OPTICAL MATERIALS
·
2021
·
IF 3.08
Yu Chen,Ting Feng,Li Chen,Yiming Gao,Junwei Di
A “signal-on” fluorescence method for determination of hydrogen peroxide (H 2 O 2 ) and glucose was developed using bovine serum albumin-capped Ag nanoclusters with thirty atoms (BSA-Ag 30 NCs) as sensing probe. It was relied upon the size-dependent fluorescence of BSA-AgNCs. The prepared BSA-Ag 30 NCs have an average diameter of ~3.4 nm and exhibit a red emission at 635 nm. The fluorescence intensity of BSA-AgNCs could be enhanced by H 2 O 2 with the etching and then formation of smaller nanoclusters. Under the optimum experimental conditions, a linear calibration curve for H 2 O 2 was obtained within the concentration range of 2–200 μM with detection limit of 1.1 μM. Coupling with glucose oxidase (GOD) catalytic reaction, the BSA-Ag 30 NCs sensing platform could also be used to detect glucose. The enhancement of fluorescence intensity (F–F 0 )/F 0 was linear related to the concentration of glucose over the range 5–180 μM with detection limit of 3.4 μM. This method was successfully applied to the determination of glucose in human serum samples with satisfactory result.
研究领域:
分析化学
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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
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 41
·21661-21667
·
IF 11.301
Dongchuang Wu,Xinyue Wang,Linghao Shi,Kaiyue Jiang,Mengjia Wang,Chenbao Lu,Zhenying Chen,Pan Liu,Jichao Zhang,Diana Tranca,Yang Hou,Yu Chen,Xiaodong Zhuang
Metal clusters with exposed atomic interfaces and unique electronic structures have received considerable attention in heterogeneous catalysis. However, their potential application in the electrocatalytic CO2 reduction reaction (CO2RR) remains very challenging because metal clusters tend to drive the competitive hydrogen evolution reaction. In this study, we prepared Fe-cluster sites with positive valence anchored on ordered mesoporous carbon materials for use as an efficient and durable electrocatalyst in carbon dioxide electroreduction. The as-prepared catalyst exhibits high selectivity, with a CO faradaic efficiency of higher than 98% at a low overpotential of 0.37 V, and retains 98.5% of its initial selectivity after 50 h of electrolysis in 0.5 M KHCO3. In addition, the as-prepared catalyst exhibits enhanced selectivity of more than 95% from −0.5 to −0.8 V in 0.1 M KHCO3, has 98.6% CO faradaic efficiency at a low overpotential of 0.49 V, and retains 99% of its initial selectivity after 50 h of electrolysis, thus outperforming state-of-the-art Fe–N-based single-atom catalysts. Density functional theory calculations revealed that the atomic interfaces on the Fe clusters reduce the reaction barrier for the *COOH intermediate, thus contributing to the rapid transformation of CO2 molecules and resulting in excellent catalytic performance.
研究领域:
电催化
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多相催化
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材料科学
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环境化学
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能量转换
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DOI
高影响因子
RSC Advances
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2021
·Vol. 11
·期 28
·17431-17436
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IF 3.361
Ting Yu,Zheng-hua Qian,Lin Li,Xiao-ling Wu,Hui He,Yan-bo Qiao,Guo-an Ye
Three new thorium-based MOFs based on 1,2,4,5-tetrakis(4-carboxyphenyl)benzene (H4TCPB) were obtained under a similar reaction system (metal salt, ligand, solvent, and acid are the same). Th(IV) forms the central unit of the MOFs in mononuclear and binuclear clusters, respectively. All the MOFs show blue ligand-based luminescence under an ultraviolet environment. This is the first time that multiple thorium-based MOFs with luminescence have been found with the same ligand.
研究领域:
材料科学
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化学
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DOI
PubMed
高影响因子
Nature Protocols
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2025
·
IF 16
Zhang Fenghua,Shi Wenxiong,Liu Qingda,Wang Xun
Atomic-level manufacturing enables the bottom-up fabrication of nanomaterials with tailored structures and properties. Clusters with atomic precise structures can be used as superatom building blocks to construct superstructures with exceptional properties beyond their individual properties. However, the programmable and large-scale synthesis of cluster assemblies remains challenging. This protocol describes the detailed experimental procedures for the modular assembly of polyoxometalate (POM) clusters into subnanomaterials by programmable interactions under simple and mild conditions. In this approach different types of POM clusters (0.7–1.8 nm in size) are coated with quaternary ammonium or oleylamine ligands using either two-phase or solvothermal methods. The assembly process depends on the interactions between atom clusters, ligands and the reaction matrix, all of which can be modified to generate a library of subnanometer superstructures. The four intercluster connection modes are metal cation-induced coordinative connection, anion bridged covalent connection, synergistic noncovalent interaction and cluster–nucleus co-assembly. A library that includes single-cluster nanowires, clusterphenes and nanosheets with single-cluster thicknesses, can be prepared within 3–12 h. Owing to their ultrahigh surface atom ratio and electron delocalization, the resulting subnanometer POM assemblies with rich structural and compositional diversity exhibit excellent properties and application potential in terms of mechanics, catalysis and chirality. This procedure is suitable for users with prior expertise in the synthesis of inorganic and cluster-based nanomaterials.
