MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 9
·1-9
·
IF 6.408
Yang Fei,Wu Xiaohong,Li Chen,Chen Yuxiao,Liu Shu,Zhang Cuiling,Xian Yuezhong
A new coordination polymer (Ce-Fe-GMP) with excellent catalytic activity was prepared by a facile route, which was further applied to the detection of F − with high sensitivity and selectivity. The simple doping of Fe 3+ into the coordination network can easily modulate the mixing ratio of Ce 3+ and Ce 4+ in the presence of H 2 O 2 , which can extremely improve the catalytic ability of Ce-Fe-GMP. Based on the synergistic effect, the Ce-Fe-GMP with dual-active sites shows better peroxidase activity than that of Ce-GMP. In addition, we found that F − can inhibit the peroxidase activity of Ce-Fe-GMP because of the coordination structure fragmentation and the regulation of Ce 3+ /Ce 4+ ratio. Therefore, different concentrations of F − can be detected by the colorimetric reaction based on this mechanism. The absorption at 652 nm displays a good linear relationship versus the concentration of F − over the range 2.0 to 100.0 μM. Furthermore, F − in real mineral-mixed samples can be measured with satisfactory results. The colorimetric strategy based on the peroxidase activity of Ce-Fe-GMP is simple and low-cost, which shows the potential applications in the field of on-site environment measurement. Graphical abstract
研究领域:
材料科学
·
分析化学
·
环境科学
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Wenjing Li,Mengqing Xu,Zhuoyun Xia,Zheng Wang,Yingying Feng,Hui Li,Chuang Jiang,Yingnan Liu
The highly selective and sensitive detection of paraoxon residues at low environmental concentrations remains challenging. Herein, a novel fluorescent metal-organic framework composite (Ce 4+ @UiO-66-NH 2 ) with excellent phosphatase-like activity was developed to catalyze the hydrolysis of paraoxon into yellow p -nitrophenol ( p -NP), which quenched the composite's blue fluorescence via the inner filter effect. Based on this mechanism, a simple, portable, non-biological colorimetric/fluorescent hydrogel nanosensor (CM-SA spheres) was constructed by incorporating red fluorescent Mn-CDs with aggregation-induced emission as an internal reference. Upon increasing paraoxon concentration, the spheres showed visible color changes from colorless to yellow under daylight and blue to red under UV light. The sensor demonstrated a visual detection sensitivity of 0.05 μg mL −1 and limits of detection of 0.013 μg mL −1 (daylight) and 0.027 μg mL −1 (UV). In real sample analyses of tea and water, the CM-SA spheres exhibited strong anti-interference capability and reliability, offering a practical strategy for paraoxon degradation and detection.
研究领域:
环境监测
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分析化学
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纳米技术
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传感器开发
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食品安全
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DOI
PubMed
高影响因子
DESALINATION
·
2025
·
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.
研究领域:
环境科学
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材料科学
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化学工程
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水处理技术
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催化化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Qian Liu,Miao Li,Jiahao Zhou,Tianxing Ji,Xuna Liu,Zhongquan Zhong,Ping Yang
To address the issues of poor fluidity, significant loss during cycling, and unsuitability for industrial adsorption of lithium ion-sieve powders, the Ce 4+ -doped layered Mn-based lithium ion-sieve precursor (Li 1.37 Ce 0.001 Mn 1.22 O 3 ) was fabricated into spherical particles, by using blend of PVB and PMMA with anti-solvent phase inversion method. The incorporation of PMMA appropriately could increase the porosity and pore size of the spherical particles, while enhancing strength and compression resistance. The porosity of SCLMO was 47.86%, with particle size range of 1.5–2.0 mm. The maximum load capacity was 627.53 N, while the maximum stress was recorded at 233.46 MPa, and the Young’s modulus was 369.70 MPa. The adsorption process of corresponding lithium ion-sieve spherical particles (SCHMO) was characterized by both physical and chemical reactions, adhering to Langmuir adsorption isotherm model and following pseudo-second-order kinetics, with intraparticle diffusion being the dominant mechanism. After 15 adsorption cycles, the adsorption capacity of SCHMO for Li + stabilized at approximately 20 mg/g, with Mn dissolution loss ratio of less than 0.5%. In experiments involving the static adsorption of Li + from actual oil and gas field produced water, the adsorption capacity was recorded at 17.84 mg/g. The lithium ion-sieve spherical particles exhibited significant potential for further industrial applications.
