ChemistrySelect
·
2025
·Vol. 10
·期 3
·e202402822
·
IF 2
Linbo Chen,Yingying Zhu,Di Wang,Jinyuan Zhu,Yumeng Ren,Geng Chen
Graphical A novel Co─FCN heterojunction photocatalyst was synthesized by introducing Co 3 O 4 and fluorine into graphitic carbon nitride (CN) using a simple one-pot pyrolysis method. The photocatalytic activity was assessed through the photodegradation of Rhodamine B (RhB). The resulting Co─FCN photocatalyst demonstrated superior photocatalytic performance and stability compared to pure CN. Photocatalysis is an effective solution to degrade organic dye discharge in wastewater treatment due to its efficiency, environmental friendliness and cost-effectiveness. However, issues such as limited visible light absorption and rapid charge carrier recombination hinder its practical use. In this research, the heterojunction (Co─FCN) composed of carbon fluoride nitride and cobalt tetroxide (Co 3 O 4 ) was successfully prepared by a simple one-pot pyrolysis method. The obtained nanocomposites showed their efficiency as photocatalyst in the photodecomposition of Rhodamine B (RhB). The relationship between microstructure and properties of photocatalyst was studied in detail by means of characterization techniques. The results showed that the RhB degradation efficiency of Co 3 ─FCN was 92.91% within 60 min irradiation time. The results of free radical scavenging experiments show that superoxide anion (·O 2− ) and hydroxyl radical (·OH) are the main active species in Co─FCN composite catalysts. In addition, the potential degradation pathway of RhB was inferred based on the intermediates detected by liquid chromatography mass spectrometry (LC-MS), and the preliminary photocatalytic reaction mechanism of Co─FCN heterogeneous catalyst was constructed accordingly. Therefore, this research provides new insights into the preparation and modification of CN photocatalysts, thereby promoting the application potential of efficient photocatalysts in the degradation of organic pollutants.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 23
·5545
·
IF 4.2
Hui Liang,Ruijuan Li,Tongjin Liu,Rumei Li,Yuxiao Zhu,Feng Fang
Peroxymonosulfate (PMS)-based advanced oxidation processes have shown potential for the removal of organic contaminants; however, the preparation of catalysts with high degradation efficiencies and rapid reaction rates remains a challenge. In this study, we have successfully synthesized CoFe bimetallic modified corn cob-derived biochar (CoFe/BC) for the activation of PMS, achieving the rapid and efficient degradation of bisphenol F (BPF). The synthesized CoFe/BC catalyst demonstrated excellent catalytic performance, achieving over 99% removal within 3 min and exhibiting a removal rate of 90.0% after five cycles. This could be attributed to the cyclic transformation of Co and Fe, which sustained rapid PMS activation for BPF degradation, and Co0/Fe0played a significant role in the cyclic transformation. Furthermore, the electron paramagnetic resonance tests confirmed that •SO4−and •OH were the primary reactive oxygen species, while •O2−played a minor role in BPF degradation. This study highlights the high degradation efficiency, rapid reaction rate, excellent magnetic separation properties, and exceptional reusability of CoFe/BC catalysts for BPF removal, providing valuable insights for practical wastewater treatment.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Haiyang Liu,Xuejuan Wan,Tianqi Liu,Yuanqing Li,Youwei Yao
Cascade recognition of trivalent chromium cation (Cr 3+ ) and fluoride anion (F − ) via rhodamine-urea methacrylate-based fluorescent probe (RhBUA) and its subsequent cationic complex was reported. The non-fluorescent rhodamine derivatives can selectively detect Cr 3+ cation over some other metal ions in CH 3 CN–H 2 O (90/10, v/v, pH 7.0) solutions with a 1:1 stoichiometry, leading to prominent fluorescence OFF–ON switching. The obtained RhBUA–Cr 3+ complex can subsequently serve as a sensitive and selective chemosensor for F − ion. Complete signal quenching (fluorescence ON–OFF switching) can also be observed, ascribing to the extraction of Cr 3+ cation and the resulting deformation of RhBUA–Cr 3+ complex.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
AQUATIC TOXICOLOGY
·
2025
·
IF 4.3
Hongbo Yang,Chan Xu,Jieyu Song,Jin Li,Chan Zhang,Chunli Teng,Kai Ma,Feng Xie
