Interfacial solar steam generation has emerged as a promising approach for alleviating global freshwater shortages. Growing research interest focuses on harnessing sustainable biomass materials like wood to achieve dual-functional systems that produce freshwater while harvesting evaporation-induced energy for electricity generation. In this study, a laser-scribed wood photoabsorber is proposed to enable efficient co-generation of fresh water and electricity. Through brush-coating of cobalt nitrate solution followed by laser direct writing, a composite layer of graphite-Co 3 O 4 nanoparticles was successfully fabricated on the surface of basswood. Both cobalt salt coating and delignification processing were demonstrated to enhance the evaporation and electricity output performance of laser-engineered wood photoabsorbers. The device realized an evaporation rate and an efficiency of 1.71 kg m -2 h −1 and 92.8 % under 1 sun irradiation, respectively. Under ambient conditions without light irradiation, a single device (2 × 2 × 1 cm 3 ) was able to produce an open-circuit voltage of ∼336 mV and a stable short-circuit current of ∼30 μA in pure water. Furthermore, when multiple devices were connected in series, the generated voltage was sufficient to light a light-emitting diode or power an electronic calculator. Through laser-scribing of biomass materials, this study develops a sustainable solar interfacial evaporator capable of simultaneous freshwater production and electricity generation.
In recent years, research on the conversion of CO 2 into fine chemical products has emerged as a prominent and dynamic area of study. In this study, four ligands were synthesized using salicylaldehyde , o-phenylenediamine, ethylenediamine , hexanediamine, and 2,6-diaminopyridine as precursors. Subsequently, these ligands were reacted with cobalt nitrate, zinc chloride , and aluminum chloride to synthesize 12 Schiff base metal complexes , which were employed as catalysts for the synthesis of propylene carbonate from CO 2 and epichlorohydrin . The findings reveal that the SF-L/Co catalyst demonstrated superior performance, potentially attributed to the robust chelating capability of Co, leading to the provision of more acidic metal centers. Characterization of SF-L/Co was conducted utilizing scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD) techniques. Process conditions were optimized, resulting in the achievement of a 100% yield and selectivity of propylene carbonate under optimal reaction conditions, without the generation of any by-products. Furthermore, the catalyst exhibited remarkable reusability, demonstrating consistent catalytic activity over five successive cycles without a substantial decrease in performance.
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