Polymers
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2023
·Vol. 15
·期 4
·839
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IF 5
Yin Tang,Tang Zhu,Huichao Liu,Zheng Tang,Xingwen Kuang,Yongna Qiao,Hao Zhang,Caizhen Zhu
Hydrogel coatings that can endow various substrates with superior properties (e.g., biocompatibility, hydrophilicity, and lubricity) have wide applications in the fields of oil/water separation, antifouling, anti-bioadhesion, etc. Currently, the engineering of multifunctional hydrogel-coated materials with superwettability and water purification property using a simple and sustainable strategy is still largely uninvestigated but has a beneficial effect on the world. Herein, we successfully prepared poly(2-acrylamido-2-methyl-1-propanesulfonic acid) hydrogel/β-FeOOH-coated poly(vinylidene fluoride) (PVDF/PAMPS/β-FeOOH) membrane through free-radical polymerization and the in situ mineralization process. In this work, owing to the combination of hydrophilic PAMPS hydrogel coating and β-FeOOH nanorods anchored onto PVDF membrane, the resultant PVDF/PAMPS/β-FeOOH membrane achieved outstanding superhydrophilicity/underwater superoleophobicity. Moreover, the membrane not only effectively separated surfactant-stabilized oil/water emulsions, but also possessed a long-term use capacity. In addition, excellent photocatalytic activity against organic pollutants was demonstrated so that the PVDF/PAMPS/β-FeOOH membrane could be utilized to deal with wastewater. It is envisioned that these hydrogel/β-FeOOH-coated PVDF membranes have versatile applications in the fields of oil/water separation and wastewater purification.Keywords:hydrogel coating;photo-fenton catalysis;PVDF membrane;oil/water separation;water purification
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CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Hiu Lam So,Wei Chu
This study demonstrated a simultaneous photocatalysis and adsorption of 1-naphthol by peroxymonosulfate (PMS), FeOOH and UV-C in a novel column reactor, which is composed of a submerged UV-C lamp, mixed quartz bead-FeOOH media bed and a continuous supply of oxidant. Around 80 % of 1-naphthol was removed at its optimal condition. The reaction mechanism was found to be pH dependent. At lower pH, photocatalysis and adsorption are favored as the catalyst surface is protonated (≡FeOH 2 + ) to promote PMS activation and 1-naphthol adsorption, and the dissolution of Fe 3+ enhanced homogeneous activation of PMS. At pH level higher than 8, the reaction becomes retarded due to the deprotonation of catalyst surface and dissociation of 1-naphthol into its conjugate base. Superoxide radical (O 2 •- ), singlet oxygen ( 1 O 2 ) and sulfate radical (SO 4 •- ) were confirmed to contribute to 1-naphthol oxidation . The reactor design was optimized at 20 min retention time. Due to the regeneration of Fe III /Fe II sites on FeOOH, the performance of reused catalyst is maintained at 90 % after 5 cycles of reuse. A quadratic regression with R 2 = 0.929 was used to model the concentration gradient of 1-naphthol along the column at different time intervals.
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ChemistrySelect
·
2023
·Vol. 8
·期 45
·e202301199
·
IF 2.1
Zhiwei Wang,Junhua You,Jingjing Li,Jingsheng Xu,Xuanhao Li,Mingyi Duan,Hangzhou Zhang
Graphical FeOOH/BiOBr composite photo-Fenton catalyst was prepared by simple precipitation and impregnation method, in which 1.8 % FeOOH/BiOBr had the highest photo-Fenton catalytic activity. The quantum size of FeOOH is beneficial to increase the number of active sites and improve the electron mobility between composites. FeOOH quantum dots (QDs) were successfully anchored on 2D BiOBr nanosheets as composite photo-Fenton catalysts by a simple precipitation and impregnation method. Using Rhodamine B (RhB) as an organic dye model, the photo-Fenton catalytic activity of the composite catalyst was significantly higher than that of BiOBr and FeOOH. Among them, 1.8 % FeOOH/BiOBr has the highest photo-Fenton catalytic activity. The main reason is that the interface effect between FeOOH and BiOBr can enable photogenerated electrons to rapidly transfer from the surface of BiOBr to FeOOH to participate in the Fe 3+ /Fe 2+ cycle. Meanwhile, the quantum size of FeOOH increases the density of active sites on the surface of the composite catalyst. The influence of external factors on the catalytic activity of the catalyst was also verified. Finally, the electron transfer direction and main active species (h + , ⋅O 2 − ) of the composite catalyst were discussed by electrochemical analysis and radical trapping experiments, and a reasonable catalytic degradation mechanism was proposed.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Zhichun Si,Mengxi Pei,Yishui Liu,Bo Li,Feiyu Kang
