APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xuan Xuan,Shuang Meng,Guozhe Sui,Ning Liu,Dongxuan Guo,Dantong Zhang,Xue Yang,Yue Li,Jinlong Li
The rational design of solid-solution-oxide heterostructure presents a promising pathway to synergize band structure engineering and interfacial charge dynamics in advanced photocatalysis. Herein, a novel S-scheme CeZnO/ZnO heterojunction was fabricated through solid-solution lattice engineering, where Ce-O-Zn covalent bonding networks are strategically constructed at phase boundaries via controlled exceedance of the Ce solubility limit in ZnO matrix. Coupled with Ag nanoparticle-induced localized surface plasmon resonance (LSPR), this hierarchical system achieves remarkable visible-light-driven tetracycline (TC) degradation (90.4 % within 60 min). The outstanding degradation performance can be attributed to the formation of a built-in electric field at the Ce-O-Zn interface, the presence of oxygen vacancies, and the synergistic catalytic effect of Ag nanoparticles. Density functional theory (DFT) calculations and experimental characterizations further reveal that the CeZnO/ZnO heterojunction facilitates S-scheme charge transfer via Ce-O-Zn bonds, improving charge transfer and separation efficiency while preserving the strong redox capability of photo-generated charge carriers. This study provides valuable insights into the design of high-performance heterojunction photocatalysts and carries significant implications for the development of photocatalysis.
研究领域:
材料科学
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物理化学
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环境催化
·
纳米材料
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光催化
·
表面科学
·
半导体异质结
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产品关联
DOI
高影响因子
ENERGY
·
2024
·
IF 9
Tao Tan,Yushu Chen,Yongyue Wang,Zuhao Li,Zhige Zhang,Jun Xie,Yong Chen
The use of green biogas as a raw material for producing methanol-friendly syngas (H 2 /CO ≈ 2) for one-step methanol synthesis has gained significant attention. However, developing efficient catalysts with high activity and stability remains challenging, as they often face issues with stability and carbon deposition. This study presents a Ni/CeO 2 /HT catalyst designed for high activity and long-term stability by leveraging the Ce redox cycle and strong interactions between Ni-CeO 2 and hydrotalcite (HT). The catalyst benefits from abundant oxygen vacancies generated by the Ce 3+ - Ce 4+ pathway, enhancing its ability to activate CO 2 and H 2 O and providing excellent coke resistance. Comprehensive analyses of CO 2 /H 2 O adsorption and carbon elimination mechanisms were conducted using techniques such as in situ H 2 -TPR, CO 2 /H 2 O-TPSR, in situ CH 4 -TPSR, CO 2 /H 2 O-TPO, and FTIR. The Ni/CeO 2 /HT catalyst outperformed others in CO 2 /H 2 O adsorption and CH 4 activation capacity, promoting the generation of active oxygen species and effectively removing coke precursors, thereby improving resistance to Ni sintering and carbon deposition. At 750 °C and a weight hourly space velocity (WHSV) of 32,400 mLg Cat −1 h −1 , it achieved CH 4 and CO 2 conversions of 93 % and 66 %, respectively, with long-term stability exceeding 200 h.
