ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Zhenping Liu,Haiyun Zhai,Zuanguang Chen,Qing Zhou,Zhixian Liang,Zihao Su
A novel Fe 2 O 3 nano-materials/oxygen functionalized multi-walled carbon nanotubes/triton X-100 modified carbon paste electrode (Fe 2 O 3 /MWCNTs-COOH/OP/CPE) was prepared to simultaneously detect orange G (Or G) and orange II (Or II) by electrochemical methods. Compared with the bare carbon paste electrode (CPE), Fe 2 O 3 /MWCNTs-COOH/OP/CPE exhibited obvious electrocatalytic activities towards Or G and Or II. Furthermore, the two azo dyes were identified and separated successfully, and were simultaneously determined by the redox peaks in cyclic voltammograms (CVs) and differential pulse voltammogram (DPV) under optimum conditions. In DPV, anodic peak current (Ipa) and concentrations were linearly related well for 0.1-20.0 μM Or G and 0.2-50.0 μM Or II. The limits of detection (S/N = 3) of Or G and Or II were 0.05 μM and 0.1 μM, respectively. Therefore, the electrode is suitable for the determination of Or G and Or II in industrial wastewater due to high sensitivity and selectivity, low detection limit, good reproducibility, as well as easy preparation and regeneration.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2022
·
IF 5.141
Qianshu Xia,Yun Hao,Suimin Deng,Lina Yang,Ruoxin Wang,Xiangfeng Wang,Yuan Liu,Hailing Liu,Mengxia Xie
s Water pollution induced by the productive process of organic dyes would lead to various diseases, and so treatment of the wastewater is an urgent task for protecting human health and ecological environment. In this work, visible light responsive heterojunction material based on silver iodide and carbon dots (CDs) doped ZIF-8 metal organic frameworks ( [email protected] @AgI) has been prepared by a green solvent-free strategy and in-situ ion deposition method. The [email protected] @AgI composites have high photocatalytic performance for degradation of acridine orange (AO) dye under visible light, and the maximum degradation percentage can reach to 96.0%, which was estimated by the UV–visible spectroscopy. The porous structure and large surface area of the photocatalyst were favorable to absorption of the target dye on the catalyst, which can promote the kinetic degradation rate for low level concentration of the dye. The introduction of CDs into the AgI heterojunction can improve the electron transport efficiency and visible light absorption capacity, and thus significantly enhancing the photocatalytic activity of the catalyst. The photocatalytic mechanism was proposed as indirect Z-scheme heterojunction type based on the energy band structure of the catalyst. This work provides a visible light photocatalyst for removal of the AO dye in wastewater and offers a promising strategy for developing photocatalyst for treatment of organic pollutants in the environment using solar energy.
研究领域:
环境科学
·
材料科学
·
化学工程
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Hui Huang,Bin Huang,Yichun Huang,Jinbei Yang,Yinnv Ye,Yucheng Chen
Attractive environmentally friendly magnetic metal-organic framework (MOF) nanocomposite GO@Fe 3 O 4 -COOH@NH 2 -MIL-101(Fe) was synthesized by a solvothermal method and characterized by X-ray diffraction, Fourier transform infrared, scanning electron microscopy, Brunauer– Emmett–Teller, and vibrating sample magnetometer, and used as an effective adsorbent for the removal of orange G from aqueous solution. The various operating parameters that effect the adsorption process, such as adsorbent dosage (0.01–0.2 g), pH (1.0–10.0), initial concentration (50–400 mg L –1 ), and temperature (298.15–318.15 K) were studied. The percent removal of orange G increases with the increment of the adsorbent dosage and decrease of the initial concentration, and the optimum pH is 6.0. The Redlich–Peterson model can be favorably applied to describe the adsorption equilibrium data, indicating that the surfaces of GO@Fe 3 O 4 -COOH@NH 2 -MIL-101(Fe) nanocomposite for the orange G adsorption are made up of homogeneous adsorption patches. The adsorption kinetics indicate that the adsorption process of GO@Fe 3 O 4 -COOH@NH 2 -MIL-101(Fe) toward orange G obeys the pseudo-second-order model and the activation energy is 16.5 kJ mol –1 . Thermodynamic parameters, ΔH = 39.81 kJ mol –1 , ΔS = –46.80 J mol –1 K –1 , and ΔG < 0, exhibit that the adsorption is exothermic and spontaneous. The maximum adsorption capacity of orange G onto GO@Fe 3 O 4 -COOH@NH 2 -MIL-101(Fe) nanocomposite is 128.8 mg g –1 . Therefore, magnetic GO@ Fe 3 O 4 -COOH@NH 2 -MIL-101(Fe) nanocomposite can be employed as an environmentally friendly and efficient adsorbent for the orange G removal from wastewater.
