Boosted Activity for Toluene Selective Photooxidation over Fe-Doped Bi 2 WO 6

作者：Xinxin Deng, Tian Sheng, Zhao-Ming Chai, Zhangjun Bai, Yuxuan Tan, Lang Chen, Jun‐Kang Guo, Sheng Shen, Meng‐Qiu Cai, Chak‐Tong Au, Shuang‐Feng Yin · 发表于：Industrial & Engineering Chemistry Research · 年份：2020 · DOI：10.1021/acs.iecr.0c02872 · 被引用次数：66 · 研究领域：Advanced Photocatalysis Techniques、Catalytic Processes in Materials Science、Gas Sensing Nanomaterials and Sensors

Selective photooxidation of toluene to benzaldehyde using O 2 as an oxidant has the advantages of mild reaction conditions and excellent atomic economy, but it often suffers from low conversion efficiency. To promote the photooxidation process, we fabricated iron-doped Bi 2 WO 6 microflowers by a simple hydrothermal method to boost the formation of oxygen vacancies. The rich presence of oxygen vacancies not only accelerates the separation of photogenerated charge carriers but also enhances O 2 activation for ·O 2 – generation. Besides the slight improvement of Bi 2 WO 6 stability, the Fe-doped Bi 2 WO 6 displays enhanced activity and selectivity for benzaldehyde generation from toluene under visible light. This work illustrates a simple strategy for successful modulation of Bi 2 WO 6 for improved performance in the photocatalytic selective oxidation processes.