研究领域:
催化化学
·
可再生能源
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2022
·
IF 6.556
He Mei,Qing Wang,Jiahui Jiang,Xiaolei Zhu,Huili Wang,Shugen Qu,Xuedong Wang
Herein, glutathione-capped copper nanoclusters (CuNCs) and graphitic carbon nitride nanosheets (g-C 3 N 4 NSs) were synthesized by a facile one-pot chemical reduction and directly thermal pyrolysis following ultrasonic exfoliation approaches, respectively. The introduction of Ce(III) (Ce 3+ ) played dual functions in constructing a fluorescence-enhanced ratiometric nanoprobe (g-C 3 N 4 NSs-Ce 3+ -CuNCs), i.e., triggering aggregation-induced emission of CuNCs and conjugating g-C 3 N 4 NSs with CuNCs by virtue of electrostatic and coordination interactions. The as-fabricated nanohybrid displayed 460 and 625 nm dual-emitting peaks, attributing to the emission of g-C 3 N 4 NSs and CuNCs, respectively. Upon addition of H 2 O 2 , the 625 nm emission was dramatically quenched, whereas the 460 nm emission remained nearly unchanged, thereby causing obvious color changes from purple to blue under a 365-nm UV lamp. A ratiometric fluorescent assay, based on g-C 3 N 4 NSs-Ce 3+ -CuNCs, was devised for sensitive and visual detection of H 2 O 2 , which spanned the linear range of 2–100 μM with a detection limit of 0.6 μM. In the presence of glucose oxidase , the ratiometric nanoprobe could be simultaneously employed to detect glucose across the linear range of 1.6–320 μM with a detection limit of 0.48 μM. In milk and human serum samples, the fortified recoveries for H 2 O 2 and glucose by the nanoprobe were in the range of 95.5–103.6% with RSDs <3.8%. The real detection levels for glucose are consistent with those by a standard glucometer. As such, the ratiometric nanoprobe offers a promising methodology for several practical applications, such as point-of-care diagnosis and workplace health evaluations.
研究领域:
分析化学
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生物医学工程
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纳米技术
✓ 已验证
DOI
高影响因子
Chemistry of Heterocyclic Compounds
·
2021
·Vol. 57
·期 7
·806-816
·
IF 1.277
An Xiaoying,Gao Lei,Wang Mingliang,Wu Haitao,Wang Lanzhi
Novel, efficient and environmentally friendly approaches have been developed for the synthesis of 1,5-benzodiazepine-2,3-dicarboxylates by one-pot three-component domino reactions in the presence of a catalytic amount of γ-Fe 2 O 3 @SiO 2 /Ce(OTf) 3 in EtOH at ambient temperature. A total of 32 2,5-dihydro-1 H -1,5-benzodiazepine-2,3-dicarboxylates and 2-methyl-2,3-dihydro-1 H -1,5-benzodiazepine-2,3-dicarboxylates with enamine or imine structure of the heterocycle, respectively, were obtained in good yields by reacting substituted 1,2-phenylenediamine, β-carbonyl esters, and ethyl glyoxylate or ethyl pyruvate. One-pot reactions were successfully realized to form one new cycle and four new bonds (one C–C, two C–N, one C=C or two C–C, one C–N, one C=N). Furthermore, plausible mechanisms for the formation of 1,5-benzodiazepine-2,3-dicarboxylates have been proposed. The salient features of this reaction include short reaction time, mild reaction conditions, moderate to excellent yields, recyclability of the catalyst, and wide substrate scope.
研究领域:
有机化学
·
合成化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Baihe Sun,Guanghui Li,Yue Wu,Junwei Gai,Min Zhu,Weiwei Ji,Xiaoying Wang,Fenghua Zhang,Wanting Li,Jingjin Hu,Yuxin Lou,Gusheng Feng,Xijun Han,Jinwen Dong,Jiayuan Peng,Jiawei Pei,Yakun Wan,Yanfei Li,Linlin Ma
Apolipoprotein A1 (Apo-A1) is a well-recognized biomarker in tissues, closely associated with cardiovascular diseases such as atherosclerosis, coronary artery disease, and heart failure. However, existing methods for Apo-A1 determination are limited by costly equipment and intricate operational procedures. Given the distinct advantages of electrochemical immunosensors, including affordability and high sensitivity, along with the unique attributes of nanobodies (Nbs), such as enhanced specificity and better tissue permeability, we developed an electrochemical immunosensor for Apo-A1 detection utilizing Nb technology. In our study, Ce-MOF@AuNPs nanocomposites were synthesized by using ultrasonic methods and applied to modify a glassy carbon electrode. The Nb6, screened from an Apo-A1 immunized phage library, was immobilized onto the nanocomposite material, establishing a robust binding interaction with Apo-A1. The recorded peak current values demonstrated a logarithmic increase corresponding to Apo-A1 concentrations ranging from 1 to 100,000 pg/mL, with a detection limit of 36 fg/mL. Additionally, the developed immunosensors demonstrated high selectivity, good stability, and reproducibility. Our methodology was also effectively utilized for serum sample analysis, showing good performance in clinical assessments. This electrochemical immunosensor represents a promising tool for Apo-A1 detection, with significant potential for advancing cardiovascular disease diagnostics.
