CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Qu Ai,Shi-Kuan Sun,Peng-Wei Hao,Yuan-Bin Chen,Yi Zhao,Sheng-Heng Tan,Wei-Chao Bao,Wei-Ming Guo,Hua-Tay Lin,Lewis R. Blackburn
Zirconolite wasteforms were designed for the co-immobilisation of CeO 2 (as a PuO 2 surrogate) and metallic iron, chromium, and aluminum , simulating contaminated FeCrAl alloy cladding. Zirconolite ceramics with the target composition Ca (1-3.87x) Ce 3.87x ZrTi (2-7.73x) Fe 5.73x Cr x Al x O 7 (x = 0–0.11), were synthesised via solid state reaction sintering at 1400 °C. Phase and microstructural evolution were investigated to ensure the oxidation of the metals, formation of zirconolite phase and densification of the final ceramics. It was found that both oxidation and solid-state reaction could be accomplished by processing at 900 °C and 1400 °C under ambient atmosphere, accompanied by the overall yield of zirconolite in the range 92.4–94.0 wt % between x = 0.01–0.07 f.u., with a dense microstructure observed. Polytype transitions from zirconolite-2M to -3T were evidenced, where the solubility limit was reached at substitution level of x = 0.11 and precipitation of CeO 2 was apparent. XPS analysis confirmed that an elevation in dopant concentration resulted in the partial reduction of Ce 4+ to Ce 3+ , whereas Fe, Cr and Al metals were oxidised to the trivalent state. This study demonstrated the feasibility for designing advanced ceramic wasteforms for the co-immobilisation of actinides and metallic cladding residues.
研究领域:
核废物管理
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材料科学
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陶瓷
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放射性废物固化
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DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2019
·Vol. 43
·期 6
·2075-2085
·
IF 3.343
Rong Dai,Ziliang Zheng,Chenshuai Lian,Xing Li,Xu Wu,Xia An,Xianmei Xie
Summary A novel Pt-based Beta encapsulated CeO 2 yolk-shell catalyst was successfully synthesized via a RF layer in the synthetic process. The CeO 2 @Pt-Beta catalyst showed high catalytic activity and stability toward the LT-ESR with respect to the reference Pt-Beta, CeO 2 -Pt-Beta, which benefited from the special yolk-shell structure and the synergistic effect between the CeO 2 movable core and Pt metal. The confinement effect of the yolk-shell architecture contributed to the high dispersion of Pt nanoparticles as well as to the accumulation of reactant molecules in the enclosed void space, which ensured the reactants reacted with CeO 2 and Pt to achieve a complete reaction.
研究领域:
化学工程
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材料科学
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能源科学
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产品关联
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Chen Cui,Naxin Liu,Qiurui Nian,Yuntao Xia,Liuchuang Zhao,Leqian Hu,Hongjuan Bai,Dechen Jiang
Improvement in the sensitivity and accuracy of ECL-based biosensors, to a great extent, depends on the fabrication of high-performance electrochemiluminescence (ECL) sensors. Herein, polyethyleneimine (PEI)-grafted bimetallic ZnNi metal-organic framework (ZnNi-MOF/PEI) nanospheres were synthesized to prepare a L012-based ECL immunosensor for detecting carbohydrate antigen 15-3 (CA15-3). The introduced PEI was utilized not only as a bridging element for L012 luminophore and detection antibody (Ab 2 ) immobilization but also as a co-reactant for generating the self-enhanced ZnNi-MOF/PEI-L012@Ab 2 ECL signal probe. Furthermore, Pt nanoparticle-functionalized CeO 2 nanorods (CeO 2 -Pt) featuring high-efficiency electrocatalytic properties, as a co-reaction accelerator, could catalyze H 2 O 2 to generate abundant reactive oxygen species (ROS), further augmenting the ECL signal of ZnNi-MOF/PEI-L012@Ab 2 . In the presence of CA15-3 antigen, the capture antibody (Ab 1 )-conjugated CeO 2 -Pt complex (CeO 2 -Pt@Ab 1 ) and ZnNi-MOF/PEI-L012@Ab 2 would get closer to each other, with the formation of a "signal-on" sandwich-type ECL immunosensor. The ZnNi-MOF-assisted ECL biosensor achieved a detection limit of down to 5.75✕10 -5 U mL -1 . This work shows distinguished potential for measuring low levels of biomarkers that may help in the clinical diagnosis of breast cancer.
