Abstract
Phytic acid doped polypyrrole (PPy) as a mediating layer was in-situ coated on cotton fibers (CFs) to promote the growth of Prussian blue (PB) and construct the PB/PPy@CFs composite. The results showed that the proper amounts of PA doped PPy in-situ generated significantly promoted the growth of PB on CFs, the PB deposition ratio increased from 12.29% (PB@CFs) to 32.4% (PB/PPy@CFs), and the growth of PB on PPy@CFs could be completed in 4 h. Scanning electron microscopy (SEM) showed that the PB particles with perfect nano cubic structure were formed in the composite. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) showed that both PB and PPy were successfully deposited on CFs. The PB/PPy@CFs composite had excellent light absorption, hydrophilicity, wettability, and photothermal property, and the surface could be heated up to 81.5 °C under one sun illumination. The PB/PPy@CFs composite as a photothermal conversion material was used for solar-driven interfacial water evaporation, the water evaporation rate was 1.36 kg·m−2·h−1 at the optical concentration of 1 kW·m2, and the corresponding photothermal conversion efficiency increased from 81.69% (PB@CFs) to 90.96% (PB/PPy@CFs).
Highlights
With the great development of the world economy and industry, and people’s pursuit of higher quality of life, the demand for energy is increasing [1,2]
1 kW·m2, and the corresponding photothermal conversion efficiency increased from 81.69% (PB@cotton fibers (CFs)) to 90.96% (PB/PPy@CFs)
The deposition ratio of Prussian blue (PB) decreased when Phytic acid (PA) dosage was beyond 3 mmol, which might be because too many PA molecules occupied the active sites of PPy
Summary
With the great development of the world economy and industry, and people’s pursuit of higher quality of life, the demand for energy is increasing [1,2]. PB has strong light absorption ability, good the C≡N (Fe2+ bonds with C, Fe3+ bonds with N), and such a structure renders a good thermal stability, high mechanical strength, and low manufacturing cost It has been photostability of PB nanoparticles [15,16]. PB has strong light absorption ability, good demonstrated that PB has excellent photothermal effect arising from a metal-to-metal thermal stability, high mechanical strength, and low manufacturing cost. It has been charge transfer from Fe2+ to Fe3+ [17,18]. Schematic illustration of preparation and photothermal interfacial water evaporation application of PB/PPy@CFs composite
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