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- 저자 : Goharshadi Elaheh K. (검색결과 2 건)
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Roya Mehrkhah,Elaheh K. Goharshadi,Mojtaba Mohammadi 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.101 No.-
Design of rational photoabsorbers is a promising approach to produce drinking water. Herein, a highlyefficient and scalable wood-based photoabsorber device composed of poplar wood as a substrate coatedwith FeNi with mole ratio of Fe/Ni = 85% and reduced graphene oxide (RGO) as top and bottom layers,respectively was designed for the interfacial solar desalination of seawater and heavy metal removalas a sorbent. Benefiting from high sunlight utilization and rapid water transport, high photothermal conversionfluxes of 1.50 and 4.77 kg m 2h 1 were achieved by the most efficient double-layer photoabsorberof W= FeNi4 5RGO4 5 (wood coated with 4.5 g L 1 of FeNi as a top layer and 4.5 g L 1 of RGO as a bottomlayer) under 1 and 3 sun, respectively (1 sun = 1 kWm 2). Also, a significant reduction in the salinity (fourorders of magnitude), the electrical conductivity (3000 times) and the pH (1.35 times) of the seawaterwas achieved after 40 min solar desalination. The ratio of produced steam rate per cost was calculatedas 9 cm3 h 1 $ 1 which is compared with other double-layer devices reported in the literature. In addition,W= FeNi4 5RGO4 5 acted as an excellent sorbent for Pb (II).
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Niazi Zohreh,Shafaee Masoomeh,Asarnia Moeid,Goharshadi Elaheh K. 한국화학공학회 2024 Korean Journal of Chemical Engineering Vol.41 No.3
Interfacial solar steam generation (ISSG) off ers a sustainable and environmentally friendly strategy for addressing the energy and water crises. In this study, we fabricated a highly effi cient and cost-eff ective plasmonic photoabsorber for ISSG of seawater by coating silver nanoparticles (Ag NPs) on pinecone (PC). The PC with low thermal conductivity and numerous aligned microchannels for fast water transport, provides suffi cient water supply and reduces the bulk heat loss. In addition, Ag NPs strongly absorb solar radiation through the surface plasmon resonance eff ect. Using Ag/PC under 1 sun (1 kW m –2 ), we achieved an evaporation fl ux and effi ciency of 1.82 kg m –2 h –1 and 100%, respectively. Moreover, Ag/PC removed more than 99% of Na + , K + , Mg 2+ , and Ca 2+ ions from seawater. The plasmonic PC also exhibited excellent cycling during 10 cycles effi ciency of ISSG. Furthermore, treatment of paper industry wastewater with Ag/PC resulted in a signifi cant decrease in the concentration of ions.
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