CHEMICAL ENGINEERING JOURNAL
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2026
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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
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高影响因子
FOOD RESEARCH INTERNATIONAL
·
2022
·
IF 7.425
Qingqing Yu,Tong Shi,Zhiyu Xiong,Li Yuan,Hui Hong,Ruichang Gao,Yulong Bao
In order to study the effect of oxidation on the dye-binding behavior of myofibrillar proteins, selected dyes with different charges (positively charged Sarfarin O (SO), neutral bromophenol blue (BPB), and negatively charged Orange G (OG)) were incubated with myofibrils oxidized by the Fenton system with H 2 O 2 (10 mM). Upon oxidation, loss of free thiols, formation of carbonyls, particle size, and hydrophobicity of myofibrillar proteins (MPs) increased. The absolute value of Zeta-potential increased by 14.48 % after oxidation, the myofibrillar proteins shifted to a more acidic isoelectric point (pI) upon oxidation. Oxidation decreased net positive charges of myofibrillar protein and the binding ability of MPs towards OG in the environment with pH less than pI and the affinity of MPs towards SO in the environment with pH more than pI were thus increased. Here we propose a hypothesis that oxidation-induced change in net charges is the driving force affecting the amount of protein-bound dye. This paper aims to examine the effect of oxidation on the net charges of myofibrillar proteins and to provide insight into the mechanism of oxidation-induced changes in protein-bound dyes.
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PubMed
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2022
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IF 4.383
Bing Xiao,Minghao Xu,Bin Lu,Yun Wang,Hui Liu,Rufen Chen
Economical elimination of organic pollutants from waste water has be paid more attention owing to its environmental and ecological significance. In this study, an easily achievable process to in-situ fabricate copper and co-modified Z-scheme BiOCl/Bi 2 O 3 heterojunction was proposed. The study on the formation mechanism indicated that the introduction of copper ions is favorable for the formation of Bi-based catalyst with flaky morphology while the addition C-dots makes the nanosheets loosely be packed and intercrossed each other. The composite exhibited a high degradation efficiency for Bisphenol A (BPA) and 91% of BPA was removal within 35 min under xenon lamp irradiation. The excellent photocatalytic performance was attributed to the synergistic effect of the in-situ formation Z-scheme BiOCl/β-Bi 2 O 3 heterojunction, multiple charge transfer channels including Cu 2+ /Cu + and C-dots, and efficient charge separation. The electron paramagnetic resonance (EPR) analysis and quenching tests revealed that O 2 •− play a main role in degradation of BPA. Based on the experimental results, the photo-catalytic mechanism is proposed and the degradation path of BPA is revealed.
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高影响因子
Journal of Environmental Sciences
·
2022
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IF 6.796
Le Thi Thao,To Van Nguyen,Van Quy Nguyen,Ngoc Man Phan,Ki Jae Kim,Nguyen Nhat Huy,Nguyen Trung Dung
Wastewater containing an azo dye Orange G (OG) causes massive environmental pollution , thus it is critical to develop a highly effective, environmental-friendly, and reusable catalyst in peroxymonosulfate (PMS) activation for OG degradation. In this work, we successfully applied a magnetic MnFe 2 O 4 /α-MnO 2 hybrid fabricated by a simple hydrothermal method for OG removal in water. The characteristics of the hybrid were investigated by X-ray diffraction, scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, Fourier transform infrared spectroscopy , Brunauer–Emmett–Teller method, vibrating sample magnetometry, electron paramagnetic resonance, thermogravimetric analysis , and X-ray photoelectron spectroscopy. The effects of operational parameters (i.e., catalytic system, catalytic dose, solution pH, and temperature) were investigated. The results exhibited that 96.8% of OG degradation was obtained with MnFe 2 O 4 /α-MnO 2 (1:9)/PMS system in 30 min regardless of solution pH changes. Furthermore, the possible reaction mechanism of the coupling system was proposed, and the degradation intermediates of OG were identified by mass spectroscopy . The radical quenching experiments and EPR tests demonstrated that SO 4 • ̶ , O 2 • ̶ , and 1 O 2 were the primary reactive oxygen species responsible for the OG degradation. The hybrid also displayed unusual stability with less than 30% loss in the OG removal after four sequential cycles. Overall, magnetic MnFe 2 O 4 /α-MnO 2 hybrid could be used as a high potential activator of PMS to remove orange G and maybe other dyes from wastewater.
