Improving photocatalytic hydrogen evolution over CuO/Al₂O₃ by platinum-depositing and CuS-loading

详细信息    查看全文

• 作者：Li Zhang ; You-Nian Liu ; Minjie Zhou ; Jianhui Yan
• 关键词：CuO/Al2O3 ; CuS ; Photocatalysis ; Hydrogen evolution ; Simulated sunlight
• 刊名：Applied Surface Science
• 出版年：2013
• 出版时间：1 October, 2013
• 年：2013
• 卷：282
• 期：Complete
• 页码：531-537
• 全文大小：2961 K

文摘

CuO/Al₂O₃ microspheres have been fabricated using glucose as template by a polyethylene glycol (PEG-4000)-assisted one-pot hydrothermal method. Pt and CuS co-catalysts were loaded to investigate its photocatalytic activity for H₂ evolution in sacrificial reagent aqueous under simulated sunlight irradiation. The extended studies of sacrificial reagents types were also performed over Pt/CuO/Al₂O₃/CuS. The results show that the Pt/CuO/Al₂O₃/CuS photocatalyst exhibits higher photocatalytic activity than CuO/Al₂O₃ only loaded with 1.0 wt. % Pt or 1.0 wt. % CuS. After loading 1.0 wt. % CuS together with 1.0 wt. % Pt on CuO/Al₂O₃, the maximum H₂ evolution rate (4.51 mmol g^?1 h^?1) was obtained using oxalic acid as sacrificial reagent, which increases up to 1.44 times, 1.24 times and 1.17 times than that of CuO/Al₂O₃, Pt-CuO/Al₂O₃ and CuS-CuO/Al₂O₃, respectively. Therefore, the loading of CuS, together with Pt to modify the CuO/Al₂O₃ microspheres enhanced the photocatalytic activity. Here, CuS, together with Pt, acted as the dual co-catalysts for the improvement of photocatalytic performance. This study indicated that the application of CuS, combined with Pt as dual co-catalysts could provide an efficient way to design high-efficiency photocatalyst for solar to hydrogen conversion