研究领域:
纳米科技
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无机化学
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团簇科学
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材料科学
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超分子化学
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合成化学
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物理化学
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表面科学
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2018
·Vol. 410
·期 10
·2629-2636
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IF 3.307
Yu Huan,Chen Xinfeng,Yu Long,Sun Mingtai,Alamry Khalid A.,Asiri Abdullah M.,Zhang Kui,Zapien Juan Antonio,Wang Suhua
In this study, we have developed a facile method for preparation of highly fluorescent Au nanoclusters (AuNCs) using 11-mercaptoundecanoic acid (MUA) as both the reducing and stabilizing agent. The as-prepared MUA functionalized AuNCs (MUA-AuNCs) have good water solubility, excellent photostability, and strong fluorescence emission at 610 nm with a quantum yield of 7.28% in water. The fluorescence of MUA-AuNCs was first quenched by copper ions through electron transfer, subsequently caused obvious restoration by competitive effect after adding penicillamine, making it a potential fluorescent sensor for penicillamine with a detection limit of 0.08 μM. Furthermore, the newly designed fluorescence “on-off-on” assay was explored for the measurement of penicillamine in complex real water and urine samples with satisfactory results.
研究领域:
分析化学
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纳米生物学
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DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Liang He,Xueyan Nan,Peipei Wang,Zhizhou Liu,Tong Wang,Pengli Bai
The nonconventional polymer luminophores (NPLs) with white emission are scarce due to the challenges in regulating their clustering structures. In this work, polystyrene is employed to develop a new kind of broad-emitting clusteroluminescence (CL) through suitable cross-linking and sulfonation. The sulfonated porous poly(styrene-co-divinylbenzene) microspheres (SPDMs) exhibit broad emission spectra (400–700 nm) in the visible light region. Further characterization and theoretical calculations show that through-space conjugation (TSC) enhanced with high cross-linking and sulfonation degrees (SD) is the main factor affecting the luminescence of microspheres. Monodisperse SPDMs with a low fluorescence distribution (CV < 5%) across 13 flow channels. Additionally, SPDMs microspheres is employed to construct binary, Cu 2+ , and pH-responsive microarrays to encrypt and decode important information. Finally, SPDMs are developed for utilization as single-component white and warm white light-converting light emitting diodes (LEDs). These LEDs demonstrate Commission International de L’Eclairage (CIE) coordinates and correlate color temperatures (CCT) of (0.31, 0.321) and (0.383, 0.41), 6611 and 4100 K, respectively. Notably, the color rendering index (CRI) value for SPDMs-50-2 in white LED applications reaches an impressive 92. This study provides an economical, simple, and effective design strategy for developing NPLs with both monodispersity and broad emission.
研究领域:
材料科学
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光学
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化学
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产品关联
DOI
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 8
·1531
·
IF 4.324
Qiang Li,Yunhao Li,Heguo Li,Xiaoshan Yan,Guolin Han,Feng Chen,Zhengwei Song,Jianqiao Zhang,Wen Fan,Changfeng Yi,Zushun Xu,Bien Tan,Wei Yan
As one of the widely studied metal nanoclusters, the preparation of copper nanoclusters (Cu NCs) by a facile method with high fluorescence performance has been the interest of researchers. In this paper, a simple, green, clean, and time-saving chemical etching method was used to synthesize water-soluble Cu NCs using ascorbic acid (AA) as the reducing agent. The as-prepared Cu NCs showed strong green fluorescence (with a quantum yield as high as 33.6%) and high ion stability, and good antioxidant activity as well. The resultant Cu NCs were used for the detection of 4-aminoazobenzene (one of 24 kinds of prohibited textile compounds) in water with a minimum detection limit of 1.44 μM, which has good potential for fabric safety monitoring.Keywords:copper nanoclusters;fluorescence;detection;ascorbic acid
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
PubMed
高影响因子
Catalysts
·
2019
·Vol. 9
·期 7
·616
·
IF 3.444
Ruizhou Gan,Xiaohua Ma,Guorong Wang,Zhiliang Jin
CoSe2,as a kind of co-catalyst, would replace noble metals element to dope pure CdS. The CoSe2/CdS photocatalyst could be synthesized by simple physical mixing. With the introduction of CoSe2, especially 30% CoSe2/CdS, hydrogen production would be about 500 μmol within 5 h, five times that of pure CdS under the same conditions. The CoSe2/CdS photocatalyst could bear four cycles of hydrogen evolution and sustain the hydrogen production, with a minor decrease. In other words, the electron transition velocity would surge along with the introduction of CoSe2particles. The CoSe2could be deemed as the predator and exit of electrons to inspire the detachment of the hole-electron pairs and relieve the recombination of the hole-electron pairs.Keywords:CoSe2clusters;CdS nanorod;hydrogen evolution;photocatalysis