研究领域:
环境科学
·
纳米技术
·
材料科学
·
化学工程
·
水处理
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Qiankun Wu,Lichao Xia,Cunxian Lai,Wentian Zhang,Houlong Yang,Fangang Meng,Shanshan Zhao
Two-dimensional (2D) lamellar membranes exhibit great potential for efficient dye/salt separation, owing to their tunable interlayer channel structures and excellent molecular sieving selectivity. However, irregular stacking of 2D nanosheets and weak interlayer interactions often induce membrane swelling in aqueous environments, severely limiting their practical application prospects. In this study, a MXene composite membrane with structural stability, regular stacking, and outstanding permeability and selectivity was fabricated by incorporating zero-dimensional (0D) partially aminated graphene quantum dots (NGQDs) into MXene nanosheets. The experimental results demonstrate that 0D NGQDs can stably bind to MXene nanosheets via non-covalent interactions and disperse uniformly. The exposed amino groups on GQDs not only optimized the stacking structure of MXene layers but also enhanced interlayer forces by providing specific binding sites, thereby effectively alleviating the aqueous swelling issue of MXene membranes. The optimized composite membrane exhibited excellent rejection of Congo Red (CR) (>99 %), remarkable dye/salt separation efficiency, and long-term operational stability. Specifically, the separation factors for CR/NaCl and CR/Na 2 SO 4 mixed solutions reached 697 and 740, respectively, outperforming most 2D lamellar membranes and nanofiltration membranes reported in literature. This work provides valuable insights for the development and application of high-performance 2D lamellar membranes.
研究领域:
材料科学
·
膜技术
·
纳米技术
·
分离科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Dan Yang,Bo Wu,Ning Yu,Ruohui Zhang,Wenqi Liu,Hao Liu,Wenjing Li,Yunxia Hu,Shao-Lu Li
Organic solvent nanofiltration (OSN) is a pivotal green technology for molecular separations in pharmaceuticals and fine chemicals, offering precision and efficiency. However, its broader application is hindered by the persistent trade-off between membrane permeability and selectivity. Herein, we address this challenge through the rational design of a novel rigid and muti-functional tetra-amine monomer, 2,2′,4,4′-tetraaminobiphenyl (BIPDA), which was employed in interfacial polymerization with trimesoyl chloride (TMC) to fabricate an ultrathin polyamide nanofilm. The unique rigid geometry and muti-functionality of BIPDA monomer yielded an ultrathin (25.5 ± 1.3 nm), microporous selective layer, which conferred the membrane with a high methanol permeance of 10.4 ± 0.4 L m −2 h −1 bar −1 and a 317 Da MWCO, outperforming most polymeric OSN benchmarks. It also demonstrated precise charge-based molecular separation, near completely rejecting Methyl Orange while permitting the passage of Methylene Blue. Furthermore, it maintained >95 % rejection for the selected four pharmaceuticals and meanwhile showed excellent operational stability. In a practical demonstration, the membrane efficiently concentrated the tetracycline solution sevenfold within 6 h. This work successfully validates a bottom-up molecular design strategy to decouple the permeability-selectivity trade-off issue, thereby providing valuable insights for developing advanced membranes for pharmaceutical concentration and molecular separations.
