Scientists have designed lampshades that convert indoor air pollutants into benign substances using waste heat from light bulbs, with plans to adapt this technology for LEDs. Indoor air pollution may have met its match. Scientists report that they have designed catalyst-coated lampshades that tra
A lampshade coated with a catalyst uses heat from an incandescent bulb to destroy indoor air pollution. Credit: Minhyung Lee
Indoor air pollution may have met its match. Scientists report that they have designed catalyst-coated lampshades that transform indoor air pollutants into harmless compounds. The lampshades work with halogen and incandescent light bulbs, and the team is extending the technology so it will also be compatible with LEDs.The researchers presented their results at the fall meeting of the American Chemical Society . ACS Fall 2023 featured about 12,000 presentations on a wide range of science topics.
“Conventional methods to remove VOCs from indoor air rely on activated carbon or other types of filters, which have to be replaced periodically,” says Minhyung Lee, a graduate student in Kim’s lab at. Lee will present the team’s work at the ACS meeting. Other devices have been developed that break down VOCs with the help of thermocatalysts activated by high temperatures or with photocatalysts, which respond to light.
“This was the first demonstration to utilize waste heat from lamp sources,” Kim says. Most previous research projects, and even a couple of lamps on the market, have instead relied on light-activated photocatalysts to destroy indoor air pollution.Recently, Kim’s team has been exploring less expensive substitutes for platinum. The team has already shown that these new iron- or copper-based catalysts can break down VOCs.
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