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High photothermal conversion efficiency of RF sputtered TiO Magneli phase thin films and its linear correlation with light absorption capacity.
Sci Rep
December 2024
Centre Énergie, Matériaux Télécommunications, Institut National de la Recherche Scientifique, 1650, Blvd, Lionel-Boulet, Varennes, QC, J3X-1P7, Canada.
RF-sputtering is used to deposit TiO-Magneli-phase films onto various substrates at deposition temperatures (T) ranging from 25 to 650 °C. Not only the structural, but also electrical conductivity, optical absorbance and photothermal properties of the TiO films are shown to change significantly with T. A T of 500 °C is pointed out as the optimal temperature that yields highly-crystalized pure-TiO-Magneli phase with a densely-packed morphology and a conductivity as high as 740 S/cm.
View Article and Find Full Text PDFAdvanced Bionic 3D Interfacial Solar Steam Generator With One-way Water Supply for Highly Efficient Desalination and Oil-Fouling Prevention.
Adv Sci (Weinh)
December 2024
Institute for Frontier Materials, Deakin University, Geelong, VIC, 3216, Australia.
Interfacial solar steam generation (ISSG) employed for seawater desalination and wastewater purification shows great promise to alleviate global freshwater scarcity. However, simultaneous optimization of water transfer direction in a cost-effective and reliable ISSG to balance thermal localization, salt accumulation, and resistance to oilfouling represents a rare feat. Herein, inspired by seabird beaks for unidirectional water transfer, eco-friendly and cost-effective plant extracts, sodium alginate, and tannic acid, are selected for crafting an innovative Sodium Alginate-Tannic Acid Hemispheric Evaporator (STHE).
View Article and Find Full Text PDFLaser processing materials for photo-to-thermal applications.
Adv Colloid Interface Sci
December 2024
School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, China.
Photothermal conversion materials (PCMs) are crucial component in solar-thermal energy technologies. Although various PCMs with excellent sunlight harvesting have been developed for colorful solar-thermal applications, uniform and large-scale production of PCMs remains a challenge, and the PCMs prepared through the conventional methods are often non-site specific. Laser processing technology (LPT), as an efficient, convenient, green and sustainable technology, can directly create micro/nano structures and patterns at specific locations on materials surface, attracting widespread attention in photo-to-thermal applications.
View Article and Find Full Text PDFEfficient Light to Heat Conversion in SbSe Nanorods and the Role of Macro-channel Imprinted SbSe Loaded Hybrid Membrane for Superior Desalination Performance.
Small
December 2024
Thin Film and NanoScience Laboratory, Department of Physics, Jadavpur University, Kolkata, 700032, India.
Article Synopsis
- The report highlights the efficiency of SbSe nanorods (NRs) in converting light to heat for solar thermal applications, achieving around 57.8% efficiency with specific lasers and heating hybrid membranes to ≈59°C in just 15 minutes.* -
- Despite their advantages, SbSe NRs have a limited evaporation rate due to hydrophobicity, which restricts water movement to the heated areas, leading to less effective solar evaporation.* -
- A new macro-channel imprinting technique improves water transport in these hybrid membranes, boosting evaporation efficiency to ≈148% under strong lighting and achieving effective heavy metal removal from water, meeting WHO standards for safe drinking water.*
Interaction mechanisms between fouling and chemical cleaning on the ageing behavior of ion-exchange membranes during electrodialysis treatment of flue gas desulfurization wastewater.
Water Res
November 2024
Shanghai Engineering Research Center of Energy - Saving in Heat Exchange Systems, College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China. Electronic address:
Article Synopsis
- Chemically irreversible fouling (CIF) and chemical erosion significantly affect the performance and properties of ion-exchange membranes (IEMs) used in desalination, leading to a phenomenon known as membrane ageing.
- The ageing process consists of three stages where desalination rates initially decrease, then increase, and finally decline again, largely influenced by contaminants like anionic polyacrylamide (APAM) and calcium sulfate (CaSO).
- CIF limits cleaning efficiency and alters membrane structure, while chemical erosion damages functional groups and the polymer matrix, affecting key attributes like ion exchange capacity and mechanical strength, thus ultimately influencing the membranes' fouling behaviors.
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