Photocatalytic degradation is considered as the most energy-efficient, environmentally benign, and effective method for treating low fraction organic contaminants. However, the photocatalysts still suffer from low utilization efficiency of visible-light and severe carrier recombination. Heterojunctions can resolve these two main problems in some extent but still be restrained by the low quality of hetero-interface. In this study, homojunction was constructed of β-FeOOH quantum dots and nanorods with the same lattice by a two-step precipitation method, to avoid the heterointerface with too many defects and possess good charge separation as a consequence. The catalysts were characterized by activity test, electron spin resonance, Mott-Schottky plots, photocurrent density tests and open-circuit potential measurements, etc. The results revealed that a strong internal electric fields (IEFs) was created at the interface of catalyst. Beneficently, the electron rearrangement leads to a more rational distribution of oxygen vacancies in the catalyst, resulting in more efficient dissociation of oxygen molecules and formation of active radicals, thus facilitating the efficient degradation of toluene. This study proposes a novel strategy to boosting the photocatalytic activity of low dimensional semiconductors via forming homojunction interfaces to improve their charge transfer.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Fanqing Meng,Yingling Wang,Zhen Chen,Jinglu Hu,Guang Lu,Wei Ma
The occurrence of antibiotics in water environment has drawn great concerns in recent years. In this work, CQDs@FeOOH electro-catalyst with abundant active edges was synthesized and applied to the degradation of antibiotics. About 99.6 % levofloxacin (LEVO) and 53.7 % TOC could be efficiently removed by CQDs@FeOOH after 60 min degradation. The high LEVO degradation performance of CQDs@FeOOH was demonstrated to be attributed to the high mass transfer ability and the high OH generation ability of the special needles structure. The OH was found to be the main radical for LEVO degradation, and the highest OH generation ability of CQDs@FeOOH was found to be resulted from the moderate adsorption energy of the exposed (1 1 0) facets (needles) toward OH. A possible LEVO degradation pathway has been proposed and toxicity changes during LEVO degradation were detailed investigated. This study offers an efficient method to reduce the amount and toxicity of antibiotics in water.
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APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Shu-ao He,Wei Li,Xiao Wang,Qiong Ma,Min Li,Wei Xu,Xue-chuan Wang,Chen-hui Zhao
The two-dimensional (2D) g-C 3 N 4 has a wide application prospect in photocatalysis field due to its larger surface reactions, wider absorption of light and faster charge separation. However, the lack of active site of reduction leads to its poor hydrogen evolution reaction (HER) activity. In this work, the intermediate β-FeOOH was synthesized as a high-efficiency precious metal free co-catalyst in hydrogen production. Then, the g-C 3 N 4 -Fe 3 O 4 /β-FeOOH (CNFF-x,y, x = 1, 2 and 3, y denotes the reaction time (h)) photocatalyst based on p-n and Z-scheme heterojunction was constructed via a subsequent solvothermal process. The chemical composition, microtopography, crystallography, photochemical and electrochemical properties of the CNFF-x,y were analyzed by XRD, FI-IR, TEM, XPS and so on. The visible-light-driven (VLD) catalytic performance of CNFF-x,y heterojunction was evaluated by the hydrogen evolution reaction (HER). Results showed that CNFF-2,10 photocatalyst based on p-n (g-C 3 N 4 -Fe 3 O 4 ) and Z-scheme (Fe 3 O 4 /β-FeOOH) heterojunction presented the highest VLD catalytic HER activity (33.25 μmol g −1 h −1 ) at the absence of Pt co-catalyst after illumination for 6 h. It indicated that the effective introduction of Fe 3 O 4 /β-FeOOH nanoparticles (NPs) into g-C 3 N 4 to construct double-heterojunction (g-C 3 N 4 -Fe 3 O 4 /β-FeOOH) could greatly broaden the light response property and inhibit the recombination of photo-induced carriers, exhibiting enhanced HER activity. Meanwhile, this double-heterojunction photocatalyst presented robust photostability and reproducibility even been used several times. The findings of an intermediate β-FeOOH were put forward in this study will provide some new ideas for the research of HER.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Jing Ma,Hongjun Lin,Wei Yu,Cheng Chen,Qianqian Zeng,Siyuan Chen,Xuezheng Huang,Leihong Zhao,Liguo Shen