研究领域:
材料科学
·
膜技术
·
化学工程
·
分离科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Xinda You,Zifan Song,Youqing Tian,Ran Chen,Yuxiang Wu,Meijie Wang,Dai Shi,Shan Luo,Jiamei Sun,Yuanhui Xiao,Haixiong Liu,Hanyang Liu,Beili Lu,Lirong Tang,Xingzhong Cao,Jiande Lin,Biao Huang
Molecular separations that purify and recovery waste solvents are essential to sustainable chemical industries. Solvent-resistant nanoporous cellulose membranes (CMs) hold great promise in organic separations, yet their pore engineering is hindered by extensive hydrogen bonding among hydroxyl groups of cellulose chains, thus restricting structural regulation for precise separations. Herein, we reported coordination-reconstructed cellulose membranes (CRCMs) by partially replacing hydrogen bonds with metal-organic coordination. Immersing CMs in alkaline cupric solution disrupts the hydrogen bonds among hydroxyl groups and establish hydroxyl-Cu 2+ linkages in cellulose networks. Altering Cu 2+ content in CRCMs enables precise tuning of pore size, generating superior permselectivity over current cellulose-based membranes. Cu 2+ coordination also enhances intrachain binding, which elevates the mechanical strength with nearly ten-fold increased swelling resistance of CRCMs, therefore harvesting pressure resistance up to 20 bar in ethanol. The optimized CRCM maintains stable permselectivity for over 2800 min and achieves solute rejection up to 99.9 % for multicomponent organic mixtures, demonstrating superior durability and adaptability for complicated organics separations. Our coordination-driven reconstruction approach may open new avenues for engineering biomass-based molecular-separation membranes.
研究领域:
材料科学
·
高分子化学
·
膜分离技术
·
可持续化学
·
纳米多孔材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Bingbing Chen,Huaixiang Lv,Sheng Guo,Rong Chen,Fengxi Chen
PAO-Fe: Efficient and durable heterogeneous Fenton catalyst made from PAN fibers • It achieves high specific rate constants at a low H 2 O 2 -to-BPA molar ratio (11.4:1) • Effective across pH 1–7 and in real water matrices, widely applicable, recyclable • Amidoxime groups enable iron chelation and H 2 O 2 activation • Degradation intermediates have lower toxicity than BPA The development of efficient and durable heterogeneous catalysts remains a key challenge for the remediation of persistent organic pollutants via catalytic wet peroxide oxidation. In this study, polyacrylonitrile (PAN) fibers were employed as catalyst supports to meet this challenge, leveraging their robustness, versatile functionalization, and ease of separation. Amidoxime-chelated iron (AO-Fe) active sites were assembled on PAN fibers through optimized amidoximation and iron-loading conditions. The resulting catalyst (PAO-Fe) exhibits exceptionally high normalized rate constants (82.29 L/(min·mol Fe) and 0.438 L/(h·m 2 )), enabling 97.3% bisphenol A (BPA) removal within 2 h with a low H 2 O 2 dosage (H 2 O 2 -to-BPA molar ratio of 11.4:1) under mild conditions (pH 6, 30 °C). PAO-Fe operates effectively across pH 1–7, efficiently degrades various dyes and pharmaceuticals, and maintains robust activity in real water matrices. Reusability tests demonstrate good performance over five cycles with low iron leaching (<0.62 mg/L), and the spent catalyst can be readily regenerated by iron reloading. Catalytic efficiency is modulated by coexisting anions and natural organic matter in a species- and concentration-dependent manner. Mechanistic studies reveal that amidoxime groups are essential for iron chelation and facilitate H 2 O 2 activation by forming a ternary complex with BPA, generating hydroxyl radicals as the major reactive species. The degradation intermediates of BPA are assessed to have lower toxicity. This work demonstrates that fiber supports integrated with AO-Fe active sites offer a viable strategy for developing high-performance heterogeneous Fenton-like catalysts. Download: Download high-res image (249KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Jin Han,Wanju Zhang,Lilan Huang,Jianyu Wu,Haojie Chen,Zhanxiao Wang,Xin Nie,Yujun Zhang
