{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T12:59:56Z","timestamp":1790859596684,"version":"4.1.0"},"reference-count":56,"publisher":"Wiley","issue":"55","license":[{"start":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T00:00:00Z","timestamp":1785715200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T00:00:00Z","timestamp":1785715200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/100000928","name":"Welch Foundation","doi-asserted-by":"publisher","award":["F\u20101861"],"award-info":[{"award-number":["F\u20101861"]}],"id":[{"id":"10.13039\/100000928","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["advanced.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Advanced Materials"],"published-print":{"date-parts":[[2026,10]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Net zero emissions will require atmospheric carbon dioxide removal to counterbalance unavoidable emissions while sustaining human life. Moisture\u2010swing direct air capture (DAC) uses humidity for regeneration of a material that absorbs CO\n                    <jats:sub>2<\/jats:sub>\n                    , enabling cyclic operation without large thermal swings or vacuum. However, many reported systems require near\u2010saturated humidification for CO\n                    <jats:sub>2<\/jats:sub>\n                    release, narrowing the passive operating window and increasing water management demands. Here, we present passive diurnal moisture\u2010swing hydrogels (PDMHs) that are regenerated under subsaturated RH conditions, thereby broadening the climatic window for passive CO\n                    <jats:sub>2<\/jats:sub>\n                    capture. Specifically, we develop a quaternized poly(2\u2010(diethylamino)ethyl methacrylate) (PDEAEMA) hydrogel that combines humidity\u2010responsive quaternary ammonium sites with a phase\u2010transition temperature (lower critical solution temperature) that governs hydration behavior. Using air containing 400\u00a0ppm CO\n                    <jats:sub>2<\/jats:sub>\n                    , PDMH achieves a CO\n                    <jats:sub>2<\/jats:sub>\n                    uptake of 1.06\u00a0mmol g\n                    <jats:sup>\u22121<\/jats:sup>\n                    at 40\u00b0C and 30% relative humidity (RH). Humidification at 25\u00b0C enables regeneration efficiencies of 92% at 90% RH and 79% at 80% RH. Under a two\u2010step, 24\u00a0h diurnal protocol, PDMH shows &gt;90% CO\n                    <jats:sub>2<\/jats:sub>\n                    release during desorption and a stable working capacity of 0.97\u20131.05\u00a0mmol g\n                    <jats:sup>\u22121<\/jats:sup>\n                    over 40 cycles. Comparative energy analysis shows that PDMH outperforms the other sorbents evaluated in terms of energy efficiency.\n                  <\/jats:p>","DOI":"10.1002\/adma.74495","type":"journal-article","created":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T14:25:51Z","timestamp":1785767151000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Quaternized Engineered Hydrogels for Subsaturated Moisture\u2010Driven CO\n                    <sub>2<\/sub>\n                    Capture"],"prefix":"10.1002","volume":"38","author":[{"given":"Jungjoon","family":"Park","sequence":"first","affiliation":[{"name":"Materials Science and Engineering Program and Texas Materials Institute The University of Texas at Austin  Austin Texas USA"},{"name":"Walker Department of Mechanical Engineering The University of Texas at Austin  Austin Texas 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USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Keith P.","family":"Johnston","sequence":"additional","affiliation":[{"name":"McKetta Department of Chemical Engineering The University of Texas at Austin  Austin Texas USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3253-0749","authenticated-orcid":false,"given":"Guihua","family":"Yu","sequence":"additional","affiliation":[{"name":"Materials Science and Engineering Program and Texas Materials Institute The University of Texas at Austin  Austin Texas USA"},{"name":"Walker Department of Mechanical Engineering The University of Texas at Austin  Austin Texas USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,8,3]]},"reference":[{"key":"e_1_2_7_2_1","unstructured":"NOAA Global Monitoring Laboratory Trends in CO2 accessed March 2026 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