Journal of Materials Chemistry B
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2016
·Vol. 4
·期 17
·2963-2971
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IF 4.872
Yongbei Zhao,Qi Wang,Jianxiu Li,Hongmin Ma,Yong Zhang,Dan Wu,Bin Du,Qin Wei
In this paper, amidogen graphene (NH2-Gr) and Au nanoparticle (NP) functionalized cerium oxide (CeO2) NPs (NH2-Gr/Au@CeO2) have been synthesized. The prepared NH2-Gr/Au@CeO2 exhibits strong electrochemiluminescence (ECL) activity which could be quenched efficiently by bismuth sulfide (Bi2S3). Based on this principle, a novel sandwich ECL immunosensor was constructed for the detection of prostate specific antigen (PSA). NH2-Gr was used as a loading matrix for CeO2 NPs because of its superior conductivity and a large surface area. Au NPs were used to combine anti-PSA 1 (Ab1) to CeO2via the Au–NH2 covalent bond and meanwhile to enhance the sensitivity of the immunosensor. NH2-Gr/Au@CeO2 was used as the ECL response layer. Ag NP functionalized Bi2S3 was used to label the secondary antibody (Ab2). After a sandwich-type immunoreaction, a remarkable decrease of the ECL signal was observed. The signal-off sensor showed a wide linear range response from 1 pg mL−1 to 10 ng mL−1 with a low detection limit (LOD) of 0.3 pg mL−1. The applicability of the proposed ECL immunosensor was evaluated by detecting PSA in human serum samples.
研究领域:
生物医学工程
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分析化学
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DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2013
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IF 5.825
Qizhou Dai,Jiayu Wang,Jie Yu,Jun Chen,Jianmeng Chen
A magnetic core/shell CeO 2 nanometer catalyst particle of Fe 3 O 4 @SiO 2 @CeO 2 for ozonation was prepared and the catalytic activity was evaluated by the degradation of acetylsalicylic acid (ASA). The characterizations of the magnetic nanoparticles, such as TEM, XRD and EDX, showed that Fe 3 O 4 @SiO 2 @CeO 2 had a ternary structure with a Fe 3 O 4 magnetic core, a silica membrane mid-layer and CeO 2 outer layer. The catalysts of Fe 3 O 4 @SiO 2 @CeO 2 showed an obviously high efficiency in catalytic ozonation on the degradation of ASA, and thus could also enhance the TOC removal. The ASA removal with Fe 3 O 4 @SiO 2 @CeO 2 catalyst at 60 min could reach 81.0%, while 67.3% with Fe 3 O 4 @SiO 2 , 66.1% with Fe 3 O 4 and only 64.1% with ozonation alone. Fe 3 O 4 @SiO 2 @CeO 2 catalysts could also enhance the ozone utilization during the reaction. The effect of radical scavengers showed that the high removal efficiency of catalytic ozonation over Fe 3 O 4 @SiO 2 @CeO 2 may be mainly attributed to surface reactions. According to stability and recyclability test of the Fe 3 O 4 @SiO 2 @CeO 2 catalysts, the results showed that the catalysts would be helpful in the separation and magnetic recyclability. In addition, based on the intermediates detected by GC/MS, a possible degradation pathway of ASA was proposed.
研究领域:
环境科学
·
催化材料
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xiaoyan He,Dan Su,Xiuqin Bai,Chengqing Yuan
Ceria (CeO2) nanoparticles with haloperoxidase (HPO)-like activity have gained attention as a biologically benign antifoulant. 3,4-Dihydroxy-l-phenylalanine (DOPA), a main composition in mussel foot proteins, plays a crucial role in the biofouling process. However, the impact on the HPO-like activity and antifouling performance of CeO2 nanoparticles when DOPA molecules adsorb on them remains unexplored. This interesting question warrants investigation, particularly considering that it may occur in an actual marine environment. Herein, the interaction between DOPA and CeO2 is explored. Despite the higher Ce3+ fractions and the lower band gap energies due to the electron transfer from DOPA to the CeO2 surface, DOPA still had a slightly negative effect on the HPO-like activity of CeO2 since they decreased the exposed Ce3+ sites. The DOPA-CeO2 nanocomposites with HPO-like activities could kill bacteria and trigger quorum-sensing signaling quenching, achieving a biofilm inhibition performance. Amazingly, 0.1% DOPA-CeO2 nanocomposite exhibited higher antibacterial activity and better biofilm suppression activities due to its HPO-like activity and positive zeta potential. The remarkable results demonstrated that DOPA, as a participant in the biofouling process, could enhance the antibacterial activity and antifouling performance of CeO2 nanoparticles at an appropriate concentration.