Perfluorooctane sulfonic acid (PFOS) and its alternative 6:2 chlorinated polyfluoroethersulfonate (6:2 Cl-PFESA, also known as F-53B), are frequently detected in a variety of environmental and human samples. These substances have been associated with hepatotoxic effects, including disorders in lipid metabolism and oxidative stress. However, the molecular mechanisms underlying the causal relationship between exposure to F-53B and hepatotoxicity remain inadequately understood. This study investigated the toxicokinetics and mechanisms of hepatotoxicity associated with prolonged exposure to F-53B in adult Chinese rare minnows. Specifically, 5-month-old adult Chinese rare minnow was exposed to concentrations of 10 μg/L and 200 μg/L of F-53B for a duration of 28 days for bioaccumulation assessment, followed by a 14-day period for metabolic evaluation. The findings indicated that the bioaccumulation of F-53B in the tissues was positively correlated with the exposure concentrations. The logarithmic bioconcentration factor (Log BCF28d) was determined to be 2.67 ± 0.02 for the low concentration group and 2.27 ± 0.01 for the high concentration group. The calculated half-lives (t 1/2 ) were 18.50 ± 1.67 days and 21.38 ± 0.31 days for the respective concentration groups. F-53B protein exhibited a distinct tissue-specific distribution in adult Chinese rare minnow, with the following order of enrichment: Blood > Liver > Gonad > Gill > Intestine > Brain > Muscle. F-53B was primarily concentrated in the blood and liver, where the protein content was significantly higher. Exposure to F-53B for 28 days significantly elevated biochemical levels associated with lipid metabolism and increased the activities of the enzymes FAS, PPARα, and ACC in the liver. This exposure also resulted in impairment of the hepatic oxidative system in the Chinese rare minnow, with F-53B significantly reducing most of the measured markers related to oxidative stress (e.g., GSH, SOD, CAT, and MDA). Proteomic analysis indicated that the toxicity of F-53B regulates the expression of proteins across several functional classes. Based on the functional information of the differential proteins provided in UniProt and KEGG, they were categorized into five main categories: Cellular Processes, Environmental Information Processing, Genetic Information Processing, Metabolism, and Organismal Systems. This study indicate that F-53B is bioaccumulative and persistent in Chinese rare minnow, and can further induce oxidative stress and lipid metabolism disorders. Combined with proteomic research methods, the toxicological effects of F-53B on Chinese rare minnow can be better explained.
研究领域:
生态毒理学
·
蛋白质组学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Han Zhang,Yinyin Zhang,Luxiang Zhu,Yanan Liu
The frequent detection of 6:2 chlorinated polyfluorinated ether sulfonate (F-53B) in various environments has raised concerns owing to its comparable or even higher environmental persistence and toxicity than perfluorooctane sulfonate (PFOS). This study investigated the plasma degradation of F-53B for the first time using a water film plasma discharge system. The results revealed that F-53B demonstrated a higher rate constant but similar defluorination compared to PFOS, which could be ascribed to the introduction of the chlorine atom . Successful elimination (94.8–100 %) was attained at F-53B initial concentrations between 0.5 and 10 mg/L, with energy yields varying from 15.1 to 84.5 mg/kWh. The mechanistic exploration suggested that the decomposition of F-53B mainly occurred at the gas-liquid interface, where it directly reacted with reactive species generated by gas discharge . F-53B degradation pathways involving dechlorination , desulfonation , carboxylation , C-O bond cleavage , and stepwise CF 2 elimination were proposed based on the identified byproducts and theoretical calculations. Furthermore, the demonstrated effectiveness in removing F-53B in various coexisting ions and water matrices highlighted the robust anti-interference ability of the treatment process. These findings provide mechanistic insights into the plasma degradation of F-53B, showcasing the potential of plasma processes for eliminating PFAS alternatives in water.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Kang Du,Changzhi Yin,Wei Zhu,Cai Zhou,Bohan Zhang,Tingting Wang,Shengxiang Wang,Wen Lei
The phase compositions and microwave dielectric properties of Sn-deficient Ca 2 Sn 2 Al 2 O 9 ceramics in this study were explored. The CaSnO 3 and SnO 2 second phases existed at Ca 2 Sn 2- x Al 2 O 9-2 x ( x = 0) ceramic. Single-phase Ca 2 Sn 2 Al 2 O 9 ceramics were obtained at 0.08 ≤ x ≤ 0.1, and the orthorhombic structure with the Pbcn space group of Ca 2 Sn 2 Al 2 O 9 was verified. For multi-phase Ca 2 Sn 2- x Al 2 O 9-2 x (0 ≤ x ≤ 0.06) ceramics, their microwave dielectric properties were mainly affected by second phase contents, and their Q × f values increased gradually with the rise in x . High Q × f (105,700 GHz at 12.99 GHz) was obtained by the Ca 2 Sn 2- x Al 2 O 9-2 x ( x = 0.08) ceramic with high intrinsic Q × f (175,000 GHz). The large deviation between measured Q × f values and fitted intrinsic Q × f values could be ascribed to the Sn 4+ vacancies of the Sn-deficient Ca 2 Sn 2 Al 2 O 9 ceramics. The Ca 2 Sn 2- x Al 2 O 9-2 x (0 ≤ x ≤ 0.1) ceramics presented large negative τ f values, and this τ f was mainly affected by τ ε . Meanwhile, the Ca 2 Sn 2- x Al 2 O 9-2 x ( x = 0.08) ceramic achieved optimal microwave dielectric properties ( ε r = 8.3, Q × f = 105,700 GHz at 12.99 GHz and τ f = −63.7 ppm/°C), indicating the good feature of this material for millimetre-wave applications.
