Abstract
Photo-catalytic elimination of organic contaminants plays a significant role in wastewater treatment. Developing a highly efficient photo-catalyst is one of the leading research topic. Herein, we reported the fabrication of a novel nanoporous NiO@SiO2 photo-catalyst by a simple ion-exchange method to eliminate the reactive dyes. The synthesized NiO@SiO2 catalyst exhibited fast photo-degradation and excellent adsorption capability and could efficiently remove Red FN-3GL dye from wastewater, due to a high loading of NiO and a large specific surface area, abundant electron-withdrawing groups, as well as narrow bandgap energy. In addition, the NiO@SiO2 photo-catalyst also displayed a high capability to remove reactive dyes over a wide range of pH values (pH 3–9). The prominent adsorption and photo-degradation of dyes were strongly dependent on the surface charge of the catalyst and the generation of hydroxyl radicals (OH•) by the catalyst, respectively. Furthermore, the NiO@SiO2 photo-catalyst also exhibited excellent recyclability, thus demonstrating the feasibility of practical applications in industries. The strategy of covering the metal oxide to nanoporous silica is a promising method for developing active photo-catalysts and applying them in the wastewater treatments.
Original language | English |
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Article number | 100677 |
Journal | Materials Today Chemistry |
Volume | 23 |
DOIs | |
Publication status | Published - Mar 2022 |
Externally published | Yes |
Keywords
- Adsorption
- Ion-exchange
- Nanoporous NiO@SiO
- Photo-degradation
- Wastewater treatment
ASJC Scopus subject areas
- Catalysis
- Electronic, Optical and Magnetic Materials
- Biomaterials
- Polymers and Plastics
- Colloid and Surface Chemistry
- Materials Chemistry