研究领域:
材料科学
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生物医学工程
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微生物学
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产品关联
DOI
PubMed
高影响因子
Journal of CO2 Utilization
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2021
·
IF 7.132
Ziyi Zhao,Xiaotong Li,Jianghao Wang,Xiangzhou Lv,Hao Bin Wu
Electrochemical reduction of carbon dioxide to value-added fuels offers a promising method to solve increasingly serious environmental problems and alleviate energy crisis. Herein, we report a facile method by coating Cu electrode with CeO 2 nanoparticles to largely enhance the C 2+ products selectivity during CO 2 electroreduction. The Faradaic efficiency of C 2+ products for optimal CeO 2 -coated Cu electrode reached a high value of 61 % at -1.05 V vs RHE, and exhibited good stability for over 9 h of CO 2 electrolysis. The CeO 2 nanoparticles were found to induce oxidative corrosion of the Cu foil, leading to a CuO x layer in contact with the CeO 2 nanoparticles. The interface between CeO 2 nanoparticles and oxide-derived Cu might be attributed to the enhanced catalytic activity for C 2+ products by promoting the C C coupling process.
研究领域:
化学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
INTEGRATED FERROELECTRICS
·
2023
·
IF 0.7
Kang-Qiang Liu,Chuan-Bao Wu,Si-Yu Zhou
ABSRACTFor achieving a uniform and stable suspension of CeO2 nanoparticles in aqueous medium, Al3+ was doped into the lattice of CeO2 by hydrothermal treatment. Although the doping will increase the probability of adhesion of primary particles with the size of 7 nm, it can effectively prevent the agglomeration between CeO2 particles, greatly improve the dispersion uniformity and suspension stability of particles, greatly narrow the particle size distribution of secondary particles, and make the degree of particle agglomeration controllable. Meantime, the UV absorption property of the product was improved and the absorption peak was red shifted after Al3+ doping.
研究领域:
材料科学
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纳米技术
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化学工程
✓ 已验证
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Zhipeng Guo,Tingting Zhang,Zhao Chen,Junpeng Niu,Md Rasel,Enze Luo,Yuetong Li,Nan Xu,Mahmood Ul Hassan,Hafiz Abdul Kareem,Quanzhen Wang,Xuebing Yan,Yuxia Guo
“Nanophytovirology” is a potential management approach to combat plant viral diseases. Herein, the impact of foliar application of CeO2 nanoparticles (CeO2-NPs) on the growth, plant cell ultrastructure, and physiology of alfalfa mosaic virus (AMV)-infected alfalfa seedlings was explored at different concentrations and application strategies. In a solar greenhouse, 20 mL of CeO2-NP suspensions of 50, 100, 200, and 500 mg/L was sprayed onto the plant surface every other day for 9 days. As a result, the total volume applied per pot was 100 mL. It showed that the beneficial effects of CeO2-NPs on infected alfalfa seedlings were dependent on the concentration and application period. Compared to the infected control, foliar application with 100 mg/L CeO2-NPs before AMV infection (CeO2-NPs-BVI) showed the greatest virus suppression efficacy; significantly reduced the disease indices by 58.87%; improved growth, yield, and nutritional quality; and significantly increased plant height, plant dry biomass, crude protein, and crude fat contents and relative feeding value by 15.17, 37.12, 18.77, 71.19, and 10.09%, respectively. Moreover, CeO2-NPs-BVI maintained the chloroplast quantity and structure of leaf cells and significantly enhanced the chlorophyll content and photosynthesis rate of alfalfa leaves by 36.14 and 40.13%, respectively, as compared to infected control. Mechanistically, cell ultrastructure, physiology, and transcriptomic analyses revealed that (1) CeO2-NPs effectively mitigated AMV-induced chloroplast structure damage, subsequently enhancing photosynthesis and carbon fixation in photosynthetic organisms, providing sufficient energy and antiviral activities for maintaining plant growth and development; (2) CeO2-NPs reduced the AMV’s ability to bind to host receptors and evade host immune recognition, significantly activating and boosting plant systemic immunity by down-regulating ABA and ETH levels and upregulating SA, IAA, and BR levels; (3) CeO2-NPs activated the plant antioxidative systems to eliminate excess reactive oxygen species. These findings provide significant insight into the potential of CeO2-NPs as highly efficient antiviral agent.
