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Pd/TiO2 doped faujasite photocatalysts for acetophenone transfer hydrogenation in a photocatalytic membrane reactor
Journal of Catalysis ( IF 7.3 ) Pub Date : 2017-08-04 , DOI: 10.1016/j.jcat.2017.07.015
Cristina Lavorato , Pietro Argurio , Teresa F. Mastropietro , Giuseppe Pirri , Teresa Poerio , Raffaele Molinari

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 TiO2 particles 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 gTiO2−1 h−1 cm2 W−1 vs 19.11 mg gTiO2−1 h−1 cm2 W−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.



中文翻译:

Pd / TiO 2掺杂八面体光催化剂在光催化膜反应器中用于苯乙酮转移加氢

已经制备了不同的八面钛钛光催化剂,并在将苯乙酮氢化成苯乙醇(工业上相关的产品)中进行了测试。已经使用了水作为溶剂,甲酸作为氢和电子给体,并采用了紫外线和可见光辐照。使用丙醇作为溶剂(TF10P)制备的10%负载八面钛钛合金表现出最佳的TiO 2均匀分散性沸石表面上的颗粒,BET和孔体积值以及光催化性能。带有Pd颗粒(Pd_TF10P)的TF10P光催化剂的进一步功能化将催化响应转移到可见光范围内。在可见光下使用Pd_TF10P光催化剂通过光强度归一化的生产率略低于在紫外光下使用TF10P所获得的生产率(12.56 mg g TiO2 -1h -1  h -1 cm 2  W -1 对19.11 mg g TiO2 -1  h -1 cm 2  W -1),但优势可能是使用直接太阳光作为能源。该光催化膜反应器具有从反应相到有机相的约100%的苯乙醇萃取百分数。25%。结果还证明了在该光催化体系中将可见光用于苯乙酮的光催化还原的可能性。

更新日期:2017-08-04
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