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高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 9
·2846-2855
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IF 6.177
Amjad Hussain Memon,Bin Wei,Saira Shams,Yucui Jiang,Mengzhao Jiao,Mingming Su,Hao Liang
The growing proportion of the textile industry has led to an increase in the concentration of colored dyes in aquatic systems. Compared to traditional natural enzymes, enzyme-mimicking nanomaterials with higher stability and lower sensitivity have become a promising approach for dye removal. In this work, a simple and efficient method was described to synthesize hematin nanocomposites (hematin@Cu/GMP) for degradation of several dyes, such as orange G (OG), amido black 10B (AB), crystal violet (CV), patent blue VF (PB) and methyl orange (MO). The experimental data suggested that the hematin-based nanocomposite exhibited excellent binding affinity towards Cu2+ and GMP with no effect on the composite formation in the presence of chloride salts. Further, the bi-enzymatic activity of the discussed composite was evaluated against different substrates with performance relatively better than natural laccase and horseradish peroxidase. The catalytic activity of the hematin@Cu/GMP demonstrated excellent potential with 100% degradation efficiency for the said dyes. The composite furthermore demonstrated relatively better performance for the degradation of the OG dye with retained catalytic activity under harsh chemical conditions. Moreover, the composite demonstrated excellent reusability and stability against inorganic radicals including cations, anions, and other organic solvents. The bi-enzymatic activity and catalytic potential of the proposed nanocomposites are suggestive of their reliability for greener industrial applications.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 9
·5438-5455
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IF 4.682
Liu Boyu,Liu Moxi,Xie Zhiyuan,Li Yiru,Zhang Aibo
Metal–organic frameworks (MOFs), a new type of porous functional material, have attracted widespread attention in the field of adsorption separation, medicine, and catalysis, etc., due to their unique adjustable pore structure and large specific surface. The defective zirconium-based MOF is rich in terminal Zr–OH induced by the lack of linkers and the μ3-OH originating from the Zr cluster, exhibiting high affinity for the carboxyl and sulfonic acid groups in the dyes. We report the performance of two defective zirconium-based MOFs (MOF-808 and MIL-140C) to remove Eosin y (EY), Methyl orange (MO), and Orange g from the water. Owing to the strong affinity, larger specific surface area, and better-matched pore structure, MOF-808 exhibits higher adsorption capacity for EY and MO, with maximum adsorption capacities of 661.7 mg g −1 and 532.4 mg g −1 , respectively. The adsorption kinetics, thermodynamics, adsorption cycle performance, and adsorption mechanism of two MOFs for three dyes were investigated. Adsorption thermodynamics and XPS analysis certified that both chemical adsorption and physical adsorption occur during the adsorption process, especially chemical adsorption. Desorption and regeneration tests demonstrate that both MOF-808 and MIL-140C maintained their high adsorption capacity after four cycles, indicating two MOFs are favorable candidates for removing pollutants. Graphical abstract
In this article, the adsorption performance of MOF-808 and MIL-140C on three different sizes and structures of anionic dyes is mainly studied. The results show that MOF-808 has better adsorption performance for EY and MO. At the same time, the adsorption results show that the chemical adsorption between the adsorbate and the MOFs material plays a leading role in the adsorption, resulting in a high adsorption capacity for EY, although the EY molecule has a larger molecular size.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yizhou Chen,Yuting Bai,Lijun Meng,Wenting Zhang,Jingjing Xia,Zhiming Xu,Rui Sun,Yan Lv,Tianxi Liu
