Materials Engineering Nanotechnology

British scientists have unlocked a game-changing solution to water scarcity by designing a graphene-based filter capable of turning seawater into safe, drinkable water almost instantly. Unlike traditional desalination systems that are expensive and energy-hungry, this lightweight filter uses advanced nanotechnology to remove salt and contaminants at the molecular level—with minimal power requirements. This breakthrough could revolutionize access to clean water in disaster zones, arid regions, and coastal communities where freshwater is scarce. It also opens the door to decentralized water infrastructure, where portable units can deliver clean water on demand without heavy logistics or massive plants.

In a groundbreaking achievement from Germany, scientists have developed a revolutionary graphene-based water filter that turns toxic industrial wastewater into drinkable water within seconds. Using only gravity and a layer of graphene oxide just a few nanometers thick, the filter blocks heavy metals, dyes, and microplastics, allowing only pure water molecules to pass. This invention represents a major leap forward in clean water access, powered entirely by advanced nanotechnology. The key lies in the atomic structure of graphene. The filter has pores designed at the angstrom level, which are precisely sized to reject everything except water molecules. Its surface is hydrophilic, meaning it naturally attracts water without requiring pressure, power, or chemicals. Field tests conducted near a textile factory in Germany proved that even wastewater contaminated with chromium and dye could be instantly purified to meet World Health Organization drinking water standards. Because the system operates on passive flow alone, it is entirely off-grid and highly portable. It can be scaled for use in rural communities, emergency zones, and large industrial sites alike. The membrane is also resistant to fouling, as its electrostatic properties prevent buildup and allow easy restoration with a simple rinse. If implemented on a global scale, this German innovation could deliver safe, affordable water to over two billion people, using cutting-edge science to meet one of the planet’s oldest needs. #water #savetheplanet

#ashishdrishti👀📚🧬 🌞 India’s Sun-Powered Miracle: Clean Water From Dirty Rivers 💧🇮🇳 Imagine a village where the river runs dark with industrial waste… yet every morning, families fill their cups with crystal-clear drinking water—purified not by electricity, not by chemicals, but only by sunlight. ☀️✨ Sounds like science fiction? Indian scientists at IIT Madras just turned it into reality. 🇮🇳🔬 They’ve created a solar-powered water purification system that removes bacteria, viruses, heavy metals, chemicals, AND microplastics—all without electricity, pumps, or disposable filters. Absolutely game-changing for rural communities and crisis zones. 🌍💙 --- 🌟 🌞 The Magic Inside the Machine — Told Like a Story When dirty water enters the device, something extraordinary happens… 1️⃣ The Awakening of Light ☀️🔬 Sunlight hits channels coated with titanium dioxide nanoparticles. These tiny particles wake up like warriors and release high-energy hydroxyl radicals—nature’s own disinfecting swords. They slash through bacteria, viruses, and organic pollutants. ⚔️🦠 2️⃣ The Gate of Purity ⚡🧪 The water then passes through graphene oxide membranes, so thin they’re nearly invisible—yet strong enough to stop heavy metals, chemicals, and microplastics from going any further. It’s like passing through a microscopic security checkpoint. 🚫🧴 3️⃣ The Solar Cauldron 🔥🌡️ Finally, the sun heats the water to 70°C—the pasteurization point—killing anything left behind. No electricity. No moving parts. Only sunlight working as nature’s healer. 🌞❤️ All of this happens with gravity alone. Not a single pump. Not a single watt of power. Pure. Simple. Brilliant. ✨ --- 💰 Cost? Just $40. Output? 10 litres of clean water per hour. Operational cost: ₹0. Lifespan: 5+ years. Maintenance: almost none. Impact: life-changing for 2 billion people without safe water. 🌍 Field tests in rural India show the system producing water that meets WHO drinking water standards, even from polluted rivers carrying industrial runoff. 🏞️💧 The sun that dries our lakes… …is now the sun that can save them. ☀️🌍 --- 🔮 A future question worth asking: If sunlight can now purify the world’s dirtiest water… Could this invention finally end the global water crisis? 💧✨ --- 📚 References 1. IIT Madras – Solar Photocatalytic Water Purification Research (2025) 2. Nature Sustainability – Photocatalysis-Based Water Treatment Systems (2025) 3. World Health Organization – Global Water and Sanitation Data (WHO, 2024) #itsscience ---

