homehome Home chatchat Notifications


Sunlight could turn CO2 into useful, everyday products

A computational model found that UV light can kickstart the reduction of CO2, which can then be converted into useful products like drugs, polymers, and even furniture.

Tibi Puiu
October 10, 2022 @ 4:25 pm

share Share

Credit: Pixabay.

The accumulation of CO2 in the atmosphere is arguably humanity’s biggest challenge of the current century. Already, average global temperatures are nearly 1.5°C higher compared to the pre-industrial era. This is why transitioning to a society powered by 100% renewable energy should be a top priority for all stakeholders — but that might not be enough.

One of the reasons why CO2 accumulation is so menacing and tricky to solve is the fact that the greenhouse gas is notoriously difficult to reduce. This means that even by some miracle all fossil fuels were to disappear overnight, CO2 emitted yesterday can remain stable and warm the atmosphere for decades, perhaps centuries to come.

This vexing problem got Shaama Sharada, assistant professor at the University of Southern California, and colleague Kareesa Kron motivated to find a sustainable solution. In a first-of-its-kind computational study, the pair of researchers have found a chemical pathway that can convert CO2 into other molecules to produce useful materials, such as fuels and consumer products ranging from pharmaceuticals to even sustainable furniture.

The theoretical model that the researchers devised suggests that stimulating oligophenylene, an organic molecule, with ultraviolet (UV) light can turn it into a negatively charged anion. This would instantly shift electrons to the closest molecule, which can conveniently be CO2, making the greenhouse gas reactive and capable of being reduced and turned into different useful materials.

Professor Shaama Mallikarjun Sharada (left) and Kareesa Kron. Image Credit: Viterbi School of Engineering, University of Southern California.

Typically, breaking down CO2 requires a lot of energy, which is just not economically feasible. However, the researchers believe UV rays from natural sunlight is enough to excite the catalyst molecule and kickstart the reduction of CO2.

“CO2 is notoriously hard to reduce, which is why it lives for decades in the atmosphere,” Sharada said. “But this negatively charged anion is capable of reducing even something as stable as CO2, which is why it’s promising and why we are studying it.”

“Most other ways to do this involve using metal-based chemicals, and those metals are rare earth metals,” said Sharada. “They can be expensive, they are hard to find and they can potentially be toxic.”

That being said, the method presented in the new paper is not without its own challenges and shortcomings. For instance, exciting the catalyst solely with sunlight can also be tricky, which is something that Sharada and colleagues are currently working on using quantum chemistry. Writing in The Journal of Physical Chemistry A, the authors claim systematic modifications to the oligophenylene catalyst meant to push electrons toward the center of the catalyst can speed up the reaction even further.

“One of those challenges is that, yes, they can harness radiation, but very little of it is in the visible region, where you can shine light on it in order for the reaction to occur,” said Sharada. “Typically, you need a UV lamp to make it happen.”

share Share

New research shows how Trump uses "strategic victimhood" to justify his politics

How victimhood rhetoric helped Donald Trump justify a sweeping global trade war

Biggest Modern Excavation in Tower of London Unearths the Stories of the Forgotten Inhabitants

As the dig deeper under the Tower of London they are unearthing as much history as stone.

Millions Of Users Are Turning To AI Jesus For Guidance And Experts Warn It Could Be Dangerous

AI chatbots posing as Jesus raise questions about profit, theology, and manipulation.

Can Giant Airbags Make Plane Crashes Survivable? Two Engineers Think So

Two young inventors designed an AI-powered system to cocoon planes before impact.

First Food to Boost Immunity: Why Blueberries Could Be Your Baby’s Best First Bite

Blueberries have the potential to give a sweet head start to your baby’s gut and immunity.

Ice Age People Used 32 Repeating Symbols in Caves Across the World. They May Reveal the First Steps Toward Writing

These simple dots and zigzags from 40,000 years ago may have been the world’s first symbols.

NASA Found Signs That Dwarf Planet Ceres May Have Once Supported Life

In its youth, the dwarf planet Ceres may have brewed a chemical banquet beneath its icy crust.

Nudists Are Furious Over Elon Musk's Plan to Expand SpaceX Launches in Florida -- And They're Fighting Back

A legal nude beach in Florida may become the latest casualty of the space race

A Pig Kidney Transplant Saved This Man's Life — And Now the FDA Is Betting It Could Save Thousands More

A New Hampshire man no longer needs dialysis thanks to a gene-edited pig kidney.

The Earliest Titanium Dental Implants From the 1980s Are Still Working Nearly 40 Years Later

Longest implant study shows titanium roots still going strong decades later.