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Rape Pollen-Templated Synthesis of C,N Self-Doped Hierarchical TiO2 for Selective Hydrogenation of 1,3-Butadiene

Jiang, Xia, Liu, Yang, Hao, Haijiao, Xu, Yan, Huang, Jiale, Sun, Daohua, Li, Qingbiao
ACS sustainable chemistry & engineering 2018 v.6 no.1 pp. 882-888
energy, hydrogenation, pollen, temperature, titanium dioxide
Herein, we described a mild and facile method for the synthesis of three-dimensional (3D) hierarchically porous TiO₂. This method simultaneously realized the C,N self-dopant, introduced more surface defectives, and decreased in the band-gap energy (Eg) of TiO₂. Rape pollen was chosen as the biotemplate to prepare TiO₂, and the pore property of the obtained products could be adjusted by changing the amount of Ti precursor and calcination temperature. The as-synthesized pollen-TiO₂ not only duplicated the morphology of rape pollen, but also showed enhanced 1-butene selectivity in the reaction of selective hydrogenation of 1,3-butadiene after loading elemental Pd, when comparing with the commercial TiO₂. Butenes selectivity of 98% and 1-butene selectivity of 66% were achieved at 50 °C, because of the hierarchically porous structure of pollen-TiO₂ and the lower Eg and more surface defects resulting from the C,N dopant.