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The heat desorption of styrene from adsorbents is impracticable owing to its spontaneous polymerization under heating conditions. However, the feature also brings a potential promoting effect on styrene adsorption. Therefore, it is expected to develop the non-regenerative adsorbents with large adsorption capacity by strengthening the polymerization effect. In this work, C-Cl grafted silica gel adsorbents were prepared by introducing (Chloromethyl)dimethylchlorosilane (CMDMCS) and FeCl 2 into silica gel. The C-Cl grafted silica gel exhibited excellent styrene adsorption performance, its adsorption amounts for styrene were 4.67 times and 9 times of unmodified silica gel under dry air condition and high humidity condition (RH = 80%), respectively. In addition, the adsorption of styrene on C-Cl grafted silica gel was almost unaffected by the presence of toluene. The characterization of adsorbents after styrene adsorption indicated that the improvement of adsorption capacity of C-Cl grafted silica gel for styrene can be attributed to atom transfer radical polymerization (ATRP) of styrene molecules on modified silica gel during adsorption process., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier Ltd. All rights reserved.)

A series of MnFe catalysts were prepared by hydrothermal synthesis combined with heat treatment at different temperatures. The characterizations demonstrated that MnFe-120 with both surface -OH and -NO 3 , MnFe-175 with surface -OH, MnFe-300 containing neither surface -OH nor -NO 3 , and MnFe-300-NO 3 containing surface -NO 3 were gained by drying or calcination and impregnation. The activity evaluation showed that the order of catalytic activity was MnFe-120 > MnFe-175 > MnFe-300-NO 3 > MnFe-300. Further, characterizations and experiment results revealed that O 3 adsorbed on the surface of the catalyst can interact with surface -OH and generated hydroxyl radicals (·OH). The presence of surface -NO 3 provided more Lewis acid sites, thereby promoting H 2 O adsorption and conversion to the surface -OH, which supplemented the surface -OH consumed by the interaction with O 3. It was deduced that the coexistence of surface -OH and -NO 3 improved the production of·OH, which synergistically promoted the catalytic ozonation of toluene. [Display omitted] • A series of MnFe catalysts with different amounts of surface -OH and -NO 3 were prepared. • MnFe catalyst containing both surface -OH and -NO 3 had a optimal catalytic ozonation performance for toluene. • O 3 adsorbed on the surface -OH sites and hydroxyl radicals (·OH) to oxidize toluene was produced. • H 2 O adsorbed on the surface -NO 3 sites and was converted to the surface -OH, which supplemented the surface -OH consumed. • The synergistic effect of surface -OH and -NO 3 increased the amount of·OH production. [ABSTRACT FROM AUTHOR]

[Display omitted] • Adsorption of toluene and naphthalene by OMS were investigated by simulation. • The adsorption selectivity of toluene and naphthalene was predicted by IAST. • The mechanism of selective adsorption was elucidated at molecular level. • Adsorbents with the desired pore size were prepared by template synthesis method. • The experimental results are in good agreement with the simulation results. In order to ensure regeneration property of adsorption materials in the air pollution purification system of the airtight cabin, such as submarine and space station, it is necessary to selectively separate semi-volatile organic compounds whose desorption is difficult. For this reason, the effects of pore size on the adsorption capacity and adsorption selectivity of toluene and naphthalene were investigated by both molecular simulation and experimental investigation. The ordered porous silica-based adsorbents with pore sizes ranging from 1.0 nm to 2.8 nm were constructed by simulation and were prepared by template synthesis method in this study. Both simulation and experiment show that the adsorption capacity of toluene and naphthalene firstly increased and then decreased with the increase of the pore size of adsorbents from 1.0 nm to 2.8 nm, and the pore diameter (1.3 nm) corresponding to the maximum adsorption amount of toluene was smaller than that (2.3 nm) of naphthalene. Simulation results show that the adsorption energy and adsorption stability of naphthalene are higher than those of toluene, and binary-component co-adsorption experiments also testified that toluene molecules could be replaced by naphthalene molecules. The optimum pore size for selective adsorption of naphthalene is 2.3 nm. [ABSTRACT FROM AUTHOR]