Pengzhen Jin,Chunyan Hu,Jian Zheng,Zhijia Zhu,Baojiang Liu
Addressing global energy and freshwater scarcity requires sustainable, integrated technologies. Inspired by sunflower's water transport mechanisms, we developed a hydrophilic composite aerogel based on polyvinyl alcohol (PVA), chitosan (CS), and waterborne polyurethane (WPU). Incorporating carboxylated multi-walled carbon nanotubes (c-MWCNTs) yielded the BMPCW aerogel, a bifunctional system for simultaneous solar desalination and hydrovoltaic power generation. This design synergizes the aerogel's interfacial evaporation properties with c-MWCNTs' conductivity and photothermal conversion, significantly enhancing water/ion transport and energy conversion efficiency. Under 1 kW m −2 simulated sunlight, the system achieved a high freshwater evaporation rate of 3.41 kg m −2 h −1 and generated an open-circuit voltage of 125.2 mV in 3.5 wt% sodium chloride (NaCl) solution. The BMPCW aerogel exhibits excellent chemical stability, renewability, and maintains robust performance over multiple cycles. Aerogel array devices successfully demonstrated applicability in seawater desalination and powering small electronics. This work highlights the aerogel's potential for distributed energy, smart agriculture, and offshore applications, offering a novel biomaterial strategy and feasible pathway for sustainable clean water and green energy co-production.
The pursuit of clean energy generation and environmental preservation is of utmost importance for societal progress. However, couple clean energy production and pollution control is still a difficulty. In this study, a novel electrospun composite mat, with nano zero valent iron (Fe 0 , nZVI) encapsulated into polyacrylonitrile (PAN) nanofibers was acted as a catalyst. The activation energy (E a ) for the hydrolysis of NaBH 4 to produce hydrogen is 22 kJ·mol −1 , hydrogen atom utilization efficiency (HGE) of NaBH 4 is 60.80%. Three kinds of organic dyes 4-nitrophenol (4-NP), methylene blue (MB), and Rhodamine B (RhB) were served as the model pollutant, to construct NaBH 4 -organic system for energy production and pollution reduction. The NaBH 4 -organic system demonstrates a collaborative capability to simultaneously remove organic pollutants and generate hydrogen, with a coupling equilibrium point between the two processes. The hydrogen generation rate (HGR) and HGE increased with the concentration of pollutants increased. The degradation of 4-NP, MB, and RhB followed pseudo-first-order kinetics, with RhB degrading dosage 20 and 44 times higher than 4-NP and MB, respectively. H 2 and H· contributed to the organic degradation. nZVI directly participated in the formation H 2 and H·. PAN@Fe 0 possessed good recyclability and moderate cost. The degradation process adhered to the classical surface reaction controlled Langmuir-Hinshelwood (L-H) model. The integration of synergistic production capacity and pollutant degradation aligns well with the principles of green chemistry and sustainable development. This study demonstrates a novel approach to no precursor loss catalysts preparation, efficient production clean H 2 , advanced treatment of dye-containing wastewater, carbon neutral operation of sewage treatment plant.
危险品化学品经营许可证（带存储）