SCIENCE OF THE TOTAL ENVIRONMENT
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2021
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IF 7.963
Huang Zhang,Peng Wang,Lin Shi,Jianliang Xue,Aiping Liang,Di Zhang
The adsorption of ofloxacin (OFL) on oxidized activated carbon (AC) and carbon nanotube (CNT) are compared, focusing on the differences in carbon structures. Chemical oxidation of carbonaceous materials inhibited OFL adsorption to AC, but enhanced their adsorption to CNT. The higher number of oxygen-containing functional groups facilitated the interaction of the material with water molecules, causing the blockage of AC inner pore. However, the dispersion of oxidized CNT enhanced due to its increased hydrophilicity, resulting in the exposure of some new adsorption sites, as identified by the 1 H NMR relaxometry measurement. The adsorption kinetics of OFL on AC indicated that the contributions of slow adsorption and equilibrium time increased after AC oxidation. However, the equilibrium time of the fast adsorption of OFL on CNT shortened after CNT oxidation. These results indicated that the pore of AC was blocked by water cluster and the accessibility of adsorption sites on oxidized CNT was enhanced due to dispersion. This study emphasizes that the structural differences among carbonaceous materials control the oxidation effects on their adsorption characteristics for OFL.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2024
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IF 4.8
Huanhuan Zheng,Hengchang He,Min Lu,Yuhui Pei,Huapei Peng,Wanli Zhou,Cheng Guo,Jianqiang Wang
Novel composite material (g-C 3 N 4 @Ser-PMO) based on the combination of serine mesoporous organosilicon (Ser-PMO) and graphitic carbon nitride (g-C 3 N 4 ) was designed to purify water containing antibiotic under light illumination. Serine mesoporous organosilicon was first formed by using self-created organosilicon precursor with serine as organic silicon resource in the presence of g-C 3 N 4 under template via co-condensation method. The structural, morphological and optical properties of composite material were confirmed by series of characterizations including XRD, FTIR, N 2 adsorption-desorption, UV–vis DRS spectra, TEM and XPS spectra. These results displayed that ordered mesoporous channels were formed on the surface of graphitic carbon nitride to enhance optical properties. Meanwhile, Serine was first induced in mesoporous framework to provide active sites. During photo-degradation experiment of ofloxacin in water, composite material exhibited excellent degradation efficiency. 99 % of ofloxacin was nearly degraded under the light irradiation in 90 min, compared with pristine g-C 3 N 4 . Moreover, composite material showed good stability and recyclability after multiple cycle experiments, which provided an ideal way to alleviate the pollution problem from antibiotics in water.
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NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Xuan Liu,Jie Chao,Feifei Guo,Liangliang Chang,Zengzhe Xi
To address rapid carrier recombination and low magnetic separation efficiency in piezocatalysis, Gd/Ni co-doped BiFeO3 nanoparticles were synthesized via a sol–gel method. Rietveld refinement confirmed lattice distortion and secondary phase formation at high doping levels. Gd/Ni doping induces a phase transition in BFO from rhombohedral to orthorhombic, with the Pnma proportion reaching 84.15% at x = 0.09. Gd/Ni co-doping induced 12.7% oxygen vacancy concentration, suppressing electron–hole recombination, while enhanced Dzyaloshinskii–Moriya interaction increased saturation magnetization by 17.85-fold (magnetic recovery > 95%). The optimized sample (x = 0.09) achieved 80.94% ofloxacin degradation in 120 min (twice that of pristine BiFeO3), retaining 71.53% efficiency after 4 cycles. Radical trapping and EPR identified ˙OH and ˙O2− as dominant species, revealing a ferroelectric–piezoelectric synergistic mechanism. This work provides a strategy for designing magnetically recoverable piezocatalysts for complex wastewater treatment.
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JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Peng Gao,Shaojiang Huang,Kang Tao,Zexin Li,Li Feng,Yongze Liu,Liqiu Zhang
Multi-wall carbon nanotubes (MWCNTs) with high electrical conductivity are commonly accounted as the ideal additives to enhance the charge surface migration efficiency in photocatalysis . Theoretically, the MWCNTs-modified binary photocatalysts have potential for the change of nanocrystal structure. Herein, we reports an adjustable {312}/{004}facet heterojunction MWCNTs/Bi 5 O 7 I nanocomposite . Interestingly, the synergistic effect of {312}/{004}facet heterojunction and MWCNTs can effectively accelerate the spatial charge carriers transport. A novel {312}/{004}facet “S-scheme” pathway was proven to be the dominated pathway for the enhancement of spatial charge carriers. As a result, the MWCNTs-{312}/{004}Bi 5 O 7 I composites exhibited superior photocatalytic oxidation efficiency for a representative antibiotics ofloxacin photodegradation . Density functional theory (DFT) calculation and LC-MS/MS analysis confirmed that the possible dealkylation and oxidation pathways could be found in OFL degradation. This work provides novel insights for the relationship between charge carrier transport and facet structure-property.
