WATER SCIENCE AND TECHNOLOGY
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2022
·Vol. 86
·期 10
·2718-2731
·
IF 2.43
Wang Bo,Cao Xuan,Li Shifeng,Yao Shuhua,Wang Haibo
Nickle-copper ferrite (Ni 0.5 Cu 0.5 Fe 2 O 4 ) supported on activated carbon (AC) (AC@Ni 0.5 Cu 0.5 Fe 2 O 4 ) was synthesized and used as adsorbent, photocatalyst, and activator of peroxydisulfate (PDS) to realize the removal of ciprofloxacin (CIP). AC@Ni 0.5 Cu 0.5 Fe 2 O 4 properties were characterized by scanning electron microscope equipped with energy-dispersive X-ray (SEM-EDX), X-ray diffraction (XRD), N 2 adsorption-desorption isotherm plot of Brunauer-Emmett-Teller (BET) and Barrett-Joyner-Halenda (BJH), vibrating sample magnetometer (VSM). A rapid removal rate (94.30%) of CIP was achieved on AC@Ni 0.5 Cu 0.5 Fe 2 O 4 /PDS/UV system with the condition of catalyst dosage 0.30 g/L, initial pH 7.3, PDS addition 0.20 mM, CIP concentration 10 mg/L (200 mL), UV 28 W, in 30 min. Free radical quenching experiments indicate that reactive species of superoxide (·O 2 − ), holes (h + ), sulfate radicals (SO 4 − ·) and hydroxyl radicals (·OH) were produced and all worked. The reusability test demonstrated that AC@Ni 0.5 Cu 0.5 Fe 2 O 4 could be recycled five times with minimal performance reduction for the removal of CIP. The XRD and SEM of the after used AC@Ni 0.5 Cu 0.5 Fe 2 O 4 did not change significantly, which further showed its stability and recyclability. This work might provide new insight into the application of AC@Ni 0.5 Cu 0.5 Fe 2 O 4 in photocatalysis coupled with adsorption in peroxydisulfate assisted system and has high potential in CIP removal. AC@Ni 0.5 Cu 0.5 Fe 2 O 4 was synthesized by a simple co-precipitation method. AC@Ni 0.5 Cu 0.5 Fe 2 O 4 has a large specific surface area and thus can provide more reaction sites. AC@Ni 0.5 Cu 0.5 Fe 2 O 4 can be used as adsorbent, photocatalyst, and activator of peroxydisulfate. AC@Ni 0.5 Cu 0.5 Fe 2 O 4 displayed an excellent recyclability.
研究领域:
环境科学
·
材料科学
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化学工程
·
水处理技术
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DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Lingxiang Zhao,Xinyue Cheng,Zhaoxian Wang,Enzhe Zhang,Zilian Liu,Huajing Zhou,Liang He,Qingqing Guan
Although alkaline sulfite activation of ferrate (Fe(VI)) has advantages of fast response and high activity for degradation of organic contaminants , the specific production pathways of active species and the pH conditions still hinder its widespread application. Based on this, our study constructed a novel advanced oxidation process of calcium sulfite (CaSO 3 ) could activated Fe(VI) continuously by Ca 2+ buffering and investigated the mechanism under different pH values and CaSO 3 dosages with ciprofloxacin as a target organic pollutant. The results showed that Ca 2+ stabilized the process at a neutral/weakly alkaline microenvironment of pH 7–8, which could alleviate the hydrolysis of ≡Fe IV =O by protons and iron hydroxyl groups. Besides, the removal of pollutants occurred efficiently when sulfate (SO 3 2− ) was excessive and had a 3:1 ratio of SO 3 2− to Fe(VI), achieving more than 99% removal of electron-rich phenolic organic pollutants within 2 min. By adding different radical scavengers and combining electrochemical analysis methods and electron paramagnetic resonance spectroscopy techniques to revealed that the main active species in Fe(VI)/CaSO 3 process were ≡Fe IV =O/≡Fe V =O. Furthermore, the reactivity of various sulfate species (such as SO 3 2− , SO 3 •− , SO 4 •− , SO 5 •− ) with Fe(VI) was calculated using density functional theory (DFT), and it was found that Fe(VI)–SO 3 2− reaction has a much lower energy barrier (−36.08 kcal/mol), indicating that SO 3 2− can readily activate Fe(VI) and generate ≡Fe IV =O to attack the atoms with high Fukui index (f - ) in organic pollutants. The above results confirm the feasibility of Fe(VI)/CaSO 3 process. Thus, this study can theoretically and practically prove that the main active species is ≡Fe IV =O, rather than SO 4 •− or • OH in Fe(VI)/CaSO 3 process.
