Journal
NANOMATERIALS
Volume 12, Issue 16, Pages -Publisher
MDPI
DOI: 10.3390/nano12162863
Keywords
Ag nanoparticles doped porous ZnO heterostructure; photocatalysis; localized surface plasmon resonance; synergetic effect
Categories
Funding
- National Key R&D Program of China [2021YFA1201500, 2020YFA0211300]
- National Natural Science Foundation of China [92150110, 92050112, 12074237, 12004233]
- Fundamental Research Funds of Central Universities [GK202201012, GK202103018]
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A Ag-nanoparticles-doped porous ZnO photocatalyst has been prepared and tested for its catalytic activity towards 4-nitrophenol. The heterostructure photocatalyst shows excellent catalytic performance due to the synergetic effect of Ag nanoparticles and porous ZnO.
Oxide-supported Ag nanoparticles have been widely reported as a good approach to improve the stability and reduce the cost of photocatalysts. In this work, a Ag-nanoparticles-doped porous ZnO photocatalyst was prepared by using metal-organic frameworks as a sacrificial precursor and the catalytic activity over 4-nitrophenol was determined. The Ag-nanoparticles-doped porous ZnO heterostructure was evaluated by UV, XRD, and FETEM, and the catalytic rate constant was calculated by the change in absorbance value at 400 nm of 4-nitrophenol. The photocatalyst with a heterogeneous structure is visible, light-responsive, and beneficial to accelerating the catalytic rate. Under visible light irradiation, the heterostructure showed excellent catalytic activity over 4-nitrophenol due to the hot electrons induced by the localized surface plasmon resonance of Ag nanoparticles. Additionally, the catalytic rates of 4 nm/30 nm Ag nanoparticles and porous/nonporous ZnO were compared. We found that the as-prepared Ag-nanoparticles-doped porous ZnO heterostructure catalyst showed enhanced catalytic performance due to the synergetic effect of Ag nanoparticles and porous ZnO. This study provides a novel heterostructure photocatalyst with potential applications in solar energy and pollutant disposal.
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