Lifeboat Foundation

Prof. Zhang Tao’s group at the Ningbo Institute of Materials Technology and Engineering (NIMTE) of the Chinese Academy of Sciences (CAS), in collaboration with Prof. Hou Yang from Zhejiang University and Prof. Xiao Jianping from the Dalian Institute of Chemical Physics of CAS, proposed a novel two-dimensional (2D) nanoconfinement strategy to strongly enhance the oxygen evolution reaction (OER) activity of low-conductivity metal-organic frameworks (MOFs). Results were published in Nature Communications.

The development of high-efficiency electrocatalysts for the electrochemical conversion of water to generate environmentally friendly and sustainable hydrogen energy has drawn tremendous attention for decades.

Despite the crucial role the OER plays in water splitting, OER at the anode requires a relatively high thermodynamic potential to accelerate water splitting kinetics. Thanks to the large surface area, tunable porosity, diverse compositions and metal centers, MOFs have emerged as promising candidates for efficient OER electrocatalysts. However, the intrinsically poor conductivity of the most MOFs seriously impede their catalytic activity.

“Dicamba drift”—the movement of the herbicide dicamba off crops through the atmosphere—can result in unintentional damage to neighboring plants. To prevent dicamba drift, other chemicals, typically amines, are mixed with dicamba to “lock” it in place and prevent it from volatilizing, or turning into a vapor that more easily moves in the atmosphere.

Now, new research from the lab of Kimberly Parker, an assistant professor of energy, environmental and chemical engineering at Washington University in St. Louis’ McKelvey School of Engineering, has shed new light on this story by demonstrating for the first time that these amines themselves volatilize, often more than dicamba itself.

Their findings were published Sept. 23 in the journal Environmental Science and Technology.

It’s illegal to use the carcinogenic color additive Red 3 in cosmetics, such as lipsticks or blush, or externally applied drugs. Yet the discredited chemical is lurking in common varieties of candy corn, Nerds, Peeps, Pez, SweeTarts, and hundreds of candies, cakes, and other foods, including dozens of seasonal Halloween items. That’s why the Center for Science in the Public Interest and 23 other organizations and prominent scientists are today urging the Food and Drug Administration to formally remove Red 3 from the list of approved color additives in foods, dietary supplements, and oral medicines.

Since the early 1980s FDA had evidence that Red 3 caused cancer in laboratory animals. The National Toxicology Program considered the evidence “convincing.” As a result, in 1990, the agency eliminated certain “provisionally listed” uses of the chemical—meaning cosmetics and externally applied drugs. In 1990, FDA also said it would “take steps” to ban its use in foods, ingested drugs, and supplements. But those steps were never taken.

“Halloween has never been the healthiest holiday, but few parents would believe that the FDA permits the use of a dye it acknowledges as a carcinogen to be used as a common ingredient in candy,” said CSPI consultant Lisa Y. Lefferts. “Fewer still would believe that the FDA prohibits this carcinogen in makeup but allows it in food.”

DOW will install advanced nuclear reactors at one of its Gulf Coast sites to provide low carbon power and process heat for its chemicals production.

Dow signed a letter of intent with reactor developer X-energy, and plans to buy a minority stake in the company. The plan is to deploy X-energy’s Xe-100 high-temperature gas-cooled reactor technology at one of Dow’s Gulf Coast complexes, with operations expected to begin by 2030.

“Advanced small modular nuclear technology is going to be a critical tool for Dow’s path to zero-carbon emissions,” said Dow CEO Jim Fitterling. “This is a great opportunity for Dow to lead our industry in carbon neutral manufacturing by deploying next-generation nuclear energy.”

Providing highly efficient chemical processes that are also sustainable has become a key requirement for customers of the chemicals sector. While this is easier to achieve in large-scale, continuous processes for portfolio products, reaching similar levels of sustainability in multi-stage syntheses of complex, custom-manufactured molecules remains a challenge.

One solution to this problem is hydrogenation. When operated properly and with the appropriate knowledge and expertise, this technology is able to deliver excellent yields at high selectivity, and the catalysts applied in the process can often be re-used or recycled.

The findings could help pave the way for greater use of machine learning in materials science, a field that still relies heavily on laboratory experimentation. Also, the technique of using machine learning to make predictions that are then checked in the lab could be adapted for discovery in other fields, such as chemistry and physics, say experts in materials science.

To understand why it’s a significant development, it’s worth looking at the traditional way new compounds are usually created, says Michael Titus, an assistant professor of materials engineering at Purdue University, who was not involved in the research. The process of tinkering in the lab is painstaking and inefficient.

Researchers from Northwestern University have made a significant advance in the way they produce exotic open-framework superlattices made of hollow metal nanoparticles.

Using tiny hollow particles termed metallic nanoframes and modifying them with appropriate sequences of DNA, the team found they could synthesize open-channel superlattices with pores ranging from 10 to 1,000 nanometers in size—sizes that have been difficult to access until now. This newfound control over porosity will enable researchers to use these colloidal crystals in molecular absorption and storage, separations, chemical sensing, catalysis and many optical applications.

The new study identifies 12 unique porous nanoparticle superlattices with control over symmetry, geometry and pore connectivity to highlight the generalizability of new design rules as a route to making novel materials.

Scientists have shown that they can detect SARS-CoV-2, the virus that causes COVID-19, in the air by using a nanotechnology-packed bubble that spills its chemical contents like a broken piñata when encountering the virus.

Such a detector could be positioned on a wall or ceiling, or in an air duct, where there’s constant air movement, to alert occupants immediately when even a trace level of the virus is present.

Continue reading “COVID-causing virus in air detected with high-tech bubbles” »

Carbenes are among the most adaptable building blocks in organic chemistry, but they may also be dangerously hot. Due to their explosivity in the lab, scientists often avoid using these very reactive molecules.

However, in a new study that was just published in the journal Science, researchers from The Ohio State University describe a new, safer method to turn these short-lived, high-energy molecules into much more stable ones.

“Carbenes have an incredible amount of energy in them,” said David Nagib, co-author of the study and a professor of chemistry and biochemistry at Ohio State. “The value of that is they can do chemistry that you just cannot do any other way.”