With the increasing complexity of wastewater, the development of catalytic membranes featuring heterojunctions of catalysts combined with advanced oxidation techniques has become a promising approach for wastewater treatment. This study prepared a heterostructured bimetal-based polyetherimide (PEI) catalytic membrane (HBPCM) via electrospinning and in-situ growth. The Z-type heterojunction of FeOOH and ZnO enhanced electron mobility, reducing photoluminescence intensity, Nyquist arc radius, and increasing photocurrent response, thereby improving redox and photocatalytic performance. Integrating photo-Fenton and membrane processes facilitated dynamic catalytic reaction, enhancing pollutant degradation through improved mass transfer. The photo-Fenton degradation of HBPCM for methyl orange (MO), orange G (OG), methylene blue (MB) and phenol (phOH) in static experiments reached 96.6 %, 87.5 %, 92.3 % and 95.7 % within 10 min, which were much higher than that of iron-based PEI catalytic membrane (IPCM) or zinc-based PEI catalytic membrane (ZPCM) in single photocatalysis or Fenton catalysis process. In dynamic experiments, photo-Fenton efficiency of HBPCM for MO, OG, MB, and phOH in 10 min was 8.55, 8.25, 6.86, and 2.69 times higher than in static conditions. Furthermore, loading FeOOH/ZnO conferred superhydrophilicity to the membrane, enhancing oil-water separation performance. Combining membrane technology with photo-Fenton catalysis offers an effective approach for treating complex wastewater.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2024
·
IF 4.3
Yiwen Li,Cuicui Hu,Shikuan Xu,Qi Guo,Pengfei Qi,Rong Li,Yanjun Xing
The removal of organic dyes from wastewater is crucial for environmental protection and water treatment. In this study, a ZIF-8/poly(vinyl alcohol) (PVA) composite was prepared for highly efficient dye adsorption using the contra-diffusion method. We investigated the conditions for ZIF-8-PVA to adsorb congo red (CR), including the influences of contact times, initial CR concentrations, pH values, and cyclic use. The results demonstrated that ZIF-8-PVA had a high Brunauer-Emmett-Teller (BET) surface area of 1704.03 m 2 /g. It exhibited a high removal efficiency of 98.43 % for CR, and its maximum adsorption capacity was 829.39 mg/g. After six cycles of adsorption, the removal efficiency of CR remained over 94.36 %. The removal efficiency of CR under a range of pH from 3 to 10 was consistently over 96.30 %. Moreover, ZIF-8-PVA also displayed adsorption capacity for various cationic and anionic dyes. The adsorption process aligned well with both the Langmuir model and the pseudo-second-order kinetic model. Based on FTIR, XPS, and swelling degree analyses, the adsorption mechanism was elucidated. Due to its universality and reusability, ZIF-8-PVA is suitable for practical application.
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
WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 235
·期 6
·1-12
·
IF 3.8
Li Haiyang,Li Xiaran,Quan Fengyu,Chen Zhaojun,Xia Yanzhi,Xiong Zhong
Multifunctional adsorbents are significant for the treatment of water-soluble dyes in contaminated aquatic systems and oily dyes in colored organic effluents. However, the existing adsorbent for both water-soluble and oil-soluble dyes is rare and the cleanup effect is not ideal. In this study, alginic acid carbon aerogel (AACA) as an effective wide-spectrum adsorbent was prepared through wet-spinning, ion-exchanging, drying, and high-temperature carbonization. AACA obtained a specific surface area of 1046.0 m 2 g −1 and a mean pore size of 2.82 nm. The adsorption capacities of AACA for methylene blue (cationic dye), methyl orange (anion dye), and oil red O (oil-soluble dye) were 493.5, 389.5, and 244.2 mg g −1 , respectively, which were improved in comparison with those of previously reported calcium alginate and ferric alginate carbon aerogels. The adsorption kinetics of AACA for the three dyes were fit for the pseudo-second-order kinetic model and the adsorption isotherms could be explained by the Langmuir model. ACCA revealed good adsorption performance for other eleven different sorts of dyes and binary dye systems. The adsorption mechanism was mainly confirmed to be π–π interactions.