研究领域:
生物医学工程
·
分析化学
·
纳米技术
·
心脏病学
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免疫学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Songyun Tao,Xiao Wang,Cheng Rao,Kaijie Liu,Yannan Li,Zhaoxu Yuan,Guan Peng,Yang Lou,Jun Ye,Hai Liu,Zeshu Zhang,Xiangguang Yang,Yibo Zhang,Shuyan Song
Enhancing catalytic performance through precise control of active site interactions still poses significant challenges. Diverging from conventional static methods, this study pioneers an innovative current-assisted approach to achieve precise, in situ dynamic tuning of electron transfer specifically within Pd-Ce diatomic sites. The groundbreaking current-assisted Pd 1 -Ce 1 /ATO catalyst achieves unprecedentedly low-temperature methane combustion performance, with a remarkable T 50 of 181 °C and a record-high turnover frequency (TOF 260 °C ) of 4.25 × 10 −2 s −1 . The current-induced augmentation of electron transfer from Ce to Pd markedly elevates the electron density around Pd centers , orchestrating dynamic modulation to synergistically enhance catalysis. This modulation amplifies the electron backdonation from electron-rich Pd to the methane C─H bond, facilitating efficient C─H bond scission, while promoting lattice oxygen mobility near Pd 1 -Ce 1 sites by tuning orbital energy matching, thus significantly amplifying the catalyst's oxidation capacity. The synergistic interplay of these electronically tuned factors promotes the formation of a four-center transition state (H 3 C δ − -Pd-O-H δ + ), effectively weakening the C─H bond and dramatically accelerating methane catalytic oxidation. This work not only achieves ultra-low-temperature catalytic activity with minimal noble metal loading but also establishes a paradigm shift in the rational design of advanced combustion catalysts, enabling on-demand modulation of catalytic activity through real-time regulation of inter-site interactions .
研究领域:
催化化学
·
材料化学
·
环境化学
·
能量转换
·
纳米催化剂
✓ 已验证
DOI
高影响因子
Materials Today
·
2025
·
IF 22
Hang Yue,Sichen Huo,Xinyu Wang,Mingyi Wang,Heyuan Sun,Yanjie Chen,Ying Dai,Mingyang Liu,Jinlong Zou
Due to restrictive linear relationship between intermediates in adsorption evolution mechanism (AEM) of oxygen evolution reaction (OER), a higher overpotential must be overcome for conversion of *O to *OOH. Activating lattice oxygen mechanism (LOM) can address the AEM’s challenges by facilitating O-O coupling. However, via LOM pathway, extracting electrons from metal-oxygen (M−O) bonds usually results in structural instability. Herein, we propose an effective method to stabilize LOM-catalysts by combining cerium dioxide with cobalt phosphide (CeO 2 /CoP heterostructure). CeO 2 acts as an electron buffer to retain/provide electrons at different stages, while CoP with strong Co-P covalency enhances structural/catalytic stability in strongly-alkaline conditions. CeO 2 /CoP exhibits an OER overpotential of only 225 mV at 10 mA cm −2 . Initially, CeO 2 acquires electrons from CoP to accelerate surface reconstruction and form high-valence Co δ+ (CoOOH). Then, CoOOH acquires electrons from the 4 f -orbital of Ce through the Ce-O-Co interface, rather than from the M−O bond, thus ensuring OER stability. For water splitting, bifunctional CeO 2 /CoP-assembled electrolyzer requires a cell-voltage of only 1.54 V to achieve 10 mA cm −2 and retains 89.5 % of its activity after 72 h of cycling. It highlights that leveraging electron-buffering metal species can enhance the LOM stability, thereby enabling its application in bifunctional electrocatalysis.
