RSC Advances
·
2025
·Vol. 15
·期 15
·11503-11510
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IF 4.6
Ping Li,Xiaolin Yue,Anhong Li,Can Cui,Lan Wang,Wenyuan Tan
Cobalt 2-methylimidazole (ZIF-67) has been broadly explored for its applications in the treatment of antibiotics in wastewater. However, ZIF-67 in powder form is difficult to recover. In the study, ZIF-67 and Polyvinylidene Fluoride (PVDF) were blended via electrospinning to prepare ZIF-67/PVDF membrane for adsorption of ciprofloxacin (CIP). The ZIF-67/PVDF membrane demonstrated outstanding adsorption efficiency for CIP, with a maximum adsorption capability of 4087.5 μg cm−2. The adsorption performance of ZIF-67/PVDF remains stable across a wide pH range and is unaffected by ionic interference. The ZIF-67/PVDF adsorbent follows pseudo-second-order kinetics and the Langmuir model. Furthermore, thermodynamic research indicates the adsorption of CIP is a spontaneous and exothermic process. It is proposed that the adsorption mechanism of CIP onto ZIF-67/PVDF involves electrostatic interactions, hydrogen bonding, π–π interactions, coordination bonding, and hydrophobic interactions.
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高影响因子
Aggregate
·
2025
·
IF 13.7
Yuge Wang,Lipei Ren,Yan Zhuang,Dongfang Liu,Zhixun Zhang,Lei Zhuo,Qian Zhang,Xiwei Guo,Xingfang Xiao,He Zhu
Photocatalysis is a renewable and eco-friendly process with great potential for the purification of ciprofloxacin (CIP) in water. However, conventional methods tend to focus on the design of photocatalysts, which pays less attention to the photothermal performance, resulting in a limited purification rate. Here, we propose a photothermal-photocatalytic textile based on carbon fiber felts decorated with homogeneous titanium dioxide films to efficiently purify CIP in water. The carbon fiber felts decorated with titanium dioxide films show high solar absorption (∼93 %) for solar water evaporation and simultaneous photocatalytic degradation for CIP purification. Notably, the enhancement of local wettability by titanium dioxide films on carbon fiber felts promotes photothermal efficiency. The carbon fiber felts decorated with titanium dioxide films demonstrate an evaporation rate of 1.19 kg m −2 h −1 , achieving an efficiency of 72.5 % under 1 sun. The experimental results reveal that the local thermal effect can effectively enhance catalytic degradation. CIP is almost completely degraded under sunlight, whereas the degradation efficiency under UV light is 55.8%. Specifically, we observe that CIP can be effectively degraded in purified water and condensed water. Moreover, the carbon fiber felts decorated with titanium dioxide films exhibit multidirectional degradation performance and stable physical and chemical properties, maintaining stable photothermal and photocatalytic performance even after prolonged sunlight exposure and repeated use. This work provides a paradigm for harnessing the abundant sunlight for antibiotic degradation.
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OZONE-SCIENCE & ENGINEERING
·
2018
·
IF 1.232
Shengtao Jiang,Jianzhong Zhu,Zibo Wang,Min Ge,Huayue Zhu,Ru Jiang,Enmin Zong,Yujiang Guan
The nanosized Fe3O4 catalyst was synthesized via a modified reverse coprecipitation method and characterized by means of a scanning electron microscope (SEM) and an X-ray diffraction (XRD) analysis instrument. The degradation efficiency and reaction rate of Fe3O4 in activating sodium persulfate used to degrade ciprofloxacin were determined from the catalyst dosage, oxidant concentration, and initial pH. The results showed that under the optimum conditions of a catalyst dosage of 2.0 g·L−1, a sodium persulfate concentration of 1.0 g·L−1, and an initial pH of 7, the degradation rate of ciprofloxacin was 93.73%, the removal rate of total organic carbon was 78%, and the first-order reaction constant was 0.06907 min−1 within 40 min. It was also demonstrated that the reactive oxygen species in the Fe3O4/sodium persulfate catalytic system were mainly composed of SO4– and supplemented by OH· and HO2· using probe compounds such as ethanol, tertiary butanol, and benzoquinone.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Ruihan Du,Shuyi Yu,Lu Kang,Longyun Li,Chunli Kang