OK, over the last 10 years, I published many papers on #amyloids for #water #purification and founded a spinOFF on this technology, but the paper we just published in Nature Water is totally different: specifically we use lysozyme amyloid fibrils to remove #nanoplastics from #water, but instead of relying on passive adsorption or flocculation, we designed magnetically active “nanonets”: amyloid fibrils that host iron oxide nanoparticles and can move, hunt, and capture nanoplastics under an alternating magnetic field. This shift from passive to active capture changes everything: i) We can remove 98–99.9% of a very wide range of nanoplastics  ii) The material is fully recyclable, with >95% efficiency over 100 cycles iii) It works in real water systems (river, lake, seawater) iv) It reduces nanoplastic bioaccumulation in-vivo by ~90% I wish to thank an amazing team that made this possible, stating from Qize Xuan, an outstanding former visiting PhD student in my lab, to continue with Jiangtao Zhou, Mohammad Peydayesh, Tonghui Jin in my lab at ETH Zürich, Damia Barcelo at Universidad de Almería, Prof. Chao Chen and Prof. Hui Liu at Shanghai University and obviously Fabio Pulizzi editor in Chief at Nature Water who handled this manuscript. Here more: https://lnkd.in/eknKq9eH

🧪 Can microalgae-powered nanotechnology remove antibiotics from water? 💚+⚙️ + 💊 = A new direction in water treatment 🔬 The concept Using Chlorella vulgaris extract to synthesize CuO nanoflowers, then coupling them with ZnO to form a p–n heterojunction that enhances charge separation and boosts photocatalytic efficiency. ⚡ Why it stands out ▪ Tunable nanostructures → better control over bandgap & reactivity ▪ Improved electron–hole separation → higher degradation efficiency ▪ Bio-assisted synthesis → low-cost & environmentally friendly 💊 The result? Up to 88% degradation of ciprofloxacin under optimized conditions. 🔁 And it lasts Minimal efficiency loss after multiple cycles → promising for real applications. 💡 What’s interesting here isn’t just the performance… It’s the shift in thinking: We’re no longer just removing pollutants. We’re engineering systems that integrate biology with materials science. #Microalgae #Nanotechnology #WaterTreatment #Photocatalysis #Antibiotics #EnvironmentalEngineering #Sustainability #GreenChemistry #Innovation

Making waves for pure water: from science to the startup.   There is unfortunately no longer any need to emphasize how water scarcity has become a major challenge in today’s world. Across the globe, cohorts of researchers and engineers, in manifold domains, are working tirelessly to advance technologies for desalination and remediation. Membrane science has never been so vibrant.   But there is also room—and a real need—for out-of-the-box ideas. Think differently: this is where basic science can make a splash. In our paper just published in Nature Materials this week, we present a completely new approach to water remediation and desalination, based on a novel idea of a “nanofluidic diode” and driven by (oscillating) electric fields instead of pressure.   The story here began in 2013 with the theoretical idea that one could design osmotic diodes using nanofluidic effects, much like the PN junctions at the heart of electronics. Ten years later, we have transformed this idea into a large-scale proof of concept : we demonstrate that electric driving enables rectified water transport across asymmetric membranes, allowing filtration and desalination with just a few volts of AC voltage. This counterintuitive, yet robust, effect is demonstrated and explained in our Nature Materials paper.   But the story doesn’t end there. We wanted to make this scientific advance available ASAP. So we created Ilion Water Technology, a startup which emerged from our ENS-CNRS laboratory. Under the leadership of Lucie Ries and Zacharie Pilo, Ilion is now developing large-scale technology for water remediation and desalination. And it works… can’t wait for the next steps to spread to technology.    Science is full of surprises. Just make it happen. Ecole normale supérieure CNRS PSL Research University Lucie Ries, PhD Zacharie Pilo  https://lnkd.in/eX6QYDg2

