A study of Pt/WO3-carrier catalysts for photocatalytic purification of NO gas

作者：Dong, Pengyu^*; Xu, Ning; Xu, Yue; Wang, Xuefeng

来源：Catalysis Communications, 2016, 84: 142-146.

DOI：10.1016/j.catcom.2016.06.027

• Photocatalysis
• Pt/WO3
• Carrier
• NO removal

The products of Pt/WO3-carrier (e.g. ceramics, zeolite molecular sieves, activated carbon, and alumina) were fabricated by a sol-gel method, and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), and Barrett-Joyne-Halenda (BJH). The XPS results suggested that Pt in the Pt/WO3 sample existed as Pt instead of Pt2+. Moreover, the BET and BJH results indicated that the Pt/WO3-zeolite molecular sieves sample shows the largest BET specific surface area, while the Pt/WO3-Al2O3 sample shows the highest BJH pore volume. Furthermore, NO gas with different concentrations was used as the target pollutants to evaluate the photocatalytic activity. The photocatalytic activity of as-prepared samples was evaluated and compared by removal of NO gas under different irradiation reaction conditions, such as carriers, NO concentration, the space time and light source.The photocatalytic results showed that Pt/WO3-zeolite molecular sieves exhibited the highest conversion efficiency (>90% of the conversion efficiency) among all of the as-synthesized samples. What's more, the photocatalytic mechanism for NOx removal was analyzed. Overall, this paper provides a good model for practical applications of photocatalytic purification of NO gas.

• 出版日期2016-9-5
• 单位盐城工学院