Zhang Jiakun, Sun Weixu, Ding Xin, Xia Kai, Liu Tao, Zhang Xiaodong
College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China.
Nanomaterials (Basel). 2023 Jan 28;13(3):526. doi: 10.3390/nano13030526.
Photocatalytic technology, with features of wide applicability, mild reaction conditions and sunlight availability, satisfies the requirements of "green chemistry". As the star photoanode material for photoelectrochemical catalysis, WO has a suitable band gap of 2.8 eV and a strong oxidation capacity, as well as displaying great potential in organic wastewater degradation. However, its performance is usually hindered by competition with water oxidation to generate peroxides, rapid charge complexation caused by surface defect sites, and so on. Herein, WO films modified with cobalt-phosphate (Co-Pi/WO) film were prepared and involved in photocatalytic organic wastewater degradation. A degradation rate constant of 0.63311 h was obtained for Co-Pi/WO, which was much higher than that of WO, 10.23 times that of direct photocatalysis (DP) and 23.99 times that of electrocatalysis (EC). After three cycles of degradation, the film can maintain a relatively good level of stability and a degradation efficiency of 93.79%.
光催化技术具有适用范围广、反应条件温和且可利用太阳光等特点，满足了“绿色化学”的要求。作为光电化学催化的明星光阳极材料，WO具有合适的2.8 eV带隙和较强的氧化能力，在有机废水降解方面也显示出巨大潜力。然而，其性能通常受到与水氧化生成过氧化物的竞争、表面缺陷位点导致的快速电荷复合等因素的阻碍。在此，制备了用磷酸钴（Co-Pi/WO）膜修饰的WO膜，并将其用于光催化有机废水降解。Co-Pi/WO的降解速率常数为0.63311 h，远高于WO，是直接光催化（DP）的10.23倍，电催化（EC）的23.99倍。经过三个降解循环后，该膜可保持相对良好的稳定性水平，降解效率为93.79%。
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