研究领域:
材料科学
·
电化学
·
催化
·
纳米技术
·
能量转换
✓ 已验证
产品关联
DOI
高影响因子
FOOD CONTROL
·
2024
·
IF 5.6
Yiting Zhou,Jingming Zhou,Yankai Liu,Yumei Chen,Hongliang Liu,Xifang Zhu,Peiyang Ding,Chao Liang,Enping Liu,Sixuan Wu,Aiping Wang
A novel electrochemical immunosensor for the sensitive detection of monensin (MON) was developed. The sensor platform utilized anti-MON monoclonal antibodies and a nanocomposite (Ce-MOF@AgAuNPs), composed of cerium-based metal-organic frameworks decorated with silver-gold nanoparticles. The physicochemical properties of the Ce-MOF@AgAuNPs nanocomposite were investigated using transmission electron microscopy, energy dispersive X-ray, UV–Vis spectrophotometry, and fourier transform infrared techniques. The stepwise fabrication process and electrochemical performance of the immunosensor were investigated through electrochemical impedance spectroscopy and cyclic voltammetry. The sensor exhibited excellent analytical performance for MON detection, with a wide linear response range from 0.05 to 250 ng mL −1 and a low LOD of 0.008 ng mL −1 . Additionally, the immunosensor exhibited high accuracy, with recovery rates ranging from 97.4% to 103.2% in chicken liver and 96.0%–104.7% in milk. This developed immunosensor shows great potential for food safety applications, demonstrating high specificity, stability, and reproducibility in the detection of MON.
研究领域:
分析化学
·
电化学
·
食品安全
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Rong Hu,Gui-Xin Guo,Jun-An Chen,Qing Li
The development of dual-mode biosensors for the accurate detection of acid phosphatase (ACP) activity and the screening of its inhibitors is of vital importance in clinical diagnostics and environmental monitoring. In this work, we report the synthesis of Mn–Ce co-doped carbon dots (Mn&Ce@CDs) exhibiting both oxidase-mimetic catalytic activity and intrinsic fluorescence. The nanozymes efficiently catalyze the oxidation of colorless o -phenylenediamine (OPD) to produce a yellow chromogen, 2,3-diaminophenazine (DAP), characterized by a distinct absorption peak. Significantly, the excitation spectrum of DAP overlaps with the emission wavelength of Mn&Ce@CDs, resulting in an inner filter effect (IFE) that quenches the blue fluorescence of the carbon dots while simultaneously enhancing DAP's emission. This mechanism establishes a robust ratiometric fluorescence signal. The enzymatic hydrolysis of ascorbyl-2-phosphate by ACP yields ascorbic acid, which inhibits the nanozyme-catalyzed oxidation of OPD. Consequently, this leads to a decrease in DAP formation, diminishing both its characteristic absorption and the IFE-induced fluorescence quenching, thus producing a dual-signal response. Quantitative ACP detection exhibited a linear range of 0.5–15 U/L with limits of detection of 0.037 U/L in fluorescence mode and 0.49 U/L in colorimetric mode. The platform demonstrated high selectivity and reliability, showing recovery rates of 97.7–109.3 % (fluorescence) and 97.9–107.5 % (colorimetric) in spiked serum samples. Additionally, smartphone-based RGB analysis enables rapid on-site detection. The system was successfully applied for screening ACP inhibitors, with chlorpyrifos exhibiting IC 50 values of 50.45 μg/mL (fluorescence) and 43.77 μg/mL (colorimetric). This integrated dual-mode approach offers a powerful, reliable tool for clinical diagnostics and environmental assessment.