研究领域:
材料科学
·
能源科学
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产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2023
·
IF 7.3
Guangmin Ren,Zehui Zhao,Zizhen Li,Zisheng Zhang,Xiangchao Meng
Herein, we applied a rapid Joule heating method to form oxygen vacancies and further induced the deposition of Ru clusters onto BiVO 4 . The rapid Joule heating method fabricated oxygen vacancy on BiVO 4 , resulting in the formation of electron-rich active Ru sites and unsaturated V sites. The pristine BiVO 4 was almost no activity in photocatalytic ammonia synthesis. The photocatalytic production rate of ammonia was increased to 3.88 μmol g - 1 h -1 after the formation of oxygen vacancies, and further increased to 16.57 μmol g -1 h -1 with Ru clusters loaded on BiVO 4 . It was indicated that unsaturated V sites near the oxygen vacancy and Ru clusters might act as the reactive sites for N 2 adsorption and activation. And the strong metal-support interactions between Ru and BiVO 4 resulted in charge redistribution between Ru clusters and BiVO 4 supports, thus reducing energy barrier of the rate-determining step for the N 2 hydrogenation. Furthermore, DFT confirmed that associative alternating pathway was suitable for this process.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Jiahao Pan,Yuchen Zhang,Zhentao Pang,Yu Deng,Zhenda Lu
This work presents a high-content platform for investigating the critical interplay between the nanoparticle cluster size, structure, and plasmon-enhanced fluorescence at a single particle level. The platform enables the controlled assembly of pre-synthesized, bio-conjugatable Ag@Au nanocubes into clusters with varying sizes and configurations, ultimately arranged in an array pattern. Notably, the platform statistically reveals that Ag@Au nanocubes achieve over two orders of magnitude greater fluorescence enhancement compared to Au nanoparticles alone. Moreover, it identifies a crucial size regime for maximizing fluorescence enhancement. Clusters containing 1–4 nanocubes exhibit a direct correlation between the fluorescence intensity and the number of particles, as well as cluster configuration. Compact clusters display a significantly stronger fluorescence response compared to loosely packed configurations. This high-content platform offers a powerful approach for the rapid, simultaneous characterization of multiple nanoparticles, paving the way for efficient, large-scale fluorescence-based detection.
研究领域:
纳米技术
·
材料科学
·
光学
·
生物物理
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yuehua Pan,Yingxue Pang,Hao Fu,Zhenyu Cai,Yuxiang Deng,Zhiwei Huang,Donglou Ren,Yuezhou Wei,Xinpeng Wang
Extracting uranium from uranium waste streams, particularly utilizing zero-carbon emission photochemistry, emerges as a promising and sustainable strategy. Herein, we construct an SS@Ga/PCS composite photocatalyst, consisting of SnS 2 nanosheets as well as a metal − support produced by confining sub-nano Ga δ+ clusters in the hollow porous carbon spheres (PCS). The Ga δ+ clusters are innovatively introduced as active sites with localized hole capability to simultaneously improve visible light response and carrier separation. In-situ characterizations and theoretical calculations reveal that Ga δ+ clusters induced metal-support interaction (MSI) by optimizing the electronic structure in the PCS host; In addition, Ga δ+ clusters act as plasma excitation elements to enhance the visible light responsiveness and carrier separation of SS@Ga/PCS. Ultimately, the inhomogeneous photocatalysis of uranium extraction achieved superior performance as compared to the pure components, corresponding to an encouraging removal rate of 97.87 % and a photo-extraction capacity of up to 1867.30 mg g −1 in 50 mL of uranium waste solution, as well as a wide-concentration window adaptability and excellent catalytic robustness. More significantly, this ingenious nano-confined strategy extends the design ideas of highly dispersed sub-nanometallic cluster co-catalysts and stimulates the study of the availability of abundant reactive active sites combined with monomer strong interactions, which provides a novel insight into the mechanism of photocatalytic uranium extraction.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Chemical Science
·
2024
·
IF 7.6
Wei-Xing Chen,Zi-Sheng Li,Harry W. T. Morgan,Cong-Cong Shu,Zhong-Ming Sun,John E. McGrady
We report here the synthesis and characterization of two endohedral Zintl-ion clusters, [Fe4Sn18]4− and [Fe4Pb18]4−, which contain rhombic Fe4 cores. The Fe–Fe bond lengths are all below 2.5 Å, distinctly shorter than in the corresponding Cu clusters, indicating the presence of Fe–Fe bonding. Subtle differences in the structure of the Fe4 core between the two clusters suggest that the change in tetrel element causes a change in electronic ground state, with a very short Fe–Fe bond length of 2.328 Å present across the diagonal of the rhombus in the lead case.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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