Traditional water treatment methods still face limitations in addressing environmental and health concerns posed by antibiotic pollutants. Piezoelectric catalysis, as an emerging environmental remediation technology, demonstrates potential in this regard due to its highly efficient catalytic activity. Based on this, this study constructed a binary n-n Type-II heterojunction piezoelectric catalytic material, Bi 4 Ti 3 O 12 /MoS 2 (BTO/MS), for the efficient removal of ciprofloxacin (CIP). A series of BTO/MS composites were synthesized via a simple hydrothermal method, with the 5%BTO/MS composite exhibiting optimal piezocatalytic performance toward CIP: Under conditions of 100 W ultrasonication for 60 min, the removal rate of 10 mg/L CIP reached 94.46%, with an apparent reaction rate constant of 0.0539 min −1 . This represents a 3.46-fold and 17.39-fold increase over pure MoS 2 and pure Bi 4 Ti 3 O 12 , respectively. The composite structure effectively mitigated MoS 2 nanosheet agglomeration and suppressed electron-hole pair recombination via an n-n Type-II heterojunction, significantly enhancing the piezoelectric catalytic activity of 5%BTO/MS. Electron paramagnetic resonance (EPR) results indicate that singlet oxygen ( 1 O 2 ) and superoxide radical (·O 2 − ) are the dominant reactive oxygen species governing the piezoelectric catalytic degradation process. Simulations using T.E.S.T. software revealed that most intermediates exhibited reduced ecotoxicity compared to the parent compound CIP. Additionally, 5%BTO/MS demonstrated excellent catalytic performance in removing CIP from tap water and lake water matrices, as well as in degrading other organic pollutants, indicating the material's promising application potential in the field of piezoelectric catalytic water purification.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Jiaying Lu,Mingwei Wu,Faying Miao,Yanan Li,Ling Zhang,Caixia Feng,Li Wang,Yong Liu,Yanfeng Pu,Ruifeng Chong,Zhixian Chang
The photocatalytic degradation of refractory antibiotics still suffers from severe charge carrier recombination and thermodynamically limited oxygen activation. Herein, a hydroxyapatite/bismuth oxybromide (HAp/BiOBr) photocatalyst with a tight hetero-interface was designed for the degradation of ciprofloxacin (CIP), where a dual microenvironment regulation mechanism endowed by HAp was revealed to be responsible for the boosted catalytic activity of HAp/BiOBr. On the one hand, the spontaneous polarization of PO 4 3− groups in HAp generates a robust local built-in electric field (LEF) at the interface, which promotes the highly efficient spatial dissociation of photogenerated charges within BiOBr. On the other hand, unsaturated-coordinated Ca 2+ on HAp functions as Lewis acid active sites to in situ activate the interfacial dissolved oxygen (O 2 ), which effectively overcomes the thermodynamic limitation caused by the relatively positive conduction band of BiOBr for massive superoxide radical (·O 2 − ) generation. As a result, the optimized HAp/BiOBr achieves a 99.3% degradation efficiency of CIP in 60 min under visible light irradiation, with an apparent reaction rate constant 2.7 times higher than that of pure BiOBr. In addition, CIP degradation pathway and multidimensional ecotoxicity were analyzed. The results in this work not only provide a novel strategy utilizing polar dielectric materials to design highly efficient catalysts, but also supply a theoretical support for the removal of CIP contamination from water environments.
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2025
·
IF 6.1
Lirui Hou,Yuhan Fu,Yue Zhao,Chongshan Dai,Chong Zhao,Lihong Fan,Hongbo Hu,Shutao Yin
Ciprofloxacin (CIP) is a synthetic third-generation quinolone antimicrobial agent with broad-spectrum bactericidal activity and widely used in human and veterinary medicine. Some studies have shown that quinolone antibiotics are endocrine disruptors, but the effect of early-life exposure to CIP on testosterone production remains unclear. Using adolescent male C57BL/6 J mice (n = 6 per group) exposed to CIP (1–75 mg/kg) for 30 days, combined with in vitro models of mouse testicular cells (TM3, TM4, GC-2spd), this study investigated the toxic effects of CIP on testosterone synthesis. Animal studies showed that 1 mg/kg CIP significantly decreased serum testosterone levels and increased LH and FSH levels. With increasing doses of CIP, the sperm count of mice was significantly reduced and accompanied by tissue damage in the testes. Through Western blotting, qPCR, and molecular docking analyses, we identified StAR as the key protein mediating CIP-induced testosterone suppression. CIP was found to affect testosterone synthesis by influencing the expression of testosterone synthesis-related proteins in both in vivo and in vitro. Transcriptomic sequencing of pituitary tissues revealed dose-dependent alterations in genes related to GnRH secretion and cAMP signaling pathways. For the first time, we confirmed that CIP inhibits the transcription of StAR by downregulating NR4A1 expression, ultimately blocking testosterone synthesis. In TM3, TM4, and GC-2spd cells, all three cellular activities were inhibited with increasing concentrations of CIP, which causes S-phase cycle block in TM3 and G2/M-phase cycle block in TM4. The study demonstrates that CIP inhibits testosterone synthesis via the NR4A1/StAR pathway, suggesting CIP is an endocrine disruptor and implying low-dose CIP exposures cause more severe effects that should be of widespread concern.