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Sustainability
·
2024
·Vol. 16
·期 7
·2629
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IF 3.3
Haifeng Wang,Yang Yang,Mengping Wang,Runjiao Yuan,Wenyi Song,Lin Wang,Ni Liang,Jiayi Shi,Jing Li
In the present study, banana pseudo-stem (BS) was pyrolyzed under anaerobic conditions without any physical or chemical modification. Their properties, as well as their sorption affinity to ofloxacin (OFL), were studied. As a result, oxalates and KCl formed at a relatively low temperature of 300 °C, while bicarbonates generally formed at a pyrolysis temperature above 400 °C. Surface functional groups of BS biochars facilitated OFL sorption mainly via specific interactions including electronic attraction (EA), π–π electron donor–acceptor (π–π EDA) interaction, the ordinary hydrogen bond (OHB), and the negative charge-assisted hydrogen bond ((−)CAHB). Except for (−)CAHB, these interactions all decreased with an elevated pH, resulting in overall decreased OFL sorption. Significant OFL sorption by BS biochars produced at 300 °C, observed even at an alkaline condition was attributed to (−)CAHB. Micropores formed in BS biochar prepared at 500 °C, with a specific surface area as high as 390 m2g−1after water washing treatment. However, most micropores could not be accessed by OFL molecules due to the size exclusion effect. Additionally, the inherent K-containing salts may hinder OFL sorption by covering the sorption sites or blocking the inner pores of biochars, as well as releasing OH−into the solution. Thus, BS biochar produced at 300 °C is an excellent sorbent for OFL removal due to its high sorption ability and low energy. Our findings indicate that biochar techniques have potential win–win effects in recycling banana waste with low energy and costs, and simultaneously converting them into promising sorbents for the removal of environmental contaminants.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Liusha Cen,Fan Yu,Chengcai Li,Guojin Liu,Wangyong Jin,Hailin Zhu,Yuhai Guo
Recently, heterogeneous catalysts prepared by two phase metals were commonly used to activate PMS degradation. However, the synergistic effects of Zn and other metals on the activation of PMS were infrequently studied. In this work, novel PVDF@TA-ZIF-67/8 nanofibers were prepared successfully by first mineralization and then in-situ growth. The prepared PTZ70 exhibited an evidently higher photocatalytic activity than PVDF, PTC, PTZ0, PTZ10 and PTZ100 to degradation OFX (96.5 %). The effects of the mass ratio of Co and Zn, PMS dosage, coexisting ions and organic solvents on the degradation of OFX were concretely investigated. The radical trapping experiment and mechanism analysis showed that the synergistic effect of Co and Zn played a key role in PMS activation, accelerating the generation of 1 O 2 and •O 2 – . Combining the discussion of influencing factors and LC-MS analysis, four OFX degradation pathways were illustrated. In particular, we observed that the degradation OFX of PTZ70 was only slightly reduced by 5.6 % after five cycling, indicating the reusability, good stability and high environmental suitability of PTZ70 performance . This study offers a novel path for the design of catalytic membranes with controllable heterogeneous metal doping.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Guosheng Jia,Zhiwei Huang,Yameng Fan,Lingfei Zhao,Weihong Lai,Shi Xue Dou,Xuefen Wang,Hengxue Xiang,Meifang Zhu
The environmental problems caused by the abuse of antibiotics are raising serious attention, and the removal of antibiotics in wastewater is meaningful yet challenging. In this work, lignin-derived carbon fibers loaded layered double hydroxides (LDH@LCF) has been prepared for the removal of ofloxacin (OFX) from wastewater via photocatalysis, which exhibit a high degradation efficiency of 96 % under visible light and maintained 90 % after five reuses. The effects of Zn 2+ /Fe 3+ in the samples and other parameters affecting the photocatalytic efficiency of OFX have been systematically investigated. Results demonstrated that the enhanced photocatalytic efficiency is derived from the synergistic effect of the Zn 2+ and Fe 3+ in the LDH with a reduced band gap of the catalyst, higher number of oxygen and metal unsaturated coordination sites, and rapid removal of photogenerated electrons. The working mechanism and degradation pathways for OFX by LDH@LCF are also elucidated in detail.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Sijie Ge,Ge Chen,Zhaochang Wu,Mengchen Zong,Ruolan Chen,Jie Zhang
