The effects of NO2 and SO2 on the atmospheric heterogeneous reaction of acetic acid on α-Al2O3 in the presence and absence of simulated irradiation were investigated at ambient conditions by using the diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) technique. The experiment was divided into two parts: the heterogeneous reaction experiment and the pre-adsorption reaction experiment under light and dark conditions. In the heterogeneous reaction experiment, solar radiation stimulates the formation of more acetate and nitrate. At the same time, it can promote the partial conversion of sulfites to sulfates in the heterogeneous reaction of SO2 on α-Al2O3 particles. It can be seen that solar radiation plays a significant role in the heterogeneous reactions of inorganic and organic gases on mineral particles. In the pre-adsorption reaction experiment, the pre-adsorbed nitrate, sulfite or sulfate have conspicuous inhibition influence on the formation of acetate in the presence and absence of simulated irradiation. This indicates that the role of pre-adsorbed species should be given more attention for the heterogeneous reaction of acetic acid on the surface of α-Al2O3 particles. When α-Al2O3 particles were pre-adsorbed by different species, simulated irradiation could facilitate the growth of different amounts of acetate. It was found that the extent to which solar radiation contributes to heterogeneous reactions of different kinds of gases on different mineral particles is different. This further emphasizes the complexities of the heterogeneous conversion processes of atmospheric trace gases on the surface of mineral aerosols, promoting a better understanding of the effects of solar radiation and pre-adsorption on the heterogeneous reaction in the atmosphere.

中文翻译：

---

在有无模拟辐照下，NO2和SO2对乙酸在α-Al2O3上的异相反应的影响。

利用漫反射红外傅里叶变换光谱技术（DRIFTS），在环境条件下研究了NO2和SO2对乙酸在α-Al2O3上大气非均相反应的影响。实验分为两部分：在明暗条件下的非均相反应实验和预吸附反应实验。在异质反应实验中，太阳辐射会刺激更多乙酸盐和硝酸盐的形成。同时，它可以促进亚硫酸盐在α-Al2O3颗粒上的异相反应中亚硫酸盐向硫酸盐的部分转化。可以看出，太阳辐射在无机和有机气体在矿物颗粒上的异质反应中起着重要作用。在预吸附反应实验中，无论是否存在模拟辐射，预吸附的硝酸盐，亚硫酸盐或硫酸盐对乙酸盐的形成都有明显的抑制作用。这表明，对于α-Al2O3颗粒表面乙酸的非均相反应，应更加关注预吸附物质的作用。当α-Al2O3颗粒被不同物种预吸附时，模拟辐射可以促进不同量乙酸盐的生长。已经发现，太阳辐射对不同种类的气体在不同矿物颗粒上的异质反应做出贡献的程度是不同的。这进一步强调了矿物气溶胶表面上大气痕量气体异质转化过程的复杂性，