{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T21:01:39Z","timestamp":1792789299450,"version":"4.5.0"},"reference-count":62,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T00:00:00Z","timestamp":1789603200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Natural Science Foundation of the Jiangsu Higher Education Institutions of China","award":["25KJB530005"],"award-info":[{"award-number":["25KJB530005"]}]},{"name":"National Natural Science Foundation of China","award":["52303126"],"award-info":[{"award-number":["52303126"]}],"id":[{"id":"https:\/\/ror.org\/01h0zpd94","id-type":"ROR","asserted-by":"crossref"}]},{"award":["52303126"],"award-info":[{"award-number":["52303126"]}],"id":[{"id":"https:\/\/ror.org\/01h0zpd94","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Zhejiang Provincial Natural Science Foundation of China","award":["ZCLQN25E0303"],"award-info":[{"award-number":["ZCLQN25E0303"]}],"id":[{"id":"https:\/\/ror.org\/04aqat463","id-type":"ROR","asserted-by":"crossref"}]},{"award":["ZCLQN25E0303"],"award-info":[{"award-number":["ZCLQN25E0303"]}],"id":[{"id":"https:\/\/ror.org\/04aqat463","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Shaoxing Basic Public Welfare Research Program","award":["2025A11001"],"award-info":[{"award-number":["2025A11001"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Gels"],"abstract":"<jats:p>Concentrated poly(vinyl alcohol) (PVA) gel-forming networks are characterized by extensive hydrogen bonding, pronounced chain entanglement, and restricted molecular diffusion, which collectively limit oxidant accessibility and impede efficient oxidative transformation. Herein, a \u03b3-Al2O3-supported MnFe2O4 catalyst (FMA) was developed to regulate interfacial redox properties and enhance H2O2 activation, thereby promoting oxidative chain scission of concentrated PVA gel-forming networks. The \u03b3-Al2O3 support effectively suppressed MnFe2O4 aggregation, leading to enhanced specific surface area and increased exposure of accessible Fe\/Mn active sites. Under optimized conditions, the FMA\/H2O2 system achieved approximately 90% PVA conversion within 120 min, together with 89.2% TOC removal and a decrease in molecular weight from 68,892 to 2063 Da, demonstrating efficient oxidative chain scission and deep mineralization. Mechanistic investigations using XPS, EPR, and radical-quenching experiments revealed that synergistic Fe\/Mn redox cycling promoted H2O2 activation and hydroxyl radical generation, which dominated PVA chain cleavage. The catalyst exhibited excellent stability with limited metal leaching during repeated cycles. This work demonstrates that \u03b3-Al2O3-mediated interfacial regulation provides an effective strategy for designing supported metal oxide catalysts toward controlled transformation of highly entangled gel-related polymer networks, providing insights into the oxidative deconstruction of PVA-based gel and hydrogel systems.<\/jats:p>","DOI":"10.3390\/gels12090848","type":"journal-article","created":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T11:41:35Z","timestamp":1789645295000},"page":"848","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Interfacial Redox Regulation of \u03b3-Al2O3-Supported MnFe2O4 for Oxidative Chain Scission in Concentrated Poly(vinyl alcohol) Gel-Forming Networks"],"prefix":"10.3390","volume":"12","author":[{"given":"Zhong","family":"Pan","sequence":"first","affiliation":[{"name":"School of Textile and Clothing, Nantong University, Nantong 226019, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qilong","family":"Sun","sequence":"additional","affiliation":[{"name":"School of Textile and Clothing, Nantong University, Nantong 226019, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiuyu","family":"Shen","sequence":"additional","affiliation":[{"name":"School of Textile Science and Engineering, Shaoxing University, Shaoxing 312000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanyan","family":"Li","sequence":"additional","affiliation":[{"name":"College of Material and Textile Engineering, Jiaxing University, Jiaxing 314001, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoyun","family":"Long","sequence":"additional","affiliation":[{"name":"School of Textile and Clothing, Nantong University, Nantong 226019, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-8687-7850","authenticated-orcid":false,"given":"Shuang","family":"Zhai","sequence":"additional","affiliation":[{"name":"School of Textile and Clothing, Nantong University, Nantong 226019, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,9,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"160","DOI":"10.1089\/ees.2015.0327","article-title":"Pretreatment of Polyvinyl Alcohol-Containing Desizing Wastewater by the Fenton Process: Oxidation and Coagulation","volume":"33","author":"Guo","year":"2016","journal-title":"Environ. 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