研究领域:
环境科学
·
化学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jin Xu,Guanhao Jiao,Guo Sheng,Naipeng Lin,Bingjie Yang,Jinfeng Wang,Hu Jiang,Yin Wang,Xiaodong Zhang
The LaFe 0.5 Cu 0.5 O 3 perovskite synthesised by MOFs template method was compounded with Mxene Ti 3 C 2 , and the novel catalyst M-Ti 3 C 2 /LFCO-P was subsequently prepared by phosphoric acid etching. This catalyst effectively induced microwave activation of peroxymonosulfate (PMS), and ciprofloxacin (CIP) was efficiently degraded with a degradation rate reaching 95.48 % within 14 min. Characterization results revealed that the MOFs template method and phosphoric acid etching increased specific surface area (from 25.91 m 2 /g to 142.41 m 2 /g) of catalyst and improved its pore size distribution. Phosphoric acid etching successfully introduced phosphorus functional groups and promoted the formation of more oxygen vacancies, thereby significantly enhancing the catalytic activity of the catalyst. The conversion of free radicals and the transformation of free radicals to non-free radicals were demonstrated. Additionally, the catalyst exhibited higher electron transfer efficiency. The catalytic reaction was primarily driven by O 2 – and 1 O 2 , with OH, SO 4 − , and e - playing auxiliary roles. Furthermore, the degradation pathway and toxicity of CIP were also evaluated. This work provides a new perspective for improving the catalytic degradation activity of antibiotics by perovskite catalysts.
研究领域:
环境科学
·
催化化学
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DOI
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2021
·
IF 2.993
Zhigang Xu,Jingheng Du,Jun Wang,Zhihong Chen,Wenjun Li,Chuanbin Wang,Qiang Shen
In this work, CIP@SiO 2 , CIP@SiO 2 @ZrO 2 and CIP@void@ZrO 2 microspheres were fabricated as model samples of the core-single-shell, core-double-shell and yolk-shell absorbents to systematically compare the role of different coating structures for microwave absorption properties and offer a comprehensive reference to the rational structural design for microwave absorbents. Microstructures, magnetic properties, electromagnetic parameters and microwave absorption of different absorbents were studied. The electromagnetic absorption performance of the as-prepared multicomponent hierarchical microspheres was superior to the sole CIP, owing to the combination of strong magnetic loss of CIP core and excellent dielectric loss of SiO 2 and ZrO 2 shell. For core-double-shell CIP@SiO 2 @ZrO 2 microspheres, the minimum RL was −20.69 dB at 17.44 GHz with a thickness of 1.7 mm and the effective absorption bandwidth can reach 6.48 GHz at the coating thickness of 2 mm. It is noted that the initial oxidation temperature of CIP increased by ∼200 ℃ owing to the presence of dense SiO 2 intermediate layer. Inspiringly, the minimum RL of yolk-shell CIP@void@ZrO 2 microspheres was up to −28.38 dB at the absorber thickness of 2.2 mm and the effective absorption bandwidth reach 7.44 GHz from 10.24 to 17.68 GHz at 2.1 mm thickness. The yolk-shell structure had better absorbing performance than the core-shell structure because the cavity as the intermediate layer improved impedance matching. We believed that this work would provide a valuable reference for structural design and optimization of the high-performance absorbing materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Ya-li Xiang,De-yu Tang,Ling-ling Yan,Luo-lin Deng,Xing-han Wang,Xin-yang Liu,Qing-han Zhou
The challenge of drug resistance in bacteria caused by the over use of biotics is increasing during the therapy process, which has attracted great attentions of the clinicians and scientists around the world. Recently, photodynamic therapy (PDT) triggered by photosensitizer (PS) has become a promising treatment method because of its high efficacy, easy operation, and low side effect. Herein, the poly- l -lysine (PLL) modified metal-organic framework (MOF) nanoparticles, ZIF/PLL-CIP/CUR, were synthesized to allow both reactive oxygen species (ROS) responsive drug release and photodynamic effect for synergistic therapy against drug resistant bacterial infections. The PLL was modified on the shell of the zeolite imidazole framework (ZIF) by the ROS-responsive thioketal linker for controllable CIP release. CUR were encapsulated in ZIF as the photosensitizer