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Toxics
·
2025
·Vol. 13
·期 10
·882
·
IF 4.1
Linzhi Lu,Rong Huang,Liang Wan,Guijia Li,Zhenhao Xu,Jiahao Guo
Ciprofloxacin (CIP), a widely used fluoroquinolone antibiotic, is frequently detected in aquatic environments, raising concerns over its ecological risks. In this study, the submerged macrophyteHydrilla verticillatawas employed to investigate its capacity for CIP removal and the associated ecotoxicological effects. A series of batch experiments were conducted to evaluate plant growth, photosynthetic efficiency, oxidative stress responses, CIP biodegradation pathways, and shifts in epiphytic microbial communities. Results showed that CIP significantly inhibited the growth ofH. verticillata, with inhibition rates of plant length and fresh weight reaching 15.8% and 29.7%, respectively, at 5 mg/L. Photosynthetic parameters were severely suppressed. Fv/Fm represented the maximum quantum efficiency of PSII, significantly decreased by 94.3% at 10 mg/L, while chlorophyll a and b contents declined by up to 36.1% and 31.2%, respectively, compared to control. Antioxidant responses showedH. verticillataundergo peroxidation damage. Biodegradation analysis revealed thatH. verticillataeffectively removed CIP from water, with maximum removal rates of 37% at 1 mg/L and 31% at 5 mg/L under high biomass (4.2 g) conditions. CIP accumulation was higher in stems than in leaves, and three biodegradation intermediates (C306, C263, and C248) were identified, suggesting a degradation pathway involving piperazine ring cleavage, de-ethylation, and deamination. High-throughput sequencing further indicated that CIP exposure reduced bacterial diversity and richness onH. verticillatasurfaces, while promoting antibiotic-resistant taxa such asActinobacteriaandBacteroidota. These findings highlight the potential role ofH. verticillatain antibiotic-contaminated water remediation.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Jie Wang,Yanbai Shen,Xiaoyu Jiang,Ruixue Ma,Haiyi Lv,Sikai Zhao,Cong Han,Wengang Liu
Interlayer engineering of mineral supports offers an effective yet still underexplored approach for regulating the electronic structure of semiconductor photocatalysts. In this study, an intercalation–mediated interface engineering strategy was proposed, in which g–C 3 N 4 were coupled with kaolinite pre–intercalated using small organic molecules to achieve directional modulation of the g–C 3 N 4 structure. Among the resulting composites, the potassium acetate–derived sample (CN/K–KL) uniquely enabled simultaneous K + incorporation and the formation of cyano groups, leading to rapid ciprofloxacin degradation (91.7%) within 60 min accompanied by a high ·O 2 − yield (41.08 μM). Mechanistic investigations combining density functional theory (DFT) calculations and experimental results revealed that these structural features improved charge separation, enhanced O 2 adsorption, and effectively lowered the kinetic energy barrier for H 2 O 2 activation, thereby enabling an efficient carrier–driven, metal–free, light–activated H 2 O 2 activation pathway. This work highlights the critical role of intercalation engineering in regulating mineral microenvironments and optimizing semiconductor charge kinetics, challenging the conventional view of minerals as supports. Moreover, it provides a rational design strategy for precise structural modulation of g–C 3 N 4 and the construction of high–performance, non–metallic photocatalytic systems.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Xuan Fu,Shovra Sarker,Weijia Ma,Weijie Zhao,Yan Rong,Qi Liu
The pollution of natural water bodies by pharmaceutical compounds has led to serious concerns regarding ecological and public health safety. In this study, novel recyclable phenylalanine (Phe)-modified magnetic ferroferric oxide nanoparticles (Fe 3 O 4 @Phe NPs) were successfully synthesized for the first time using a simple one-pot method to remove ciprofloxacin (CIP) from aqueous solutions. Fe 3 O 4 and Fe 3 O 4 @Phe NPs were characterized using different techniques, such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), Turbiscan analysis and vibrating-sample magnetometry (VSM). The results show that Fe 3 O 4 NPs are fully encapsulated by Phe, exhibiting an average diameter of 200 nm, a high specific surface area (35.79 m 2 g -1 ), good dispersion and superparamagnetic properties. The effects of Phe content, initial pH and ionic strength on CIP adsorption onto Fe 3 O 4 and Fe 3 O 4 @Phe NPs are investigated. The maximal adsorption capacity of CIP onto Fe 3 O 4 @Phe NPs is determined to be 49.27 mg g -1 . The adsorption kinetics and isotherms show that the adsorption process follows the pseudo-second-order-kinetic and Langmuir isotherm models, respectively. This indicates that the adsorption involves a rate-controlled monolayer chemisorption process. The regeneration experiments show that Fe 3 O 4 and Fe 3 O 4 @Phe NPs exhibit good reusability for CIP adsorption. Adsorption mechanisms include electrostatic interactions, hydrogen bonding, hydrophobicity and π-π interactions. This study presents a promising strategy for the design and preparation of multifunctional nanoparticles to remove contaminants from the environment.
