Self-healing MPs were prepared with tetrazole group for coordinating with FeCl3·6H2O by one-pot method. This simple and efficient synthesis will provide a green route for preparing excellent self-healing materials.
Abstract Acridone as a new kind of visible light photocatalyst has been developed to catalyze metal free atom transfer radical polymerization (ATRP). The photocatalyst possess low excited state potential as can undergo an oxidative quenching pathway to initiate ATRP of vinyl monomers. Kinetic study and light on/off reaction demonstrate the “living”/controlled nature of the polymerization by light. Block copolymers can be achieved by using PMMA as macroinitiator to reinitiate polymerization of other vinyl monomers, which shows highly preserved Br chain‐end functionality in the synthesized polymers. Moreover, the polymerization can be conducted under air atmosphere as most photocatalysts need anaerobic condition, which may give inspiration of further application of this kind of photocatalyst.
Solar steam generation is considered a promising approach to provide the solution for water scarcity. To solve the problem of organic pollutions’ enrichment on traditional solar absorbers, herein, a self‐cleaning absorber, which consists of Cs X WO 3 nanorods‐anchored hydrogenated TiO 2− X nanowires based on a flexible Ti mesh (H‐TiO 2− X /Cs X WO 3 ), is proposed. The well‐designed H‐TiO 2− X nanowires grown on Ti mesh contain a rational concentration ratio of surface oxygen vacancies (O V ) to bulk O V , and the introduced W 5+ and O V in Cs X WO 3 nanorods are also demonstrated. The defects in H‐TiO 2− X /Cs X WO 3 endow it with a superior photocatalytic activity and light absorption in the full spectrum. Importantly, the enrichment of organic molecules, both on the surface of solar absorbers and in bulk water is carefully studied during solar steam generation. Compared with the spatially separated evaporation device without photocatalytic activity, the multifunctional H‐TiO 2− X /Cs X WO 3 composite can not only accomplish a high evaporation rate of 1.46 kg m −2 h −1 , but also prevent the surface enrichment of dye after continuous 12 h evaporation or after 20 cycle tests. Integrating photocatalysis into solar‐driven water evaporation optimizes the performance and broadens the application field.
Heavy metal pollution to aqueous media is an important issue for environmental sustainability. A simple strategy for the synthesis of an efficient adsorbent is strongly desired for water remediation. Herein, aminopyridine functionalized magnetic Fe3O4 (HO–Fe3O4@ SiO2–AP) with excellent adsorption capacity and selectivity was synthesized by a feasible one-pot sequential reaction. As a comparison, the same adsorbent was also prepared by the general step-by-step surface modification method. The structure characterization and adsorption performance prove the efficiency of this strategy. The factors that affect the adsorption were determined. X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and Density Functional Theory calculation were used to demonstrate the adsorption mechanism. As HO–Fe3O4@SiO2–AP exhibits competitive adsorption capacity and excellent adsorption selectivity, it can be used potentially for robust removal, preconcentration, and recovery of aqueous Hg(II) and Ag(I).
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