NH3-promoted heterogeneous reaction of SO2 to sulfate on α-Fe2O3 particles with coexistence of NO2 under different relative humidities

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)

“…The reaction chamber and other DRIFTS apparatus were similar to those used in a previous study. 24 First, about 50 mg α-Fe 2 O 3 nanoparticles was placed into a stainless steel cup (0.5 mm depth, 10 mm diameter) in the reaction chamber and compressed in order to form an integrated sample. Then the reaction chamber sample was pretreated in a stream of high-purity air of 300 mL min −1 to remove adsorbed water and impurities for about 30 minutes before the reactant gas was introduced.…”

“…The relative humidity (RH) has been highlighted in recent research on the atmospheric environment because it changes with different regions, seasons, and times of day. [23][24][25] The RH effects on the formation processes of aromatic SOA have been investigated in previous studies. 9,25 Due to the formation of hydroxy products from aqueous reactions, a high RH can lead to a much higher SOA yield from the photooxidation of toluene.…”

Interaction of Acrylic Acid and SO2 on the Surface of Mineral Dust Aerosol

“…17−19 Moreover, the study of He et al investigated the interaction between inorganic gases (NH 3 , NO 2 , and SO 2 ) on α-Fe 2 O 3 particles and demonstrated the synergistic effect of NH 3 and NO 2 on the formation of sulfate. 20 Another study investigated the influence of NO 2 and acetic acid on the heterogeneous reaction of SO 2 on α-Al 2 O 3 . 21 Considering the complexity of the atmospheric environment, it is of great importance to explore the interaction of different trace gases during heterogeneous reactions.…”

“…Eventually, they will sink to land or sea by the process of dry and wet deposition. , Many studies have been carried out to investigate the heterogeneous reactions of mineral dust aerosol, and their focus has shifted from the simple reactions of individual trace gases to more complex conditions in which multiple gases coexist. For example, interactions between inorganic gases, such as NO 2 + SO 2 and SO 2 + NH 3 on the surface of typical mineral oxides, have been studied. − Moreover, the study of He et al investigated the interaction between inorganic gases (NH 3 , NO 2 , and SO 2 ) on α-Fe 2 O 3 particles and demonstrated the synergistic effect of NH 3 and NO 2 on the formation of sulfate . Another study investigated the influence of NO 2 and acetic acid on the heterogeneous reaction of SO 2 on α-Al 2 O 3 .…”

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.…”