”