研究领域:
植物学
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病毒学
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纳米生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 4
·044516
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IF 4.316
Lei Yanhua,Ning Tan,Da Huo,Mengchao Ding,Yuliang Zhang,Tong Liu,Ruixuan Yu,Sha Cheng,Runhua Fan
The oxygen reduction reaction (ORR) is a crucial cathodic process and a technology providing renewable energy. It is essential to create ORR catalysts not containing noble metals yet still affordable and possessing high-efficiency and long-term durability. Therefore, this work developed a highly porous N-doped carbon catalyst embedded with CeO2 nanoparticles (NPs). This composite catalyst was synthesized by pyrolysis of PANI-encapsulated CeO2 NPs (CeO2/PANI) combined with in situ polymerization. The resulting catalyst exhibited an outstanding ORR performance with 0.94 and 0.81 mV onset and positive half-wave potentials, respectively, and 5.52 mA cm−2 diffusion-limited current density. The catalyst also demonstrated excellent stability. These exceptional characteristics indicate that a synergy of the N-doped carbon and CeO2 NPs provide a novel strategy of fabrication of novel ORR catalysts without using noble-metals for applications related to fuel cells and metal-air batteries.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
POLYMER TESTING
·
2021
·
IF 4.282
Zhicheng Zhao,Yanjun Ma,Hongqi Wan,Yinping Ye,Lei Chen,Huidi Zhou,Jianmin Chen
CeO 2 nanoparticles prepared by the in-situ synthesis method were used to strengthen the polyamide-imide/polytetrafluoroethylene (PAI/PTFE) lubricating coatings. The crystalline phases and micro-structure of the lubricating coatings were characterized by XRD and SEM. A CSM friction machine was used to test the tribological properties of the coatings. The experimental results showed that CeO 2 nanoparticles synthesized in-situ in the PAI/PTFE coatings had good dispersion and a narrow range of particle size (about 80 nm–110nm). The addition of CeO 2 nanoparticles could effectively promote the micro-hardness and anti-wear performance of the coatings. Furthermore, the PAI/PTFE lubricating coating filled with 5 wt% CeO 2 nanoparticles exhibited superior micro-hardness and wear resistance. In practical applications, The PAI/PTFE lubricating coating filled with 5 wt% CeO 2 nanoparticles is more suitable for high max sliding velocity and low applied load.
研究领域:
材料科学
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摩擦学
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产品关联
DOI
高影响因子
Applied Surface Science Advances
·
2024
·
IF 7.5
Chao Zhao,Xinyu Wu,Tianqi Cheng,Tsz Yeung Yip,Bo Yuan,Wanqing Dai,Shengpei Zhang,Yuwei Qiu,Jian Lin Chen,Shang-Wei Chou,Yung-Kang Peng
Marine biofouling poses significant challenges for maritime industries, leading to increased maintenance costs and ecological disturbances. While Cu-based biocide coatings are effective in combating biofouling, they raise environmental concerns and have limited lifespans. This has spurred interest in sustainable alternatives inspired by marine organisms, such as haloperoxidases (HPOs) found in certain algae, which can convert H 2 O 2 and Br − in seawater into HOBr to mitigate biofouling. However, the practical implementation of HPOs is limited by their stability and cost. Nanozymes like CeO₂ have emerged as promising alternatives; however, conventional coating methods—typically involving the replacement of Cu-based biocides with CeO 2 nanoparticles (NPs) in resin—restrict their exposure to H 2 O 2 and Br⁻, resulting in significant activity loss. This study presents a simple method for mass-producing CeO 2 NPs embedded in free-standing porous carbon as HPO mimetics. The optimized sample demonstrates exceptional HPO-like activity and antibacterial performance. Most importantly, we have shown that these HPO mimetics can be directly grown on steel surfaces during preparation, eliminating the need for a dispersant. This direct coating technique effectively addresses the challenges associated with conventional resin method, facilitating the development of a sustainable antibacterial and antifouling coating with preserved activity.