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JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Feihan Yu,Wenxuan Wang,Yudong Li,Minshu Du,Feng Liu,Daxin Liang
TiO 2 is one of the most ideal photocatalytic materials, but its application is limited by many problems (e.g., wide band gap, easy carrier recombination). Co-catalyst with changes in valence could efficiently overcome the disadvantages above. Herein, a Fe species (Fe, Fe 2 O 3 )/TiO 2 was designed to fully utilize photogenerated charges and holes. The degradation rate of ciprofloxacin can reach 99.97%. In addition, its methane generation from photoreduction of CO 2 is 12.9 times than that of pure TiO 2 . These results are attributed to the well-designed catalyst including the combination of TiO 2 and FeO x as photocatalysts and oxygen buffers, and the dispersion of single-atom Fe clusters as cocatalysts and electron trap sites. The effect mechanism of Fe species on TiO 2 was verified by PBE DFT calculation. Finally, following a concept of thermodynamic-kinetic synergy, a new design strategy for photocatalysts is accordingly proposed, as such, the prepared catalyst is expected to be applied in the environmental remediation.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 32
·48522-48538
·
IF 5.19
Wang Guanghui,Li Yingjie,Dai Jialing,Deng Nansheng
In this present study, a novel indirect Z-scheme TiO 2 @g-C 3 N 4 @biochar (TiO 2 @g-C 3 N 4 @BC) composite photocatalyst was successfully fabricated and characterized with SEM, TEM, EDS, XRD, FTIR, PL, XPS, and UV–vis DRS. The photocatalytic degradation behavior of ciprofloxacin (CIP) on the TiO 2 @g-C 3 N 4 @BC was evaluated under UV–vis and visible light irradiation, and the possible reaction mechanism of photocatalytic oxidation of CIP on the TiO 2 @g-C 3 N 4 @BC was explained. The TiO 2 @g-C 3 N 4 @BC composite photocatalyst exhibited stronger photocatalytic oxidation activity for CIP in comparison with TiO 2 , g-C 3 N 4 , TiO 2 @BC, and TiO 2 @g-C 3 N 4 . After 60 min of UV–vis and visible light irradiation, the photocatalytic removal efficiency of CIP by TiO 2 @g-C 3 N 4 @BC was 99.3 and 89.2%, respectively. The photocatalytic removal performance of CIP was affected by the initial concentration of CIP, catalyst dosage, and pH value. The composite photocatalyst presented excellent stability and reusability after five cycles. An indirect Z-scheme principle of the CIP photocatalytic oxidation reaction on TiO 2 @g-C 3 N 4 @BC was clearly proposed, and the whole process of photocatalytic degradation was the results of the interaction between CIP and reactive active species (·O 2 − , h + , and ·OH), of which ·O 2 − is the main active substance. Four CIP degradation pathways were proposed. This work may provide an effective strategy to remove antibiotics in wastewater.
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JOURNAL OF POROUS MATERIALS
·
2022
·Vol. 29
·期 5
·1299-1308
·
IF 2.523
Gao Jianyang,Zheng Xiaolong,Meng Zilin,Feng Li
The application of layered double hydroxides (LDHs) in remediation was challenged by easy stack and aggregation. To enhance the performance of antibiotics removal capacities, LDHs was supported by vermiculite (VER) through in-situ method (VER–LDH). The structural characterization revealed that LDHs grew on VER surface and formed a three-dimensional structure. Kinetics studies showed that the removal of antibiotics well fitted pseudo-second-order model and intraparticle diffusion model, revealing that adsorption sites are the main factor for adsorption process. Site energy distribution of VER, LDHs and VER–LDH for antibiotics adsorption was estimated based on the equilibrium adsorption data. The energy distribution were determined and indicated that the heterogeneity of the adsorption site. The average site energy of composite material showed a higher value, manifesting a stronger interaction strength between the adsorbent and antibiotics. The excellent removal performance provided a promising strategy in sewage water remediation.
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