ANALYTICA CHIMICA ACTA
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2021
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IF 6.558
Weihang Wang,Chi Zhang,Jiaxin Guo,Gaiping Li,Baoxian Ye,Lina Zou
Here, we developed a homogeneous electrochemical biosensor for the sensitive determination of antibiotic by the CHA reaction and the consecutive adenine mediated probe fixation. The binding of target to the target recognition sequences in the triple-helix DNA can release the trigger. It can initiate the catalytic hairpin assembly (CHA) to generate lots of mimic targets, which were labeled with electroactive substance ferrocene (Fc). Because the generated mimic target has consecutive sequence of adenines (PolyA), they can be self-assembled on the AuNPs modified electrode and finally realize electrochemical detection . Under optimal conditions, this developed biosensor achieved a satisfactory limit of detection of 0.089 nM (S/N = 3) and a linear range from 0.1 nM to 100 nM for sensitive detection of oxytetracycline with good specificity. The whole process is carried out in homogeneous solution, not only realizes signal amplification, but also avoids the complex modification process of electrode surface. Compared with some reported electrochemical sensors , the method is easier to operate and has good precision.
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高影响因子
CHEMOSPHERE
·
2018
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IF 4.427
Jian Sun,Wenjing Xu,Ping Yang,Nan Li,Yong Yuan,Hongguo Zhang,Yujie Wang,Xunan Ning,Yaping Zhang,Kenlin Chang,Yenping Peng,Kufan Chen
Photo-bioelectrochemical fuel cell (PBFC) represents a promising technology for enhancing removal of antibiotic pollutants while simultaneously sustainable transformation of organic wastes and solar energy into electricity. In this study, simultaneous antibiotic removal and bioelectricity generation were investigated in a PBFC with daily light/dark cycle using oxytetracycline (OTC) as a model compound of antibiotic. The specific OTC removal rate increased by 61% at an external resistance of 50 Ω compared to that in the open-circuit control, which was attributed to bioelectrochemically enhanced co-metabolic degradation in the presence of the bioanode. The OTC removal was obviously accelerated during illumination of cathode in contrast with a dark cathode due to the higher driving force for anodic bioelectrochemical reaction by using photosynthetic oxygen as cathodic electron acceptor during illumination than that using nitrate in dark. The bioelectrocatalytic activity of anodic biofilm was continuously enhanced even at an initial OTC concentration of up to 50 mg L −1 . The degradation products of OTC can function as mediators to facilitate the electron transfer from bacteria to the anode, resulting in 1.2, 1.76 and 1.8 fold increase in maximum power output when 10, 30 and 50 mg L −1 OTC was fed to the bioanode, compared to the OTC-free bioanode, respectively. The OTC feeding selective enriched OTC-tolerant bacterial community capable of degrading complex organic compounds and producing electricity. The occurrence of ARGs during bioelectrochemical degradation of OTC was affected more greatly by the succession of the anodic bacterial community than the initial OTC concentration.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2018
·
IF 5.091
Ling Cheng,Yulu Tian,Jingdong Zhang
A p-n heterojunction film of Cu 2 O/α-Fe 2 O 3 was constructed by electrodepositing p-type Cu 2 O microcubes on liquid phase deposited film of n-type α-Fe 2 O 3 . The surface morphology , the crystal phase and composition of Cu 2 O/α-Fe 2 O 3 heterojunction film were characterized by scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The enhanced absorption in the visible light region was observed in UV–visible diffuse reflectance spectra. Meanwhile, an efficiently improved separation and faster transfer of photogenerated electrons and holes were revealed by photoluminescence spectra and electrochemical impedance spectra. The Cu 2 O/α-Fe 2 O 3 p-n heterojunction was applied to photoelectrocatalytic degradation of oxytetracycline at a bias potential of +0.5 V under visible light illumination. After 60-min photoelectrocatalytic treatment, 73.3% of oxytetracycline was removed and the degradation rate constant reached 2.14 × 10 −2 min −1 . Moreover, the crystal phases and compositions for the used and fresh Cu 2 O/α-Fe 2 O 3 films were studied, and a possible photoelectrocatalytic mechanism was proposed.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2018