Organic solvent nanofiltration (OSN), as an emerging membrane separation technology, holds great potential in pharmaceutical and chemical applications. However, the development of such a promising technology is severely retarded by the trade-off between permeability and selectivity. Herein, we report a novel thin-film nanocomposite (TFN) membrane by incorporating hollow metal-organic frameworks (MOFs) into the metal-phenolic network (MPN) selective layer for highly efficient OSN. This nanocomposite selective layer is fabricated via an aqueous deposition of tannic acid (TA) and Fe II ions with MOFs, during which the MOFs are in-situ etched to a hollow structure. Attributed to the extra transfer channels provided by hollow MOFs, the methanol permeance of the TFN membranes increases to 24.7 L·m -2 ·h -1 ·bar -1 , exhibiting an improvement of 270% compared with the membranes without MOFs (9.1 L·m -2 ·h -1 ·bar -1 ). Meanwhile, the coordination interaction between TA and metal centers in MOFs endows excellent interfacial compatibility between MPN matrix and MOF fillers, guaranteeing a defect-free selective layer and thus high rejection for small organic molecules (>99% for Alcian blue). Furthermore, various MOFs, including ZIF-67, prussian blue (PB), and MIL-53(Al), are also employed to fabricate MPN/MOF nanocomposite membranes, proving the availability and universality of this facial aqueous deposition strategy. Additionally, we also take deep insight into the mechanism of in-situ etching based on the density functional theory (DFT) calculation to pave the way for the fabrication of TFN membranes with other hollow nanofillers. This work provides a sufficient strategy for the design and construction of novel highly efficient OSN nanocomposite membranes with excellent permeability and retention performance.
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高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Tao Xian,Hongqin Li,Xiaofeng Sun,Yashan Huo,Lijing Di,Chenyang Sun,Hua Yang
The In2O3 nanoparticles were homogeneously attached on the BiOBr nanoplate surface to obtain S-scheme In2O3/BiOBr heterojunction photocatalysts by a hydrothermal route. The purity, crystal structure, chemical state, morphology, light absorption property, and photogenerated charge behavior of composites were investigated by XRD, SEM, TEM, HRTEM, XPS, UV–vis DRS, PL, ESR, and electrochemical tests. The removal of dyes (acid orange 7 (AO7), acid orange 10 (AO10), and rhodamine B (RhB)) and Cr(VI) was employed to evaluate the photocatalytic performance of In2O3/BiOBr composites irradiated by simulated sunlight. The results indicate that the photocatalytic performance of BiOBr can be remarkably promoted after the decoration of In2O3 nanoparticles, and the best photocatalytic activity was achieved over an 8% In2O3/BiOBr sample. The 8% In2O3/BiOBr sample also indicates outstanding synergistic photocatalytic performance for the removal of the heavy metal ion/dye mixture (AO7/Cr(VI) and RhB/Cr(VI)). It is found that the decoration of In2O3 nanoparticles can accelerate the transfer and separation of photoinduced electrons and holes in BiOBr nanoplates. The energy band structure, work function, and Fermi level of BiOBr and In2O3 were computed through the density functional theory calculation. Based on the above investigation, the photocatalytic mechanism of the S-scheme In2O3/BiOBr composite was discussed.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Chao Han,Huan Liu,Yan Wang
The preparation of polymeric-based thin film composite (TFC) membrane with high permeance and superior solvent resistance in organic solvent nanofiltration (OSN) applications always involves the consumption of toxic chemicals or high energy, which does not meet the requirements of green chemistry. In this work, intrinsic insoluble polyimide (PI) nanofiber substrates were obtained by a two-step method including electrospinning of poly (amic acid) synthesized by polycondensation reaction between various monomers and subsequent thermal imidization, and the optimized one with low thermal imidization temperature was employed as substrate for TFC membrane in strong polar aprotic solvents recovery, therefore achieving the green process. The effects of different dianhydride and diamine monomers and different thermal imidization temperatures on the solvent resistance and microscopic morphology of nanofiber substrates are also studied. The optimized monomers in this work contribute to a low-temperature imidization of PI nanofiber substrate. The solvent permeance of corresponding TFC OSN membrane with the insoluble PI nanofiber substrate reaches up to 11.2 L m −2 h −1 bar −1 with 99.7% rejection in rose bengal/DMF system, and good long-term stability. This work provides potential guidelines for developing next-generation OSN membranes under a green process.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yuyang Zhou,Xiaochun Wu,Jin Zhang,Zhenxing Wang
