MATERIALS RESEARCH BULLETIN
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2021
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IF 4.641
Wen Huang,Yafei Li,Qianmin Fu,Ming Chen
The aggregation of MoS 2 nanoparticles and inefficient electron-migration limit their application for antibiotic removal. In this study, pomelo peel biochar (BC) with smooth surface structure was used as the matrix for loading nano-flower-like MoS 2 microspheres. The as-prepared nanocomposites were used to improve the removal efficiency of ciprofloxacin (CIP). A series of characterizations revealed that the optimal weight ratio of BC to MoS 2 was 3:35 (MoS 2 -BC 3/35 ). MoS 2 -BC 3/35 with narrow-bandgap (1.60 eV) possessed efficient light-utilization ability and the photodegradation efficiency toward CIP was 92.01%, whereas the CIP removal efficiency by MoS 2 was 44.50%. The improvement of this efficiency was attributed to the reduction of electron-hole pairs recombination. More attractively, superoxide radical (·O 2 − ) played a major role during the photocatalytic reaction, because the conduction band potential of MoS 2 -BC 3/35 (-0.81 eV) is lower than the potential of O 2 /·O 2 − (-0.33 eV). Overall, MoS 2 -BC 3/35 is a promising photocatalyst owing to its eco-friendliness, high-efficiency and easy-preparation.
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高影响因子
Scientific Reports
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2024
·Vol. 14
·期 1
·1-13
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IF 3.8
Liu Tonglinxi,Liu Wen,Li Xinyue,Wang Hanyu,Lan Yushan,Zhang Shengmin,Wang Yujun,Liu Huiqing
Antibiotics, as emerging persistent pollutants, pose significant threats to human health. The effective and low-cost removal of ciprofloxacin (CIP) from wastewater has become an important research focus. In this study, fly ash (FA) was used as the raw material, and modified fly ash (MFA) was prepared by varying microwave power, alkali concentration, and immersion time to investigate its adsorption characteristics for CIP. Results showed that the optimal preparation conditions for MFA with the most effective adsorption of CIP, using the Box-Behnken response surface methodology, were a microwave power of 480 W, an alkali concentration of 1.5 mol/L, and a modification time of 3 h. Scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction analyses revealed that after modification, the glassy structure of FA is destroyed, the specific surface area is increased, and obvious hydroxyl O–H absorption peaks appear. Both FA and MFA exhibited adsorption processes for CIP that conformed to pseudo-second-order kinetics and the Langmuir equation. Maximum adsorption of CIP (9.61 and 12.67 mg/g) was achieved at pH = 6. With increasing temperature, the adsorption capacity of both FA and MFA for CIP decreased, indicating an exothermic process. The adsorption capacity of CIP decreased with increasing ion concentration, with the impact order of ions being Al 3+ > Ca 2+ > Na + . The results show that pore filling, electrostatic interaction, ion exchange and complexation are the main ways of CIP adsorption by FA. Microwave alkali modified fly ash is an economical and efficient adsorbent for CIP removal in water, realizing the purpose of “treating waste with waste”. This study provides a scientific basis for controlling CIP treatment in wastewater.
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PubMed
高影响因子
ACS Nano
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2024
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IF 15.8
Xinyu Shan,Yichao Lu,Zhenyu Luo,Xiaoqi Zhao,Mei Pang,Hang Yin,Xuemeng Guo,Huanli Zhou,Junlei Zhang,Jiaxin Huang,Yingying Shi,Jinfang Lou,Lihua Luo,Jian You
Numerous evidence has demonstrated that the brain is not an immune-privileged organ but possesses a whole set of lymphatic transport system, which facilitates the drainage of harmful waste from brains to maintain cerebral homeostasis. However, as individuals age, the shrinkage and dysfunction of meningeal and deep cervical lymphatic networks lead to reduced waste outflow and elevated neurotoxic molecules deposition, further inducing aging-associated cognitive decline, which act as one of the pathological mechanisms of Alzheimer’s disease. Consequently, recovering the function of meningeal and deep cervical lymph node (dCLNs) networks (as an important part of the brain waste removal system (BWRS)) of aged brains might be a feasible strategy. Herein we showed that the drug brain-entering efficiency was highly related to administration routes (oral, subcutaneous, or dCLN delivery). Besides, by injecting a long-acting lyotropic liquid crystalline implant encapsulating cilostazol (an FDA-approved selective PDE-3 inhibitor) and donepezil hydrochloride (a commonly used symptomatic relief agent to inhibit acetylcholinesterase for Alzheimer’s disease) near the deep cervical lymph nodes of aged mice (about 20 months), an increase of lymphatic vessel coverage in the nodes and meninges was observed, along with accelerated drainage of macromolecules from brains. Compared with daily oral delivery of cilostazol and donepezil hydrochloride, a single administered dual drugs-loaded long-acting implants releasing for more than one month not only elevated drug concentrations in brains, improved the clearing efficiency of brain macromolecules, reduced Aβ accumulation, enhanced cognitive functions of the aged mice, but improved patient compliance as well, which provided a clinically accessible therapeutic strategy toward aged Alzheimer’s diseases.