研究领域:
分析化学
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生物化学
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生物医学工程
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癌症研究
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产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2018
·
IF 5.807
Zheng-Zhe Zhang,Ya-Fei Cheng,Lian-Zeng-Ji Xu,Yu-Hui Bai,Jia-Jia Xu,Zhi-Jian Shi,Yang-Yang Shen,Ren-Cun Jin
The increasing use of engineered metal oxide nanoparticles (MONPs) in consumer products raises great concerns about their environmental impacts, but their potential impacts on anaerobic ammonium oxidation (anammox) process in wastewater treatment remain unclear. In this study, the presence of MONPs (1, 50, 200 mg L −1 ) exhibited no visible effects on the nitrogen removal performance of anammox reactors, but high levels (200 mg L −1 ) of SiO 2 NPs, Al 2 O 3 NPs and CeO 2 NPs had a distinct effect on shaping the anammox community. Long-term exposure of MONPs caused different responses in the relative abundance of Ca. Kuenenia , the level of functional gene Hzs A and the activities of three key enzymes involved in anammox metabolism, but no significant inhibition effects on specific anammox activity were detected. Overall, the effects of MONPs on anammox community structure and sludge properties depended on their types and levels and followed the order SiO 2 > CeO 2 > Al 2 O 3 > TiO 2 .
研究领域:
环境科学
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废水处理
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微生物学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Hongwu Liao,Chong Wang,Jiaxian Zheng,Zhuo Chen,Yulin Zhou,Chengning Ye,Xiangfeng Lin,Meng An,Yusuke Yamauchi,Yusuke Asakura,Zhanhui Yuan
Photocatalytic depolymerization of lignin offers a sustainable approach to producing high-value-added aromatic compounds. Recently, carbon nitride has demonstrated notable selectivity for the C C bonds in lignin model compounds. However, limitations of pure carbon nitride include the low mobility of photogenerated electrons and the difficulty in precisely controlling the cleavage pathways and products of C C bonds. In this study, we constructed an S-Scheme heterojunction by in situ loading of Ce ions onto C 3 N 4 to form a CeO 2 /C 3 N 4 composite. This heterojunction achieves efficient lignin depolymerization under blue LED irradiation in an oxygen-rich environment. Comparative analysis indicated that the yield of primary products, benzaldehyde and phenyl formate, increased by 7.8-fold and 7.75-fold, respectively, compared with pure CeO 2 , and by 1.4 and 1.8 times relative to unmodified C 3 N 4 . After optimizing the reaction conditions, dealkalized lignin is applied to the system and successfully depolymerized. Comprehensive characterization and theoretical simulations verify the heterojunction's ability to enhance carrier separation and redox activity, with CeO 2 serving as an active dehydrogenation site that significantly boosts the depolymerization efficiency of lignin model compounds. This photocatalytic strategy presents a valuable step forward in lignin valorization and supports the sustainable utilization of biomass resources.
研究领域:
光催化
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木质素高值化
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生物质转化
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材料科学
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环境化学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2025
·
IF 5.6
Dongya Liu,Shaohan Xing,Xiuping Chen
Interface engineering via the construction of heterojunctions to accelerate electron transfer is an effective strategy for enhancing electrocatalytic activity. This study designed and synthesized a NiFe 2 O 4 /CeO 2 Mott–Schottky (M–S) heterojunction for efficient urea oxidation reaction (UOR), which exhibits exceptional activity with a current density of 50 mA cm −2 at 1.40 V (vs. RHE). Spectroscopic analyses validate the formation of the M–S heterojunction, where a significant work function difference drives spontaneous electron transfer from NiFe 2 O 4 to CeO 2 through Ni–O–Ce bridge, thereby establishing a strong built-in electric field. This interfacial charge rearrangement precisely modulates the electronic structure of the Ni sites, enhancing initial urea adsorption and lowering the d -band center. Such modulation weakens intermediate binding and reduces the energy barrier for the rate-determining CO 2 desorption step. The utility of NiFe 2 O 4 /CeO 2 is demonstrated through reduced energy consumption in hybrid water electrolysis along with improved efficiency and longevity in urea-assisted zinc–air batteries. This study elucidates the effectiveness of M–S heterojunction engineering for developing highly efficient catalysts for advanced energy conversion and storage.
