Pd/TiO2 doped faujasite photocatalysts for acetophenone transfer hydrogenation in a photocatalytic membrane reactor
Pd/TiO2 doped faujasite photocatalysts for acetophenone transfer hydrogenation in a photocatalytic membrane reactor
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DOI：
10.1016/j.jcat.2017.07.015
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发表时间：
2017-09
影响因子：
7.3
通讯作者：
C. Lavorato;P. Argurio;T. F. Mastropietro;Giuseppe Pirri;T. Poerio;R. Molinari
中科院分区：
文献类型：
--
作者：
C. Lavorato;P. Argurio;T. F. Mastropietro;Giuseppe Pirri;T. Poerio;R. Molinari
制备了不同的钛八面沸石光催化剂，并将其用于苯乙酮的转移加氢反应。以水为溶剂，甲酸为氢和电子供体，紫外和可见光照射。以正丙醇为溶剂制备的负载量为10%的钛八面沸石（TF 10 P）具有最好的TiO 2颗粒在沸石表面的均匀分散性、BET值和孔容值以及光催化性能。用Pd颗粒（Pd_TF10P）进一步官能化TF 10 P光催化剂，使催化响应在可见光范围内移动。通过在可见光下使用Pd_TF 10 P光催化剂获得的由光强度归一化的生产率略低于通过在UV光下使用TF 10 P获得的生产率（12.56 mg gTiO 2 - 1h-1cm 2 W-1对19.11 mg gTiO 2 - 1h-1cm 2 W-1），但是优点可以是使用直接太阳光作为能源。该光催化膜反应器对苯乙醇的萃取率约为100%。百分之二十五实验结果也证明了该光催化体系中可见光用于苯乙酮光催化还原的可能性。
Different titanium faujasite photocatalysts have been prepared and tested in the transfer hydrogenation of acetophenone to phenyl ethanol, an industrially relevant product. Water as solvent, formic acid as hydrogen and electron donor and UV and visible light irradiation, have been employed. The 10% loaded titanium faujasite prepared using propanol as solvent (TF10P) showed the best homogeneous dispersion of TiO2particles on the zeolite surface, BET and pore volume values and photocatalytic performance. A further functionalization of the TF10P photocatalyst with Pd particles (Pd_TF10P), shifted the catalytic response in the visible range. The productivity, normalized by the light intensity, obtained by using the Pd_TF10P photocatalyst under visible light was a little lower than that obtained by using the TF10P under UV light (12.56 mg gTiO2−1h−1cm2W−1vs 19.11 mg gTiO2−1h−1cm2W−1) but the advantage could be the use of direct solar ligth as energy source. The photocatalytic membrane reactor had an extraction percentage of phenylethanol from the reactive phase to the organic phase of ca. 25%. The results also evidenced the possibility to use the visible light in this photocatalytic system in the photocatalytic reduction of acetophenone.