Ferrocenyl Lawesson's reagent-based porous organic polymers for efficient adsorption-assisted photocatalysis degradation of organic dyes
The adsorption process followed by photodegradation, adsorption-assisted photocatalysis, is an efficient way to achieve an enhanced overall removal of pollutants from wastewater. This aim can be achieved by a new type of metallocene-based porous organic polymers, denoted as Ferrocenyl Lawesson'...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-02-01
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| Series: | Heliyon |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844025010989 |
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| Summary: | The adsorption process followed by photodegradation, adsorption-assisted photocatalysis, is an efficient way to achieve an enhanced overall removal of pollutants from wastewater. This aim can be achieved by a new type of metallocene-based porous organic polymers, denoted as Ferrocenyl Lawesson's reagent-metal-organic porous polymers (FcLR-MOPPs), including FcLR-P1 and FcLR-P2, synthesized through 1) synthesis of ferrocene-MOPPs (ferrocene-P1 and ferrocene-P2) through a Friedel-Crafts reaction between dimethoxymethane and ferrocene at two different ratios of 3:1 and 5:1 and 2) reaction of the ferrocene-MOPPs with phosphonium pentasulfide (P2S5). The photodegradation efficiencies of methylene blue (MB) and methyl orange (MO) toward FcLR-MOPPs were higher than those of the ferrocene-MOPPs. In contrast, the adsorption efficiencies of the dyes declined after the reaction of ferrocene-MOPPs with P2S5. In both cases, a higher photocatalytic activity and adsorption affinity were observed towards MB dye. When combined degradation/adsorption of dyes was investigated, a boosted dye elimination was observed for both the MOPP-based catalysts. FcLR-P1, as the optimal catalyst with the MB degradation/adsorption efficiency of 87.0 % ± 3.0, indicated a pseudo-first-order kinetic model for degradation of MB with a degradation rate constant of 0.074 min−1, a pseudo-second-order kinetic model and Langmuir isotherm for adsorption of MB, and high reusing after three cycles of use. A band gap energy (Eg) value of +2.3 eV was determined for FcLR-P1 via Tauc plots, consistent with the Eg value obtained from the cyclic voltammetry curves (+1.98 eV). Mott-Schottky plots consistent with radical trapping experiments indicated •OH species as the critical species in the MB photodegradation. |
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| ISSN: | 2405-8440 |