Photo-controllability of fluoride remediation by spiropyran-functionalized mesoporous silica powder
| Autor: | Jinming Chang, Zi Wang, Zhouliang Chen, Xiaoyu Guan, Haojun Fan, Mengyan He |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Spiropyran
Nanocomposite Process Chemistry and Technology Nanoparticle 02 engineering and technology 010501 environmental sciences Mesoporous silica 021001 nanoscience & nanotechnology 01 natural sciences Pollution chemistry.chemical_compound Adsorption chemistry Chemical engineering Desorption Chemical Engineering (miscellaneous) Merocyanine 0210 nano-technology Waste Management and Disposal Fluoride 0105 earth and related environmental sciences |
| Zdroj: | Journal of Environmental Chemical Engineering. 9:104655 |
| ISSN: | 2213-3437 |
| Popis: | Fluoride contamination in water continues to be a great challenge to the sustainable development of global fluorine-containing industries. It is still a challenge to avoid the use of chemical desorbents induced secondary contamination in regenerating fluoride adsorbents. In this work, we aim to design a nanoadsorbent (SP@SiO2) specifically applicable for fluoride (F−) adsorption and desorption without using chemical desorbents, but via the approach of light-induction. The SP@SiO2 was fabricated by conjugating a rationally synthesised light-sensitive compound, spiropyran (SP), onto engineered mesoporous silica (SiO2) nanoparticles. Results showed that there was ∼0.14-0.15 mmol of SP conjugated onto per g of nanocomposite surface, forming a core-shell structure, which can realize conformational freedom of SP ↔ MC (merocyanine) transformation and corresponding adsorption and desorption fluoride under photo-controllable manner. Based on these, we intend to engineer a nanoadsorbent for F− remediation that may be potential guidance for those poisonous anions adsorption and light-induced desorption based on spiropyran-functionalized materials. |
| Databáze: | OpenAIRE |
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