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IF 6.434
Na Li,Long Zhou,Xiaoying Jin,Gary Owens,Zuliang Chen
In this paper, a Zeolite Imidazole Framework-8 (ZIF-8), was investigated for the removal of a mixture of two common antibiotics, tetracycline (TC) and oxytetracycline hydrochloride (OTC). Batch experiments showed that 90.7% of TC and 82.5% of OTC were simultaneously removed using ZIF-8. The maximum adsorption capacities for TC and OTC were 303.0 and 312.5 mg g −1 , respectively. For both antibiotics’ adsorption followed pseudo-second-order kinetics and best fit the Langmuir adsorption model with R 2 of 0.963 and 0.981, for TC and OTC at 303 K, respectively. The relatively large specific surface area of ZIF-8 (1158.2 m 2 g -1 ) combined with scanning electron microscopy (SEM) and transmission electron microscopy (TEM) indicated that both antibiotics were adsorbed on to the surface of ZIF-8. X-ray powder diffraction (XRD) and Fourier Transform Infrared (FTIR) spectroscopy both indicated the presence of benzene ring structures, associated with both pollutants, on ZIF-8 after reaction; which confirmed adsorption was occurring. XPS also showed the presence of C O double bonds on the surface of ZIF-8 indicating the presence of antibiotics. The adsorption mechanism most likely involved π-π interactions between the conjugated groups in TC/OTC and the imidazole rings of ZIF-8.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
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IF 4.1
Tian Deng,Haonan He,Li Zeng,Hongbin Wang,Qinghua Zou,Xiaobo Gong,Mingchao Sun,Yong Liu,Junfeng Zhao
Peroxymonosulfate (PMS) based advanced oxidation methods have gained attention for eliminating antibiotics like oxytetracycline (OTC) from wastewater. This study presents an innovative approach by incorporating oxygen vacancies (OVs) into CuFe 2 O 4 to create OVs-CuFe 2 O 4 materials. Compared to traditional CuFe 2 O 4 , OVs-CuFe 2 O 4 offered superior catalytic performance due to its surface-rich OVs promoting rapid conversion of oxygen and efficient metal redox of Fe(Ⅱ)/Fe(Ⅲ) and Cu(Ⅰ)/Cu(Ⅱ). OVs-CuFe 2 O 4 /PMS achieved impressive 95.7 % OTC removal in 45 min with a rate constant of 0.107 min −1 , which was 3.87 times of CuFe 2 O 4 /PMS. The OVs-CuFe 2 O 4 /PMS system exhibited a broad pH tolerance range of 3 to 11 with OTC removal efficiency above 89.3 %. The OVs-CuFe 2 O 4 /PMS system produced various free radicals and non-radical for OTC degradation. The OVs-CuFe 2 O 4 also has good stability with removal efficiency of 81.9 % at fourth cycle. This research gives a strategy to construct oxygen vacancies enrich catalysts for efficient activation of PMS and treatment of antibiotics wastewater.
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JOURNAL OF SOLID STATE CHEMISTRY
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2024
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IF 3.2
Yi Wang,Tao He,Siying Lv,Jing Yang,Shihai Cui
Novel type of micro mesoporous materials Co-doped NH 2 -UiO-66 had been successfully prepared. The properties of the material were understood through a series of characterization. When the dosage of Zr:Co is 2:1, the modified material showed specific surface area of 840.02 m 2 ∙g −1 , which is larger than the material without Co. Especially, the material was transformed from microporous NH 2 -UiO-66 to micro-mesoporous Co-doped NH 2 -UiO-66 through the adjustment of metal Co. The Co-doped nanocomposite was then applied to the adsorption of oxytetracycline. The effects of initial concentration, pH, humic acid and ionic strength on the adsorption were investigated. It was found that 50 mg∙L −1 oxytetracycline can be effectively adsorbed by Co-doped NH 2 -UiO-66 in pH 7. Further research showed that adsorption was pseudo-second-order kinetics and fitted Freundlich model with the maximum adsorption capacity 223.7 mg∙g −1 . In addition, the adsorption equilibrium time was only 2 h, which is shorter than the adsorption time of most adsorbents. The mechanism of pore adsorption, π-π interaction, hydrogen bonds and electrostatic interactions was deeply discussed. In conclusion, Co-doped NH 2 -UiO-66 was a fast and effective absorbent for the removal of oxytetracycline in aqueous solution.
