Heterogeneous reaction of toluene/NO₂/O₃ on α-Fe₂O₃ nanoparticles: the impacts of O₃, light illumination, and relative humidity on the formation of N-containing organic compounds (NOC)

Abstract

Despite the heterogeneous reaction of toluene significantly affects the atmospheric environment, less attention has been paid to the effects of O3, light illumination and relative humidity on the formation of...

Nitrate formation and iron dissolution in the heterogeneous reactions of NH3 on nano α-Fe2O3

“…In some previous studies, this characteristic peak was also attributed to NO 3 − or HNO 3 . 19,47–49 In addition, IC was used to quantify NO 3 − . In IC determination, we also observed the formation of NO 3 − , and the results are shown in Fig.…”

“…In some previous studies, this characteristic peak was also attributed to NO 3 − or HNO 3 . 19,[47][48][49] In addition, IC was used to quantify (from 1.58 mg L −1 to 3.03 mg L −1 ). In the presence of SO 2 , there is formation of NO 3 − (1.50 mg L −1 ) in the dark reaction, demonstrating the oxidation of NH 3 .…”

The heterogeneous reactions of toluene/O3/NH3 on hematite nanoparticles: the impact of light illumination on organic ammonium salt formation

“…10,16 Furthermore, its derived intermediates can, via reaction with NO x and/or NH 3 , lead to the formation of brown carbon. 10,15,17 As the most abundant basic gas existing in the atmosphere, NH 3 is mainly derived from agricultural nitrogen fertilizer use and animal husbandry emission with a global land emission of 70-92 Tg a −1 . 18,19 Due to the large emission from agriculture and animal husbandry in China, the maximum concentration of NH 3 exceeds 100 ppbv in the North China Plain.…”

Atmospheric fates of SO2 at the gas–solid interface of iron oxyhydroxide (FeOOH) minerals: effects of crystal structure, oxalate coating and light irradiance

“…2 Previous studies showed the important role of Fe 2 O 3 and Fe 3 O 4 in SO 2 conversion, but few of them examined the contributions of the more abundant FeOOH. 2,[16][17][18][19][20] Previous studies suggested that FeOOH widely exists in atmospheric particulate matter, especially mineral dusts. [21][22][23][24] In addition, the abundance of FeOOH is comparable to or even higher than that of hematite.…”

“…Irradiated Fe-containing dust may present higher heterogeneous reactivity toward atmospheric trace gases due to the photocatalytic effect of the transition metal oxides therein or the photochemical effects induced by the specific dust coatings. 4,18 However, the relevant studies concerned the photocatalytic and/or photochemical impacts of the irradiated particles rather than the irradiation intensity dependence of a series of reactions. The intensity of sunlight irradiation should be emphasized by laboratory stimulations because it changes with longitude, latitude, altitude, season, and time of day.…”