Lately, frequent offshore oil spills and the limitations of traditional oil–water separation membranes in balancing selectivity and permeability have driven the development of innovative membrane technologies for the efficient treatment of oily wastewater. In this study, a durable and recyclable Acrylonitrile–Butadiene–Styrene (ABS) membrane was fabricated using 3D printing, subsequently sulfonated via radiation-induced grafting, and further modified with in situ mineralization to prepare β-FeOOH@ABS membrane. The β-FeOOH@ABS membrane exhibited excellent hydrophilicity and oleophobicity compared to bare hydrophobic ABS membrane, with a water contact angle of 16° and an underwater oil contact angle of 162°. Under gravity-driven conditions, the β-FeOOH@ABS membrane achieved a separation efficiency exceeding 99.78 % across five different oil–water mixtures, along with an exceptionally high flux of 2.93 × 10 5 L·m -2 ·h -1 , attributed to stable hydration layer formed via β-FeOOH nanorods. Combined 100 cycles durability tests and XDLVO theoretical analysis, it was found that the β-FeOOH@ABS membrane showed excellent long-term stability and anti-fouling performance with high flux recovery of 99.41 % and separation efficiency of 99.83 %, originating from its enhanced fouling resistance. The photocatalytic property of β-FeOOH nanorods also endowed the β-FeOOH@ABS membrane with superior catalytic performance. This work underscores the significant potential of novel β-FeOOH@ABS membranes for advanced oil–water separation applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Li Yuan,Xueqian Wang,Xiang Li,Jianhong Wang,Langlang Wang,Yiran Xiong,Yuhang Xiao,Ping Ning
The performance of FeOOH for the removal of hydrogen sulfide (H 2 S) has been widely investigated. However, the harsh conditions of use and the difficulty of regeneration limit its practical application. In this study, FeOOH was loaded on activated carbon (AC) by a hydrothermal method to obtain a series of XF-AC catalysts for the removal of H 2 S from blast furnace gas (BFG). Among these catalysts, 3F-AC exhibited a high penetrating sulfur capacity of 482.3 mg/g and good regeneration performance. It is noteworthy that the use of AC as the support induced the transformation of α-FeOOH crystals into amorphous FeOOH and affected their morphology, and uniformly dispersed nanoparticles rather than agglomerated acicular crystals appeared on the surface of AC. The presence of amorphous FeOOH modulated the basic sites and surface hydroxyl groups of the catalysts while generating hydroxyl radicals during the reaction, thus improving the adsorption and oxidation of H 2 S. More importantly, the structural properties (surface area and pore volume) of 3F-AC enhanced the storage capacity of elemental sulfur and reduced the formation of by-products. The cyclic catalytic role of Fe 3+ /Fe 2+ played an important role in the oxidation process. This work provides a simple and effective strategy for the design of BFG desulfurization catalysts.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Xinyan Li,Teng Wang,Guilan Zhang,Xin Wen,Xinchuan Ma,Gang Xie,Lan Ma,Liyun Zhang
Developing an anti-fouling and multifunctional membrane with efficient separation performance is great potential for alleviating water crisis. Here, combining the heterogeneous β-FeOOH/Ag catalyst layer, intercepted GO nanosheets layer, and porous polyvinylidene fluoride (PVDF) substrate, a multi-layer composite membrane (β-FeOOH@GO/AgNWs) was designed and fabricated by the polyphenol (TA)-metal (Fe 3 + ) crosslinking and inductive effect. Hence, the β-FeOOH@GO/AgNWs membrane possesses robust physical and chemical stability, superhydrophilicity (water contact angle ∼0°) and underwater superoleophobicity (underwater oil contact angle >150°). Due to the construction of heterojunctions of β-FeOOH/Ag, the β-FeOOH@GO/AgNWs membrane achieved the degradation of various dyes under the photo-Fenton system, the degradation rate constant is 0.0986 min −1 . Meanwhile, the synergistic effect of multi-layer structure can efficiently intercept the various soluble dyes by electrostatic effect, π-π action and layered channels, the reject rate recached above 97.89 % under the acidic and neutral environment. Faced the membrane fouling phenomenon during the separation process, the flux and rejection of fouled membrane recovered to above 95.1 % and 97.9 % after photo-Fenton cleaning for 10 min. Moreover, the β-FeOOH@GO/AgNWs membrane also realized efficient separation performance for various oil-in-water emulsions, the flux reached 329.2 ± 25–486.1 ± 15 L m −2 h −1 bar −1 , the corresponding separation efficient was above 99 %. Similarly, the photo-Fenton cleaning strategy also regenerated the fouled composite membrane, the flux recovery rate was above 95 %. Therefore, we think that β-FeOOH@GO/AgNWs membrane can bring a new thinking of developing the multifunctional membrane to achieve complex wastewater remediation.