University of Missouri (Mizzou) scientists achieve more than 98% efficiency removing nanoplastics from water. The innovative method — using water-repelling solvents made from natural ingredients — offers a practical solution to the pressing issue of nanoplastic pollution but also paves the way for further research and development in advanced water purification technologies. August 13, 2024. Excerpt: Linked to cardiovascular and respiratory diseases in people, nanoplastics continue to build up, largely unnoticed, in the world’s bodies of water. The challenge remains to develop a cost-effective solution to remove nanoplastics while leaving clean water behind. “Nanoplastics can disrupt aquatic ecosystems and enter the food chain, posing risks to both wildlife and humans,” said Piyuni Ishtaweera, a recent alumna who led the study while earning her doctorate in nano and materials chemistry at Mizzou. “We’re developing better ways to remove contaminants such as nanoplastics from water.” The innovative method — using water-repelling solvents made from natural ingredients — not only offers a practical solution to the pressing issue of nanoplastic pollution but also paves the way for further research and development in advanced water purification technologies. “Our strategy uses a small amount of designer solvent to absorb plastic particles from a large volume of water,” said Gary Baker, an associate professor in Mizzou’s Department of Chemistry and the study’s corresponding author. “Currently, the capacity of these solvents is not well understood. In future work, we aim to determine the maximum capacity of the solvent. Additionally, we will explore methods to recycle the solvents, enabling their reuse multiple times if necessary.” Note: “These solvents are made from safe, non-toxic components, and their ability to repel water prevents additional contamination of water sources, a highly sustainable solution,” she said. “From a scientific perspective, creating effective removal methods fosters innovation in filtration technologies, provides insights into nanomaterial behavior and supports development of informed environmental policies.” The Mizzou team tested five different sizes of polystyrene-based nanoplastics, a common type of plastic used in the making of Styrofoam cups. Their results outperformed previous studies that largely focused on just a single size of plastic particles. Publication: ACS Applied Engineering Materials June 04, 2024 Nanoplastics Extraction from Water by Hydrophobic Deep Eutectic Solvents | ACS Applied Engineering Materials. Piyuni Ishtaweera, Colleen L. Ray, Wyland Filley, Garrett Cobb and Gary A. Baker. https://lnkd.in/e3Km2SiG

Hand-Cranked Nanotech Device Purifies Water in Seconds—No Electricity Required Introduction A research team led by Xu Deng at the University of Electronic Science and Technology of China has unveiled a hand-powered water disinfection device that kills pathogens in seconds using nanoparticles. Designed for disaster zones and off-grid communities, the simple, low-cost system could revolutionize access to safe drinking water where electricity and sunlight are scarce. How It Works Nanoparticle Chemistry: The jar-like device contains spherical silica nanoparticles coated with amine groups (positively charged) and gold nanoparticles (negatively charged). When the handle is cranked, gentle water shear activates these particles, creating reactive oxygen species (ROS) that destroy microbial membranes. Self-Separating System: After stirring, the nanoparticles naturally settle out, allowing users to draw clean, disinfected water directly from the outlet. The same batch of particles can be reused repeatedly, maintaining efficacy across multiple cycles. Performance and Results Tests against 16 major pathogens showed exceptional efficacy: 99.9999% reduction of E. coli in 15 seconds at 50°C. 99.9999% reduction of Vibrio cholerae in 1 minute. Over 95% inactivation of all tested microorganisms, including bacteria, viruses, fungi, and parasites. Once charged, the device offers hours of protection against recontamination. The small amount of gold used makes production cost-effective, with the main expense coming from silica and the plastic housing. Expert Reactions Chiara Neto of the University of Sydney praised the innovation: “It’s very clever, fantastic work—the science and application are impressive.” The researchers acknowledge that the device is still at the proof-of-concept stage, with further work needed to determine its lifespan and total water capacity. Why It Matters This breakthrough combines mechanical simplicity with cutting-edge nanotechnology, offering a portable and sustainable method for rapid water sterilization. In humanitarian crises, remote villages, or regions without power, the device could become a life-saving tool for preventing cholera, dysentery, and other waterborne diseases. Its reusable nature and low material cost make it especially promising for global public health and emergency relief efforts. I share daily insights with 28,000+ followers and 10,000+ professional contacts across defense, tech, and policy. If this topic resonates, I invite you to connect and continue the conversation. Keith King https://lnkd.in/gHPvUttw