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Nano Research
·
2024
·Vol. 17
·期 7
·5863-5871
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IF 9.5
Ke Yanjing,Zhang Jiaxing,Peng Xin,Zhang Zhiyi,Wang Xu,Qi Wei,Wang Mengfan
Recently, many efforts have been dedicated to construct artificial catalysts with enzyme-like activity. However, it is still a big challenge to endow artificial catalysts with specific substrate selectivity. In this study, we developed a facile strategy to construct a MIL-53(Fe)-based nanocatalyst with designable selectivity in the degradation of oxytetracycline (OTC). Through the Fe–O–P conjunction, oxytetracycline aptamer (OA) can be easily anchored on MIL-53(Fe) to provide the specific site for OTC binding. We verified that the obtained MIL-53(Fe)-Apt nanocatalyst displayed enhanced catalytic ability in the degradation of OTC, whereas obvious suppression toward other substrate analogues. This performance therefore brings about an anticipated selectivity toward OTC. Moreover, we highlighted that the configuration of aptamers on MIL-53(Fe) can be modulated through varying conjunction mode. Structure–function analysis revealed that aptamer configuration affects the local concentration of substrate around catalytic site, which thus decides the catalytic performance toward OTC. This work presented a facile and promising strategy for developing artificial catalysts with designable selectivity.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2024
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IF 6.9
Zheng Liu,Daolong Zhang,Rongmei Mou
Photocatalytic degradation is an effective strategy for the removal of environmental pollutants. However, the development of low-cost and high-efficiency photocatalysts continues to present a significant challenge. This work reported the fabrication of a composite photocatalyst directly from waste biomass (rice hulls) in a single step, which efficiently degraded oxytetracycline (OTCs) under sunlight. The morphology, microstructures and photoelectric features of the fabricated materials were subjected to comprehensive investigation using characterization techniques. The results found that the improved photocatalytic activity in sunlight was attributed to the complexation of rice hull-derived biochar and nano-ZnO generated in the preparation, which exhibited favourable adsorption, conductivity characteristics and small bandgap. The photocatalytic efficiency was observed to reach 72.6 % in 120 min under the irradiation of a 100 W xenon lamp. The effect of natural waters, degradation kinetics and degradation TOC analysis were also examined. The dominant agent responsible for the degradation of OTCs was the •O 2 − radical. Furthermore, the principal photocatalytic degradation pathway of OTCs was identified with the assistance of UHPLC/MS.
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Journal of Environmental Chemical Engineering
·
2024
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IF 7.4
Jieli Ou,Yiqing Liu,Linyue Zhang,Zhenran Wang,Yuqi Tang,Yongsheng Fu,Dandan Zhao
Although Cu(II)/peroxymonosulfate (PMS) process has been successfully applied to degrade varied organic contaminants in water, the slow transformation of Cu(II) to Cu(I) that works only in alkaline conditions retards the treatment efficiency of this process. In this study, a new finding was observed, that is, oxytetraczdycline (OTC) could effectively enhance the degradation of organic pollutants in Cu(II)/PMS process where it was also removed in acidic conditions. With the addition of OTC in Cu(II)/PMS system, 85.5% of rhodamine B (RhB) was degraded in 90 min at pH 4.0, which was far more than that without OTC (36.1%), and simultaneously 98.1% of OTC was eliminated. The added OTC could form OTC-Cu(II) complexes which might powerfully improve the reduction of Cu(II) to Cu(I), exerting a positive effect on the PMS activation and subsequent degradation of RhB. Electron paramagnetic resonance (EPR) experiments assisted with radical scavenging experiments and Raman spectrum detection results suggested that Cu(III) and hydroxyl radical (HO • ) were the predominant reactive species for RhB degradation, while OTC removal in this system was mainly ascribed to direct PMS oxidation. The Cu(II)/PMS process also showed a promising success on the synergistic degradation of OTC with the other four refractory organic pollutants , indicating the potential application of PMS oxidation in water treatment .