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Tungsten
·
2025
·
IF 11.2
Wang Xue,Zhang Li,Han Yu,Li Feng-Bo,Li Shao-Bin
Accurate non-invasive glucose monitoring is crucial for health diagnostics. However, the development of high-performance non-enzymatic electrochemical sensors for this application remains a significant challenge. To address this issue, a novel material, FeOOH encapsulated within zeolitic imidazolate framework-67 (ZIF-67)-derived copper-cobalt-layered double hydroxide (FeOOH@CuCo-LDH), was developed through a vapor-assisted deprotonation process for FeOOH encapsulation, followed by a hydrothermal reaction to synthesize the hollow composite. The synergistic interactions between the multi-metallic composition and the hollow structure significantly enhance glucose oxidation-reduction reactions. This enables the sensor to achieve a wide linear detection range (0.5–722 μmol·L −1 and 722–4222 μmol·L −1 ), high sensitivity (4.05 and 1.43 μA·L·μmol −1 ·cm −2 ), and a low limit of detection (0.83 μmol·L −1 ). The sensor demonstrated excellent performance in practical applications, accurately detecting glucose in saliva under physiological conditions. This study highlights the potential of FeOOH@CuCo-LDH as an excellent electrode material for non-enzymatic electrochemical glucose sensing, offering promising applications in diabetes prevention and diagnosis. Graphical abstract
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Siqi Huang,Qun Zhang,Pengyu Liu,Shengjia Ma,Bing Xie,Kai Yang,Yaping Zhao
In this study, novel up-converted carbon quantum dots (CQD) incorporated goethite (α-FeOOH) nanohybrids (CQDs/α-FeOOH) were fabricated via a facile hydrolysis method. CQDs/α-FeOOH exhibited remarkably degradation efficiency towards tetracycline (TC, 0.1503 min -1 ), approximately 3.7 times than pristine α-FeOOH with much lower amount of H 2 O 2 (0.5 mM) under visible light irradiation (λ＞420 nm). The quenching and electron spin resonance (ESR) tests proved · OH, O 2 · - and 1 O 2 were involved in TC degradation in CQDs/α-FeOOH catalyzed Fenton system. The potential Ultraviolet-Visible-Infrared (UV–vis-IR) broad-spectrum responsive properties of CQDs/α-FeOOH were proved in degradation various surface charged organic contaminants regarding the function of coupling up-conversion CQDs. CQDs/α-FeOOH also exhibited wide application pH, excellent durability, fairly good catalytic performance within different practical water matrices and completely eliminated related drug resistance of TC even under real solar-light conditions. The good biocompatibility makes CQDs/α-FeOOH served as a promising photocatalyst for remediation of water contamination with efficient utilization of solar energy.
研究领域:
环境科学
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材料科学
·
生物学
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Biosensors-Basel
·
2023
·Vol. 13
·期 1
·103
·
IF 5.4
Xu Li,Jiali Huang,Jiayu Ding,Mingzhen Xiu,Kang Huang,Kang Cui,Jing Zhang,Shiji Hao,Yan Zhang,Jinghua Yu,Yizhong Huang
A dual-mode lab-on-paper device based on BiVO4/FeOOH nanocomposites as an efficient generating photoelectrochemical (PEC)/colorimetric signal reporter has been successfully constructed by integration of the lab-on-paper sensing platform and PEC/colorimetric detection technologies for sensitive detection of carcinoembryonic antigen (CEA). Concretely, the BiVO4/FeOOH nanocomposites were in situ synthesized onto the paper-working electrode (PWE) through hydrothermal synthesis of the BiVO4layer on cellulose fibers (paper-based BiVO4) which were initially modified by Au nanoparticles for improving the conductivity of three dimensional PWE, and then the photo-electrodeposition of FeOOH onto the paper-based BiVO4to construct the paper-based BiVO4/FeOOH for the portable dual-mode lab-on-paper device. The obtained nanocomposites with an FeOOH needle-like structure deposited on the BiVO4layer exhibits enhanced PEC response activity due to its effective separation of the electron–hole pair which could further accelerate the PEC conversion efficiency during the sensing process. With the introduction of CEA targets onto the surface of nanocomposite-modified PWE assisted by the interaction with the CEA antibody from a specific recognition property, a signal-off PEC signal state with a remarkable photocurrent response decreasing trend can be achieved, realizing the quantitative detection of CEA with the PEC signal readout mode. By means of a smart origami paper folding, the colorimetric signal readout is achieved by catalyzing 3,3′,5,5′-tetramethylbenzidine (TMB) to generate blue oxidized TMB in the presence of H2O2due to the satisfied enzyme-like catalytic activity of the needle-like structure, FeOOH, thereby achieving the dual-mode signal readout system for the proposed lab-on-paper device. Under the optimal conditions, the PEC and colorimetric signals measurement were effectively carried out, and the corresponding linear ranges were 0.001–200 ng·mL−1and 0.5–100 ng·mL−1separately, with the limit of detection of 0.0008 and 0.013 ng·mL−1for each dual-mode. The prepared lab-on-paper device also presented a successful application in serum samples for the detection of CEA, providing a potential pathway for the sensitive detection of target biomarkers in clinical application.Keywords:PEC;colorimetric;lab-on-paper device;BiVO4/FeOOH;CEA
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