研究领域:
材料科学
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海洋生物学
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环境科学
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2021
·
IF 7.963
Jun Zhao,Jun Tang,Tinghui Dang
Interaction with soil mineral particles (SMPs) and organic matters can significantly determine the fate of nanoparticles (NPs) in the environment such as waters, sediments, and soils. In this study, the heteroaggregation of CeO 2 NPs with different soil minerals (kaolinite, montmorillonite , goethite and hematite) and the influence of extracellular polymeric substance (EPS) were studied. The obvious heteroaggregation between CeO 2 NPs with different SMPs were demonstrated via co-settling and aggregation kinetics experiments. The variety in the heteroaggregation between CeO 2 NPs with different SMPs is mainly induced by the difference in their surface properties, such as surface charge, specific surface areas and surface complexation. The presence of EPS can result in great inhibition on the heteroaggregation between CeO 2 NPs with the positive charged goethite by enhancing the electrostatic repulsion between NPs and mineral colloids. However, the influence of EPS on the interaction between CeO 2 NPs with negative charged SMPs is more dependent on the steric stabilization. The presence of EPS may promote the migration of CeO 2 NPs in environment and then increase their risks to human health and ecosystems. These findings contribute to better understanding interactions between NPs and SMPs and have important implications on predicting the behaviors and risks of NPs in the natural environment.
研究领域:
环境科学
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纳米生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Jingyang Luo,Wangbei Cao,Wen Guo,Shiyu Fang,Wenxuan Huang,Feng Wang,Xiaoshi Cheng,Wei Du,Jiashun Cao,Qian Feng,Yang Wu
Various pollutants commonly co-exist in the waste active sludge (WAS), but the interactive effects and mechanisms of co-occurrence pollutants on the WAS treatment remain unclear. This work mainly investigated the impacts of different surfactants ( i.e., HTAB and SDBS) and CeO 2 nanoparticles (NPs) co-occurrence on the WAS fermentation for short-chain fatty acids (SCFAs) production, and found that the CeO 2 NPs coexisting with surfactants caused antagonistic effects on the SCFAs generation (10.7% and 33.9% inhibition by HTAB and SDBS , respectively). The surfactants and CeO 2 NPs co-occurrence restrained the solubilization , hydrolysis , and acidification steps simultaneously. Moreover, the functional hydrolytic-acidogenic bacterial ( e.g., Haliangium and Bacteroidetes sp. ) and the microbial metabolic networks involved in extracellular hydrolysis ( e.g., pepd and NEU1 ), substrate metabolism ( e.g., ALDO and asdA ), and fatty acid biosynthesis ( e.g. , aarC and pct ) were all downregulated by 4.3–53.8% in the reactors with surfactants and CeO 2 NPs co-occurrence. The presence of surfactants enhanced the dispersibility and stability of CeO 2 NPs and the Ce dissolution (1.5–3.0 times higher). Also, surfactants contributed to the WAS disintegration, which could improve the interactive chances of microorganisms entrapped in WAS and CeO 2 NPs by promoting the transportation channels, and therefore aggravated the toxicity towards anaerobic species.
研究领域:
环境科学
·
微生物学
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产品关联
DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2020
·
IF 3.784
Lianbo Wang,Shilong Xing,Huabing Liu,Chuanhai Jiang,Vincent Ji
In the present work, CeO 2 nanoparticles were extra added into Ni Ti nanocomposite coating to optimize the spatial microstructures and wear properties. Before adding CeO 2 nanoparticles into Ni Ti nanocomposite coating, Ti microparticles distributed in forms of cluster in Ni deposits, leading to the spatial inhomogeneity of microstructures like local large grains and residual [200] fiber textures. Correspondingly, the hardness in small-grain regions was up to ~4456 ± 46 MPa, while the hardness in large-grain areas dropped to values as low as ~3493 ± 40 MPa. Besides that, inside pores and jagged surface were observable, confining the wear resistance capacity. The average hardness was ~3814 ± 279 MPa. After extra adding CeO 2 nanoparticles into Ni Ti nanocomposite coating, Ti microparticles homogeneously scattered throughout the whole nanocomposite coating, leading to the spatial homogeneity of microstructures and properties. Grain size steadily kept at ~40 nm and the hardness stabilized at ~4326 ± 150 MPa. Inside pores vanished, the surface became smooth, and residual [2 0 0] texture was fractured. Benefiting from the modified spatial microstructures and improved hardness, enhanced wear resistance was achieved.
研究领域:
材料科学
·
表面工程
·
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）