TiO2 doped HKUST-1/CM film in the three-phase photocatalytic ammonia synthesis system. Issue 13 (1st July 2021)

• Record Type: Journal Article
• Authors: Wang, Weiwen; Ji, Zhengnan; Zhang, Delu; Sun, Pengxia; Duan, Jihai
• Is Part Of: Ceramics international. Volume 47:Issue 13(2021)
• Page Start: 19180
• Page End: 19190
• Publication Date: 2021-07-01
• Subjects: Photocatalysis N2 reduction -- Synthesis of ammonia -- Three phase system -- Photocatalytic film; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.03.265
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Photocatalytic synthesis of ammonia from N2 and H2 O at room temperature and atmospheric pressure is considered to be a safe, clean and sustainable method. Due to the low solubility and diffusion coefficient of nitrogen in water, the rate of ammonia synthesis is significantly hindered. As a result, we develop a kind of thin film photocatalyst, which can be used in gas-liquid-solid three phase reaction system to solve this problem. The catalyst bases on HKUST-1 thin film with high nitrogen adsorption performance and supported with TiO2 nanoparticles with photocatalytic nitrogen fixation performance. The constructed binary composite photocatalyst has a stable structure under a 300 W xenon lamp, which exhibits good photoelectric conversion performance. While characterizing the structure and photoelectric performance of the material, the performance of photocatalytic ammonia synthesis was investigated. The highest ammonia synthesis efficiency was 0.048 μmol·h −1 ·cm −2, and its performance was 2.8 times that of TiO2 /CM catalyst under the same conditions. The thin film catalyst does ' t contain any N substance and won ' t interfere with the ammonia synthesis reaction. The preparation process is simplified by directly using the copper source in the CM without additional metal reagent. Moreover, it provides a new idea for the design of photocatalytic catalysts for ammonia synthesis. Highlights: The three-phase ammonia synthesis system has a certain degree of innovation. The photocatalytic synthesis of ammonia using HKUST-1 material is novel. Developed a new preparation process and application direction for MOF film. The entire reaction system has no N-containing substances, which ensures the accuracy of the results.