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高影响因子
ADVANCED ENGINEERING MATERIALS
·
2025
·
IF 3.3
Qiaoyun Liu,Yifeng Yu,Yuhang Liu,Liangjie Yuan,Zheng Wang,Baiwen Qi,Aixi Yu
As the most abundant rare earth element, cerium (Ce) can endow implanted bone repair materials with excellent performance. With magnesium phosphate composite material (MPC) as models, Ce is introduced to improve the osteogenic induction of MPC. A series of Ce-doped MPC (CMPC) with Ce molar ratios of 1, 3, and 5% can be successfully synthesized by the precursor method. The obtained results indicate that CMPC has advantages such as reliable biosafety, excellent osteogenic activity, and excellent mechanical properties. When the content of Ce is 1%, the synergistic effect of Ce 4+ and Mg 2+ released from CMPC-1 is more conducive to promoting cell proliferation and enhancing osteogenic activity, which can accelerate the deposition of calcium junctions and promote the repair of bone defects. These results will provide new routes to improve the bioactivity of CMPC, thereby promoting its clinical application research.
研究领域:
生物材料
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生物医学工程
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组织工程
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材料科学
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产品关联
DOI
高影响因子
Food Bioscience
·
2024
·
IF 4.8
Shuze Ren,Songming Li,Mahmoud Abou-Elsoud,Rui Cui,Xing Fu,Xi Huang
Phosvitin phosphopeptides (PPP) have a high ability to chelate mineral ions and promote calcium absorption. In this study, The Fe 3 O 4 nanospheres were first synthesized by hydrothermal method, then the three magnetic nanoparticles (Fe 3 O 4 @PDA@PMAA@PAMAM, Fe 3 O 4 @PDA@Ce 4+ , and Fe 3 O 4 @PDA@TiO 2 ) were obtained by layer modification on their surfaces, respectively. The magnetic nanoparticles were characterized by TEM, XRD, VSM, and Zeta potential. TEM analysis revealed that the nanoparticles were spherical and regular in shape. XRD diffraction analysis showed that the modified nanoparticles have a complete crystal structure. Meanwhile, PAMAM, Ce 4+ , TiO 2 , and other groups have been successfully modified on the nanoparticles. VSM hysteresis regression line results revealed that the magnetic nanoparticles are superparamagnetic. The three kinds of magnetic nanoparticles still maintained excellent enrichment performance after five times of repeated use. Fe 3 O 4 @PDA@TiO 2 has the best enrichment performance (167 mg g −1 ). The N/P ratio of the enriched PPP decreased from 1.36 to 0.98, which also showed that it had excellent PPP enrichment performance. Therefore, the modified magnetic nanoparticles could be an optimal PPP enrichment and purification material.
研究领域:
材料科学
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纳米技术
·
生物化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Qi Zhang,Qian Ma,Xueying Wang,Yi Wang,Dongheng Zhao
In the present work, a series of CeO 2 /WO 2.9 composites with a tunable structure and thickness are originally fabricated by innovating different additional quantities of H 2 WO 4 during the hydrothermal process. Optimal Ce/W-0.25 sensors have a higher response value of 23.68 to 100 ppm n -butanol at room temperature than that of pure CeO 2 (1.26) at 200 ℃. The unique surface double oxygen defect engineering between CeO 2 and WO 2.9 has a remarkable role in enhanced gas sensing, formation of the CeO 2 -WO 2.9 heterojunction, and effective surface/interface transport mechanism. The electron transfer between WO 2.9 and CeO 2 driven by oxygen defects on the surface of CeO 2 can easily facilitate the interconversion between Ce 3+ and Ce 4+ . This work provides a new insight and the facile fabrication pathway for constructing double oxygen defects-derived CeO 2 -based heterostructures for developing novel n -butanol gas sensors with excellent sensing performance at room temperature.