研究领域:
材料科学
·
电子材料
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Shuai Li,Chen Li,Minmin Mao,Kaixin Song,Yaseen Iqbal,Amir Khesro,Sinan S. Faouri,Zhilun Lu,Bing Liu,Shikuan Sun,Dawei Wang
In this work, Zn-Ni co-modified LiMg 0.9 Zn 0.1- x Ni x PO 4 ( x = 0–0.1) microwave dielectric ceramics were fabricated using a solid state synthesis route. Rietveld refinement of the XRD data revealed that all ceramic samples have formed a single phase with olivine structure. SEM images showed that the samples have a dense microstructure, that agrees with the measured relative density of 97.73 %. Based on the complex chemical bond theory, Raman and infrared reflectance spectra, we postulate that ε r is mainly affected by the ionic polarizability, lattice and bond energy, while P-O bond plays a decisive role in Q×f and τ f value. Optimum properties of Q×f ~ 153,500 GHz, ε r ~ 7.13 and τ f ~ −59 ppm/°C were achieved for the composition LiMg 0.9 Zn 0.06 Ni 0.04 PO 4 sintered at 875 ℃ for 2 h. This set of properties makes these ceramics an excellent candidate for LTCC , wave-guide filters and antennas for 5 G/6 G communication applications.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yaoyao Zhu,Yeqiang Lu,Hang Yu,Guojun Jiang,Xueting Zhao,Congjie Gao,Lixin Xue
Super-hydrophobic F-TiO 2 @PP membranes were developed from polypropylene (PP) non-woven fabric by in situ cross-linking polymerization of trifluorofluorooctyl methacrylate (FOMA) and sol–gel-derived titanium dioxide with vinyltriethoxysilane (VTES). Due to the formation of super-hydrophobic “coral”-like synapses on the filamentous surfaces of PP non-woven fabric, F-TiO 2 @PP membranes showed extremely high water contact angles up to 157° and capability of rapidly absorbing oil drops. The F-TiO 2 @PP membranes were also able to expel water from water-in-oil emulsions with robustly high oil permeate fluxes (up to 11,000 L m −2 h −1 under gravity), water removing efficiency (up to 99.7%), re-usability and long-term stability even at the presence of surfactant and salts. Such superior performance could lead to potential applications in rapid collection and efficient purification of recovered oily organic components from waste liquids or accidental oil discharges in marine or continental situations.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Shengming Liu,Yun Zhang,Shihua Ding,Tianxiu Song
V cation was introduced at Nb-site in CoTiNb 2 O 8 for the purpose of tuning the defects concentration. XRD analysis indicated that no secondary phase developed over the whole composition range. The sintering temperature decreased to 1150 °C in current work, compared with pure CoTiNb 2 O 8 ceramic (∼1250 °C). V-introduction inhibited grain growth and benefited grain homogenization. The decreased molecular dielectric polarizability and blue shift of Raman A 1g mode both made lower ε r from 59.2 to 41.8. Based on the X-ray photoelectron spectroscopy (XPS), V doping decreased the oxygen vacancy concentration and tuned the Co valence state. The defects compensation by oxygen and Co vacancies significantly improved Q × f up to 38,012 GHz, accompanied with a 50% rise. The slight increase in τ f was attributed to the Nb-O bond energy reduction. The CoTi(Nb 0.97 V 0.03 ) 2 O 8 had a high ε r of 54.6 with good Q × f of about 38,012 GHz and τ f =96.47 ppm/°C. Enhanced Q × f and low sintering temperature were achieved simultaneously.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Jiangli Feng,Chenhui Wang,Hailin Lei,Songtao Liu,Jing Liu,You Han,Jinli Zhang,Wei Li
