Exploring CuxO-doped TiO2 modified with carbon nanotubes for CO2 photoreduction in a 2D-flow reactor
Exploring CuxO-doped TiO2 modified with carbon nanotubes for CO2 photoreduction in a 2D-flow reactor
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DOI：
10.1016/j.jcou.2021.101796
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发表时间：
2021-11-08
影响因子：
7.7
通讯作者：
Cazorla-Amoros, D.
中科院分区：
文献类型：
--
作者：
Fernandez-Catala, J.;Navlani-Garcia, M.;Cazorla-Amoros, D.
基于TiO 2和CuxO的组合的不同的光催化剂已经通过简单和可重复的程序制备。所合成的系统已被应用于光还原CO2产生CH 4内的2维流动反应器中，其中的气体流是通过在紫外线照射下的催化剂的薄层。光催化剂的分析表明，铜的氧化态在整个反应过程中发生变化，从而改变了催化剂的物理化学性质。核心水平和价带水平光谱的组合使我们能够绘制最佳催化剂的带图，显示Z-方案结构。反应器设计和开发的光催化剂可以以非常高的生产率和极高的效率生产CH 4。在通过抑制副反应进一步优化后，我们获得了使用低功率LED照明的CH 4形成速率超过100 μ mol（CH4.gcat-1）h（-1）的任何类型的反应器或催化系统的最高值之一。
Different photocatalysts based on the combination of TiO2 and CuxO have been prepared by simple and reproducible procedures. The synthesized systems have been applied in the photoreduction of CO2 to yield CH4 inside a 2-dimensional flow reactor in which the gas stream was passed over a thin layer of the catalyst under UV irradiation. Analysis of the photocatalysts reveals that the oxidation state of Cu changes throughout the reaction, thus modifying the physicochemical properties of the catalysts. The combination of core-level and valence-band level spectroscopies allowed us to draw the band diagram for the best catalyst, showing a Z-scheme structure. The reactor design and the photocatalyst developed can produce CH4 at a very high production rate with extreme efficiency. After further optimization through suppression of side reactions, we obtained one of the highest values reported for any type of reactor or catalytic system with a CH4 formation rate over 100 mu mol(CH4.gcat-1) h(-1) using low power LED lighting.