Journal
NANOMATERIALS
Volume 9, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/nano9071054
Keywords
Z-scheme photocatalyst; Ag; AgI; alpha-MoO3; thiophene; desulfurization
Categories
Funding
- National Natural Science Foundation of China [21663030]
- Project of Science and Technology Office of Shaanxi Province [2016DDJC-19, 2015GY174, 2015SF291]
- Project of Science and Technology of Yan'an City [2016CGZH-12-01, 2015CHTD-04]
- Science and Technology Plan Project of Yan'an University [YD2015-13]
- [YCX201734]
- [12288]
- [1553]
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The novel ternary-component Ag/AgI/alpha-MoO3 (AAM) photocatalyst was successfully fabricated by a facile hydrothermal method combined with a charge-induced physical adsorption and photo-reduced deposition technique. X-ray diffraction, scanning/transmission electron microscope, X-ray photoelectron, UV-vis diffuse reflectance, photoluminescence and electrochemical impedance spectroscopy were employed to characterize the composition, morphology, light-harvesting properties and charge transfer character of the as-synthesized catalysts. The ternary-component AAM heterojunctions exhibited an excellent visible-light photocatalytic oxidative desulfurization activity, in which the AAM-35 (35 represents weight percent of AgI in AAM sample) possessed the highest photocatalytic activity of the conversion of 97.5% in 2 h. On the basis of band structure analysis, radical trapping experiments and electron spin resonance (ESR) spectra results, two different catalytic mechanisms were suggested to elucidate how the photogenerated electron-hole pairs can be effectively separated for the enhancement of photocatalytic performance for dual composites AM-35 and ternary composites AAM-35 during the photocatalytic oxidative desulfurization (PODS) of thiophene. This investigation demonstrates that Z-scheme Ag/AgI/alpha-MoO3 will be a promising candidate material for refractory sulfur aromatic pollutant's removal in fossil fuel.
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