for blue light mediated photodynamic effect to produce singlet oxygen ( 1 O 2 ) and superoxide anion radical ( O 2 − ) for efficient inhibition towards methicillin-resistant Staphylococcus aureus ( MRSA ). The charge conversion from negative charge (−4.6 mV) to positive charge (2.6 mV) was observed at pH 7.4 and pH 5.5, and 70.9 % CIP was found released at pH 5.5 in the presence of H 2 O 2 , which suggests the good biosafety at physiological pH and ROS-responsive drug release of the as-prepared nanoparticle in the bacterial microenvironment. The as-prepared nanoparticles could effectively kill MRSA and disrupt bacterial biofilm by combination of chemo- and photodynamic therapy. In mice model, the as-prepared nanoparticles exhibited excellent biosafety and synergistic effect with 98.81 % healing rate in treatment of MRSA infection, which is considered as a promising candidate in combating drug resistant bacterial infection.
研究领域:
纳米技术
·
药学
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生物医学工程
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微生物学
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治疗学
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产品关联
DOI
PubMed
高影响因子
Nutrients
·
2022
·Vol. 14
·期 19
·3928
·
IF 6.706
Guopeng Li,Shugang Li,Huanhuan Liu,Lihua Zhang,Jingzhu Gao,Siteng Zhang,Yue Zou,Xiaodong Xia,Xiaomeng Ren
Plant polysaccharide intervention has shown significant potential to combat obesity. However, studies on animal polysaccharides are indeed rare. The aim of this study was to investigate the potential functions of CIP (IL) on obesity, intestinal microflora dysbiosis, and the possible protection of intestinal barrier in mice fed with high-fat diet (HFD). Our results revealed that after 13 weeks, the HFD+L (high-fat diet + 25 mg/kg CIP) group showed significantly more weight loss and fat accumulation relative to the HFD+H (high-fat diet + 50 mg/kg CIP) group. Furthermore, CIP intervention modulated lipid metabolism and mRNA levels of inflammatory mediators in liver. Overall, CIP clearly improved the intestinal barrier in HFD-fed mice. Additionally, we observed that CIP intervention improved intestinal microbiota community richness and diversity in HFD-fed mice. The CIP intervention mice group showed a relatively lowFirmicutestoBacteroidetesratio compared to the HFD group. This study concluded that CIP could be used as a functional food to prevent adipocyte accumulation, reduce systemic inflammation, and protect the intestinal barrier.Keywords:crude isinglass polysaccharides (CIP);intestinal barrier;inflammation;HO-1/Nrf2 pathway;intestinal flora
研究领域:
营养学
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免疫学
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微生物学
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药理学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Fangfang Duo,Mingliang Zhang,Xiaoting Feng,Chubei Wang,Liangliang Chu,Xi Chen,Jianwei Zhou
Constructing Z-scheme heterojunction has been regarded as a fascinating method to enhance the charge carrier separation rate and retain the high photoredox ability. In this paper, a novel 0D/2D MoS 2 QDs/BiOCl Z-scheme heterojunction with outstanding visible-light photocatalytic performance has been successfully prepared by a facile one-step strategy. The MoS 2 QDs with a diameter of 5 nm were uniformly distributed on the surface of BiOCl nanosheets . The optimized MoS 2 QDs/BiOCl heterojunction showed the most robust CIP and RhB degradation efficiency, which was approximately 32.2 and 44.7 times higher than that of pure BiOCl under visible light irradiation, respectively. This result can be attributed to the synergetic effects of up-conversion and direct Z-scheme heterojunction of the MoS 2 QDs. The optical property , morphology and surface feature of the catalyst were analyzed through the UV–vis DRS, PL , XRD , Raman, FT-IR, XPS, SEM and TEM. The study of ESR characterization and free radical capture experiments confirmed the Z-scheme heterojunction electron transfer route. Finally, a rational photocatalytic mechanism for pollutants degradation over the MoS 2 QDs/BiOCl heterojunctions were proposed. This study may provide a reliable strategy for the construction of Z-scheme bismuth-based heterojunction and its potential application in photocatalytic organic pollutants degradation.
