SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Guowei Shan,Xiao Xiao,Hong Gao,Qi Zhang,Houyi Peng,Weixing Li
Heavy metal ion (HMI)-contaminated wastewater is a great threat to public health. Membrane separation is an efficient and green technology for HMI removal. Here, the strategy of nanoparticle in-situ growth combined with molecule grafting was proposed to fabricate the UiO-66-NH 2 -g-DTPA/PES composite membrane. The UiO-66-NH 2 nanoparticles bound within the PES membrane substrate uniformly brought a significant number of primary amino groups, providing abundant graft sites for DTPA molecule. Numerous carboxyl groups and tertiary amine groups were introduced as the result of DTPA grafting, enabling the formation of M−DTPA complexes with HMIs. The fabricated UiO-66-NH 2 -g-DTPA/PES membranes exhibited excellent performances. The pure water flux arrived at 6208 L·m −2 ·h −1 and the efficiencies of removing Cu 2+ , Pb 2+ , Cr 3+ and Cd 2+ were 99.73%, 99.79%, 96.91% and 98.33%, respectively. Moreover, the UiO-66-NH 2 -g-DTPA/PES membrane also showed a remarkable stability in pH conditions ranging from 3 to 10 and remained a relatively high performance in the cyclic test.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2022
·
IF 7.34
JongNam Choe,JongMin Ji,MyongBok Kim,JuHyon Yu,JongYol Ri,KyongSu Ri,HyonIl Kim
In this paper, a novel hydrophilic composite polyethersulfone (PES) ultrafiltration membrane was prepared by blending sunlight response photocatalyst NH 2 -MIL-125 via the phase inversion method. The physical-chemistry performance of membrane was carried out by XRD, FTIR, UV-VIS/DRS, contact angle, and cross-section SEM images. The separation ability, anti-fouling ability, and self-cleaning efficiency of ultrafiltration membrane were analyzed by ultrafiltration experiment using the congo red solution. The results indicate that fouling resistance and the flux recovery ratio of ultrafiltration membrane is significantly improved, and it has higher solar response energy. There was no significant change in the rejection ratio of pollutants before and after illumination. For the pristine PES membrane and the 0.5% NH 2 -MIL-125/PES nanocomposite membrane, the water flux recovery ratio (FRR) could increase from 37.84% to 77.09%, and the R r could increase from 22.22% to 44.09%, and the R ir could decrease from 67.11% to 47.09%. In a conclusion, the addition of NH 2 -MIL-125 at a low concentration could result in membranes with more pure water flux, better rejection, and good fouling resistance compared to the unfilled PES membrane.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Guolong Lu,Hao Cui,Xiaohui Weng,Youhong Sun,Zhiyong Chang
Methane detection is important for exploring combustible ice in energy field. As the core component of the methane sensor, gas-liquid separation membranes play a crucial role in separating methane from water, which can effectively enhance the timeliness and stability of methane detection. Moreover, the correlative permeability and mechanical properties of are contradictory requirements for achieving optimum performance of membranes. Herein, a methane-water separation membrane was developed and optimized by adjusting the PEG as porogen based on PDMS and PES as functional and support layers, respectively. PDMS/PES composite membrane performed an excellent methane permeability and tensile strength . Particularly, the PEG was studied as porogen to affect the morphology and adjust pore structure of the PES layer. Considering the trade-off of methane permeability and mechanical properties , the results indicate the appropriate content of porogen is 4 wt% PEG. This work optimizes a new approach to prepare methane-water separation membrane and give a significant insight to develop methane detection for exploring new energy in seabed.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Ruiqi Li,Wenhang Chen,Junqing Li,Chunhong Zhang,Yueling Sun,XiaoYan Tang,Yuan Liu
Membrane separation technology offers a sustainable and efficient solution to wastewater management; however, membrane fouling significantly impedes its application. Photocatalytic membranes, integrating photocatalytic and membrane separation technologies, enhance membrane separation efficacy while effectively mitigating organic and biological contaminations. In this work, Ag2S/PANI@PES composite membranes were prepared via a facile in situ polymerization and successive layer adsorption technique. The modified poly(ether sulfone) (PES) membrane demonstrated improved hydrophilicity and separation performance, and its heterostructure between polyaniline (PANI), Ag0, and Ag2S effectively addressed organic fouling issues. Moreover, Ag2S/PANI@PES exhibited outstanding antimicrobial properties, as well as chemical and mechanical stability.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Jinyang Liu,Qiqi Liao,Chengcai Li,Xueliang Jiang,Jiuming Li,Wangyong Jin,Guojin Liu,Yuhai Guo,Bin Yu,Hailin Zhu