Tannic acid (TA) − 3-aminopropyltriethoxysilane (APTES) coating (TA-APTES coating) composed of abundant nanospheres with secondary reaction sites has many distinct advantages for surface modification. Herein, an in-situ growth method is proposed to generate TA-APTES nanospheres on both the outer and inner surface of polypropylene (PP) membrane. Compared with previous reported TA-APTES nano spheres coating just on the outer surface of the membrane (named PP-Su-NPs), TA-APTES nano spheres on both outer and inner surfaces prepared with this method (named PP-En-NPs) exhibits much better functional performance after secondary reactions. As a proof of concept, the TA-APTES nanospheres is functionalized by tannic acid, polyethyleneimine (PEI) and Fe 3+ to carry positive charges for absorbing anionic dyes, and the dye adsorption performance of the PP-En-NPs after the secondary reactions is 7–8 times higher than that of PP-Su-NPs. Interestingly, the functionalized coating can not only absorb anionic dyes, but also cationic dyes, and selective desorption is also realized for this functionalized coating. The possible mechanism is revealed in this study. This study will accelerate the development of the TA-APTES coating, and make it become a powerful tool for membrane modification.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Ping Sun,Hui Liu,Mingbao Feng,Xuesheng Zhang,Yingsen Fang,Zhicai Zhai,Virender K. Sharma
This work demonstrates for the first time the potential application of a novel nonradical oxidation system consisting of N/S co-doped ordered mesoporous carbon (NS-CMK-3) and peroxymonosulfate (PMS). The results showed that the NS-CMK-3 catalyst effectively activated PMS to completely degrade pharmaceutical acetaminophen (ACT). The catalytic performance of NS-CMK-3 was ~20 and 10 times better than that of pristine CMK-3 and single N-doped one (N-CMK-3), respectively. The oxidative system could also remove other pollutants (i.e., sulfathiazole, trans -ferulic acid, orange G, and phenol). A higher content of N (5.3 at.%) and a distribution of graphite-N (28.1%) were determined in NS-CMK-3 than in N-CMK-3. The synergistic effect of N/S co-doping (i.e., graphite-N and thiophene-S) resulted in the enhanced catalytic performance. The activation of PMS by NS-CMK-3 primarily followed two nonradical pathways (i.e., singlet oxygen and catalyst surface-bound reactive PMS complexes), supported by quenching experiments and electron paramagnetic resonance measurements. The p -benzoquinone ( p -BQ) and ACTdimer were main degradation products. The removal of total organic carbon (TOC) was ≈27%, suggesting nonradicals could mineralize ACT. The NS-CMK-3 not only demonstrated superior stability owing to a removal efficiency that was still as high as 98% in the fifth recycle run, but also significantly decreased the potential effects of water constituents (e.g., Cl − , NO 3 − , HCO 3 − , and humic acid) on the removal process. The NS-CMK-3/PMS oxidative system offers a novel strategy to carry out environmental remediation via nonradical processes.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Qin Liu,Sheng Xu,Shu Xiong,Ming Yi,Yan Wang
Substrate modification of thin film composite (TFC) membranes by various crosslinkers is generally required for organic solvent nanofiltration (OSN) application, to enhance the membrane stability and solvent resistance, which however leads to the permeance decline. In this contribution, coordination-crosslinked polyimide substrate is developed for the first time, which is different with those covalently-crosslinked substrates, and achieves the enhanced solvent resistance, improved hydrophilicity and optimized porous microstructure simultaneously. The effects of the alkaline coagulation bath, subsequent ion exchange, and further solvent activation are investigated. The resultant TFC membrane breaks through the typical permeability-selectivity trade-off of OSN membranes successfully, exhibiting an astonishingly superior solvent permeance (1.5–2 times the highest data) (65.2 LMH/bar for methanol, 33.1 LMH/bar for ethanol and 59.1 LMH/bar for acetone) to previously reported polymeric-based TFC OSN membranes with a competitive solute rejection (>98% for Rose Bengal). This study is believed to provide a new orientation in the development of the desirable substrate for the high-performance OSN composite membrane and other separation applications.
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高影响因子
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