Fe(III)-natural polyphenols bilayer coatings on fingered citron as a novel photothermal material for sustainable seawater desalination

Natural Cellulose Fiber-Derived Photothermal Aerogel for Efficient and Sustainable Solar Desalination

“…Accordingly, the SBFAP material exhibited diffraction peaks at the same positions but with lower intensities as compared to the SBF aerogel. This can be attributed to the presence of TA@Fe 3+ complexes in the SBFAP structure …”

“…The energy conversion efficiency (η eq , %) can be calculated by the following equation , η eq = normalΔ m h LV I where Δ m is the evaporation rate of seawater under 1 sun (the unit of Δ m is kg m –2 h –1 ), h LV is the enthalpy for the liquid vapor phase change in the SBFAP material (J g –1 ), and I is the energy intensity of the incident light (1 kW m –2 ). To explore benefits of applying the SBFAP in the evaporation process and identify the seawater evaporation enthalpy in the SBFAP material, the seawater evaporation performance in the SSG system under the dark conditions was evaluated.…”

“…While the former directly bonded to aromatic rings, the latter exhibited low polarity resulting from the absence of a conjugated system. 20 The TA@SBF solution was dispersed into 100 mL of PVA@Fe(III) solution; then, the mixture was ultrasonicated. The process formed crosslinking in the aerogel structure between the -OH groups of the SBF, PVA, TA (Figure S3a,b), and TA@Fe 3+ complexes (Figure S3c).…”

“…Substrates, such as metallic nanoparticles, semiconductors, polymers, carbon-based materials, and biomass, have been widely used for the fabrication of photothermal materials with various morphologies (e.g., 2D, 3D interconnected porous, hierarchical, conical structures, etc. ). , Consequently, the water evaporation performance of the SSG could reach approximately 2–4 kg m –2 h –1 , with an energy utilization efficiency of 100% for a relatively 3D-structural photothermal material. , However, the practical application of 3D-structural photothermal materials is still restricted due to their high fabrication cost and low structural stability during preservation and transportation. − Thus, future work is still needed to address these challenges.…”

Degradable and Recyclable Solar Desalination Membranes Based on Naturally Occurring Building Blocks

“…Naturally occurring molecules often offer us opportunities to fabricate functional materials with desirable properties. − Gallic acid (GA) is a typical kind of naturally occurring polyphenolic compound available from many fruits and vegetables. , GA can coordinate with Fe­(III) in an aqueous solution through its pyrogallol and carboxylic groups, resulting in ink-like products with a broad range of light absorption. − Besides, GA and Fe­(III) are both harmless and commonly found in plants and animals as micronutrients. The GA@Fe­(III) network can not only form stable versatile adhesive coatings but also be able to degrade quickly in acidic conditions without generating harmful degradation products. − Moreover, hydrophilic poly­(vinylidene fluoride) (PVDF) is selected as a substrate because of its high porosity, outstanding mechanical properties, and chemical stability .…”