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高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Aying Wen,Kexin Chi,Changjian Li,Shaofeng Yuan,Hang Yu,Yahui Guo,Weirong Yao
Oxytetracycline (OTC) residues in milk spontaneously bind to casein, forming casein-OTC complexes that complicate their removal. This study assessed the degradation effect of pulsed electric field (PEF) treatment on OTC, with a particular focus on its protein-bound form. Casein-bound OTC was successfully prepared, and the effectiveness of PEF in removing casein-bound antibiotics was confirmed using DESI-MSI technology. Under optimal treatment conditions, the degradation rates of OTC in casein-free whey (86.30 % – 93.43 %) and milk (82.47 % – 90.31 %) showed no significant difference, further confirming that the removal efficacy of PEF on OTC was unaffected by casein binding. The degradation of OTC in both matrices followed the Hülsheger model. Four major degradation products were identified, involving three distinct pathways: epimerization, demethylation, and deamidation. Furthermore, cytotoxicity assays demonstrated that PEF treatment significantly reduced the overall toxicity of OTC in milk. This study provides an effective and safe strategy for removing OTC residues from milk.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·Vol. 14
·期 1
·120853
·
IF 7.2
Shuang Li,Jiayu Wang,Xin Zhou,Tanzeel Riaz Ahamd,Fenglin Tang,Xiupei Yang
The widespread contamination of water resources by oxytetracycline (OTC) originating from medical and agricultural applications has necessitated the development of efficient remediation technologies. This study addresses this challenge by developing a ytterbium-doped bismuth-based metal-organic framework (Yb/Bi-MOF) through solvothermal synthesis, which integrates adsorption and photocatalytic degradation to achieve enhanced OTC removal. Yb-doped Bi-MOF composite (Yb 3 /Bi-MOF) demonstrating exceptional performance by achieving an adsorption capacity of 34.71 mg/g and 91.31 % photocatalytic degradation efficiency under xenon lamp illumination, significantly surpassing pristine Bi-MOF. Comprehensive characterization using XRD, XPS, and UV-Vis DRS revealed that optimal Yb³⁺ doping effectively narrowed the band gap to 3.82 eV, enhanced light absorption, and facilitated charge carrier separation while maintaining structural stability. The material’s superior performance was attributed to its increased specific surface area (4.75 m²/g vs 1.76 m²/g for Bi-MOF), reduced charge transfer resistance, and efficient generation of reactive oxygen species. Through radical scavenging experiments, it has been demonstrated that superoxide anion radicals (•O₂⁻) and holes (h⁺) are the primary active species. It is noteworthy that the Yb₃/Bi-MOF exhibits exceptional practicality, demonstrating stable performance across diverse water samples including rivers and lakes. After eight consecutive cycles, it maintained an 70 % removal efficiency. LC-MS analysis elucidated the pathway for the complete degradation of OTC into non-toxic intermediates. These findings not only offer a promising bifunctional material for antibiotic wastewater treatment but also provide valuable insights for the rational design of lanthanide-doped MOF photocatalysts, highlighting the immense potential of combining adsorption with photocatalysis for efficient environmental remediation.
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Desalination and Water Treatment
·
2015
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IF 1.173
Longbao Yu,Yanfeng Tang,Xinlin Liu,Changchang Ma,Pengwei Huo,Jianming Pan,Weidong Shi,Yongsheng Yan
The Cadmium sulfide (CdS) microsphere photocatalysts with the cauliflower-like morphology have been synthesized by hydrothermal method. The as-prepared photocatalysts have been characterized by powder X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray analysis, UV–vis absorption (UV–vis), and the thermo-gravimetric analysis. The UV–vis measurements show that the CdS microsphere prepared with 2 h have a band gap about 2.13 eV, which is smaller than the reported 2.42 eV, thus the as-prepared photocatalysts can be easily photoexcited and exhibit better photocatalytic performance. The photo-degradation experiments have been performed with CdS photocatalysts prepared with various synthesis conditions. Particularly, the CdS microsphere photocatalysts show the highest degradation ratio (72.78%) of Oxytetracycline hydrochloride under the visible light irradiation.
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