Journal
CATALYSTS
Volume 9, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/catal9100809
Keywords
mesoporous Co-SiO2; adsorption; Fenton-like catalysis; methylene blue
Categories
Funding
- Natural Science Foundation (NSF) of the Jiangsu Province-Outstanding Youth Project [BK20180103]
- Science and Technology Development Project of Suzhou [SYG201818]
- NSF of the Jiangsu Province [BK20180971]
- Jiangsu Collaborative Innovation Center of Technology and Material for Water Treatment
- Open Projects of the International Joint Laboratory of Chinese Education Ministry on Resource Chemistry [A-2017-002]
- State Key Laboratory of Materials-Oriented Chemical Engineering [KL17-06]
- Suzhou Key Laboratory for Nanophotonic and Nanoelectronic Materials and Its Devices [SZS201812]
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In this study, a series of Co3O4 nanoparticle-functionalized mesoporous SiO2 (Co-SiO2) were successfully synthesized via a spontaneous infiltration route. Co species were firstly infiltrated into the confined spaces between the surfactant and silica walls, with the assistance of grinding CoCl(3)6H(2)O and the as-prepared mesoporous SiO2. Then, Co3O4 nanoparticles (NPs) were formed and grown in the limited space of the mesopores, after calcination. Structures, morphologies, and compositions of the materials were characterized by X-ray diffraction, transmission electron microscopy, energy dispersion spectrum, N-2 adsorption, and Fourier transform infrared spectra. Results showed that the high content of Co (rCo:Si = 0.17) can be efficiently dispersed into the mesoporous SiO2 as forms of Co3O4 NPs, and the structural ordering of the mesoporous SiO2 was well-preserved at the same time. The Co3O4 NP functionalized mesoporous SiO2 materials were used as Fenton-like catalysts for removing methylene blue (MB) from aqueous solutions. The catalyst prepared at rCo:Si = 0.17 could completely remove the high-concentration of MB (120 mg.L-1), and also showed an excellent performance with a removal capacity of 138 mg.g(-1) to 180 mg.L-1 of MB. Catalytic mechanisms were further revealed, based on the degradation results.
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