研究领域:
材料科学
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化学工程
·
纳米技术
·
传感器与执行器
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Xiaolei Hu,Junxiao Chen,Weiye Qu,Rui Liu,Dongrun Xu,Zhen Ma,Xingfu Tang
Although ceria-based catalysts serve as an appealing alternative to traditional V2O5-based catalysts for selective catalytic reduction (SCR) of NOx with NH3, the inevitable deactivation caused by SO2 at low temperatures severely hampers the ceria-based catalysts to efficiently control NOx emissions from SO2-containing stack gases. Here, we rationally design a strong sulfur-resistant ceria-based catalyst by tuning the electronic structures of ceria highly dispersed on acidic MoO3 surfaces. By using Ce L3-edge X-ray absorption near edge structure spectra in conjunction with various surface and bulk structural characterizations, we report that the sulfur resistance of the catalysts is closely associated with the electronic states of ceria, particularly expressed by the Ce3+/Ce4+ ratio related to the size of the ceria particles. As the Ce3+/Ce4+ ratio increases up to or over 50%, corresponding to CeO2/MoO3(x %, x ≤ 2.1) with the particle size of approximately 4 nm or less, the non-bulk electronic states of ceria appear, where the catalysts start to show strong sulfur resistance. This work could provide a new strategy for designing sulfur-resistant ceria-based SCR catalysts for controlling NOx emissions at low temperatures.
研究领域:
环境催化
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材料化学
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大气污染控制
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表面科学
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无机功能材料
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Yanfei Wang,Weiran Zhang,Jinping Du,Duan Li,Rongjun Liu
It is urgent to develop thermal barrier coating (TBC) topcoat materials with ultra-low thermal conductivities for next-generation gas turbine engines. A novel pyrochlore-based single-phased ceramic, tuned by codoping of lanthanum zirconate, (La 1-x Y x ) 2 (Zr 1-y Ce y ) 2 O 7 , has been synthesized from the solid state reaction method. The thermal conductivity of (La 1-x Y x ) 2 (Zr 1-y Ce y ) 2 O 7 not only exhibits a temperature-independent trend but also reaches as low as 0.93 W·m −1 ·K −1 , a value that is lowest of fully dense crystalline solids in open literature, attributing to the following two combined effects. The first is the strong scattering of phonons by small-sized Y 3+ cations occupying the oversized atomic cages formed by the distinctive pyrochlore structure. The second is the lattice softening effects arising from larger-sized Ce 4+ substituting Zr 4+ cations. The above two effects act in concert and thus form a glasslike and ultra-low thermal conductivity of (La 1-x Y x ) 2 (Zr 1-y Ce y ) 2 O 7 solid solutions, which is ideal for next-generation TBC topcoat applications.
研究领域:
材料科学
·
工程热物理
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DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yaxin Li,Shiwen Wu,Hongzhi Lu,Shoufang Xu
Organicphosphorus is a ubiquitous pesticide that has potential hazards to human health and environmental well-being. Therefore, the precise identification of residues of organophosphorus pesticides (OPs) emerges as an urgent necessity. A ratiometric fluorescent sensor for the detection of OPs by leveraging the catalytic activities of Ce 3+ and Ce 4+ on the two fluorescent substrates 4-Methylumbelliferyl phosphate (4-MUP) and o -phenylenediamine (OPD) correspondingly was designed. Ce 3+ can not only dephosphorylate 4-MUP to generate 4-methylumbelliferone (4-MU) with blue fluorescence, but it can also react with H₂O₂ to produce Ce 4+ and hydroxyl radicals (·OH), both of which exhibit peroxidase-like activity. These two species can oxidize the colorless substrate OPD into the yellow fluorescent product 2,3-diaminophenazine (DAP). Owing to the inner filter effect, the produced DAP diminishes the blue luminescence of 4-MU. So, with the increase of H 2 O 2 concentration, the blue fluorescence of 4-MU decreased while the yellow fluorescence of DAP increased. A ratiometric fluorescent sensor based on Ce 3+ -4-MUP-OPD triple system was established for H 2 O 2 detection with the fluorescence color of the solution changes from blue to yellow. OPs inhibit the activity of acetylcholinesterase (AChE) and prevent AChE and choline oxidase (ChOx) from acetylthiocholine chloride (ATChCl) to produce H 2 O 2 , thereby OPs can diminish DAP generation and reinstating the blue luminescence of 4-MU. The detection limits of H₂O₂ and OPs using fluorescence spectroscopy are 0.03 μM and 0.59 ng/mL, respectively. However, when coupled with a smartphone color recognition application, the visual detection limits for H₂O₂ and OPs are 9.7 μM and 19.6 ng/mL, respectively. The materials used in this ratiometric sensor are cost-effective and readily available, eliminating the need for material synthesis and simplifying the detection process. Additionally, the sensor integrates with a smartphone color recognition application, further streamlining the detection workflow and enabling real-time data analysis and result feedback. This combination provides a straightforward, efficient and economical solution for monitoring OPs in agricultural products.
