Using seawater, electricity and carbon dioxide (CO2), Northwestern University scientists have developed a new carbon-negative building material.
Category: sustainability – Page 14
New research from Northwestern University has systematically proven that a mild zap of electricity can strengthen a marine coastline for generations—greatly reducing the threat of erosion in the face of climate change and rising sea levels.
In the new study, researchers took inspiration from clams, mussels and other shell-dwelling sea life, which use dissolved minerals in seawater to build their shells.
Similarly, the researchers leveraged the same naturally occurring, dissolved minerals to form a natural cement between sea-soaked grains of sand. But, instead of using metabolic energy like mollusks do, the researchers used electrical energy to spur the chemical reaction.
Global cement manufacturing is responsible for about 8% of the world’s total CO2 emissions – here are four solutions to cut the carbon from concrete.
A new study resulting from a collaboration between King Abdullah University of Science and Technology (KAUST) and King Abdulaziz City for Science and Technology (KACST) shows how nanomaterials can significantly reduce the carbon emissions of LED (light-emitting diode) streetlights. The research team estimates that by adopting this technology, the United States alone can reduce carbon dioxide emissions by more than one million metric tons.
The findings are published in the journal Light: Science & Applications.
The nanomaterial, called nanoPE, enhances the emission of thermal radiation from the surface of the LED to reduce the LED temperature. LEDs generate heat, which raises their temperature and risks damaging the LED electronics and shortening the LED’s lifespan. In fact, approximately 75% of the input energy in LEDs is eventually lost as heat.
A collaborative team of researchers from Imperial College London and Queen Mary University of London has achieved a significant milestone in sustainable energy technology, as detailed in their latest publication in Nature Energy.
The study unveils a pioneering approach to harnessing sunlight for efficient and stable hydrogen production using cost-effective organic materials, potentially transforming the way we generate and store clean energy.
The research tackles a longstanding challenge in the development of solar-to-hydrogen systems: the instability of organic materials such as polymers and small molecules in water and the inefficiencies caused by energy losses at critical interfaces. To address this, the research team introduced a multi-layer device architecture that integrates an organic photoactive layer with a protective graphite sheet functionalized with a nickel-iron catalyst.
As the world increasingly prioritizes sustainable energy solutions, solar power stands out as a leading candidate for clean energy generation. However, traditional solar cells have encountered several challenges, particularly regarding efficiency and stability. But what if there was a better alternative? Imagine a solar cell that is affordable, more stable and highly efficient. Does it sound like science fiction? Not anymore. Meet SrZrSe3 chalcogenide perovskite, a rising star in the world of photovoltaics.
Our research team at the Autonomous University of Querétaro in Mexico has recently unveiled a solar cell crafted from a unique material called SrZrSe3. This novel approach is turning heads in the pursuit of affordable and efficient solar energy.
For the first time, we have successfully integrated advanced inorganic metal sulfide layers, known as hole transport layers (HTLs), with SrZrSe3 using SCAPS-1D simulations. Our work, published in Energy Technology, has significantly raised the power conversion efficiency (PCE) to an impressive rate of more than 27%, marking an advancement in solar technology.
As the global demand for sustainable energy solutions continues to grow, Lithuanian researchers have taken a step forward by developing a technology that not only transforms waste into valuable hydrogen but also eliminates a long-standing issue in gasification—the presence of tar. This new method offers an efficient and eco-friendly way to produce high-purity hydrogen from various waste materials, representing a significant advancement in clean energy production.
Hydrogen is a key element in the transition to cleaner energy. However, conventional gasification methods are often unable to ensure its high purity—synthesis gases contain very low concentrations of hydrogen.
This inefficiency limits the industrial application of hydrogen as a clean gas fuel, highlighting the need for more advanced production methods.
Iodine is a crucial element in various industries, but it is one of the least abundant nonmetallic elements on Earth. Although seawater holds around 70% of the world’s iodine reserves, its low concentrations—approximately 60 ppb—make extraction challenging. Additionally, radioactive iodine, which is released during nuclear accidents, presents significant long-term risks to marine ecosystems and human health. Therefore, there is an urgent need for effective strategies to both extract iodine from seawater and address radioactive iodine pollution.
Now, a team at Hainan University has developed a supramolecular organic framework (SOF) for iodine capture from seawater. This framework has demonstrated the ability to remove 79% of iodine pollution in a simulated contaminated environment. In natural seawater, it achieves an ultrahigh iodine adsorption capacity of 46 mg g−1 within a 20-day extraction period. The research is published in the journal Research.
“The sustainable extraction of iodine from seawater is not only vital to meet the increasing global demand but also essential for mitigating the ecological risks posed by radioactive iodine pollution,” said senior author Ning Wang. “Innovative materials can contribute to the field by enhancing the selectivity and capacity for iodine extraction from seawater. Our findings showcase an effective strategy for fabricating multi-dimensional 3D SOF materials and also present a promising material for iodine capture from seawater.”