研究领域:
电化学
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催化
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材料科学
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能量转换
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纳米技术
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表面科学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2021
·Vol. 9
·期 44
·9204-9212
·
IF 6.331
Xinyue Guo,Zongjia Li,Sitong Liu,Miaomiao Zhang,Yanxue Guan,Juan Qin,Xiaomeng Li,Bailin Zhang,Jilin Tang
Studying the influence of nanomaterials on the microstructure and mechanical properties of cells is essential to guide the biological applications of nanomaterials. In this article, the effects of the first synthesized PDA@CeO2 nanoparticles (NPs) with multiple ROS scavenging activities on cell ultra-morphology and mechanical properties were investigated by atomic force microscopy (AFM). After the cells were exposed to PDA@CeO2 NPs, there was no obvious change in cell morphology, but the Young's modulus of the cells was increased. On the contrary, after the cells were damaged by H2O2, the secreted molecules appeared on the cell surface, and the Young's modulus was decreased significantly. However, PDA@CeO2 NPs could effectively inhibit the reduction of the Young's modulus caused by oxidative stress damage. PDA@CeO2 NPs could also protect F-actin from oxidative stress damage and maintain the stability of the cytoskeleton. This work investigates the intracellular antioxidant mechanism of nanomaterials from the changes in the microstructure and biomechanics of living cells, providing a new analytical approach to explore the biological effects of nanomaterials.
研究领域:
纳米技术
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生物物理学
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细胞生物学
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材料科学
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DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Yusheng Qiu,Shuzhuang Sun
The activity and selectivity of catalytic reactions are profoundly influenced by metal–support interactions. The strong metal–support interaction (SMSI) plays a critical role in selectively driving the conversion of CO2 toward CO instead of CH4 in Ni-based catalytic systems. Moreover, the dispersion of active species governs the population of accessible reaction sites, thereby enhancing catalytic activity. In this work, highly efficient SMSI was successfully constructed via steam aging post-treatment over CeO2–Al2O3 nanocrystalline loaded Ni catalysts (NiCeAl). Remarkably, the NiCeAl–H2O catalyst achieves ∼50% CO2 conversion with 90% CO selectivity at 600 °C, representing a dramatic improvement over the untreated NiCeAl catalyst (23% CO2 conversion with ∼92% CO selectivity). Furthermore, the steam-treated catalyst demonstrates superior stability in prolonged CO2 hydrogenation tests, maintaining its performance with only a ∼4% conversion decrease over 10 h of continuous operation. In situ diffuse reflectance infrared Fourier transform spectroscopy analysis revealed that CO2 chemisorbs on the catalyst surface to form bidentate carbonates, which undergo sequential hydrogenation to form formate intermediates. These formate species subsequently decompose catalytically to produce CO, with the enhanced MSI in NiCeAl–H2O facilitating optimal CO desorption kinetics, thereby promoting superior reverse water–gas shift activity.
研究领域:
催化
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材料科学
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化学工程
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环境化学
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产品关联
DOI
高影响因子
BIOMATERIALS
·
2023
·
IF 14
Cai Feng,Zongling Xiong,Xianting Sun,Hao Zhou,Tianming Wang,Ying Wang,Harrison X. Bai,Peng Lei,Weihua Liao
It is a challenging task to develop a contrast agent that not only provides excellent image contrast but also protects impaired kidneys from oxidative-related stress during angiography. Clinically approved iodinated CT contrast media are associated with potential renal toxicity, making it necessary to develop a renoprotective contrast agent. Here, we develop a CeO 2 nanoparticles (NPs)-mediated three-in-one renoprotective imaging strategy, namely, i) renal clearable CeO 2 NPs serve as a one-stone-two-birds antioxidative contrast agent, ii) low contrast media dose, and iii) spectral CT, for in vivo CT angiography (CTA). Benefiting from the merits of advanced sensitivity of spectral CT and K-edge energy of Cerium (Ce, 40.4 keV), an improved image quality of in vivo CTA is successfully achieved with a 10 times reduction of contrast agent dosage. In parallel, the sizes of CeO 2 NPs and broad catalytic activities are suitable to be filtered via glomerulus thus directly alleviating the oxidative stress and the accompanying inflammatory injury of the kidney tubules. In addition, the low dosage of CeO 2 NPs reduces the hypoperfusion stress of renal tubules induced by concentrated contrast agents used in angiography. This three-in-one renoprotective imaging strategy helps prevent kidney injury from being worsened during the CTA examination.