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PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2025
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IF 4.7
Longjie Xiao,Hongkui Zhang,Xue Song,Yongde Liu,Jie Zhang,Feiyue Wang,Guihua Yan,Han Zhang,Tianzeng Jin,Jihong Zhao
This study investigated the competitive adsorption behavior and underlying mechanism of a potassium carbonate-activated sycamore flocculent biochar (KBC-SF) for the simultaneous removal of oxytetracycline hydrochloride (OTC-HCl) and ciprofloxacin (CIP) from aqueous environments. The structural and surface properties of KBC-SF were comprehensively characterized using SEM, FTIR, Raman spectroscopy, XPS, and N 2 adsorption–desorption analysis (BET). OTC-HCl and CIP concentrations quantified by validated UV–Vis spectrophotometry. The biochar exhibited a high specific surface area (1651 m 2 /g) and abundant oxygen-containing functional groups. In binary systems, maximum adsorption capacities at 45 °C reached 533 mg/g for OTC-HCl and 366 mg/g for CIP, which were substantially lower than those in single-solute systems, indicating significant competitive antagonism with OTC-HCl showing stronger affinity. The adsorption followed pseudo-second-order kinetics and was best described by the Freundlich isotherm, suggesting multilayer chemisorption. Thermodynamic parameters confirmed that the process was spontaneous and endothermic. Despite moderate interference from coexisting ions (e.g., Al 3+ , CO 3 2− ) and various real water matrices, KBC-SF maintained nearly complete removal efficiency. The adsorption process was dominated by π–π electron donor–acceptor (EDA) interactions, hydrogen bonding, and pore filling. These findings highlighted the excellent applicability and robustness of KBC-SF for removing coexisting antibiotics in complex aquatic environments.
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DESALINATION
·
2025
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IF 9.8
Silin Li,Wenjie Zheng,Wenlan Ji,Yunfei Shi,Tian Ren,Shihao Zhang,Xiao Wei,Yibin Wei
Catalytic ceramic membranes with ozonation have been considered promising for efficient organic pollutants degradation in water. Herein, cerium oxide-doped silicon carbide (Ce@SiC) ceramic membranes were developed via in-situ embedding CeO 2 nanoparticles into the porous SiC membrane that can be coupled with catalytic ozonation for efficient ciprofloxacin (CIP) degradation. Notably, the optimized Ce@SiC membrane with ozonation could achieve 94.3 % CIP degradation efficiency within 60 min, outperforming ozonation (63.4 %) or pristine SiC (66.1 %) alone. Meanwhile, the membrane showed excellent total organic carbon mineralization of 66.4 % for the CIP, which was significantly higher than that of using ozonation (19.8 %) or pristine SiC (30.1 %) alone, demonstrating enhanced oxidation efficiency. The high performance is attributed to the abundant oxygen vacancies on the Ce@SiC membrane surface, which facilitate ozone decomposition into hydroxyl ( OH) and superoxide ( O 2 − ) radicals, and the synergistic effect of the Ce 3+ /Ce 4+ redox cycle. The membrane not only exhibited robust catalytic stability in cycling experiments, but also excellent resistance to ion interference. Furthermore, the high catalytic performance was mainly attributed to the rich oxygen vacancies on the Ce@SiC membrane surface, which facilitates ozone decomposition into OH and O 2 − . This work offers a sustainable strategy of coupling catalytic ozonation with ceramic membrane for refractory antibiotics degradation.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
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IF 4.7
Faxiang Feng,Zanming Zhu,Jiale Li,Shi Su,Guilin Dong,Guanhui Wang,Xiaobing Liu,Runlin Han
The widespread use and even abuse of antibiotics has led to antibiotic wastewater posing a serious threat to global human health. However, due to its poor biodegradability, the effectiveness and cost of traditional wastewater treatment technologies in the field of antibiotic wastewater treatment remain challenging. This study introduces BiCl₃ into a polyimide (PI) solution and employs electrospinning technology to fabricate PI fiber membranes with high BiOCl loading in-situ, demonstrating outstanding photocatalytic performance. The photocatalytic performance of PI/BiOCl nanocomposite membrane was investigated in detail and the mechanism of photocatalytic degradation was explored. Experimental results demonstrate that the nanocomposite membrane exhibited excellent hydrophilicity. It exhibits significant efficacy in degrading tetracycline hydrochloride (TC). Under UV irradiation, it achieves a photodegradation efficiency of 99.3 % for TC within 8 h. After five cycles, the membrane maintained over 90.3 % degradation efficiency for TC, with photodegradation efficacy declining by only 9.1 %. It was found that the photocatalytic degradation of TC was mainly induced by superoxide radical (·O 2 − ). The membrane exhibits excellent stability, recoverability, and reusability, sustaining consistent degradation performance during prolonged operation. This approach offers a novel perspective for future research into developing more efficient and environmentally friendly materials for degrading tetracycline hydrochloride.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Runlin Han,Faxiang Feng,Zanming Zhu,Shi Su,Jingjing Wang,Chuxuan Shi,Guilin Dong,Hongbo Gu
The development of photocatalytic membranes with high efficiency for the treatment of organic pollutants such as dyes and antibiotics is essential due to the complexity of the harmful components in the wastewater. In this work, the cellulose acetate/bismuth oxychloride (CA/BiOCl) nanocomposite membrane was in-situ generated by the immersion phase inversion method for photocatalytic degradation of antibiotics and photoresponsive antibiosis. The results show that this CA/BiOCl nanocomposite membrane exhibits an excellent hydrophilicity with a water contact angle of 38.9° and a water flux of 2.66 × 10 4 L (m –2 h –1 bar –1 ). It depicts a high efficiency for the photocatalytic degradation of 97.6 % of tetracycline (TC) within 11 h. Effects of initial TC concentration and pH of solution on the performance of membrane are studied in detail. The membrane also demonstrates a superb cyclic stability, and the degradation efficiency remains 93.6 % after five cycles of recycling. It is found that the photocatalytic degradation of TC is mainly induced by superoxide radicals (·O 2 – ) and holes (h + ). Besides, the membrane also exhibits good photoresponsive antimicrobial properties under light irradiation. Our work provides novel insights on the multifunctional BiOCl-based materials for wastewater treatment.
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