Being a low-energy, reusable, and environmentally friendly degradation technology, photocatalysis has excellent application prospects in textile dye wastewater degradation. In this study, we combine the advantages of photocatalysis and membrane technology to prepare photocatalytic membranes that immobilize the photocatalyst and alleviate membrane pollution. Dual-precursor graphitic carbon nitride (U6M1) was composited with Bi 12 TiO 20 (BTO) using the annealing method to prepare a novel Δ(Z + II)-type BTO/U6M1 photocatalyst with visible-light response capacity. Subsequently, BTO/U6M1/PES composite photocatalytic membranes were fabricated using the nonsolvent-induced phase separation (NIPS) method, and the photodegradation activity of the composite membranes was executed against rhodamine B (RhB) dye. The results indicated that the composite membrane exhibiting the best photocatalytic performance achieved nearly 100 % degradation of RhB within 120 min. Furthermore, the membrane with optimal photocatalytic performance retained photocatalytic activity for five consecutive dye degradation tests, demonstrating its reusability.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2024
·
IF 5.9
Jinyang Liu,Chengcai Li,Qiqi Liao,Guojin Liu,Hailin Zhu,Yuhai Guo
Photocatalytic membranes are the most effective solution for dye wastewater treatment and membrane pollution reduction, among them, how to improve the visible light responsiveness of photocatalytic membranes is the focus of research in this direction. In this paper, a novel Δ(Z + II)-type photocatalyst with visible light responsiveness was prepared using YVO 4 -modified dual-precursorgraphitic carbon nitride (U6M1). The Nonsolvent Induce Phase Separation (NIPS) was used to create the YVO 4 /U6M1/PES membrane, which gave the membrane photocatalytic capacity. The efficiency of removing rhodamine B(RhB) reached 99 % within 120 min, and the separation efficiency of Acid Red 18(AR-18) reached 95.1 % within 150 min. In addition, the membrane also has certain self-cleaning capabilities and can maintain a separation efficiency of more than 89 % after 5 cycles. As a green material, the composite membrane loaded with YVO 4 /U6M1 photocatalyst has great potential in the practical application of dye wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zhengda Lin,Yijun Liu,Zhongming Zhang,Jie Yao
In this study we used a high-temperature steam-induced hydrolysis method to obtain a fluorinated OH/SiO 2 -TiO 2 /polyethersulfone (PES) composite hollow fiber membrane for CO 2 capture. The purpose of grafting SiO 2 and TiO 2 on the surface of PES by hydrolyzing silicon precursors and titanium precursors at high temperature, is to improve the alkali corrosion resistance and hydrophobicity of the PES membrane. The OH/SiO 2 -TiO 2 /PES composite hollow fiber membranes prepared by the high-temperature steam-induced hydrolysis method and the graft coating method were measured by SEM, EDS , FTIR, WCA, AFM , XRD and XPS in order to characterize the morphology and structure of the prepared membranes. In the CO 2 /CH 4 separation performance test experiment, the OH/SiO 2 -TiO 2 /PES membrane prepared by the high-temperature steam hydrolysis method showed better separation performance than the original PES membrane. The effects of absorbent flow rate, absorbent concentration and feed gas flow rate on CO 2 flux and CO 2 /CH 4 were selectivity investigated. When the flow rate of the absorbent (DEA) reached 16 L/h, the flow rate of the feed gas (CO 2 /CH 4 = 40 : 60) was 30 ml/min, the concentration of the absorbent was 1 mol/L, The CH 4 concentration was 99.88 % and the optimal separation factor was as high as 554.89. In general, the results obtained in this work may provide promising insights into the use of fluorinated OH/SiO 2 -TiO 2 /PES composite membranes for carbon capture and CO 2 /CH 4 separation in GLMC application.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Shuang Zheng,Shujuan Yang,Zhaofeng Ouyang,Tianya Chen,Yong Kuang,Haixing Shen,Fei Yang,Yong Zhang
To obtain ultrafiltration (UF) membranes with excellent separation performances and antifouling properties, regenerated cellulose (RC) membranes with intrinsic hydrophilicity and dense structures immensely attract the attention of researchers. Herein, a novel modified RC membrane, which has high water permeability and antifouling capability, is prepared using cellulose acetate (CA) via non-solvent induced phase separation (NIPS) and green hydrolysis technology . The as-prepared membranes were investigated comprehensively by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) analyses and protein adsorption, etc. As a result, the RC membranes showed higher hydrophilicity (WCA=25.95°), thus they possessed a lower protein adsorption value of 1.9 ± 0.1 μg/cm 2 . The filtration performances were evaluated by bovine serum albumin (BSA) and endotoxin separation with dead-end filtration system. The results exhibited greater selectivity of RC membranes that BSA rejection over 98% and endotoxin remove below 0.25 EU/mL, and excellent anti-fouling properties that the flux recovery rate (FRR) over 95% and even as high as 100%. Simultaneously, the common polyethersulfone (PES) composite membranes were prepared via NIPS technology, and comprehensively compared with RC membranes to provide a theoretical basis for the practical application of RC membranes in pharmaceutical and biotechnological industries.
研究领域:
膜科学
·
材料科学
·
生物技术
·
制药工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）