Lithium cobalt oxide (LiCoO 2 ) is proverbially employed as cathode materials of lithium-ion batteries attributed to the high theoretical capacity, and currently, it is developing towards higher cut-off voltages in the pursuit of higher energy density. However, it suffers from serious structural degradation and surface side reactions, in particular, at the voltage above 4.60 V, leading to rapid decay of the battery life. Taking into account the desirable oxygen buffering property and the fast ion mobility characteristic of cerium oxide fluoride, in this work, we prepared Ce & F co-modified LiCoO 2 by using the precursors of Ce(NO 3 ) 3 ·6H 2 O and NH 4 F, and evaluated the electrochemical performance under voltages exceeding 4.60 V. The results indicated that the modified samples have multiphase heterostructure of surface CeO 2− x and unique Ce O F solid solution phase. At 3.0–4.60 V and 25 °C, the preferred sample LCO-0.5Ce-0.3F has a high initial discharge specific capacity of 221.9 mA h g −1 at 0.1 C, with the retention of 80.3% and 89.6% after 300 cycles at 1 and 5 C, comparing with the pristine LCO (56.4% and 22.6%). And at 3.0–4.65 V, its retention is 64.0% after 300 cycles at 1 C, versus 8.5% of the pristine LCO. Through structural characterizations and DFT calculations, it suggests that Ce 4+ & F − co-doping suppresses the H3 to H1/3 irreversible phase transition, stabilizes the lattice structure, and reduces the redox activity of the lattice oxygen by modulating the Co 3 d –O 2 p energy band, consequently improving the electrochemical performance of LiCoO 2 at high voltages.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF NATURAL PRODUCTS
·
2024
·
IF 3.3
Weihong Wang,Jiaxu Shang,Shupeng Yin,Kunyu Xia,Rui Ma,Weiming Zhu,Peng Fu
Metabolites with high chemical reactivity serve important roles in chemical defenses of organisms. Formaldehyde, as a simple and highly reactive small molecule, can be produced by microorganisms, plants, and animals. Its toxicity is well known, but information about its other biological functions remains scarce. Here, we report that the natural product SEK34b produced by Streptomyces species can react nonenzymatically with formaldehyde in water to yield the methylene-bridged dimer phaeochromycin F. This process can eliminate the toxic substance formaldehyde produced by Staphylococcus aureus. Furthermore, there is a substantial inhibitory impact of phaeochromycin F on S. aureus. We hypothesize that these constitute an integrated system of defense and attack of Streptomyces species against competitors. Our study indicates that formaldehyde can react with vancomycin and tigecycline under mild conditions to generate the derivatives bearing an imidazolidin-4-one moiety, thereby reducing the antibacterial activity of these antibiotics. These data provide a possible chemical interaction mechanism of bacteria involving the nonenzymatic reactions of formaldehyde with highly reactive natural products.
研究领域:
微生物学
·
生物化学
·
药理学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Weirui Chen,Weijie Chen,Yimin Luo,Yanqi Feng,Xukai Li,Jing Wang,Ping Li,Liying Bin,Bing Tang,Laisheng Li
g-C 3 N 4 (CN) based catalysts were effective for photocatalytic ozonation (PCO), but their stability during reaction remained a mystery. This study investigated the change on PCO activity and stability of CN induced by F or I doping. Compared with CN, F-CN had the greater VB potential while I-CN had a greater CB position, which both led to their better O 3 activation. F-CN and I-CN PCO showed the greater oxalic acid (OA) degradation than that of CN PCO process. Though the enhanced activity, both F-CN and I-CN demonstrated the lower stability compared with that of CN. Because of the existing of reactive oxygen species (ROS) like •OH, •O 2 - and h vb + , CN, F-CN and I-CN were partially oxidized, generating NO 3 - and organic molecules such as cyanuric acid. h vb + and •OH mainly accounted for the decomposition of three CN. Triazine ring oxidation resulted in internal tearing and edge fracture as well as the formation of O-containing groups on all CN-based catalysts. O contents in catalysts initially increased and then decreased with reaction time, indicating that surface O-containing groups were unstable. The structural destroy could be eased with the present of organic pollutants. This study deepened the understanding of fate of CN based catalysts during PCO application.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）