Porous Mn2O3/pSiO2 Nanocomposites on Bio-scaffolds for Tetracycline Degradation
Source abstract
Abstract
In this study, manganese sesquioxide (Mn2O3) nanoparticles (NPs) were inserted into porous silica (pSiO2) and thus a mosaic-like porous composite of Mn2O3/pSiO2 was constructed by a bio-templating route. Structure and morphology analyses reveal the successful assembly and high dispersion of Mn2O3 NPs on the matrix of porous SiO2. Because of the presence of a porous structure and high number of accessible active sites, the resulting Mn2O3/pSiO2 exhibits both large adsorption capacity and remarkable catalytic activity for the removal of tetracycline (TC, 80 mg·L–1) from aqueous solutions. With the assistance of H2O2, Mn2O3/pSiO2 could synergistically degrade TC with a total removal efficiency (RE) of 80%, which is much greater than those of pSiO2 (13%) and nMn2O3 (63%). Meanwhile, Mn2O3/pSiO2 possesses a wide pH application range (3.0–11.0, RE > 83%), quite good efficiency (64%) for highly concentrated TC (240 mg·L–1), and excellent reusability (RE = 70% after four cycles). Radical-trapping tests and electrochemical measurements reveal that a direct electron transfer pathway plays the dominant role in this TC–Mn2O3/pSiO2–H2O2 catalytic system. This study provides a convenient and effective strategy to design porous composite adsorbents/catalysts for the remediation of antibiotic wastewater.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Adsorption and biosorption for pollutant removal · Covalent Organic Framework Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Jiangsu Key Laboratory for Environment Functional Materials, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
Funding
Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials · Science and Technology Development Project of Suzhou · Project of Jiangsu Collaborative Innovation Center of Technology and Material for Water Treatment · Jiangsu Innovation Project for Graduate Education
References (65)
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