Solar thermoelectric field plus photocatalysis for efficient organic synthesis exemplified by toluene to benzoic acid
Solar thermoelectric field plus photocatalysis for efficient organic synthesis exemplified by toluene to benzoic acid
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太阳能热电场加光催化高效有机合成，以甲苯制苯甲酸为例
DOI：
10.1016/j.apcatb.2016.04.024
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发表时间：
2016-09
期刊：
影响因子：
--
通讯作者：
Baohui Wang
中科院分区：
文献类型：
--
作者：
Yanji Zhu;Huaiyuan Wang;Baohui Wang
太阳能热电化学法合成苯甲酸是一种利用太阳能进行有机合成的有效方法。研制了苯甲酸高产率、高选择性的石墨阳极和铂阳极。在这篇文章中，我们提出了第一个演示的太阳能热-电-光场高效合成苯甲酸使用二氧化钛纳米管电极。通过调节三个太阳能场过程，甲苯在光活性、电驱动、热活化的TiO 2纳米管电极表面被氧化。结果表明，三种电场对甲苯在TiO 2电极上的氧化具有协同效应。随着温度的升高，苯甲酸的收率和甲苯的转化率都有较大的提高，在90 ℃时，苯甲酸的收率和甲苯的转化率分别达到26.1%和62.6%。在此过程中，太阳热降低了甲苯氧化的电解电位。羟基、羧基和OOH基团以及TiOC键在TiO 2纳米管电极表面的出现，导致紫外和可见光吸收增加，TiO 2光催化性能显著增强，提高了苯甲酸的产率。同时，施加的太阳电势促进光生电子和空穴的分离。结果表明，TiO 2的光催化效率得到了提高。
The solar thermal electrochemical process synthesis of benzoic acid is an efficient way for organic synthesis based upon solar energy utilization. Graphite and platinum anodes have been developed with high yield and selectivity of benzoic acid. In this article, we present the first demonstration of the solar thermal-electro-photo field for efficient benzoic acid synthesis by using TiO2nanotubes electrode. By adjusting the three-solar field process, toluene is oxidized at the surface of the photoactive, electrically driven, heat activated TiO2nanotubes electrode. Results showed that, the synergistic effect of the three fields was found for enhancement of toluene oxidation at TiO2electrode. The yield of benzoic acid and conversion of toluene is greatly improved with temperature, and arriving to 26.1% and 62.6% at 90 °C, respectively. In this process, solar thermal decreases the electrolysis potential of toluene oxidation. Hydroxyl, carboxyl and OOH groups, as well as the emergence of TiOC bond at the surface of the TiO2nanotubes electrode, lead to an increased UV and visible absorption and a significant enhancement of TiO2photocatalytic properties to increase the yield of benzoic acid. Simultaneously, an applied solar electric potential promotes the separation of photogenerated electrons and holes. As a result the efficiency of TiO2photocatalysis enhanced.
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影响因子：
9.5
作者：
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