## 4 Conclusions  
Divinylbenzene-_co_-triethoxyvinylsilane microspheres were synthesized at different component molar ratios (DVB:TEVS = 1:2, DVB:TEVS = 1:1 and DVB:TEVS = 2:1). The obtained materials were characterized by differentiated morphology and porosity. The DVB:TEVS = 1:2 microspheres showed many deviations from the ideal spherical form, while the DVB:TEVS = 2:1 microspheres were characterized by the most regular shape, uniform and smooth surface. FTIR/ATR spectroscopy confirmed the incorporation of TEVS into the polymeric structure of the synthesized materials. The SAXS and nitrogen adsorption-desorption techniques produced similar results regarding the structural characteristics of the copolymers. The specific surface areas determined by both methods were similar with slight differences indicating a low amount of closed porosity. The correlation between the structure parameters (specific surface area and pore total volume) and DVB:TEVS ratio was found.  
The adsorption properties of the synthesized microspheres towards nitrobenzene, 4-nitrophenol and phenol were studied by kinetic measurements. Generally, the differences in the amount and rate of concentration loss from the solutions of all solutes were observed. For all tested materials the strongest decrease of adsorbate concentration was found for nitrobenzene, and the lowest for phenol which was connected with adsorbate solubility/hydrophobicity. For nitrobenzene adsorption the greatest adsorbate losses from the solution were observed in the case of the most hydrophobic DVB:TEVS = 2:1, however, for 4-nitrophenol and phenol adsorption the greatest adsorbate losses were found for DVB:TEVS = 1:1. The adsorption effectiveness of DVB:TEVS = 2:1 and DVB:TEVS = 1:2 materials towards different adsorbates was similar, however, DVB:TEVS = 1:1 showed quite different properties. The measured kinetic profiles revealed the global effect of several factors: the hydrophobic/hydrophilic properties, the structural adsorbent characteristics, the polymer swelling, the adsorbent-adsorbate interactions.  
The thermal analysis proved that the synthesized DVB-TEVS materials were thermally stable up to at least 330 \({}^{\circ}\)C, thus, they may be applied in relatively wide temperature ranges. The weight losses for all materials with adsorbed organic solutes were higher in comparison to pure DVB-TEVS materials suggesting relatively weak adsorbent-adsorbate interactions of physical nature. The MS gaseous profiles revealed certain amounts of nitrogen compounds confirming adsorption of 4-nitrophenol and nitrobenzene.  
The synthesized polymeric materials showed remarkable selectivity towards various organic adsorbates confirmed by divergent uptakes and kinetic characteristics. They seem to be promising materials for adsorption and separation techniques.  
The following are available online. Figure S1: FTIR/ATR spectra of DVB, Figure S2: Adsorption kinetics for NB (a), P (b) and 4-NP (c) on DVB:TEVS = 2:1, DVB:TEVS = 1:2 and DVB:TEVS = 1:1 presented as changes in concentration over time, Figure S3: TG/DTG/DSC curves of DVB, Figure S4: 3D MS profile of thermal decomposition of DVB, Figure S5: MS spectra of thermal degradation of DVB at 450 \({}^{\circ}\)C and Figure S6: MS profiles of gaseous products of thermal degradation of DVB:TEVS = 1:1 and DVB (m/z = 189).  
Conceptualization, A.B, M.Z.-S., A.D.-M. and B.P.; Material synthesis, B.P.; Investigation, A.B., M.Z.-S. and M.W.; Methodology, A.B., M.Z.-S., M.W. and A.D.-M., Supervision, A.D.-M. and M.Z.-S.; Writing--original draft, A.B.; M.Z.-S., A.D.-M. and M.W. Writing--review and editing, A.B., A.D.-M., M.Z.-S., M.W. and B.P. All authors have read and agreed to the published version of the manuscript.  
This research received no external funding.  
Not applicable.  
Informed Consent Statement: Informed consent was obtained from all subjects involved in the study.  
The data are available by corresponding author.  
The authors declare no conflict of interest.  
Samples of the compounds are available from the authors.