研究领域:
医学影像
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纳米技术
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放射学
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肾病学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 7
·3087-3096
·
IF 3.288
Gang Li,Peng Sun,Fanggen Wu,Jie Zhao,Dongxue Han,Guofeng Cui
4-Aminophenol (4-AP) is a highly toxic environmental pollutant and contaminant of medicine, which is widely used in industries and daily life. Therefore, the development of a reliable sensor for determining the amount of 4-AP is of great importance for the protection of human and environmental health. Herein, by fabricating a Pd@CeO2 composite on a nanoporous gold-coated carbon fiber paper (NPG/CFP), the sensing properties for 4-AP can be largely enhanced. Combining the significant increase in the catalytic activity of the Pd@CeO2 composite (derived from the strong interactions between Pd and CeO2) with the NPG and NPG/CFP hierarchical porous structure having a high electrochemically active surface area, the electrode achieved excellent detection of 4-AP. It manifested an extremely high sensitivity of 75.4 μA μM−1 and 56.5 μA μM−1 in the concentration range from 0.005 μM to 0.03 μM and 0.03 μM to 9 μM, respectively. The detection limit reached as low as 4 nM under optimized conditions (S/N = 3). The electrode also possesses long-term stability and presents great anti-interference ability. All these results demonstrate that the electrode is a promising candidate for future sensors for monitoring 4-AP in water and pharmaceuticals.
研究领域:
分析化学
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环境科学
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材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Liang Li,Chao-qun Wu,Zhi-xuan Zhang,Nan Zhang,Ting Huang,Yong Wang
The rapid development of modern industry has exacerbated water pollution, posing significant threats to environmental sustainability and human health. Semiconductor heterostructures have emerged as a promising strategy to enhance the photochemical properties and catalytic activity of heterogeneous catalysts, offering a viable solution to water pollution challenges. In this study, a series of CeO2/CdSe catalysts was successfully synthesized via chemical deposition. The results demonstrate that CdSe nanoparticles could effectively modulate the band gap, enhance visible light absorption ability, and improve the photochemical performance of CeO2/CdSe composites. The catalytic activity and practical application prospects of the as-synthesized samples were evaluated by reducing hexavalent chromium (Cr(VI)) and decomposing tetracycline hydrochloride (TCH). CeO2/CdSe composites exhibited significantly higher photocatalytic activities compared to pure CdSe and CeO2. Notably, CeO2/0.6CdSe demonstrated the highest photocatalytic activity, achieving 93.6% removal of Cr(VI), which was 4.39 and 1.77 times as high as those of pure CeO2 and CdSe in sequence. Furthermore, CeO2/0.6CdSe achieved a remarkable TCH removal rate of 97.0%. The enhanced photocatalytic performance of CeO2/0.6CdSe is attributed to the formation of heterojunction structures between CdSe and CeO2, which facilitates efficient charge separation and transfer. Cyclic experiments confirmed the excellent anti-interference ability and sustainability of CeO2/0.6CdSe. Reduction mechanisms of Cr(VI) and degradation mechanisms of TCH were thoroughly investigated, with DFT mechanistic analysis providing further insights into the superior catalytic activity of CeO2/0.6CdSe. This work highlights the potential of CeO2/0.6CdSe as a highly efficient photocatalyst with broad applications in wastewater treatment.
研究领域:
环境科学
·
材料化学
·
纳米技术
·
光催化
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Jin Song,Fenglong Wu,Yulun Lu,Xinyan Zhang,Zhiwan Li
The effective separation of electron–hole pairs of the support plays an important role in improving the activity of a supported photocatalyst under visible-light irradiation. Herein, we constructed a CeVO4/CeO2 type-II heterojunction with strong electronic interactions and rich oxygen vacancies due to only minor lattice mismatch by the significantly changed crystal structure of two materials in the absence of an additional structure-directing agent in the calcination process. The CeVO4/CeO2 nanocomposites as supports for Co nanoparticles (NPs) exhibited remarkable photocatalytic performance for H2 evolution from ammonia borane (NH3BH3) at 25 °C. Experimental results clearly showed that a Co catalyst with a CeVO4/CeO2 nanocomposite in a 2:1 mol ratio had the best photocatalytic performance with a total turnover frequency (TOF) value of 90.9 min–1. The structure characterizations indicated that the excellent H2 evolution performance was attributed to the formation of type-II heterojunction with strong electronic interactions and rich oxygen vacancies between CeVO4 and CeO2 by the conversion of the crystal structure of two materials in the calcination process, which accelerated the separation and migration of electron–hole pairs, leading to increased electron density of Co NPs. This work underlines the importance of heterojunction construction and paves a way to designing heterostructure catalysts for photocatalytic H2 production from NH3BH3 under light irradiation with a wavelength range of 420–780 nm.
研究领域:
材料科学
·
化学
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光催化
·
能源材料
·
纳米技术
✓ 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）