A bimetallic spinel Mn 0.8 Co 2.2 O 4 catalyst was successfully synthesized for PMS activation • Mn 0.8 Co 2.2 O 4 /PMS gains 100% OFX removal (25 min), 76.96% PMS use, 96.9% TOC removal • Coexisting radical and nonradical pathways via Co/Mn redox and oxygen vacancies • DFT confirmed Mn doping improved PMS adsorption, O O bond elongation, and d-band upshift • The catalyst exhibited excellent stability, reusability, and broad-spectrum applicability Ofloxacin (OFX), a recalcitrant fluoroquinolone antibiotic, poses significant risks to ecosystems and human health, necessitating the development of efficient remediation technologies. In this study, a bimetallic spinel Mn 0.8 Co 2.2 O 4 catalyst was successfully synthesized via pyrolysis of a CoMn-BTC metal-organic framework precursor and employed for peroxymonosulfate (PMS) activation toward OFX degradation. The incorporation of Mn into the Co 3 O 4 lattice induced lattice distortion, enlarging specific surface area (45.3 m 2 /g), and enriching Co 2+ content (58.34%), oxygen vacancies, and hydroxyl groups, thereby enhancing electron transfer capability and redox activity. The Mn 0.8 Co 2.2 O 4 /PMS system achieved complete OFX removal within 25 min (k = 0.14219 min −1 ), 1.78 times higher than pristine Co 3 O 4 , with high PMS utilization (75.96%) and near-complete mineralization (96.9% TOC removal). The catalyst exhibited excellent stability over five cycles with minimal metal leaching (Co: 0.365 mg/L, Mn: 0.079 mg/L) and maintained high efficiency (≥88.81%) across pH 3–11. Both radical (•O 2 − , SO 4 •- , •OH) and non-radical ( 1 O 2 , Co(IV) = O) pathways contributed, with 1 O 2 and •O 2 − predominant, with Co/Mn redox cycles and oxygen vacancies serving as key active sites. Electrochemical analysis and density functional theory calculations further confirmed that Mn doping enhanced PMS adsorption energy, elongated the O O bond, facilitated interfacial electron transfer, and shifted the d-band center closer to the Fermi level, thereby boosting catalytic activity. Three plausible degradation pathways were proposed based on reactive site analysis and intermediate identification. This work provides fundamental insights into Mn-doped cobalt spinel for Fenton-like PMS activation and demonstrates their potential as efficient, stable catalysts for antibiotic-contaminated wastewater remediation. Download: Download high-res image (296KB) Download: Download full-size image
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Meiyu Yuan,Yaojun Dong,Panpan Zhou,Sheng Cui,Zhongwei Chen
The persistent discharge of ofloxacin (OFL) into aquatic environments poses severe ecological threats. However, conventional titanium-based photocatalysts suffer from limited visible-light response and rapid charge recombination. Herein, self-supporting Zn 2 Ti 3 O 8 /ZnTiO 3 Type-II heterojunction aerogel was synthesized via a sol-gel pathway coupled with supercritical CO 2 drying and thermal modulation. Comprehensive XRD and HRTEM/SAED analyses confirm the synchronous crystallization of cubic Zn 2 Ti 3 O 8 and hexagonal ZnTiO 3 , establishing an intimate heterojunction interface. Meanwhile, SEM observation reveals a highly continuous 3D interconnected porous aerogel framework. Calcined at 750 ℃, the optimized aerogel beautifully preserves a hierarchically porous network with an expansive specific surface area, providing abundant active sites and fast mass transfer channels. Consequently, the heterojunction aerogel sample achieves an exceptional OFL degradation efficiency exceeding 96% within 60 min under simulated solar light, obeying pseudo-first-order kinetics. Photoelectrochemical profiling and ESR analyses verify that the staggered Type-II alignment robustly suppresses carrier recombination, accelerating charge separation to harvest active free radicals (·O 2 - and ·OH) for OFL mineralization. Furthermore, density functional theory (DFT) and frontier molecular orbital calculations corroborate the hybridized electronic structure and unveil the targeted radical attack pathways for molecular cleavage. This work provides a compelling paradigm to merge heterojunction chemistry with structural aerogel design for environmental remediation.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
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IF 5.4
Jiao Guo,Fuwei Yang,Yakun Zhang,Yuqing Chen,Wei Zhang,Aimin Chen,Yuheng Qin,Pengfei Liu
In this study, a hierarchical activator (De@NiCo-LDH nanocomposite) was successfully fabricated through in-situ growth of nickel–cobalt layered double hydroxide (NiCo-LDH) nanosheets on diatomaceous earth (De) substrates. The material’s structural and chemical properties were systematically characterized using SEM, XRD, FTIR, XPS, and BET analyses. The optimized De@NiCo-LDH/PMS system demonstrated exceptional catalytic performance, achieving 96.6 % ofloxacin (OFL) degradation efficiency via peroxymonosulfate (PMS) activation. Mechanism investigations, including radical quenching experiments and electron paramagnetic resonance (EPR) analysis, identified singlet oxygen ( 1 O 2 ) as the predominant reactive species governing OFL degradation. Critical to the activation mechanism were the synergistic redox cycles of surface-bound Ni 2+ /Ni 3+ and Co 2+ /Co 3+ couples, which facilitated continuous electron transfer for PMS activation. Furthermore, the catalyst exhibited robust reusability (>85 % efficiency retention after 3 cycles), multi-pollutant versatility, and remarkable environmental compatibility, as evidenced by the low ecotoxicity of treated effluents in phytotoxicity assays. These findings underscore the potential of De@NiCo-LDH as a sustainable and high-efficiency heterogeneous catalyst for advanced oxidation processes in antibiotic-contaminated water remediation.
