首页|一种新型可见光响应催化剂改性PATFC膜的制备及其抗污染性能

一种新型可见光响应催化剂改性PATFC膜的制备及其抗污染性能

Preparation of a modified PATFC membrane coated with a novel visible light response catalyst and its anti-pollution properties

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  • 国家科技期刊平台
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以AgI、氧化石墨烯(GO)和超薄g-C3N4(UCN)为前驱体,通过超声结合化学沉淀法合成可见光响应AgI@GO@UCN(AGU)光催化剂,然后采用氮气压滤与界面聚合结合,将AGU负载于支撑基底聚酰胺膜(PATFC膜)表面,得到AGU改性PATFC膜,并对其制备条件及其抗污染性能进行研究.结果表明:改性膜最佳制备条件为:AGU投加量30 mg,间二胺(MPD)水相溶液质量分数1.0‰,MPD浸泡时间2 min,均苯三甲酰氯(TMC)有机相溶液质量分数0.25‰,TMC浸泡时间45 s;在最佳制备条件下,改性膜纯水通量为21.84 L·(m2·h)-1(抽吸压力0.2 MPa),对刚果红(CR)截留率可达97.80％;亲水性能显著改善,水接触角由57.1°(PATFC原膜)降至40.7°(AGU改性膜);可见光吸收性能提高显著,改性膜最大光吸收边带由原膜的387 nm红移至488 nm;改性膜抗污染性能很好,其比通量由PATFC膜的69.54％提升至92.75％;改性膜具有良好的光催化自清洁特性,光照60 min后膜通量恢复率可达95.83％;改性膜稳定性较高,重复利用6次后其通量恢复率仍可达92.35％,对CR截留率为97.29％.
In this study,AgI,graphene oxide(GO)and ultra-thin g-C3N4(UCN)were used as precursors,a type of visible light responsive AgI@GO@UCN(AGU)photocatalyst was synthesized through ultrasonic and chemical precipitation.Then,nitrogen press filtration combined with interfacial polymerization was used to load AGU on the surface of supporting polyamide membrane(PATFC),and AGU modified PATFC membrane was obtained.The preparation process conditions and anti-pollution properties of the modified membrane were studied.The results showed that the optimum preparation conditions were as follows:AGU dosage of 30 mg,MPD aqueous solution mass fraction of 1.0‰,MPD soaking time of 2 min,TMC organic phase solution mass fraction of 0.25‰,TMC soaking time of 45 s;Under the optimal preparation conditions,the pure water flux was 21.84 L·(m2·h)-1(suction pressure 0.2 MPa),and the retention rate of Congo red(CR)could reach 97.80％.The hydrophilicity was significantly improved,and the water contact angle decreased from 57.1°(PATFC)to 40.7°(AGU).The visible light absorption performance of the modified film increased significantly,and the red shift of its maximum absorption side band occurred from 387 nm to 488 nm.The modified membrane had a good anti-pollution performance,and its specific flux increased to 92.75％from 69.54％of PATFC membrane.The modified film had good photocatalytic self-cleaning properties,and the flux recovery rate could reach 95.83％after 60 min illumination.The modified film had a high stability,and its flux recovery rate could reach 92.35％and CR retention rate was still 97.29％after recycling for 6 times.

visible light responsive AgI@GO@UCN(AGU)photocatalystpolyamide thin-film composite membraneanti-pollution performancephotocatalytic self-cleansing properties

李冬梅、吴汉杰、刘小勇、蒋树贤、陈璟恺、林廷翰、张刚毅、陈彦冰

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广东工业大学土木与交通工程学院,广州 510006

广东海洋大学机械工程学院,阳江 524088

华南师范大学计算机学院,广州 510631

AgI@GO@UCN可见光催化剂 PATFC膜 抗污染性能 光催化自清洁特性

国家自然科学面上基金资助项目国家自然科学面上基金资助项目

5137812951108094

2024

10.12030/j.cjee.202310147

环境工程学报
中国科学院生态环境研究中心

环境工程学报

CSTPCD北大核心
影响因子：0.804
ISSN：1673-9108
年,卷(期)：2024.18(3)
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