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
ACS Nano
·
2025
·
IF 16
Ping Fu,Jia-Hui Xin,Wan-Long Li,Wan-Ting Lin,Zi-Lu Zhang,Xiao-Wei Luo,Chang Liu,Jaslyn Ru Ting Chen,Runkai Su,Si-Yuan Zhang,Zi-Jun Zhang,Qi-Zhi Zhong,Zhi-Kang Xu,Ling-Shu Wan
Polymer membranes are essential in separation processes such as desalination and organic solvent nanofiltration. However, simultaneously manipulating subnanometer pore size, homogeneity, and chemistry remains challenging due to the coupled diffusion–reaction of building blocks in membrane formation, resulting in the trade-off between permeance and selectivity. Here, we report a versatile enzyme-mediated strategy that kinetically decouples diffusion and reaction, enabling multidimensional pore engineering with tunable pore sizes (0.43–0.84 nm), improved homogeneity, and modular surface chemistry across eight polyamine–phenolic combinations. Phenolics with desired moieties diffuse uniformly into polyamine branch voids and create enzyme-regulated pores, forming highly homogenized and chemically tailored selective layers with ultraselectivity of ∼30 toward solutes with molecular weights below 350 Da, outperforming state-of-the-art membranes (selectivity <10). In high-value pharmaceutical separation, these membranes further achieve 1 order of magnitude higher selectivity, a 7.3-fold increase in solvent permeance, and a 6.8-fold improvement in enrichment efficiency compared to commercial membranes. By highlighting the importance of multidimensional pore engineering in improving membrane selectivity and permeability, our work suggests a pathway for unlocking the potential of polymer nanofiltration membranes for accurate molecular sieving applications.
研究领域:
膜科学
·
高分子科学
·
分离技术
·
酶催化
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2014
·
IF 4.258
Mei-Qiang Cai,Xiao-Qing Wei,Chun-Hui Du,Xu-Ming Ma,Mi-Cong Jin
A novel amphiphilic polymeric ionic liquid membrane containing a hydrophilic bromide anion and a hydrophobic carbonyl group was synthesized in dimethylformamide (DMF) systems using the ionic liquid 1-butyl-3-vinylimidazolium bromide (BVImBr) and the methylmethacrylate (MMA) as monomers. The prepared amphiphilic ploy-methylmethacrylate-1-butyl-3-vinylimidazolium bromide (MMA-BVImBr) was characterized by a scanning electron microscope and an infrared spectrum instrument. The results of solid-phase micro-extraction membrane (SPMM) experiments showed that the adsorption capacity of membrane was about 0.76 μg μg −1 for aniline. Based on this, a sensitive method for the determination of trace aniline, as a degradation product of azo dye Orange G under sonication, was developed by liquid chromatography–tandem mass spectrometry (LC–MS/MS). The calibration curve showed a good linearity ranging from 0.5 to 10.0 μg L −1 with a correlation coefficient value of 0.9998. The limit of quantification was 0.5 μg L −1 . The recoveries ranged from 90.6% to 96.1%. The intra- and inter-day relative standard deviations were less than 8.3% and 10.9%. The developed SPMM-LC–MS/MS method was used successfully for preconcentration of trace aniline produced during the sonication of Orange G solution.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）