研究领域:
分析化学
·
环境科学
·
食品科学
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产品关联
DOI
PubMed
高影响因子
TALANTA
·
2024
·
IF 5.6
Gaoya Hu,Daoping Yue,Weishuan Chen,Qingqing Lin,Haixia Lyu
Heparin is a highly negatively charged sulfated linear polymer glycosaminoglycan that has been widely used as an anticoagulant in medicine. Protamine is a cationic protein rich in arginine that is used to treat the blood-brain barrier during excess heparin surgery. Trypsin is the most important digestive enzyme-encoding generated by the pancreas and can specifically cleave the carboxyl ends of arginine and lysine residues. Heparin, protamine, and trypsin interact and constrain each other, and their fluctuations reflect the body's dysfunction. Therefore, it is necessary to develop a fast, sensitive, and highly selective assay for regularly monitoring the levels of heparin, protamine, and trypsin in serum. Herein, a fluorescent and colorimetric dual-mode upconversion nanoparticle (UCNP) biosensor was used for the determination of heparin, protamine, and trypsin based on the oxidase-mimicking activity of Ce 4+ and electrostatic control. The biosensor exhibited sensitive detection of heparin, protamine, and trypsin with low limits of detection (LODs) of 16 ng/mL, 87 ng/mL and 31 ng/mL, respectively. Furthermore, the designed biosensor could eliminate autofluorescence, which not only effectively increased the accuracy of the sensor but also provided a new sensing pathway for the detection of differently charged biotargets.
研究领域:
生物传感器
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纳米技术
·
分析化学
·
生物医学工程
·
临床诊断
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产品关联
DOI
PubMed
高影响因子
LUMINESCENCE
·
2024
·Vol. 39
·期 10
·e4912
·
IF 3.2
Congcong Hu,Wenjuan Wang,Qianwen Li,Bin Liu,Fubing Xiao,Jinquan Liu,Shengyuan Yang
Hence, N,S-CDs with photoluminescent property were simply synthesized via a one-step hydrothermal method. Combined with the commercial reagent Ce 4+ , a ratiometric fluorescence assay for ascorbic acid (AA) detection was established. Ce 4+ , possessing oxidization, could directly oxidize o-phenylenediamine (OPD) to form the yellow fluorescent product oxOPD. Under the excitation wavelength of 370 nm, oxOPD had a maximum fluorescence emission at 562 nm. Meanwhile, due to the occurrence of the inner filter effect (IFE), oxOPD quenched the fluorescence of N,S-CDs. However, ascorbic acid (AA) inhibited the oxidation of Ce 4+ , causing the fluorescence of oxOPD at 562 nm to decrease, accompanied by an increase in the fluorescence belonging to N,S-CDs at 450 nm. Thus, a Ce 4+ -assisted ratiometric fluorescence method was established for AA detection. The two fluorescence output signals in this method had opposite changing trends, which could reduce system errors and improve the accuracy. This method was successfully applied to the determination of AA in drugs and fruits.
研究领域:
分析化学
·
生物医学
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产品关联
DOI
PubMed
高影响因子
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