研究领域:
生物传感器
·
纳米技术
·
酶活性检测
·
环境监测
·
临床诊断
·
荧光光谱学
·
纳米酶
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Yi Xiao,Pengcheng Huang,Fang-Ying Wu
α-Glucosidase, which directly involves in the metabolism of starch and glycogen and causes an increase in blood sugar level, is the major target enzyme for the precaution and therapy of type II diabetes. Based on the previous work, we adopted a post-synthetic modification method to encapsulate Tb 3+ into Ce-MOF nanozyme which owned mixed valence states. Tb@Ce-MOF displayed induced luminescence characteristic and exceptional oxidase-like activity that could oxidize colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue ox-TMB. α-Glucosidase can hydrolyze the substrate l -ascorbic acid-2- O -α- d -glucopyranosyl (AAG) to generate ascorbic acid (AA), which could increase the Ce 3+ /Ce 4+ redox valence mode in Tb@Ce-MOF, leading to the inhibition of the allochroic reaction of TMB and the decreased absorption of ox-TMB at 652 nm. The energy transfer (EnT) process from Ce 3+ to Tb 3+ will enhance due to the increased Ce 3+ /Ce 4+ mode in Tb@Ce-MOF, which will result in an enhanced fluorescence signal of Tb@Ce-MOF at 550 nm. But the addition of inhibitor acarbose will inhibit the above process. We have constructed a dual-mode detection platform of α-glucosidase and its inhibitor via colorimetric and fluorometric method. The linear range of α-glucosidase were 0.01–0.5 U/mL (colorimetric mode) and 0.8–1.5 U/mL (fluorometric mode), respectively, with a detection limit as low as 0.0018 U/mL. Furthermore, our approach was also successfully employed to the analysis of α-glucosidase in serum samples.
研究领域:
分析化学
·
生物化学
·
材料科学
·
糖尿病研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2017
·Vol. 19
·期 7
·5333-5342
·
IF 4.123
Shu-xian Wang,Rui-tang Guo,Wei-guo Pan,Ming-yuan Li,Peng Sun,Shu-ming Liu,Shuai-wei Liu,Xiao Sun,Jian Liu
It was well recognized that Pb had a poisoning effect on a SCR catalyst. In this study, the deactivation mechanism of Pb on the Ce/TiO2 catalyst was investigated based on the characterization results of TPD and in situ DRIFT studies. It was found that the addition of Pb on the Ce/TiO2 catalyst not only inhibited the adsorption and activation of NH3 species, but also led to the decrease of the activity of adsorbed NH3 species in the SCR reaction. The adsorption of NOx species and the oxidation of NO by O2 over the Ce/TiO2 catalyst were also suppressed by the addition of Pb, while the reactivity of adsorbed NO2 species did not decrease. Moreover, the results revealed that the NH3-SCR reaction over the Ce/TiO2 catalyst followed both the E–R and L–H mechanisms, while the NH3-SCR reaction over Ce/TiO2-Pb was mainly controlled by the L–H mechanism. The contributions of the L–H mechanism to the SCR reactions over Ce/TiO2 and Ce/TiO2-Pb decreased with increasing reaction temperature. The deactivation of Ce/TiO2-Pb was mainly attributed to the suppressed NH3 adsorption and activation, accompanied by the inhibited NO oxidation and the decrease of Brønsted acid sites.
研究领域:
环境催化
·
大气污染控制
·
材料化学
·
表面科学
·
物理化学
✓ 已验证
DOI
高影响因子
Research
·
2023
·
IF 11
Guangchun Song,Jia Xu,Hong Zhong,Qi Zhang,Xin Wang,Yitong Lin,Scott P. Beckman,Yunbo Luo,Xiaoyun He,Jin-Cheng Li,Kunlun Huang,Nan Cheng
The enzyme-mimicking catalytic activity of single-atom nanozymes has been widely used in tumor treatment. However, research on alleviating metabolic diseases, such as hyperglycemia, has not been reported. Herein, we found that the single-atom Ce-N4-C-(OH)2 (SACe-N4-C-(OH)2) nanozyme promoted glucose absorption in lysosomes, resulting in increased reactive oxygen species production in HepG2 cells. Furthermore, the SACe-N4-C-(OH)2 nanozyme initiated a cascade reaction involving superoxide dismutase-, oxidase-, catalase-, and peroxidase-like activity to overcome the limitations associated with the substrate and produce •OH, thus improving glucose intolerance and insulin resistance by increasing the phosphorylation of protein kinase B and glycogen synthase kinase 3β, and the expression of glycogen synthase, promoting glycogen synthesis to improve glucose intolerance and insulin resistance in high-fat diet-induced hyperglycemic mice. Altogether, these results demonstrated that the novel nanozyme SACe-N4-C-(OH)2 alleviated the effects of hyperglycemia without evident toxicity, demonstrating its excellent clinical application potential.
研究领域:
纳米技术
·
生物化学
·
代谢疾病
·
药理学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）