研究领域:
材料科学
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光催化
·
环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Lijun Liu,Qingming Ma,Suning Wang,Yang Gao,Chunrong Zhu,Wenbin Zhao,Wentao Sun,Haifeng Ma,Yong Sun
The treatment for epidermal bacterial infections has become a primary healthy concern, producing a significant therapeutic challenge. Here we present a facile strategy to fabricate lecithin/chitosan nanoparticles (LCNPs) for efficient epidermal drug delivery over epidermal bacterial infections. The central rotatable composite design method was used for the optimization of the preparation, and that the optimal size (212.63 ± 1.95 nm) was obtained via analysis of variance (ANOVA). The prepared CIP-LCNPs show an average diameter of 325.9 ± 7.4 nm and a zeta potential of 26.6 ± 1.2 mV. Antibiotics can be well encapsulated in LCNPs and its release kinetics is studied with cumulative release of 93.81 ± 2.05 % for 48 h. The hemolytic activity, cytotoxicity, and skin irritation are further investigated. The zones of inhibition are 2.16 ± 0.04 cm and 2.92 ± 0.03 cm for Escherichia coli and Staphylococcus aureus , respectively. Moreover, in vitro permeation studies demonstrate that LCNPs can increase the accumulation of antibiotics in the epidermis with retention ratio 2–3 fold higher than commercial formulations. The in vivo result over epidermal-infected wound demonstrates the superior therapeutic effects of LCNPs. The developed LCNPs represent an important advance in fabricating therapeutic materials for enhanced therapy over epidermal bacterial infections.
研究领域:
药剂学
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纳米技术
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微生物学
·
药物递送系统
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DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2024
·Vol. 12
·期 4
·1007-1021
·
IF 6.1
Qixin Zhou,Xiaodan Li,Nan Gao,Guixia Ling,Peng Zhang
Diabetic wounds in a state of high glucose are refractory to treatment and healing, especially if they are infected with bacteria. Herein, a novel nanocomposite (CIP/GOx@ZIF-8) was synthesized by loading ciprofloxacin hydrochloride (CIP) and glucose oxidase (GOx) into zeolitic imidazole framework-8 (ZIF-8) that exhibited good glucose sensitivity and catalytic activity. The high glucose in diabetic wounds could be decomposed into hydrogen peroxide (H2O2) and gluconic acid via the catalysis of GOx, which further destroyed CIP/GOx@ZIF-8 to release Zn2+ and cargos. The combination of glucose starvation, Zn2+, H2O2 and CIP could elevate the antibacterial effect and reduce bacterial resistance. Subsequently, the nanocomposite was fabricated into dissolving microneedles (CIP/GOx@ZIF-8 MNs) using polyvinylpyrrolidone (PVP). The microneedles exhibited good mechanical strength, puncture performance, dissolving performance, glucose responsiveness, antibacterial performance and biocompatibility. For in vivo wound healing, CIP/GOx@ZIF-8 MNs with good biosafety facilitated neovascularization and collagen deposition as well as reduced inflammation, and the wounds were almost healed after treatment. This multimodal therapeutic strategy is created to provide a unique treatment for infected diabetic wounds.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
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药学
·
伤口愈合
✓ 已验证
DOI
PubMed
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Chenhao He,Xiangguo Li,Yang Lv,Aming Xie,Xinping Li,Tao Sun,Gaoyue Wei,Meile Ding,Difei Leng
This study presents a novel cement-based composite exhibiting dual functionality for both absorbing electromagnetic waves and storing thermal energy. The composite was fabricated by incorporating nano-silica–encapsulated phase change microcapsules (n-OD@SiO 2 , MPCM) and a carbonyl iron powder/amorphous carbon composite absorber (CIP@SiO 2 @C). Its workability, hydration kinetics, electromagnetic properties, thermal behavior, mechanical performance, and internal microstructure were systematically characterized using isothermal calorimetry (TAM), a microwave vector network analyzer (VNA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and three-dimensional X-ray microtomography (Micro-CT). The results show that the combined addition of MPCM and CIP@SiO 2 @C markedly enhances both thermal regulation and electromagnetic wave absorption. The composite containing 20 vol% MPCM and 10 wt% CIP@SiO 2 @C achieved optimal electromagnetic performance, with absorption rates exceeding 80 % across nearly the entire 2–18 GHz and surpassing 85 % within 8–18 GHz. This formulation also demonstrated outstanding thermal regulation, reducing the heating rate by 73 % compared with ordinary cement. Although its mechanical strength was slightly lower than that of plain cement, the optimized composite maintained a 28-day compressive strength of 42.6 MPa, indicating satisfactory structural integrity. The findings underscore the success of the proposed cement-based composite in electromagnetic wave attenuation and thermal management, highlighting its strong potential for applications in electromagnetic pollution mitigation and energy-efficient building materials.
