Controlled-release kinetics of hydrogen peroxide from dextran-coated calcium peroxide nanoparticles
In this study, the controlled release kinetics of hydrogen peroxide (H _2 O _2 ) from dextran-coated calcium peroxide nanoparticles (DEX@CaO _2 (DEX) NPs) were investigated. CaO _2 NPs were synthesized and coated with dextran to regulate the release of oxidants (H _2 O _2 ). Controlled-release behav...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2025-01-01
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| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/adef9b |
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| Summary: | In this study, the controlled release kinetics of hydrogen peroxide (H _2 O _2 ) from dextran-coated calcium peroxide nanoparticles (DEX@CaO _2 (DEX) NPs) were investigated. CaO _2 NPs were synthesized and coated with dextran to regulate the release of oxidants (H _2 O _2 ). Controlled-release behavior was examined using a cerium sulfate assay, which revealed that dextran coating significantly moderated H _2 O _2 release. Approximately 52.7% of the total H _2 O _2 content was released gradually within 180 min, compared to the rapid and complete release from the uncoated NPs. Kinetic analysis demonstrated that H _2 O _2 release from DEX@CaO _2 (DEX) NPs followed pseudo-first-order kinetics ( R ^2 = 0.995), indicating diffusion-controlled release through the dextran matrix. The Korsmeyer–Peppas model further indicates an anomalous transport mechanism characterized by both diffusion and polymer relaxation (release exponent n ≈ 0.6). These findings confirm that dextran coating effectively modulates the release kinetics and provides sustained oxidant availability, which is beneficial for prolonged environmental remediation applications. |
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| ISSN: | 2053-1591 |