Fig. 2
From: Rational design of photocatalysts for ammonia production from water and nitrogen gas
a Spectrum and b standard curve of UV–Vis spectrophotometer with standard solutions from 0.5 to 5.0 µg·mL-1 in 0.05 M H2SO4. Reproduced with permission [25]. Copyright 2019, PNAS. c, d Interference impact on measurements of produced NH3 in solution with CH3OH, HCOOH and HCHO. Reproduced with permission [26]. Copyright 2019, Wiley–VCH. e 1H-NMR spectrums of 14NH4+(red) and 15NH4+(black), respectively. Reproduced with permission [27]. Copyright 2021, The Royal Society of Chemistry. f The peaks for 14NH4+ corresponding to its concentration. Reproduced with permission [8]. Copyright 2020, American Chemical Society