研究领域:
材料科学
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建筑工程
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电磁功能材料
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热能存储
·
土木基础设施
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Ying Li,Huaping Xiong,Wei Shi,Zheming Ni,Shengjie Xia
Defect engineering and heterostructure construction are important strategies to enhance the photocatalytic performance of single-phase materials. In this study, an O- and Cd-dual-defect-modified LaOCl@CdS heterojunction (Ov-L@Cdv-C) was successfully constructed. Under visible light irradiation, using the typical fluoroquinolone antibiotic ciprofloxacin (CIP) as the target pollutant, Ov-L@Cdv-C exhibited superior photocatalytic degradation performance compared to Ov-LaOCl and Ov-L@CdS. Under optimal conditions (0.5 g/L catalyst, 0.010 g/L initial CIP concentration, pH = 5), the degradation efficiency of CIP reached 84.79 % within 150 min, significantly higher than that of Ov-LaOCl (48.73 %) and Ov-L@CdS (71.96 %). XPS and EPR characterizations confirmed the presence of abundant O and Cd dual defects in the Ov-L@Cdv-C heterojunction. ESR and free radical quenching experiments revealed that the main reactive species during the degradation process were ·O 2 − and h⁺. Based on work function calculations and built-in electric field analysis, a Z-scheme photocatalytic mechanism for the Ov-L@Cdv-C dual-defect heterojunction was proposed. Furthermore, LC-MS analysis identified the degradation intermediates and proposed three possible degradation pathways. In addition, T.E.S.T. predictions indicated that the toxicity of CIP gradually decreased during the photocatalytic degradation process.
研究领域:
环境科学
·
催化
·
材料科学
·
化学工程
·
光化学
·
分析化学
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毒理学
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Advances
·
2022
·
IF 0
Haixia Xu,Feiyang Zhang,Menglong Wang,He Lv,Deng-Guang Yu,Xinkuan Liu,Hao Shen
Patients with acute and chronic wounds have been increasing around the world, and the demand for wound treatment and care is also increasing. Therefore, a new nanofiber wound dressing should be prepared to promote the wound healing process. In this study, we report the design and preparation of a hierarchical structural film wound dressing. The top layer is composed of profoundly hydrophobic polycaprolactone (PCL), which is used to resist the adhesion of external microorganisms. The bottom layer is made of hydrophilic gelatin, which provides a moist healing environment for the wound. The middle layer is composed of hydrophilic Janus nanofibers prepared with the latest side-by-side electrospinning technique. Gelatin and PCL are used as polymer matrices loaded with the ciprofloxacin (CIP) drug and zinc oxide nanoparticles (n-ZnO), respectively. Test results show that the dressing has outstanding surface wettability , excellent mechanical properties , and rapid drug release. The presence of biologically active ingredients provides antibacterial activity against Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ). Finally, the results of wound healing in mice show accelerated collagen deposition, promotion of angiogenesis, and complete wound healing within 14 days. Overall, this hierarchical structural dressing has a strong potential for accelerating wound healing.
研究领域:
生物材料
·
伤口愈合
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
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