A Novel Alkali-activated Magnesium Slag-based Nanocomposite for Photocatalytic Production of Hydrogen

作者：Zhang, Yao Jun^*; Kang, Le; Si, Hai Xiao; Zhang, Ji Fang

来源：Integrated Ferroelectrics, 2014, 154(1): 120-127.

DOI：10.1080/10584587.2014.904189

• Alkali-activated magnesium slag
• CuO
• hydrogen production
• photocatalysis
• water-splitting

Alkali-activated magnesium slag-based nanocomposite (AMSN) by loaded about 5wt% CuO was synthesized and firstly employed as a novel catalyst for production of hydrogen by photocatalytic water-splitting. The XRD and XPS results indicated that there was principally mineralogical phase of calcium silicate hydrate (CSH) in AMSN, and CuO with a mean particle size of 15 nm dispersed on the surface of AMSN. The UV-visible diffuse reflectance spectrum and photoluminescence spectrum revealed that the CuO/AMSN sample showed a strong absorption edge at 1.4 eV and a weak photoluminescence peak at 394 nm, respectively. The CuO/AMSN catalyst showed the highest H-2 evolution in amount of 102.95 mu L/g by photocatalytic water-splitting for 6 h due to the synergistic effect between CSH skeleton network and CuO nanoparticles. A mechanism of photocatalytic H-2 production was suggested.

• 出版日期2014
• 单位西安建筑科技大学