In 2008, he studied invisible polymer chains. In 2021, he co-founded a company to turn contaminated water into drinking water using only sunlight. Today, his technology delivers the highest passive solar water-purification rate of any competing method. Meet Rodney Priestley, the Princeton professor whose 'smart sponge' could change how we think about water infrastructure. 💧 His created a solar-powered hydrogel that absorbs contaminated water at room temperature, then releases clean water when heated to just 33°C (91°F) by sunlight. 💧 One square meter can produce over a gallon of clean water in 10 minutes. No electricity. No moving parts. Just smart materials and sun. 💧 Co-founded AquaPao Inc. to scale this technology for off-grid communities worldwide. What I admire most about Professor Rod Priestley: → He solves durability at the molecular level. Most water membranes fail within 2-3 years. Priestley's polymer aging research shows how to engineer materials that last longer, work better, and cost less to maintain. → He designs for real deployment speed. While others focus on lab perfection, Priestley built technology that works in actual field conditions. His hydrogel filters contaminated water from lakes, rivers, and wells without requiring infrastructure. → He bridges fundamental science and urgent need. Through AquaPao and Princeton's innovation ecosystem, he's proving that breakthrough materials science can move from lab to market without waiting decades. Innovation only matters if it reaches the people who need it. I’ve had the opportunity to speak with Rod on multiple occasions in the past and the work from his lab continues to advance material science and water. — Who else is building the bridge between materials science and water access? Tag them below. Would love to hear who’s inspiring you. PS. If you care about the future of water tech, keep an eye on Rodney Priestley’s work — and the next generation of innovators he’s mentoring. #WaterInnovation #SolarPurification #FutureOfWater

Some interesting new #science coming out of Prairie View A&M University using magnetic nanoparticles as recyclable draw solutes for forward osmosis (FO). I've always appreciated FO desalination since the days of collaborating with Asahi Kasei Tiffany Liden and Kevin Schug. I implore Drs. Sunith Madduri and Raghava Kommalapati, PhD, PE, F. ASCE, BCEE to expand this research beyond synthetic produced water to examine the applicability to #Permian brines. This is yet another exciting treatment technology that we will be discussing at the forthcoming Produced Water Society meeting in Midland (August 12-14). "Magnetic nanoparticles (MNPs), especially iron oxide (Fe3O4), display distinctive superparamagnetic characteristics and elevated surface-area-to-volume ratios, facilitating improved physicochemical interactions with solutes and pollutants. These characteristics make MNPs strong contenders for use in water treatment applications. This research investigates the application of iron oxide MNPs synthesized via co-precipitation as innovative draw solutes in forward osmosis (FO) for treating synthetic produced water (SPW). The FO membrane underwent surface modification with sulfobetaine methacrylate (SBMA), a zwitterionic polymer, to increase hydrophilicity, minimize fouling, and elevate water flux. The SBMA functional groups aid in electrostatic repulsion of organic and inorganic contaminants, simultaneously encouraging robust hydration layers that improve water permeability. This adjustment is vital for sustaining consistent flux performance while functioning with MNP-based draw solutions. Material analysis through thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FTIR) verified the MNPs’ thermal stability, consistent morphology, and modified surface chemistry. The FO experiments showed a distinct relationship between MNP concentration and osmotic efficiency. At an MNP dosage of 10 g/L, the peak real-time flux was observed at around 3.5–4.0 L/m2·h. After magnetic regeneration, 7.8 g of retrieved MNPs generated a steady flow of ~2.8 L/m2·h, whereas a subsequent regeneration (4.06 g) resulted in ~1.5 L/m2·h, demonstrating partial preservation of osmotic driving capability. Post-FO draw solutions, after filtration, exhibited total dissolved solids (TDS) measurements that varied from 2.5 mg/L (0 g/L MNP) to 227.1 mg/L (10 g/L MNP), further validating the effective dispersion and solute contribution of MNPs. The TDS of regenerated MNP solutions stayed similar to that of their fresh versions, indicating minimal loss of solute activity during the recycling process. The combined synergistic application of SBMA-modified FO membranes and regenerable MNP draw solutes showcases an effective and sustainable method for treating produced water, providing excellent water recovery, consistent operational stability, and opportunities for cyclic reuse." https://lnkd.in/gsGMZteE