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Chemosensors
·
2022
·Vol. 10
·期 11
·437
·
IF 4.229
Caiyun Jiang,Ting Wu,Xin He,Yuping Wang,Hong-zhen Lian
To this day, the preparation of surface-enhanced Raman spectroscopy (SERS) substrates with high sensitivity, selectivity, and stability has been the bottleneck to realizing SERS-based quantitative analysis in practical applications. In this paper, a thermo-sensitive imprinting SERS substrate material (TM@TiO2@Ag) is developed with a uniform structure and morphology, a controllable “hot spot” and photocatalytic regeneration. The as-prepared TM@TiO2@Ag nanocomposite is characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, dynamic light scattering, ultraviolet–visible (UV-Vis) spectroscopy, etc. After the effects of its thermo-sensitive property on localized surface plasmon resonance (LSPR) and SERS signals are investigated, this nanomaterial is used as the Raman-enhanced substrate for rapid and trace detection of ofloxacin (OFL) in water. It is found that, with the aid of unique structure and composition, temperature sensitivity, and molecule imprinting, the SERS sensor possesses considerably strong anti-interference ability not only to structure-unlike but also to structure-like co-existing substances, extremely low detectable concentration of 1.1 × 10−11M for OFL at 1397 cm−1, as well as excellent reusability due to its photocatalytic degradation to target analytes.Keywords:SERS;molecule imprinting;thermo-sensitive;recyclability;ofloxacin (OFL)
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Microbiology Spectrum
·
2022
·
IF 9.043
Lujun Yin,Ping-Ping Zhang,Wei Wang,Shi Tang,Shi-Ming Deng,Ai-Qun Jia
Serratia marcescens (S. marcescens) is an environmental bacterium that causes infections with high morbidity and mortality. Notably, infections caused by multidrug-resistant S. marcescens have become a global public health issue. Therefore, the discovery of promising compounds to reduce the virulence of pathogens and restore antibiotic activity against multidrug-resistant bacteria is critical. Quorum sensing (QS) regulates virulence factors and biofilm formation of microorganisms to increase their pathogenicity and is, therefore, an important factor in the formation of multidrug resistance. In this study, we found that 3-phenylpropan-1-amine (3-PPA) inhibited S. marcescens NJ01 biofilm formation and virulence factors, including prodigiosin, protease, lipase, hemolysin, and swimming. The combination of 3-PPA (50.0 μg/mL) and ofloxacin (0.2 μg/mL) enhanced S. marcescens NJ01 sensitivity to ofloxacin. Based on crystalline violet staining, scanning electron microscopy (SEM), and confocal laser scanning microscopy (CLSM), 3-PPA (50.0 μg/mL) reduced S. marcescens NJ01 biofilm formation by 48%. Quantitative real-time PCR (qRT-PCR) showed that 3-PPA regulated the expression of virulence- and biofilm-related genes fimA, fimC, bsmB, pigP, flhC, flhD, and sodB. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) indicated that 3-PPA affected intracellular metabolites of S. marcescens NJ01, leading to reduce metabolic activity. These results suggested that 3-PPA inhibits the pathogenicity of S. marcescens NJ01 by occluding QS. Thus, 3-PPA is feasible as an ofloxacin adjuvant to overcome multidrug-resistant S. marcescens and improve the treatment of intractable infections.IMPORTANCE Multidrug-resistant bacteria have become a major threat to global public health, leading to increased morbidity, mortality, and health care costs. Bacterial virulence factors and biofilms, which are regulated by quorum sensing (QS), are the primary causes of multidrug resistance. In this study, 3-PPA reduced virulence factors and eliminated biofilm formation by inhibiting QS in S. marcescens NJ01 bacteria, without affecting bacterial growth, thus restoring sensitivity to ofloxacin. Thus, the discovery of compounds that can restore antibiotic activity against bacteria is a promising strategy to mitigate multidrug resistance in pathogens.
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