Titanium phosphonate adsorbent materials with hierarchically porous structure were fabricated using the hydrolysis of tetrabutyl titanate in different organophosphonic acids solutions. Based on the macroporous structure of 100-2000 nm in size, a worm-hole like mesostructure was in the macropore walls, which was supported by the scanning electron microscopy(SEM), transmission electron microscopy(TEM), and N_2 sorption analysis. Fourier transform infrared spectroscopy(FT-IR) data indicated the organic groups inside the solid materials framework. NH_3 adsorption detection was performed using titanium phosphonate adsorbent materials and some significant results were obtained. The adsorption mechanism was also discussed in this study. Large adsorption amount(75.2 mg/g) was mainly attributed to the acid site via acid-base reactions and the physical adsorption site via Van der Waals forces. Resultant materials could effectively restrain the desorption of adsorbent NH_3 back into air causing secondary pollution, so it could make a promising potential use in decontamination of gas pollutants in the future.
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