Figshare最新文献

筛选

英文中文

A Wide-SpectrumnOil/Water Separation Scenario Enhancednby a Chitosan-Based Superwetting Membrane with a Tunable Microstructurenand Powerful Photocatalytic Self-Cleaning Capability 具有可调结构和强大光催化自清洁能力的壳聚糖基超湿膜增强了宽光谱油/水分离场景

Figshare Pub Date : 2024-12-30 DOI: 10.1021/acs.langmuir.4c03882.s001

Hanbing Zhu (20486737), Yi Song (105202), Haowen Qing (20486740), Mengying Liu (2149954), Yanning Zhao (6033701), Mingbo Wu (1465525), Zhaoxuan Feng (6568991)

{"title":"A Wide-SpectrumnOil/Water Separation Scenario Enhancednby a Chitosan-Based Superwetting Membrane with a Tunable Microstructurenand Powerful Photocatalytic Self-Cleaning Capability","authors":"Hanbing Zhu (20486737), Yi Song (105202), Haowen Qing (20486740), Mengying Liu (2149954), Yanning Zhao (6033701), Mingbo Wu (1465525), Zhaoxuan Feng (6568991)","doi":"10.1021/acs.langmuir.4c03882.s001","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c03882.s001","url":null,"abstract":"Oilnspills and industrial oily wastewater pose serious threatsnto the environment. A series of modified membranes with special wettabilitynhave been widely used for separating oil/water mixtures and emulsions.nHowever, these membranes still face challenges such as the detachmentnof the modified coatings and membrane fouling. Here, a freestandingnbiobased superwetting nanofibrous membrane for oil/water mixture separationnwas electrospun with chitosan (CS) and poly(vinyl alcohol) (PVA) asnprecursors, followed by chemical cross-linking and in situ growthnof β-FeOOH nanoparticles on the surface. Moreover, by preciselyncontrolling both the cross-linking time between CS and PVA and thengrowth time of β-FeOOH nanoparticles, the nanosize aperturesnand rough structures on the membrane surface can be regulated towardna wide range of oil/water separation scenarios. As a result, FeOOH@CS/PVA-4–12ndemonstrated superwettability, with a water contact angle of 9.5 ±n3.5° in air and an underwater–oil contact angle aboven140°, achieving a separation efficiency of 98.5% and a waternpermeation flux of 2350 L·m–2·h–1 for n-heptane/water mixtures. The membrane FeOOH@CS/PVA-24–24nexhibited exceptional oil-in-water emulsion separation performancenwith a separation efficiency of up to 99.9% for water/n-heptane emulsions. Additionally, the membrane exhibited remarkablenantifouling properties, attributed to its superwetting surface andnthe photocatalytic ability of β-FeOOH nanoparticles. After fivenphotocatalytic self-cleaning cycles, the water permeation flux andnseparation efficiency remained almost unchanged, demonstrating itsngreat potential for practical application.","PeriodicalId":522186,"journal":{"name":"Figshare","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147893111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0