Application of smog chambers in atmospheric process studies

Chu, Biwu; Chen, Tianzeng; Ma, Qingxin; Mu, Yujing; Wang, Yonghong; Ma, Jinzhu; Zhang, Peng; Liu, Jun; Liu, Chunshan; Gui, Huaqiao; Hu, Renzhi; Hu, Bo; Wang, Xinming; Wang, Yuesi; Liu, Jianguo; Xie, Pinhua; Chen, Jianmin; Liu, Qian; Jiang, Jingkun; Li, Junhua; He, Kebin; Liu, Wenqing; Jiang, Guibin; Hao, Jiming; He, Hong

doi:10.1093/nsr/nwab103

Cited by 28 publications

(12 citation statements)

References 115 publications

(141 reference statements)

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“…These results indicated that there may be other sources of hydroxyl radicals in the smog chamber. For example, the heterogeneous generation of HONO on the chamber wall, which was recognized as an important source of hydroxyl radicals in the chamber, 46 may trigger the oxidation of SO 2 to gaseous H 2 SO 4 and then lead to NPF. However, in the presence of TiO 2 (Figure 2b), the particle number concentration and GMD increased to 6.43 × 10 4 cm −3 and 30 nm, respectively.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Titanium Dioxide Promotes New Particle Formation: A Smog Chamber Study

Zhang

Chu

Liu

et al. 2023

Environ. Sci. Technol.

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TiO2 is a widely used material in building coatings. Many studies have revealed that TiO2 promotes the heterogeneous oxidation of SO2 and the subsequent sulfate formation. However, whether and how much TiO2 contributes to the gaseous H2SO4 and subsequent new particle formation (NPF) still remains unclear. Herein, we used a 1 m3 quartz smog chamber to investigate NPF in the presence of TiO2. The experimental results indicated that TiO2 could greatly promote NPF. The increases in particle formation rate (J) and growth rate due to the presence of TiO2 were quantified, and the promotion effect was attributed to the production of gaseous H2SO4. The promotion effect of TiO2 on SO2 oxidation and subsequent NPF decreased gradually due to the formation of surface sulfate but did not disappear completely, instead partly recovering after washing with water. Moreover, the promotion effect of TiO2 on NPF was observed regardless of differences in RH, and the most significant promotion effect of TiO2 associated with the strongest NPF occurred at an RH of 20%. Based on the experimental evidence, the environmental impact of TiO2 on gaseous H2SO4 and particle pollution in urban areas was estimated.

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Section: ■ Materials and Methodsmentioning

confidence: 99%

Titanium Dioxide Promotes New Particle Formation: A Smog Chamber Study

Zhang

Chu

Liu

et al. 2023

Environ. Sci. Technol.

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“…The close contact of stacked samples brings substantial uncertainty to the experiment. Therefore, smog chamber [77][78][79] and individual particle analysis methods [80][81][82][83][84] have become popular in atmospheric heterogeneous reaction research in recent years. Smog chamber and individual particle analysis methods utilize non-contacting or suspended particles, which can truly reflect the heterogeneous reaction process on the surface of particles in the actual atmospheric environment, to obtain accurate kinetic parameters that reflect the real-life conditions of the atmosphere.…”

Section: Surface Heterogeneous Reactions Of Ampmmentioning

confidence: 99%

Research Progress on Heterogeneous Reactions of Pollutant Gases on the Surface of Atmospheric Mineral Particulate Matter in China

et al. 2022

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Haze is the phenomenon of visibility degradation caused by extinction effects related to the physicochemical properties of atmospheric particulate matter (APM). Atmosphere heterogeneous reactions can alter the physicochemical properties of APM. Therefore, it is important to understand the atmospheric heterogeneous reactions of APM in order to reveal the cause of haze. Herein, the current situation, developmental trend, source, and composition of APM pollution in China are reviewed. Additionally, we introduce the reaction characteristics and key chemical processes of common inorganic, organic, and mixed pollutant gases on the surface of mineral particles. The effects of mineral particulate matter on aggregation, regulation, and catalysis in the formation of atmospheric aerosols and the synergistic reaction mechanism of SO2, NO2, O3, and VOCs on the surfaces of different mineral particles are summarized. The problems existing in the current research on heterogeneous reactions on the surfaces of mineral particles are also evaluated. This paper aims to gain a deep understanding of the mechanism of mineral particulate matter promoting the formation of secondary aerosols and attempts to provide theoretical support for effective haze control.

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“…[16][17][18][19] What is more, NO 3 − is a severe N-containing water pollutant due to the use of nitrogenous fertilizer, discharge of industrial wastewater, and combustion of fossil fuel, which poses a great threat to natural environment. [20][21][22] In this regard, NO 3 RR process would also contribute to environmental protection.…”

Section: Introductionmentioning

confidence: 99%

Optimizing Intermediate Adsorption via Heteroatom Ensemble Effect over RuFe Bimetallic Alloy for Enhanced Nitrate Electroreduction to Ammonia

Zhao

Jiang

Wang

et al. 2023

Advanced Energy Materials

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The electrochemical nitrate reduction reaction (NO3RR) is a promising approach for nitrate removal and NH3 synthesis at ambient conditions. As a complex eight‐electron/nine‐proton transfer process, its performance relies heavily on the adsorption ability of reaction intermediates on the catalyst surface, which is determined by the geometric and electronic configurations of active sites. In this work, a heteroatom ensemble effect is deliberately triggered over RuFe bimetallic alloy to optimize intermediate adsorption for NO3RR. A record‐high NH3 yield rate of 118.8 mg h−1 mg−1 and a high Faradaic efficiency of 92.2% are achieved at −1.4 V vs reversible hydrogen electrode, ranking at the top of the state‐of‐the‐art. Experimental and computational results reveal that the geometric and electronic characteristics of the induced heteroatom ensemble effect play crucial roles. Both Ru and Fe display a continuous state throughout the Fermi level, suggesting high electron density benefits the whole NO3RR. As a result, facilitated adsorption of NO3−, efficient stabilization of key intermediates, as well as the timely desorption of NH3 are simultaneously achieved, thus significantly promoting the direct reduction of NO3− to NH3.

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Application of smog chambers in atmospheric process studies

Cited by 28 publications

References 115 publications

Titanium Dioxide Promotes New Particle Formation: A Smog Chamber Study

Titanium Dioxide Promotes New Particle Formation: A Smog Chamber Study

Research Progress on Heterogeneous Reactions of Pollutant Gases on the Surface of Atmospheric Mineral Particulate Matter in China

Optimizing Intermediate Adsorption via Heteroatom Ensemble Effect over RuFe Bimetallic Alloy for Enhanced Nitrate Electroreduction to Ammonia

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